[
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Autauga, AL",
    "epa_source_county_label": "Autauga County",
    "county_or_equivalent_display": "Autauga County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Autauga County",
    "census_2025_geoid": "01001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Baldwin, AL",
    "epa_source_county_label": "Baldwin County",
    "county_or_equivalent_display": "Baldwin County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Baldwin County",
    "census_2025_geoid": "01003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Barbour, AL",
    "epa_source_county_label": "Barbour County",
    "county_or_equivalent_display": "Barbour County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Barbour County",
    "census_2025_geoid": "01005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bibb, AL",
    "epa_source_county_label": "Bibb County",
    "county_or_equivalent_display": "Bibb County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bibb County",
    "census_2025_geoid": "01007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Blount, AL",
    "epa_source_county_label": "Blount County",
    "county_or_equivalent_display": "Blount County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Blount County",
    "census_2025_geoid": "01009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bullock, AL",
    "epa_source_county_label": "Bullock County",
    "county_or_equivalent_display": "Bullock County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bullock County",
    "census_2025_geoid": "01011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Butler, AL",
    "epa_source_county_label": "Butler County",
    "county_or_equivalent_display": "Butler County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Butler County",
    "census_2025_geoid": "01013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Calhoun, AL",
    "epa_source_county_label": "Calhoun County",
    "county_or_equivalent_display": "Calhoun County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Calhoun County",
    "census_2025_geoid": "01015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chambers, AL",
    "epa_source_county_label": "Chambers County",
    "county_or_equivalent_display": "Chambers County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chambers County",
    "census_2025_geoid": "01017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cherokee, AL",
    "epa_source_county_label": "Cherokee County",
    "county_or_equivalent_display": "Cherokee County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cherokee County",
    "census_2025_geoid": "01019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chilton, AL",
    "epa_source_county_label": "Chilton County",
    "county_or_equivalent_display": "Chilton County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chilton County",
    "census_2025_geoid": "01021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Choctaw, AL",
    "epa_source_county_label": "Choctaw County",
    "county_or_equivalent_display": "Choctaw County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Choctaw County",
    "census_2025_geoid": "01023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clarke, AL",
    "epa_source_county_label": "Clarke County",
    "county_or_equivalent_display": "Clarke County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clarke County",
    "census_2025_geoid": "01025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clay, AL",
    "epa_source_county_label": "Clay County",
    "county_or_equivalent_display": "Clay County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clay County",
    "census_2025_geoid": "01027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cleburne, AL",
    "epa_source_county_label": "Cleburne County",
    "county_or_equivalent_display": "Cleburne County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cleburne County",
    "census_2025_geoid": "01029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Coffee, AL",
    "epa_source_county_label": "Coffee County",
    "county_or_equivalent_display": "Coffee County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Coffee County",
    "census_2025_geoid": "01031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Colbert, AL",
    "epa_source_county_label": "Colbert County",
    "county_or_equivalent_display": "Colbert County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Colbert County",
    "census_2025_geoid": "01033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Conecuh, AL",
    "epa_source_county_label": "Conecuh County",
    "county_or_equivalent_display": "Conecuh County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Conecuh County",
    "census_2025_geoid": "01035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Coosa, AL",
    "epa_source_county_label": "Coosa County",
    "county_or_equivalent_display": "Coosa County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Coosa County",
    "census_2025_geoid": "01037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Covington, AL",
    "epa_source_county_label": "Covington County",
    "county_or_equivalent_display": "Covington County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Covington County",
    "census_2025_geoid": "01039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Crenshaw, AL",
    "epa_source_county_label": "Crenshaw County",
    "county_or_equivalent_display": "Crenshaw County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Crenshaw County",
    "census_2025_geoid": "01041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cullman, AL",
    "epa_source_county_label": "Cullman County",
    "county_or_equivalent_display": "Cullman County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cullman County",
    "census_2025_geoid": "01043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dale, AL",
    "epa_source_county_label": "Dale County",
    "county_or_equivalent_display": "Dale County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dale County",
    "census_2025_geoid": "01045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dallas, AL",
    "epa_source_county_label": "Dallas County",
    "county_or_equivalent_display": "Dallas County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dallas County",
    "census_2025_geoid": "01047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "De Kalb, AL",
    "epa_source_county_label": "DeKalb County",
    "county_or_equivalent_display": "DeKalb County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "DeKalb County",
    "census_2025_geoid": "01049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Elmore, AL",
    "epa_source_county_label": "Elmore County",
    "county_or_equivalent_display": "Elmore County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Elmore County",
    "census_2025_geoid": "01051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Escambia, AL",
    "epa_source_county_label": "Escambia County",
    "county_or_equivalent_display": "Escambia County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Escambia County",
    "census_2025_geoid": "01053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Etowah, AL",
    "epa_source_county_label": "Etowah County",
    "county_or_equivalent_display": "Etowah County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Etowah County",
    "census_2025_geoid": "01055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fayette, AL",
    "epa_source_county_label": "Fayette County",
    "county_or_equivalent_display": "Fayette County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fayette County",
    "census_2025_geoid": "01057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Franklin, AL",
    "epa_source_county_label": "Franklin County",
    "county_or_equivalent_display": "Franklin County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Franklin County",
    "census_2025_geoid": "01059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Geneva, AL",
    "epa_source_county_label": "Geneva County",
    "county_or_equivalent_display": "Geneva County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Geneva County",
    "census_2025_geoid": "01061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Greene, AL",
    "epa_source_county_label": "Greene County",
    "county_or_equivalent_display": "Greene County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Greene County",
    "census_2025_geoid": "01063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hale, AL",
    "epa_source_county_label": "Hale County",
    "county_or_equivalent_display": "Hale County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hale County",
    "census_2025_geoid": "01065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Henry, AL",
    "epa_source_county_label": "Henry County",
    "county_or_equivalent_display": "Henry County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Henry County",
    "census_2025_geoid": "01067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Houston, AL",
    "epa_source_county_label": "Houston County",
    "county_or_equivalent_display": "Houston County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Houston County",
    "census_2025_geoid": "01069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jackson, AL",
    "epa_source_county_label": "Jackson County",
    "county_or_equivalent_display": "Jackson County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jackson County",
    "census_2025_geoid": "01071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jefferson, AL",
    "epa_source_county_label": "Jefferson County",
    "county_or_equivalent_display": "Jefferson County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jefferson County",
    "census_2025_geoid": "01073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lamar, AL",
    "epa_source_county_label": "Lamar County",
    "county_or_equivalent_display": "Lamar County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lamar County",
    "census_2025_geoid": "01075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lauderdale, AL",
    "epa_source_county_label": "Lauderdale County",
    "county_or_equivalent_display": "Lauderdale County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lauderdale County",
    "census_2025_geoid": "01077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lawrence, AL",
    "epa_source_county_label": "Lawrence County",
    "county_or_equivalent_display": "Lawrence County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lawrence County",
    "census_2025_geoid": "01079",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lee, AL",
    "epa_source_county_label": "Lee County",
    "county_or_equivalent_display": "Lee County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lee County",
    "census_2025_geoid": "01081",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Limestone, AL",
    "epa_source_county_label": "Limestone County",
    "county_or_equivalent_display": "Limestone County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Limestone County",
    "census_2025_geoid": "01083",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lowndes, AL",
    "epa_source_county_label": "Lowndes County",
    "county_or_equivalent_display": "Lowndes County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lowndes County",
    "census_2025_geoid": "01085",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Macon, AL",
    "epa_source_county_label": "Macon County",
    "county_or_equivalent_display": "Macon County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Macon County",
    "census_2025_geoid": "01087",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Madison, AL",
    "epa_source_county_label": "Madison County",
    "county_or_equivalent_display": "Madison County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Madison County",
    "census_2025_geoid": "01089",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marengo, AL",
    "epa_source_county_label": "Marengo County",
    "county_or_equivalent_display": "Marengo County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marengo County",
    "census_2025_geoid": "01091",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marion, AL",
    "epa_source_county_label": "Marion County",
    "county_or_equivalent_display": "Marion County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marion County",
    "census_2025_geoid": "01093",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marshall, AL",
    "epa_source_county_label": "Marshall County",
    "county_or_equivalent_display": "Marshall County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marshall County",
    "census_2025_geoid": "01095",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mobile, AL",
    "epa_source_county_label": "Mobile County",
    "county_or_equivalent_display": "Mobile County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mobile County",
    "census_2025_geoid": "01097",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Monroe, AL",
    "epa_source_county_label": "Monroe County",
    "county_or_equivalent_display": "Monroe County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Monroe County",
    "census_2025_geoid": "01099",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Montgomery, AL",
    "epa_source_county_label": "Montgomery County",
    "county_or_equivalent_display": "Montgomery County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Montgomery County",
    "census_2025_geoid": "01101",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Morgan, AL",
    "epa_source_county_label": "Morgan County",
    "county_or_equivalent_display": "Morgan County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Morgan County",
    "census_2025_geoid": "01103",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Perry, AL",
    "epa_source_county_label": "Perry County",
    "county_or_equivalent_display": "Perry County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Perry County",
    "census_2025_geoid": "01105",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pickens, AL",
    "epa_source_county_label": "Pickens County",
    "county_or_equivalent_display": "Pickens County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pickens County",
    "census_2025_geoid": "01107",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pike, AL",
    "epa_source_county_label": "Pike County",
    "county_or_equivalent_display": "Pike County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pike County",
    "census_2025_geoid": "01109",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Randolph, AL",
    "epa_source_county_label": "Randolph County",
    "county_or_equivalent_display": "Randolph County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Randolph County",
    "census_2025_geoid": "01111",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Russell, AL",
    "epa_source_county_label": "Russell County",
    "county_or_equivalent_display": "Russell County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Russell County",
    "census_2025_geoid": "01113",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Shelby, AL",
    "epa_source_county_label": "Shelby County",
    "county_or_equivalent_display": "Shelby County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Shelby County",
    "census_2025_geoid": "01117",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "St. Clair, AL",
    "epa_source_county_label": "St. Clair County",
    "county_or_equivalent_display": "St. Clair County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "St. Clair County",
    "census_2025_geoid": "01115",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sumter, AL",
    "epa_source_county_label": "Sumter County",
    "county_or_equivalent_display": "Sumter County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sumter County",
    "census_2025_geoid": "01119",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Talladega, AL",
    "epa_source_county_label": "Talladega County",
    "county_or_equivalent_display": "Talladega County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Talladega County",
    "census_2025_geoid": "01121",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tallapoosa, AL",
    "epa_source_county_label": "Tallapoosa County",
    "county_or_equivalent_display": "Tallapoosa County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tallapoosa County",
    "census_2025_geoid": "01123",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tuscaloosa, AL",
    "epa_source_county_label": "Tuscaloosa County",
    "county_or_equivalent_display": "Tuscaloosa County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tuscaloosa County",
    "census_2025_geoid": "01125",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Walker, AL",
    "epa_source_county_label": "Walker County",
    "county_or_equivalent_display": "Walker County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Walker County",
    "census_2025_geoid": "01127",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washington, AL",
    "epa_source_county_label": "Washington County",
    "county_or_equivalent_display": "Washington County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washington County",
    "census_2025_geoid": "01129",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wilcox, AL",
    "epa_source_county_label": "Wilcox County",
    "county_or_equivalent_display": "Wilcox County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wilcox County",
    "census_2025_geoid": "01131",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Winston, AL",
    "epa_source_county_label": "Winston County",
    "county_or_equivalent_display": "Winston County",
    "state_name": "Alabama",
    "state_abbreviation": "AL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Winston County",
    "census_2025_geoid": "01133",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Aleutians East, AK",
    "epa_source_county_label": "Aleutians East Borough",
    "county_or_equivalent_display": "Aleutians East Borough",
    "state_name": "Alaska",
    "state_abbreviation": "AK",
    "geography_type": "borough",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Aleutians East Borough",
    "census_2025_geoid": "02013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Aleutians West, AK",
    "epa_source_county_label": "Aleutians West Census Area",
    "county_or_equivalent_display": "Aleutians West Census Area",
    "state_name": "Alaska",
    "state_abbreviation": "AK",
    "geography_type": "census area",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Aleutians West Census Area",
    "census_2025_geoid": "02016",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Anchorage, AK",
    "epa_source_county_label": "Anchorage Municipality",
    "county_or_equivalent_display": "Anchorage Municipality",
    "state_name": "Alaska",
    "state_abbreviation": "AK",
    "geography_type": "municipality",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Anchorage Municipality",
    "census_2025_geoid": "02020",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bethel, AK",
    "epa_source_county_label": "Bethel Census Area",
    "county_or_equivalent_display": "Bethel Census Area",
    "state_name": "Alaska",
    "state_abbreviation": "AK",
    "geography_type": "census area",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bethel Census Area",
    "census_2025_geoid": "02050",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bristol Bay, AK",
    "epa_source_county_label": "Bristol Bay Borough",
    "county_or_equivalent_display": "Bristol Bay Borough",
    "state_name": "Alaska",
    "state_abbreviation": "AK",
    "geography_type": "borough",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bristol Bay Borough",
    "census_2025_geoid": "02060",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Denali, AK",
    "epa_source_county_label": "Denali Borough",
    "county_or_equivalent_display": "Denali Borough",
    "state_name": "Alaska",
    "state_abbreviation": "AK",
    "geography_type": "borough",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Denali Borough",
    "census_2025_geoid": "02068",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dillingham, AK",
    "epa_source_county_label": "Dillingham Census Area",
    "county_or_equivalent_display": "Dillingham Census Area",
    "state_name": "Alaska",
    "state_abbreviation": "AK",
    "geography_type": "census area",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dillingham Census Area",
    "census_2025_geoid": "02070",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fairbanks North Star, AK",
    "epa_source_county_label": "Fairbanks North Star Borough",
    "county_or_equivalent_display": "Fairbanks North Star Borough",
    "state_name": "Alaska",
    "state_abbreviation": "AK",
    "geography_type": "borough",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fairbanks North Star Borough",
    "census_2025_geoid": "02090",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Haines, AK",
    "epa_source_county_label": "Haines Borough",
    "county_or_equivalent_display": "Haines Borough",
    "state_name": "Alaska",
    "state_abbreviation": "AK",
    "geography_type": "borough",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Haines Borough",
    "census_2025_geoid": "02100",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Juneau, AK",
    "epa_source_county_label": "Juneau City and Borough",
    "county_or_equivalent_display": "Juneau City and Borough",
    "state_name": "Alaska",
    "state_abbreviation": "AK",
    "geography_type": "city and borough",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Juneau City and Borough",
    "census_2025_geoid": "02110",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kenai Peninsula, AK",
    "epa_source_county_label": "Kenai Peninsula Borough",
    "county_or_equivalent_display": "Kenai Peninsula Borough",
    "state_name": "Alaska",
    "state_abbreviation": "AK",
    "geography_type": "borough",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kenai Peninsula Borough",
    "census_2025_geoid": "02122",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ketchikan Gateway, AK",
    "epa_source_county_label": "Ketchikan Gateway Borough",
    "county_or_equivalent_display": "Ketchikan Gateway Borough",
    "state_name": "Alaska",
    "state_abbreviation": "AK",
    "geography_type": "borough",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ketchikan Gateway Borough",
    "census_2025_geoid": "02130",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kodiak Island, AK",
    "epa_source_county_label": "Kodiak Island Borough",
    "county_or_equivalent_display": "Kodiak Island Borough",
    "state_name": "Alaska",
    "state_abbreviation": "AK",
    "geography_type": "borough",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kodiak Island Borough",
    "census_2025_geoid": "02150",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lake and Peninsula, AK",
    "epa_source_county_label": "Lake and Peninsula Borough",
    "county_or_equivalent_display": "Lake and Peninsula Borough",
    "state_name": "Alaska",
    "state_abbreviation": "AK",
    "geography_type": "borough",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lake and Peninsula Borough",
    "census_2025_geoid": "02164",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Matanuska-Susitna, AK",
    "epa_source_county_label": "Matanuska-Susitna Borough",
    "county_or_equivalent_display": "Matanuska-Susitna Borough",
    "state_name": "Alaska",
    "state_abbreviation": "AK",
    "geography_type": "borough",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Matanuska-Susitna Borough",
    "census_2025_geoid": "02170",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Nome, AK",
    "epa_source_county_label": "Nome Census Area",
    "county_or_equivalent_display": "Nome Census Area",
    "state_name": "Alaska",
    "state_abbreviation": "AK",
    "geography_type": "census area",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Nome Census Area",
    "census_2025_geoid": "02180",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "North Slope, AK",
    "epa_source_county_label": "North Slope Borough",
    "county_or_equivalent_display": "North Slope Borough",
    "state_name": "Alaska",
    "state_abbreviation": "AK",
    "geography_type": "borough",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "North Slope Borough",
    "census_2025_geoid": "02185",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Northwest Arctic, AK",
    "epa_source_county_label": "Northwest Arctic Borough",
    "county_or_equivalent_display": "Northwest Arctic Borough",
    "state_name": "Alaska",
    "state_abbreviation": "AK",
    "geography_type": "borough",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Northwest Arctic Borough",
    "census_2025_geoid": "02188",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Prince of Wales-Outer Ketchikan, AK",
    "epa_source_county_label": "Prince of Wales-Outer Ketchikan Census Area",
    "county_or_equivalent_display": "Prince of Wales-Outer Ketchikan Census Area",
    "state_name": "Alaska",
    "state_abbreviation": "AK",
    "geography_type": "census area",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "legacy_or_unmatched",
    "census_2025_county_or_equivalent_name": "",
    "census_2025_geoid": "",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; current Census geography match intentionally left unresolved.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "EPA source geography has no direct name match in the 2025 Census file; no current GEOID was assigned and no zone was silently reallocated."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sitka, AK",
    "epa_source_county_label": "Sitka City and Borough",
    "county_or_equivalent_display": "Sitka City and Borough",
    "state_name": "Alaska",
    "state_abbreviation": "AK",
    "geography_type": "city and borough",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sitka City and Borough",
    "census_2025_geoid": "02220",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Skagway-Hoonah-Angoon, AK",
    "epa_source_county_label": "Skagway Municipality",
    "county_or_equivalent_display": "Skagway Municipality",
    "state_name": "Alaska",
    "state_abbreviation": "AK",
    "geography_type": "municipality",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Skagway Municipality",
    "census_2025_geoid": "02230",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Southeast Fairbanks, AK",
    "epa_source_county_label": "Southeast Fairbanks Census Area",
    "county_or_equivalent_display": "Southeast Fairbanks Census Area",
    "state_name": "Alaska",
    "state_abbreviation": "AK",
    "geography_type": "census area",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Southeast Fairbanks Census Area",
    "census_2025_geoid": "02240",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Valdez-Cordova, AK",
    "epa_source_county_label": "Valdez-Cordova Census Area",
    "county_or_equivalent_display": "Valdez-Cordova Census Area",
    "state_name": "Alaska",
    "state_abbreviation": "AK",
    "geography_type": "census area",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "legacy_or_unmatched",
    "census_2025_county_or_equivalent_name": "",
    "census_2025_geoid": "",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; current Census geography match intentionally left unresolved.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "EPA source geography has no direct name match in the 2025 Census file; no current GEOID was assigned and no zone was silently reallocated."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wade Hampton, AK",
    "epa_source_county_label": "Wade Hampton Census Area",
    "county_or_equivalent_display": "Wade Hampton Census Area",
    "state_name": "Alaska",
    "state_abbreviation": "AK",
    "geography_type": "census area",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "legacy_or_unmatched",
    "census_2025_county_or_equivalent_name": "",
    "census_2025_geoid": "",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; current Census geography match intentionally left unresolved.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "EPA source geography has no direct name match in the 2025 Census file; no current GEOID was assigned and no zone was silently reallocated."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wrangell-Petersburg, AK",
    "epa_source_county_label": "Wrangell-Petersburg Census Area",
    "county_or_equivalent_display": "Wrangell-Petersburg Census Area",
    "state_name": "Alaska",
    "state_abbreviation": "AK",
    "geography_type": "census area",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "legacy_or_unmatched",
    "census_2025_county_or_equivalent_name": "",
    "census_2025_geoid": "",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; current Census geography match intentionally left unresolved.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "EPA source geography has no direct name match in the 2025 Census file; no current GEOID was assigned and no zone was silently reallocated."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Yakutat, AK",
    "epa_source_county_label": "Yakutat City and Borough",
    "county_or_equivalent_display": "Yakutat City and Borough",
    "state_name": "Alaska",
    "state_abbreviation": "AK",
    "geography_type": "city and borough",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Yakutat City and Borough",
    "census_2025_geoid": "02282",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Yukon-Koyukuk, AK",
    "epa_source_county_label": "Yukon-Koyukuk Census Area",
    "county_or_equivalent_display": "Yukon-Koyukuk Census Area",
    "state_name": "Alaska",
    "state_abbreviation": "AK",
    "geography_type": "census area",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Yukon-Koyukuk Census Area",
    "census_2025_geoid": "02290",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Apache, AZ",
    "epa_source_county_label": "Apache County",
    "county_or_equivalent_display": "Apache County",
    "state_name": "Arizona",
    "state_abbreviation": "AZ",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Apache County",
    "census_2025_geoid": "04001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cochise, AZ",
    "epa_source_county_label": "Cochise County",
    "county_or_equivalent_display": "Cochise County",
    "state_name": "Arizona",
    "state_abbreviation": "AZ",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cochise County",
    "census_2025_geoid": "04003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Coconino, AZ",
    "epa_source_county_label": "Coconino County",
    "county_or_equivalent_display": "Coconino County",
    "state_name": "Arizona",
    "state_abbreviation": "AZ",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Coconino County",
    "census_2025_geoid": "04005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gila, AZ",
    "epa_source_county_label": "Gila County",
    "county_or_equivalent_display": "Gila County",
    "state_name": "Arizona",
    "state_abbreviation": "AZ",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gila County",
    "census_2025_geoid": "04007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Graham, AZ",
    "epa_source_county_label": "Graham County",
    "county_or_equivalent_display": "Graham County",
    "state_name": "Arizona",
    "state_abbreviation": "AZ",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Graham County",
    "census_2025_geoid": "04009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Greenlee, AZ",
    "epa_source_county_label": "Greenlee County",
    "county_or_equivalent_display": "Greenlee County",
    "state_name": "Arizona",
    "state_abbreviation": "AZ",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Greenlee County",
    "census_2025_geoid": "04011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "La Paz, AZ",
    "epa_source_county_label": "La Paz County",
    "county_or_equivalent_display": "La Paz County",
    "state_name": "Arizona",
    "state_abbreviation": "AZ",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "La Paz County",
    "census_2025_geoid": "04012",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Maricopa, AZ",
    "epa_source_county_label": "Maricopa County",
    "county_or_equivalent_display": "Maricopa County",
    "state_name": "Arizona",
    "state_abbreviation": "AZ",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Maricopa County",
    "census_2025_geoid": "04013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mohave, AZ",
    "epa_source_county_label": "Mohave County",
    "county_or_equivalent_display": "Mohave County",
    "state_name": "Arizona",
    "state_abbreviation": "AZ",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mohave County",
    "census_2025_geoid": "04015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Navajo, AZ",
    "epa_source_county_label": "Navajo County",
    "county_or_equivalent_display": "Navajo County",
    "state_name": "Arizona",
    "state_abbreviation": "AZ",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Navajo County",
    "census_2025_geoid": "04017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pima, AZ",
    "epa_source_county_label": "Pima County",
    "county_or_equivalent_display": "Pima County",
    "state_name": "Arizona",
    "state_abbreviation": "AZ",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pima County",
    "census_2025_geoid": "04019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pinal, AZ",
    "epa_source_county_label": "Pinal County",
    "county_or_equivalent_display": "Pinal County",
    "state_name": "Arizona",
    "state_abbreviation": "AZ",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pinal County",
    "census_2025_geoid": "04021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Santa Cruz, AZ",
    "epa_source_county_label": "Santa Cruz County",
    "county_or_equivalent_display": "Santa Cruz County",
    "state_name": "Arizona",
    "state_abbreviation": "AZ",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Santa Cruz County",
    "census_2025_geoid": "04023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Yavapai, AZ",
    "epa_source_county_label": "Yavapai County",
    "county_or_equivalent_display": "Yavapai County",
    "state_name": "Arizona",
    "state_abbreviation": "AZ",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Yavapai County",
    "census_2025_geoid": "04025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Yuma, AZ",
    "epa_source_county_label": "Yuma County",
    "county_or_equivalent_display": "Yuma County",
    "state_name": "Arizona",
    "state_abbreviation": "AZ",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Yuma County",
    "census_2025_geoid": "04027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Arkansas, AR",
    "epa_source_county_label": "Arkansas County",
    "county_or_equivalent_display": "Arkansas County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Arkansas County",
    "census_2025_geoid": "05001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ashley, AR",
    "epa_source_county_label": "Ashley County",
    "county_or_equivalent_display": "Ashley County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ashley County",
    "census_2025_geoid": "05003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Baxter, AR",
    "epa_source_county_label": "Baxter County",
    "county_or_equivalent_display": "Baxter County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Baxter County",
    "census_2025_geoid": "05005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Benton, AR",
    "epa_source_county_label": "Benton County",
    "county_or_equivalent_display": "Benton County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Benton County",
    "census_2025_geoid": "05007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Boone, AR",
    "epa_source_county_label": "Boone County",
    "county_or_equivalent_display": "Boone County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Boone County",
    "census_2025_geoid": "05009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bradley, AR",
    "epa_source_county_label": "Bradley County",
    "county_or_equivalent_display": "Bradley County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bradley County",
    "census_2025_geoid": "05011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Calhoun, AR",
    "epa_source_county_label": "Calhoun County",
    "county_or_equivalent_display": "Calhoun County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Calhoun County",
    "census_2025_geoid": "05013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Carroll, AR",
    "epa_source_county_label": "Carroll County",
    "county_or_equivalent_display": "Carroll County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Carroll County",
    "census_2025_geoid": "05015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chicot, AR",
    "epa_source_county_label": "Chicot County",
    "county_or_equivalent_display": "Chicot County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chicot County",
    "census_2025_geoid": "05017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clark, AR",
    "epa_source_county_label": "Clark County",
    "county_or_equivalent_display": "Clark County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clark County",
    "census_2025_geoid": "05019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clay, AR",
    "epa_source_county_label": "Clay County",
    "county_or_equivalent_display": "Clay County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clay County",
    "census_2025_geoid": "05021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cleburne, AR",
    "epa_source_county_label": "Cleburne County",
    "county_or_equivalent_display": "Cleburne County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cleburne County",
    "census_2025_geoid": "05023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cleveland, AR",
    "epa_source_county_label": "Cleveland County",
    "county_or_equivalent_display": "Cleveland County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cleveland County",
    "census_2025_geoid": "05025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Columbia, AR",
    "epa_source_county_label": "Columbia County",
    "county_or_equivalent_display": "Columbia County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Columbia County",
    "census_2025_geoid": "05027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Conway, AR",
    "epa_source_county_label": "Conway County",
    "county_or_equivalent_display": "Conway County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Conway County",
    "census_2025_geoid": "05029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Craighead, AR",
    "epa_source_county_label": "Craighead County",
    "county_or_equivalent_display": "Craighead County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Craighead County",
    "census_2025_geoid": "05031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Crawford, AR",
    "epa_source_county_label": "Crawford County",
    "county_or_equivalent_display": "Crawford County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Crawford County",
    "census_2025_geoid": "05033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Crittenden, AR",
    "epa_source_county_label": "Crittenden County",
    "county_or_equivalent_display": "Crittenden County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Crittenden County",
    "census_2025_geoid": "05035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cross, AR",
    "epa_source_county_label": "Cross County",
    "county_or_equivalent_display": "Cross County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cross County",
    "census_2025_geoid": "05037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dallas, AR",
    "epa_source_county_label": "Dallas County",
    "county_or_equivalent_display": "Dallas County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dallas County",
    "census_2025_geoid": "05039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Desha, AR",
    "epa_source_county_label": "Desha County",
    "county_or_equivalent_display": "Desha County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Desha County",
    "census_2025_geoid": "05041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Drew, AR",
    "epa_source_county_label": "Drew County",
    "county_or_equivalent_display": "Drew County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Drew County",
    "census_2025_geoid": "05043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Faulkner, AR",
    "epa_source_county_label": "Faulkner County",
    "county_or_equivalent_display": "Faulkner County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Faulkner County",
    "census_2025_geoid": "05045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Franklin, AR",
    "epa_source_county_label": "Franklin County",
    "county_or_equivalent_display": "Franklin County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Franklin County",
    "census_2025_geoid": "05047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fulton, AR",
    "epa_source_county_label": "Fulton County",
    "county_or_equivalent_display": "Fulton County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fulton County",
    "census_2025_geoid": "05049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Garland, AR",
    "epa_source_county_label": "Garland County",
    "county_or_equivalent_display": "Garland County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Garland County",
    "census_2025_geoid": "05051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grant, AR",
    "epa_source_county_label": "Grant County",
    "county_or_equivalent_display": "Grant County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grant County",
    "census_2025_geoid": "05053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Greene, AR",
    "epa_source_county_label": "Greene County",
    "county_or_equivalent_display": "Greene County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Greene County",
    "census_2025_geoid": "05055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hempstead, AR",
    "epa_source_county_label": "Hempstead County",
    "county_or_equivalent_display": "Hempstead County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hempstead County",
    "census_2025_geoid": "05057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hot Spring, AR",
    "epa_source_county_label": "Hot Spring County",
    "county_or_equivalent_display": "Hot Spring County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hot Spring County",
    "census_2025_geoid": "05059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Howard, AR",
    "epa_source_county_label": "Howard County",
    "county_or_equivalent_display": "Howard County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Howard County",
    "census_2025_geoid": "05061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Independence, AR",
    "epa_source_county_label": "Independence County",
    "county_or_equivalent_display": "Independence County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Independence County",
    "census_2025_geoid": "05063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Izard, AR",
    "epa_source_county_label": "Izard County",
    "county_or_equivalent_display": "Izard County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Izard County",
    "census_2025_geoid": "05065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jackson, AR",
    "epa_source_county_label": "Jackson County",
    "county_or_equivalent_display": "Jackson County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jackson County",
    "census_2025_geoid": "05067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jefferson, AR",
    "epa_source_county_label": "Jefferson County",
    "county_or_equivalent_display": "Jefferson County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jefferson County",
    "census_2025_geoid": "05069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Johnson, AR",
    "epa_source_county_label": "Johnson County",
    "county_or_equivalent_display": "Johnson County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Johnson County",
    "census_2025_geoid": "05071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lafayette, AR",
    "epa_source_county_label": "Lafayette County",
    "county_or_equivalent_display": "Lafayette County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lafayette County",
    "census_2025_geoid": "05073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lawrence, AR",
    "epa_source_county_label": "Lawrence County",
    "county_or_equivalent_display": "Lawrence County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lawrence County",
    "census_2025_geoid": "05075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lee, AR",
    "epa_source_county_label": "Lee County",
    "county_or_equivalent_display": "Lee County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lee County",
    "census_2025_geoid": "05077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lincoln, AR",
    "epa_source_county_label": "Lincoln County",
    "county_or_equivalent_display": "Lincoln County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lincoln County",
    "census_2025_geoid": "05079",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Little River, AR",
    "epa_source_county_label": "Little River County",
    "county_or_equivalent_display": "Little River County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Little River County",
    "census_2025_geoid": "05081",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Logan, AR",
    "epa_source_county_label": "Logan County",
    "county_or_equivalent_display": "Logan County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Logan County",
    "census_2025_geoid": "05083",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lonoke, AR",
    "epa_source_county_label": "Lonoke County",
    "county_or_equivalent_display": "Lonoke County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lonoke County",
    "census_2025_geoid": "05085",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Madison, AR",
    "epa_source_county_label": "Madison County",
    "county_or_equivalent_display": "Madison County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Madison County",
    "census_2025_geoid": "05087",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marion, AR",
    "epa_source_county_label": "Marion County",
    "county_or_equivalent_display": "Marion County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marion County",
    "census_2025_geoid": "05089",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Miller, AR",
    "epa_source_county_label": "Miller County",
    "county_or_equivalent_display": "Miller County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Miller County",
    "census_2025_geoid": "05091",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mississippi, AR",
    "epa_source_county_label": "Mississippi County",
    "county_or_equivalent_display": "Mississippi County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mississippi County",
    "census_2025_geoid": "05093",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Monroe, AR",
    "epa_source_county_label": "Monroe County",
    "county_or_equivalent_display": "Monroe County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Monroe County",
    "census_2025_geoid": "05095",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Montgomery, AR",
    "epa_source_county_label": "Montgomery County",
    "county_or_equivalent_display": "Montgomery County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Montgomery County",
    "census_2025_geoid": "05097",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Nevada, AR",
    "epa_source_county_label": "Nevada County",
    "county_or_equivalent_display": "Nevada County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Nevada County",
    "census_2025_geoid": "05099",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Newton, AR",
    "epa_source_county_label": "Newton County",
    "county_or_equivalent_display": "Newton County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Newton County",
    "census_2025_geoid": "05101",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ouachita, AR",
    "epa_source_county_label": "Ouachita County",
    "county_or_equivalent_display": "Ouachita County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ouachita County",
    "census_2025_geoid": "05103",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Perry, AR",
    "epa_source_county_label": "Perry County",
    "county_or_equivalent_display": "Perry County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Perry County",
    "census_2025_geoid": "05105",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Phillips, AR",
    "epa_source_county_label": "Phillips County",
    "county_or_equivalent_display": "Phillips County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Phillips County",
    "census_2025_geoid": "05107",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pike, AR",
    "epa_source_county_label": "Pike County",
    "county_or_equivalent_display": "Pike County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pike County",
    "census_2025_geoid": "05109",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Poinsett, AR",
    "epa_source_county_label": "Poinsett County",
    "county_or_equivalent_display": "Poinsett County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Poinsett County",
    "census_2025_geoid": "05111",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Polk, AR",
    "epa_source_county_label": "Polk County",
    "county_or_equivalent_display": "Polk County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Polk County",
    "census_2025_geoid": "05113",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pope, AR",
    "epa_source_county_label": "Pope County",
    "county_or_equivalent_display": "Pope County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pope County",
    "census_2025_geoid": "05115",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Prairie, AR",
    "epa_source_county_label": "Prairie County",
    "county_or_equivalent_display": "Prairie County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Prairie County",
    "census_2025_geoid": "05117",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pulaski, AR",
    "epa_source_county_label": "Pulaski County",
    "county_or_equivalent_display": "Pulaski County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pulaski County",
    "census_2025_geoid": "05119",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Randolph, AR",
    "epa_source_county_label": "Randolph County",
    "county_or_equivalent_display": "Randolph County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Randolph County",
    "census_2025_geoid": "05121",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Saline, AR",
    "epa_source_county_label": "Saline County",
    "county_or_equivalent_display": "Saline County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Saline County",
    "census_2025_geoid": "05125",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Scott, AR",
    "epa_source_county_label": "Scott County",
    "county_or_equivalent_display": "Scott County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Scott County",
    "census_2025_geoid": "05127",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Searcy, AR",
    "epa_source_county_label": "Searcy County",
    "county_or_equivalent_display": "Searcy County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Searcy County",
    "census_2025_geoid": "05129",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sebastian, AR",
    "epa_source_county_label": "Sebastian County",
    "county_or_equivalent_display": "Sebastian County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sebastian County",
    "census_2025_geoid": "05131",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sevier, AR",
    "epa_source_county_label": "Sevier County",
    "county_or_equivalent_display": "Sevier County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sevier County",
    "census_2025_geoid": "05133",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sharp, AR",
    "epa_source_county_label": "Sharp County",
    "county_or_equivalent_display": "Sharp County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sharp County",
    "census_2025_geoid": "05135",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "St. Francis, AR",
    "epa_source_county_label": "St. Francis County",
    "county_or_equivalent_display": "St. Francis County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "St. Francis County",
    "census_2025_geoid": "05123",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Stone, AR",
    "epa_source_county_label": "Stone County",
    "county_or_equivalent_display": "Stone County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Stone County",
    "census_2025_geoid": "05137",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Union, AR",
    "epa_source_county_label": "Union County",
    "county_or_equivalent_display": "Union County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Union County",
    "census_2025_geoid": "05139",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Van Buren, AR",
    "epa_source_county_label": "Van Buren County",
    "county_or_equivalent_display": "Van Buren County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Van Buren County",
    "census_2025_geoid": "05141",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washington, AR",
    "epa_source_county_label": "Washington County",
    "county_or_equivalent_display": "Washington County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washington County",
    "census_2025_geoid": "05143",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "White, AR",
    "epa_source_county_label": "White County",
    "county_or_equivalent_display": "White County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "White County",
    "census_2025_geoid": "05145",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Woodruff, AR",
    "epa_source_county_label": "Woodruff County",
    "county_or_equivalent_display": "Woodruff County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Woodruff County",
    "census_2025_geoid": "05147",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Yell, AR",
    "epa_source_county_label": "Yell County",
    "county_or_equivalent_display": "Yell County",
    "state_name": "Arkansas",
    "state_abbreviation": "AR",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Yell County",
    "census_2025_geoid": "05149",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Alameda, CA",
    "epa_source_county_label": "Alameda County",
    "county_or_equivalent_display": "Alameda County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Alameda County",
    "census_2025_geoid": "06001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Alpine, CA",
    "epa_source_county_label": "Alpine County",
    "county_or_equivalent_display": "Alpine County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Alpine County",
    "census_2025_geoid": "06003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Amador, CA",
    "epa_source_county_label": "Amador County",
    "county_or_equivalent_display": "Amador County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Amador County",
    "census_2025_geoid": "06005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Butte, CA",
    "epa_source_county_label": "Butte County",
    "county_or_equivalent_display": "Butte County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Butte County",
    "census_2025_geoid": "06007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Calaveras, CA",
    "epa_source_county_label": "Calaveras County",
    "county_or_equivalent_display": "Calaveras County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Calaveras County",
    "census_2025_geoid": "06009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Colusa, CA",
    "epa_source_county_label": "Colusa County",
    "county_or_equivalent_display": "Colusa County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Colusa County",
    "census_2025_geoid": "06011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Contra Costa, CA",
    "epa_source_county_label": "Contra Costa County",
    "county_or_equivalent_display": "Contra Costa County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Contra Costa County",
    "census_2025_geoid": "06013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Del Norte, CA",
    "epa_source_county_label": "Del Norte County",
    "county_or_equivalent_display": "Del Norte County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Del Norte County",
    "census_2025_geoid": "06015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "El Dorado, CA",
    "epa_source_county_label": "El Dorado County",
    "county_or_equivalent_display": "El Dorado County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "El Dorado County",
    "census_2025_geoid": "06017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fresno, CA",
    "epa_source_county_label": "Fresno County",
    "county_or_equivalent_display": "Fresno County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fresno County",
    "census_2025_geoid": "06019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Glenn, CA",
    "epa_source_county_label": "Glenn County",
    "county_or_equivalent_display": "Glenn County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Glenn County",
    "census_2025_geoid": "06021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Humboldt, CA",
    "epa_source_county_label": "Humboldt County",
    "county_or_equivalent_display": "Humboldt County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Humboldt County",
    "census_2025_geoid": "06023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Imperial, CA",
    "epa_source_county_label": "Imperial County",
    "county_or_equivalent_display": "Imperial County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Imperial County",
    "census_2025_geoid": "06025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Inyo, CA",
    "epa_source_county_label": "Inyo County",
    "county_or_equivalent_display": "Inyo County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Inyo County",
    "census_2025_geoid": "06027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kern, CA",
    "epa_source_county_label": "Kern County",
    "county_or_equivalent_display": "Kern County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kern County",
    "census_2025_geoid": "06029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kings, CA",
    "epa_source_county_label": "Kings County",
    "county_or_equivalent_display": "Kings County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kings County",
    "census_2025_geoid": "06031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lake, CA",
    "epa_source_county_label": "Lake County",
    "county_or_equivalent_display": "Lake County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lake County",
    "census_2025_geoid": "06033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lassen, CA",
    "epa_source_county_label": "Lassen County",
    "county_or_equivalent_display": "Lassen County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lassen County",
    "census_2025_geoid": "06035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Los Angeles, CA",
    "epa_source_county_label": "Los Angeles County",
    "county_or_equivalent_display": "Los Angeles County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Los Angeles County",
    "census_2025_geoid": "06037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Madera, CA",
    "epa_source_county_label": "Madera County",
    "county_or_equivalent_display": "Madera County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Madera County",
    "census_2025_geoid": "06039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marin, CA",
    "epa_source_county_label": "Marin County",
    "county_or_equivalent_display": "Marin County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marin County",
    "census_2025_geoid": "06041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mariposa, CA",
    "epa_source_county_label": "Mariposa County",
    "county_or_equivalent_display": "Mariposa County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mariposa County",
    "census_2025_geoid": "06043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mendocino, CA",
    "epa_source_county_label": "Mendocino County",
    "county_or_equivalent_display": "Mendocino County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mendocino County",
    "census_2025_geoid": "06045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Merced, CA",
    "epa_source_county_label": "Merced County",
    "county_or_equivalent_display": "Merced County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Merced County",
    "census_2025_geoid": "06047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Modoc, CA",
    "epa_source_county_label": "Modoc County",
    "county_or_equivalent_display": "Modoc County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Modoc County",
    "census_2025_geoid": "06049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mono, CA",
    "epa_source_county_label": "Mono County",
    "county_or_equivalent_display": "Mono County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mono County",
    "census_2025_geoid": "06051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Monterey, CA",
    "epa_source_county_label": "Monterey County",
    "county_or_equivalent_display": "Monterey County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Monterey County",
    "census_2025_geoid": "06053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Napa, CA",
    "epa_source_county_label": "Napa County",
    "county_or_equivalent_display": "Napa County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Napa County",
    "census_2025_geoid": "06055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Nevada, CA",
    "epa_source_county_label": "Nevada County",
    "county_or_equivalent_display": "Nevada County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Nevada County",
    "census_2025_geoid": "06057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Orange, CA",
    "epa_source_county_label": "Orange County",
    "county_or_equivalent_display": "Orange County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Orange County",
    "census_2025_geoid": "06059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Placer, CA",
    "epa_source_county_label": "Placer County",
    "county_or_equivalent_display": "Placer County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Placer County",
    "census_2025_geoid": "06061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Plumas, CA",
    "epa_source_county_label": "Plumas County",
    "county_or_equivalent_display": "Plumas County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Plumas County",
    "census_2025_geoid": "06063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Riverside, CA",
    "epa_source_county_label": "Riverside County",
    "county_or_equivalent_display": "Riverside County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Riverside County",
    "census_2025_geoid": "06065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sacramento, CA",
    "epa_source_county_label": "Sacramento County",
    "county_or_equivalent_display": "Sacramento County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sacramento County",
    "census_2025_geoid": "06067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "San Benito, CA",
    "epa_source_county_label": "San Benito County",
    "county_or_equivalent_display": "San Benito County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "San Benito County",
    "census_2025_geoid": "06069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "San Bernardino, CA",
    "epa_source_county_label": "San Bernardino County",
    "county_or_equivalent_display": "San Bernardino County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "San Bernardino County",
    "census_2025_geoid": "06071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "San Diego, CA",
    "epa_source_county_label": "San Diego County",
    "county_or_equivalent_display": "San Diego County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "San Diego County",
    "census_2025_geoid": "06073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "San Francisco, CA",
    "epa_source_county_label": "San Francisco County",
    "county_or_equivalent_display": "San Francisco County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "San Francisco County",
    "census_2025_geoid": "06075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "San Joaquin, CA",
    "epa_source_county_label": "San Joaquin County",
    "county_or_equivalent_display": "San Joaquin County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "San Joaquin County",
    "census_2025_geoid": "06077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "San Luis Obispo, CA",
    "epa_source_county_label": "San Luis Obispo County",
    "county_or_equivalent_display": "San Luis Obispo County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "San Luis Obispo County",
    "census_2025_geoid": "06079",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "San Mateo, CA",
    "epa_source_county_label": "San Mateo County",
    "county_or_equivalent_display": "San Mateo County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "San Mateo County",
    "census_2025_geoid": "06081",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Santa Barbara, CA",
    "epa_source_county_label": "Santa Barbara County",
    "county_or_equivalent_display": "Santa Barbara County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Santa Barbara County",
    "census_2025_geoid": "06083",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Santa Clara, CA",
    "epa_source_county_label": "Santa Clara County",
    "county_or_equivalent_display": "Santa Clara County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Santa Clara County",
    "census_2025_geoid": "06085",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Santa Cruz, CA",
    "epa_source_county_label": "Santa Cruz County",
    "county_or_equivalent_display": "Santa Cruz County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Santa Cruz County",
    "census_2025_geoid": "06087",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Shasta, CA",
    "epa_source_county_label": "Shasta County",
    "county_or_equivalent_display": "Shasta County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Shasta County",
    "census_2025_geoid": "06089",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sierra, CA",
    "epa_source_county_label": "Sierra County",
    "county_or_equivalent_display": "Sierra County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sierra County",
    "census_2025_geoid": "06091",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Siskiyou, CA",
    "epa_source_county_label": "Siskiyou County",
    "county_or_equivalent_display": "Siskiyou County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Siskiyou County",
    "census_2025_geoid": "06093",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Solano, CA",
    "epa_source_county_label": "Solano County",
    "county_or_equivalent_display": "Solano County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Solano County",
    "census_2025_geoid": "06095",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sonoma, CA",
    "epa_source_county_label": "Sonoma County",
    "county_or_equivalent_display": "Sonoma County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sonoma County",
    "census_2025_geoid": "06097",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Stanislaus, CA",
    "epa_source_county_label": "Stanislaus County",
    "county_or_equivalent_display": "Stanislaus County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Stanislaus County",
    "census_2025_geoid": "06099",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sutter, CA",
    "epa_source_county_label": "Sutter County",
    "county_or_equivalent_display": "Sutter County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sutter County",
    "census_2025_geoid": "06101",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tehama, CA",
    "epa_source_county_label": "Tehama County",
    "county_or_equivalent_display": "Tehama County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tehama County",
    "census_2025_geoid": "06103",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Trinity, CA",
    "epa_source_county_label": "Trinity County",
    "county_or_equivalent_display": "Trinity County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Trinity County",
    "census_2025_geoid": "06105",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tulare, CA",
    "epa_source_county_label": "Tulare County",
    "county_or_equivalent_display": "Tulare County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tulare County",
    "census_2025_geoid": "06107",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tuolumne, CA",
    "epa_source_county_label": "Tuolumne County",
    "county_or_equivalent_display": "Tuolumne County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tuolumne County",
    "census_2025_geoid": "06109",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ventura, CA",
    "epa_source_county_label": "Ventura County",
    "county_or_equivalent_display": "Ventura County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ventura County",
    "census_2025_geoid": "06111",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Yolo, CA",
    "epa_source_county_label": "Yolo County",
    "county_or_equivalent_display": "Yolo County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Yolo County",
    "census_2025_geoid": "06113",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Yuba, CA",
    "epa_source_county_label": "Yuba County",
    "county_or_equivalent_display": "Yuba County",
    "state_name": "California",
    "state_abbreviation": "CA",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Yuba County",
    "census_2025_geoid": "06115",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Adams, CO",
    "epa_source_county_label": "Adams County",
    "county_or_equivalent_display": "Adams County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Adams County",
    "census_2025_geoid": "08001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Alamosa, CO",
    "epa_source_county_label": "Alamosa County",
    "county_or_equivalent_display": "Alamosa County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Alamosa County",
    "census_2025_geoid": "08003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Arapahoe, CO",
    "epa_source_county_label": "Arapahoe County",
    "county_or_equivalent_display": "Arapahoe County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Arapahoe County",
    "census_2025_geoid": "08005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Archuleta, CO",
    "epa_source_county_label": "Archuleta County",
    "county_or_equivalent_display": "Archuleta County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Archuleta County",
    "census_2025_geoid": "08007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Baca, CO",
    "epa_source_county_label": "Baca County",
    "county_or_equivalent_display": "Baca County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Baca County",
    "census_2025_geoid": "08009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bent, CO",
    "epa_source_county_label": "Bent County",
    "county_or_equivalent_display": "Bent County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bent County",
    "census_2025_geoid": "08011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Boulder, CO",
    "epa_source_county_label": "Boulder County",
    "county_or_equivalent_display": "Boulder County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Boulder County",
    "census_2025_geoid": "08013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Broomfield, CO",
    "epa_source_county_label": "Broomfield County",
    "county_or_equivalent_display": "Broomfield County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Broomfield County",
    "census_2025_geoid": "08014",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chaffee, CO",
    "epa_source_county_label": "Chaffee County",
    "county_or_equivalent_display": "Chaffee County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chaffee County",
    "census_2025_geoid": "08015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cheyenne, CO",
    "epa_source_county_label": "Cheyenne County",
    "county_or_equivalent_display": "Cheyenne County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cheyenne County",
    "census_2025_geoid": "08017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clear Creek, CO",
    "epa_source_county_label": "Clear Creek County",
    "county_or_equivalent_display": "Clear Creek County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clear Creek County",
    "census_2025_geoid": "08019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Conejos, CO",
    "epa_source_county_label": "Conejos County",
    "county_or_equivalent_display": "Conejos County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Conejos County",
    "census_2025_geoid": "08021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Costilla, CO",
    "epa_source_county_label": "Costilla County",
    "county_or_equivalent_display": "Costilla County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Costilla County",
    "census_2025_geoid": "08023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Crowley, CO",
    "epa_source_county_label": "Crowley County",
    "county_or_equivalent_display": "Crowley County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Crowley County",
    "census_2025_geoid": "08025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Custer, CO",
    "epa_source_county_label": "Custer County",
    "county_or_equivalent_display": "Custer County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Custer County",
    "census_2025_geoid": "08027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Delta, CO",
    "epa_source_county_label": "Delta County",
    "county_or_equivalent_display": "Delta County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Delta County",
    "census_2025_geoid": "08029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Denver, CO",
    "epa_source_county_label": "Denver County",
    "county_or_equivalent_display": "Denver County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Denver County",
    "census_2025_geoid": "08031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dolores, CO",
    "epa_source_county_label": "Dolores County",
    "county_or_equivalent_display": "Dolores County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dolores County",
    "census_2025_geoid": "08033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Douglas, CO",
    "epa_source_county_label": "Douglas County",
    "county_or_equivalent_display": "Douglas County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Douglas County",
    "census_2025_geoid": "08035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Eagle, CO",
    "epa_source_county_label": "Eagle County",
    "county_or_equivalent_display": "Eagle County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Eagle County",
    "census_2025_geoid": "08037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "El Paso, CO",
    "epa_source_county_label": "El Paso County",
    "county_or_equivalent_display": "El Paso County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "El Paso County",
    "census_2025_geoid": "08041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Elbert, CO",
    "epa_source_county_label": "Elbert County",
    "county_or_equivalent_display": "Elbert County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Elbert County",
    "census_2025_geoid": "08039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fremont, CO",
    "epa_source_county_label": "Fremont County",
    "county_or_equivalent_display": "Fremont County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fremont County",
    "census_2025_geoid": "08043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Garfield, CO",
    "epa_source_county_label": "Garfield County",
    "county_or_equivalent_display": "Garfield County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Garfield County",
    "census_2025_geoid": "08045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gilpin, CO",
    "epa_source_county_label": "Gilpin County",
    "county_or_equivalent_display": "Gilpin County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gilpin County",
    "census_2025_geoid": "08047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grand, CO",
    "epa_source_county_label": "Grand County",
    "county_or_equivalent_display": "Grand County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grand County",
    "census_2025_geoid": "08049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gunnison, CO",
    "epa_source_county_label": "Gunnison County",
    "county_or_equivalent_display": "Gunnison County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gunnison County",
    "census_2025_geoid": "08051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hinsdale, CO",
    "epa_source_county_label": "Hinsdale County",
    "county_or_equivalent_display": "Hinsdale County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hinsdale County",
    "census_2025_geoid": "08053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Huerfano, CO",
    "epa_source_county_label": "Huerfano County",
    "county_or_equivalent_display": "Huerfano County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Huerfano County",
    "census_2025_geoid": "08055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jackson, CO",
    "epa_source_county_label": "Jackson County",
    "county_or_equivalent_display": "Jackson County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jackson County",
    "census_2025_geoid": "08057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jefferson, CO",
    "epa_source_county_label": "Jefferson County",
    "county_or_equivalent_display": "Jefferson County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jefferson County",
    "census_2025_geoid": "08059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kiowa, CO",
    "epa_source_county_label": "Kiowa County",
    "county_or_equivalent_display": "Kiowa County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kiowa County",
    "census_2025_geoid": "08061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kit Carson, CO",
    "epa_source_county_label": "Kit Carson County",
    "county_or_equivalent_display": "Kit Carson County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kit Carson County",
    "census_2025_geoid": "08063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "La Plata, CO",
    "epa_source_county_label": "La Plata County",
    "county_or_equivalent_display": "La Plata County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "La Plata County",
    "census_2025_geoid": "08067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lake, CO",
    "epa_source_county_label": "Lake County",
    "county_or_equivalent_display": "Lake County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lake County",
    "census_2025_geoid": "08065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Larimer, CO",
    "epa_source_county_label": "Larimer County",
    "county_or_equivalent_display": "Larimer County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Larimer County",
    "census_2025_geoid": "08069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Las Animas, CO",
    "epa_source_county_label": "Las Animas County",
    "county_or_equivalent_display": "Las Animas County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Las Animas County",
    "census_2025_geoid": "08071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lincoln, CO",
    "epa_source_county_label": "Lincoln County",
    "county_or_equivalent_display": "Lincoln County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lincoln County",
    "census_2025_geoid": "08073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Logan, CO",
    "epa_source_county_label": "Logan County",
    "county_or_equivalent_display": "Logan County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Logan County",
    "census_2025_geoid": "08075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mesa, CO",
    "epa_source_county_label": "Mesa County",
    "county_or_equivalent_display": "Mesa County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mesa County",
    "census_2025_geoid": "08077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mineral, CO",
    "epa_source_county_label": "Mineral County",
    "county_or_equivalent_display": "Mineral County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mineral County",
    "census_2025_geoid": "08079",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Moffat, CO",
    "epa_source_county_label": "Moffat County",
    "county_or_equivalent_display": "Moffat County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Moffat County",
    "census_2025_geoid": "08081",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Montezuma, CO",
    "epa_source_county_label": "Montezuma County",
    "county_or_equivalent_display": "Montezuma County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Montezuma County",
    "census_2025_geoid": "08083",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Montrose, CO",
    "epa_source_county_label": "Montrose County",
    "county_or_equivalent_display": "Montrose County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Montrose County",
    "census_2025_geoid": "08085",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Morgan, CO",
    "epa_source_county_label": "Morgan County",
    "county_or_equivalent_display": "Morgan County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Morgan County",
    "census_2025_geoid": "08087",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Otero, CO",
    "epa_source_county_label": "Otero County",
    "county_or_equivalent_display": "Otero County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Otero County",
    "census_2025_geoid": "08089",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ouray, CO",
    "epa_source_county_label": "Ouray County",
    "county_or_equivalent_display": "Ouray County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ouray County",
    "census_2025_geoid": "08091",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Park, CO",
    "epa_source_county_label": "Park County",
    "county_or_equivalent_display": "Park County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Park County",
    "census_2025_geoid": "08093",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Phillips, CO",
    "epa_source_county_label": "Phillips County",
    "county_or_equivalent_display": "Phillips County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Phillips County",
    "census_2025_geoid": "08095",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pitkin, CO",
    "epa_source_county_label": "Pitkin County",
    "county_or_equivalent_display": "Pitkin County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pitkin County",
    "census_2025_geoid": "08097",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Prowers, CO",
    "epa_source_county_label": "Prowers County",
    "county_or_equivalent_display": "Prowers County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Prowers County",
    "census_2025_geoid": "08099",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pueblo, CO",
    "epa_source_county_label": "Pueblo County",
    "county_or_equivalent_display": "Pueblo County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pueblo County",
    "census_2025_geoid": "08101",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rio Blanco, CO",
    "epa_source_county_label": "Rio Blanco County",
    "county_or_equivalent_display": "Rio Blanco County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rio Blanco County",
    "census_2025_geoid": "08103",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rio Grande, CO",
    "epa_source_county_label": "Rio Grande County",
    "county_or_equivalent_display": "Rio Grande County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rio Grande County",
    "census_2025_geoid": "08105",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Routt, CO",
    "epa_source_county_label": "Routt County",
    "county_or_equivalent_display": "Routt County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Routt County",
    "census_2025_geoid": "08107",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Saguache, CO",
    "epa_source_county_label": "Saguache County",
    "county_or_equivalent_display": "Saguache County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Saguache County",
    "census_2025_geoid": "08109",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "San Juan, CO",
    "epa_source_county_label": "San Juan County",
    "county_or_equivalent_display": "San Juan County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "San Juan County",
    "census_2025_geoid": "08111",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "San Miguel, CO",
    "epa_source_county_label": "San Miguel County",
    "county_or_equivalent_display": "San Miguel County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "San Miguel County",
    "census_2025_geoid": "08113",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sedgwick, CO",
    "epa_source_county_label": "Sedgwick County",
    "county_or_equivalent_display": "Sedgwick County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sedgwick County",
    "census_2025_geoid": "08115",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Summit, CO",
    "epa_source_county_label": "Summit County",
    "county_or_equivalent_display": "Summit County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Summit County",
    "census_2025_geoid": "08117",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Teller, CO",
    "epa_source_county_label": "Teller County",
    "county_or_equivalent_display": "Teller County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Teller County",
    "census_2025_geoid": "08119",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washington, CO",
    "epa_source_county_label": "Washington County",
    "county_or_equivalent_display": "Washington County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washington County",
    "census_2025_geoid": "08121",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Weld, CO",
    "epa_source_county_label": "Weld County",
    "county_or_equivalent_display": "Weld County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Weld County",
    "census_2025_geoid": "08123",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Yuma, CO",
    "epa_source_county_label": "Yuma County",
    "county_or_equivalent_display": "Yuma County",
    "state_name": "Colorado",
    "state_abbreviation": "CO",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Yuma County",
    "census_2025_geoid": "08125",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fairfield, CT",
    "epa_source_county_label": "Fairfield County",
    "county_or_equivalent_display": "Fairfield County",
    "state_name": "Connecticut",
    "state_abbreviation": "CT",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "legacy_or_unmatched",
    "census_2025_county_or_equivalent_name": "",
    "census_2025_geoid": "",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; current Census geography match intentionally left unresolved.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "EPA source geography has no direct name match in the 2025 Census file; no current GEOID was assigned and no zone was silently reallocated."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hartford, CT",
    "epa_source_county_label": "Hartford County",
    "county_or_equivalent_display": "Hartford County",
    "state_name": "Connecticut",
    "state_abbreviation": "CT",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "legacy_or_unmatched",
    "census_2025_county_or_equivalent_name": "",
    "census_2025_geoid": "",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; current Census geography match intentionally left unresolved.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "EPA source geography has no direct name match in the 2025 Census file; no current GEOID was assigned and no zone was silently reallocated."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Litchfield, CT",
    "epa_source_county_label": "Litchfield County",
    "county_or_equivalent_display": "Litchfield County",
    "state_name": "Connecticut",
    "state_abbreviation": "CT",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "legacy_or_unmatched",
    "census_2025_county_or_equivalent_name": "",
    "census_2025_geoid": "",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; current Census geography match intentionally left unresolved.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "EPA source geography has no direct name match in the 2025 Census file; no current GEOID was assigned and no zone was silently reallocated."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Middlesex, CT",
    "epa_source_county_label": "Middlesex County",
    "county_or_equivalent_display": "Middlesex County",
    "state_name": "Connecticut",
    "state_abbreviation": "CT",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "legacy_or_unmatched",
    "census_2025_county_or_equivalent_name": "",
    "census_2025_geoid": "",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; current Census geography match intentionally left unresolved.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "EPA source geography has no direct name match in the 2025 Census file; no current GEOID was assigned and no zone was silently reallocated."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "New Haven, CT",
    "epa_source_county_label": "New Haven County",
    "county_or_equivalent_display": "New Haven County",
    "state_name": "Connecticut",
    "state_abbreviation": "CT",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "legacy_or_unmatched",
    "census_2025_county_or_equivalent_name": "",
    "census_2025_geoid": "",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; current Census geography match intentionally left unresolved.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "EPA source geography has no direct name match in the 2025 Census file; no current GEOID was assigned and no zone was silently reallocated."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "New London, CT",
    "epa_source_county_label": "New London County",
    "county_or_equivalent_display": "New London County",
    "state_name": "Connecticut",
    "state_abbreviation": "CT",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "legacy_or_unmatched",
    "census_2025_county_or_equivalent_name": "",
    "census_2025_geoid": "",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; current Census geography match intentionally left unresolved.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "EPA source geography has no direct name match in the 2025 Census file; no current GEOID was assigned and no zone was silently reallocated."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tolland, CT",
    "epa_source_county_label": "Tolland County",
    "county_or_equivalent_display": "Tolland County",
    "state_name": "Connecticut",
    "state_abbreviation": "CT",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "legacy_or_unmatched",
    "census_2025_county_or_equivalent_name": "",
    "census_2025_geoid": "",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; current Census geography match intentionally left unresolved.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "EPA source geography has no direct name match in the 2025 Census file; no current GEOID was assigned and no zone was silently reallocated."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Windham, CT",
    "epa_source_county_label": "Windham County",
    "county_or_equivalent_display": "Windham County",
    "state_name": "Connecticut",
    "state_abbreviation": "CT",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "legacy_or_unmatched",
    "census_2025_county_or_equivalent_name": "",
    "census_2025_geoid": "",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; current Census geography match intentionally left unresolved.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "EPA source geography has no direct name match in the 2025 Census file; no current GEOID was assigned and no zone was silently reallocated."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kent, DE",
    "epa_source_county_label": "Kent County",
    "county_or_equivalent_display": "Kent County",
    "state_name": "Delaware",
    "state_abbreviation": "DE",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kent County",
    "census_2025_geoid": "10001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "New Castle, DE",
    "epa_source_county_label": "New Castle County",
    "county_or_equivalent_display": "New Castle County",
    "state_name": "Delaware",
    "state_abbreviation": "DE",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "New Castle County",
    "census_2025_geoid": "10003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sussex, DE",
    "epa_source_county_label": "Sussex County",
    "county_or_equivalent_display": "Sussex County",
    "state_name": "Delaware",
    "state_abbreviation": "DE",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sussex County",
    "census_2025_geoid": "10005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "District of Columbia",
    "epa_source_county_label": "District of Columbia",
    "county_or_equivalent_display": "District of Columbia",
    "state_name": "District of Columbia",
    "state_abbreviation": "DC",
    "geography_type": "federal district / county equivalent",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "District of Columbia",
    "census_2025_geoid": "11001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Alachua, FL",
    "epa_source_county_label": "Alachua County",
    "county_or_equivalent_display": "Alachua County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Alachua County",
    "census_2025_geoid": "12001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Baker, FL",
    "epa_source_county_label": "Baker County",
    "county_or_equivalent_display": "Baker County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Baker County",
    "census_2025_geoid": "12003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bay, FL",
    "epa_source_county_label": "Bay County",
    "county_or_equivalent_display": "Bay County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bay County",
    "census_2025_geoid": "12005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bradford, FL",
    "epa_source_county_label": "Bradford County",
    "county_or_equivalent_display": "Bradford County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bradford County",
    "census_2025_geoid": "12007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Brevard, FL",
    "epa_source_county_label": "Brevard County",
    "county_or_equivalent_display": "Brevard County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Brevard County",
    "census_2025_geoid": "12009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Broward, FL",
    "epa_source_county_label": "Broward County",
    "county_or_equivalent_display": "Broward County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Broward County",
    "census_2025_geoid": "12011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Calhoun, FL",
    "epa_source_county_label": "Calhoun County",
    "county_or_equivalent_display": "Calhoun County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Calhoun County",
    "census_2025_geoid": "12013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Charlotte, FL",
    "epa_source_county_label": "Charlotte County",
    "county_or_equivalent_display": "Charlotte County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Charlotte County",
    "census_2025_geoid": "12015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Citrus, FL",
    "epa_source_county_label": "Citrus County",
    "county_or_equivalent_display": "Citrus County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Citrus County",
    "census_2025_geoid": "12017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clay, FL",
    "epa_source_county_label": "Clay County",
    "county_or_equivalent_display": "Clay County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clay County",
    "census_2025_geoid": "12019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Collier, FL",
    "epa_source_county_label": "Collier County",
    "county_or_equivalent_display": "Collier County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Collier County",
    "census_2025_geoid": "12021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Columbia, FL",
    "epa_source_county_label": "Columbia County",
    "county_or_equivalent_display": "Columbia County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Columbia County",
    "census_2025_geoid": "12023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "De Soto, FL",
    "epa_source_county_label": "DeSoto County",
    "county_or_equivalent_display": "DeSoto County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "DeSoto County",
    "census_2025_geoid": "12027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dixie, FL",
    "epa_source_county_label": "Dixie County",
    "county_or_equivalent_display": "Dixie County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dixie County",
    "census_2025_geoid": "12029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Duval, FL",
    "epa_source_county_label": "Duval County",
    "county_or_equivalent_display": "Duval County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Duval County",
    "census_2025_geoid": "12031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Escambia, FL",
    "epa_source_county_label": "Escambia County",
    "county_or_equivalent_display": "Escambia County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Escambia County",
    "census_2025_geoid": "12033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Flagler, FL",
    "epa_source_county_label": "Flagler County",
    "county_or_equivalent_display": "Flagler County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Flagler County",
    "census_2025_geoid": "12035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Franklin, FL",
    "epa_source_county_label": "Franklin County",
    "county_or_equivalent_display": "Franklin County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Franklin County",
    "census_2025_geoid": "12037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gadsden, FL",
    "epa_source_county_label": "Gadsden County",
    "county_or_equivalent_display": "Gadsden County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gadsden County",
    "census_2025_geoid": "12039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gilchrist, FL",
    "epa_source_county_label": "Gilchrist County",
    "county_or_equivalent_display": "Gilchrist County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gilchrist County",
    "census_2025_geoid": "12041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Glades, FL",
    "epa_source_county_label": "Glades County",
    "county_or_equivalent_display": "Glades County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Glades County",
    "census_2025_geoid": "12043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gulf, FL",
    "epa_source_county_label": "Gulf County",
    "county_or_equivalent_display": "Gulf County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gulf County",
    "census_2025_geoid": "12045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hamilton, FL",
    "epa_source_county_label": "Hamilton County",
    "county_or_equivalent_display": "Hamilton County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hamilton County",
    "census_2025_geoid": "12047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hardee, FL",
    "epa_source_county_label": "Hardee County",
    "county_or_equivalent_display": "Hardee County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hardee County",
    "census_2025_geoid": "12049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hendry, FL",
    "epa_source_county_label": "Hendry County",
    "county_or_equivalent_display": "Hendry County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hendry County",
    "census_2025_geoid": "12051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hernando, FL",
    "epa_source_county_label": "Hernando County",
    "county_or_equivalent_display": "Hernando County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hernando County",
    "census_2025_geoid": "12053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Highlands, FL",
    "epa_source_county_label": "Highlands County",
    "county_or_equivalent_display": "Highlands County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Highlands County",
    "census_2025_geoid": "12055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hillsborough, FL",
    "epa_source_county_label": "Hillsborough County",
    "county_or_equivalent_display": "Hillsborough County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hillsborough County",
    "census_2025_geoid": "12057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Holmes, FL",
    "epa_source_county_label": "Holmes County",
    "county_or_equivalent_display": "Holmes County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Holmes County",
    "census_2025_geoid": "12059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Indian River, FL",
    "epa_source_county_label": "Indian River County",
    "county_or_equivalent_display": "Indian River County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Indian River County",
    "census_2025_geoid": "12061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jackson, FL",
    "epa_source_county_label": "Jackson County",
    "county_or_equivalent_display": "Jackson County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jackson County",
    "census_2025_geoid": "12063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jefferson, FL",
    "epa_source_county_label": "Jefferson County",
    "county_or_equivalent_display": "Jefferson County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jefferson County",
    "census_2025_geoid": "12065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lafayette, FL",
    "epa_source_county_label": "Lafayette County",
    "county_or_equivalent_display": "Lafayette County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lafayette County",
    "census_2025_geoid": "12067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lake, FL",
    "epa_source_county_label": "Lake County",
    "county_or_equivalent_display": "Lake County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lake County",
    "census_2025_geoid": "12069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lee, FL",
    "epa_source_county_label": "Lee County",
    "county_or_equivalent_display": "Lee County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lee County",
    "census_2025_geoid": "12071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Leon, FL",
    "epa_source_county_label": "Leon County",
    "county_or_equivalent_display": "Leon County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Leon County",
    "census_2025_geoid": "12073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Levy, FL",
    "epa_source_county_label": "Levy County",
    "county_or_equivalent_display": "Levy County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Levy County",
    "census_2025_geoid": "12075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Liberty, FL",
    "epa_source_county_label": "Liberty County",
    "county_or_equivalent_display": "Liberty County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Liberty County",
    "census_2025_geoid": "12077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Madison, FL",
    "epa_source_county_label": "Madison County",
    "county_or_equivalent_display": "Madison County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Madison County",
    "census_2025_geoid": "12079",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Manatee, FL",
    "epa_source_county_label": "Manatee County",
    "county_or_equivalent_display": "Manatee County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Manatee County",
    "census_2025_geoid": "12081",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marion, FL",
    "epa_source_county_label": "Marion County",
    "county_or_equivalent_display": "Marion County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marion County",
    "census_2025_geoid": "12083",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Martin, FL",
    "epa_source_county_label": "Martin County",
    "county_or_equivalent_display": "Martin County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Martin County",
    "census_2025_geoid": "12085",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Miami-Dade, FL",
    "epa_source_county_label": "Miami-Dade County",
    "county_or_equivalent_display": "Miami-Dade County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Miami-Dade County",
    "census_2025_geoid": "12086",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Monroe, FL",
    "epa_source_county_label": "Monroe County",
    "county_or_equivalent_display": "Monroe County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Monroe County",
    "census_2025_geoid": "12087",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Nassau, FL",
    "epa_source_county_label": "Nassau County",
    "county_or_equivalent_display": "Nassau County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Nassau County",
    "census_2025_geoid": "12089",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Okaloosa, FL",
    "epa_source_county_label": "Okaloosa County",
    "county_or_equivalent_display": "Okaloosa County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Okaloosa County",
    "census_2025_geoid": "12091",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Okeechobee, FL",
    "epa_source_county_label": "Okeechobee County",
    "county_or_equivalent_display": "Okeechobee County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Okeechobee County",
    "census_2025_geoid": "12093",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Orange, FL",
    "epa_source_county_label": "Orange County",
    "county_or_equivalent_display": "Orange County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Orange County",
    "census_2025_geoid": "12095",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Osceola, FL",
    "epa_source_county_label": "Osceola County",
    "county_or_equivalent_display": "Osceola County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Osceola County",
    "census_2025_geoid": "12097",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Palm Beach, FL",
    "epa_source_county_label": "Palm Beach County",
    "county_or_equivalent_display": "Palm Beach County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Palm Beach County",
    "census_2025_geoid": "12099",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pasco, FL",
    "epa_source_county_label": "Pasco County",
    "county_or_equivalent_display": "Pasco County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pasco County",
    "census_2025_geoid": "12101",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pinellas, FL",
    "epa_source_county_label": "Pinellas County",
    "county_or_equivalent_display": "Pinellas County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pinellas County",
    "census_2025_geoid": "12103",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Polk, FL",
    "epa_source_county_label": "Polk County",
    "county_or_equivalent_display": "Polk County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Polk County",
    "census_2025_geoid": "12105",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Putnam, FL",
    "epa_source_county_label": "Putnam County",
    "county_or_equivalent_display": "Putnam County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Putnam County",
    "census_2025_geoid": "12107",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Santa Rosa, FL",
    "epa_source_county_label": "Santa Rosa County",
    "county_or_equivalent_display": "Santa Rosa County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Santa Rosa County",
    "census_2025_geoid": "12113",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sarasota, FL",
    "epa_source_county_label": "Sarasota County",
    "county_or_equivalent_display": "Sarasota County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sarasota County",
    "census_2025_geoid": "12115",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Seminole, FL",
    "epa_source_county_label": "Seminole County",
    "county_or_equivalent_display": "Seminole County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Seminole County",
    "census_2025_geoid": "12117",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "St. Johns, FL",
    "epa_source_county_label": "St. Johns County",
    "county_or_equivalent_display": "St. Johns County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "St. Johns County",
    "census_2025_geoid": "12109",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "St. Lucie, FL",
    "epa_source_county_label": "St. Lucie County",
    "county_or_equivalent_display": "St. Lucie County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "St. Lucie County",
    "census_2025_geoid": "12111",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sumter, FL",
    "epa_source_county_label": "Sumter County",
    "county_or_equivalent_display": "Sumter County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sumter County",
    "census_2025_geoid": "12119",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Suwannee, FL",
    "epa_source_county_label": "Suwannee County",
    "county_or_equivalent_display": "Suwannee County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Suwannee County",
    "census_2025_geoid": "12121",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Taylor, FL",
    "epa_source_county_label": "Taylor County",
    "county_or_equivalent_display": "Taylor County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Taylor County",
    "census_2025_geoid": "12123",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Union, FL",
    "epa_source_county_label": "Union County",
    "county_or_equivalent_display": "Union County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Union County",
    "census_2025_geoid": "12125",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Volusia, FL",
    "epa_source_county_label": "Volusia County",
    "county_or_equivalent_display": "Volusia County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Volusia County",
    "census_2025_geoid": "12127",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wakulla, FL",
    "epa_source_county_label": "Wakulla County",
    "county_or_equivalent_display": "Wakulla County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wakulla County",
    "census_2025_geoid": "12129",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Walton, FL",
    "epa_source_county_label": "Walton County",
    "county_or_equivalent_display": "Walton County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Walton County",
    "census_2025_geoid": "12131",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washington, FL",
    "epa_source_county_label": "Washington County",
    "county_or_equivalent_display": "Washington County",
    "state_name": "Florida",
    "state_abbreviation": "FL",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washington County",
    "census_2025_geoid": "12133",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Appling, GA",
    "epa_source_county_label": "Appling County",
    "county_or_equivalent_display": "Appling County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Appling County",
    "census_2025_geoid": "13001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Atkinson, GA",
    "epa_source_county_label": "Atkinson County",
    "county_or_equivalent_display": "Atkinson County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Atkinson County",
    "census_2025_geoid": "13003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bacon, GA",
    "epa_source_county_label": "Bacon County",
    "county_or_equivalent_display": "Bacon County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bacon County",
    "census_2025_geoid": "13005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Baker, GA",
    "epa_source_county_label": "Baker County",
    "county_or_equivalent_display": "Baker County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Baker County",
    "census_2025_geoid": "13007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Baldwin, GA",
    "epa_source_county_label": "Baldwin County",
    "county_or_equivalent_display": "Baldwin County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Baldwin County",
    "census_2025_geoid": "13009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Banks, GA",
    "epa_source_county_label": "Banks County",
    "county_or_equivalent_display": "Banks County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Banks County",
    "census_2025_geoid": "13011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Barrow, GA",
    "epa_source_county_label": "Barrow County",
    "county_or_equivalent_display": "Barrow County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Barrow County",
    "census_2025_geoid": "13013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bartow, GA",
    "epa_source_county_label": "Bartow County",
    "county_or_equivalent_display": "Bartow County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bartow County",
    "census_2025_geoid": "13015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ben Hill, GA",
    "epa_source_county_label": "Ben Hill County",
    "county_or_equivalent_display": "Ben Hill County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ben Hill County",
    "census_2025_geoid": "13017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Berrien, GA",
    "epa_source_county_label": "Berrien County",
    "county_or_equivalent_display": "Berrien County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Berrien County",
    "census_2025_geoid": "13019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bibb, GA",
    "epa_source_county_label": "Bibb County",
    "county_or_equivalent_display": "Bibb County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bibb County",
    "census_2025_geoid": "13021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bleckley, GA",
    "epa_source_county_label": "Bleckley County",
    "county_or_equivalent_display": "Bleckley County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bleckley County",
    "census_2025_geoid": "13023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Brantley, GA",
    "epa_source_county_label": "Brantley County",
    "county_or_equivalent_display": "Brantley County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Brantley County",
    "census_2025_geoid": "13025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Brooks, GA",
    "epa_source_county_label": "Brooks County",
    "county_or_equivalent_display": "Brooks County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Brooks County",
    "census_2025_geoid": "13027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bryan, GA",
    "epa_source_county_label": "Bryan County",
    "county_or_equivalent_display": "Bryan County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bryan County",
    "census_2025_geoid": "13029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bulloch, GA",
    "epa_source_county_label": "Bulloch County",
    "county_or_equivalent_display": "Bulloch County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bulloch County",
    "census_2025_geoid": "13031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Burke, GA",
    "epa_source_county_label": "Burke County",
    "county_or_equivalent_display": "Burke County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Burke County",
    "census_2025_geoid": "13033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Butts, GA",
    "epa_source_county_label": "Butts County",
    "county_or_equivalent_display": "Butts County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Butts County",
    "census_2025_geoid": "13035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Calhoun, GA",
    "epa_source_county_label": "Calhoun County",
    "county_or_equivalent_display": "Calhoun County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Calhoun County",
    "census_2025_geoid": "13037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Camden, GA",
    "epa_source_county_label": "Camden County",
    "county_or_equivalent_display": "Camden County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Camden County",
    "census_2025_geoid": "13039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Candler, GA",
    "epa_source_county_label": "Candler County",
    "county_or_equivalent_display": "Candler County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Candler County",
    "census_2025_geoid": "13043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Carroll, GA",
    "epa_source_county_label": "Carroll County",
    "county_or_equivalent_display": "Carroll County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Carroll County",
    "census_2025_geoid": "13045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Catoosa, GA",
    "epa_source_county_label": "Catoosa County",
    "county_or_equivalent_display": "Catoosa County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Catoosa County",
    "census_2025_geoid": "13047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Charlton, GA",
    "epa_source_county_label": "Charlton County",
    "county_or_equivalent_display": "Charlton County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Charlton County",
    "census_2025_geoid": "13049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chatham, GA",
    "epa_source_county_label": "Chatham County",
    "county_or_equivalent_display": "Chatham County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chatham County",
    "census_2025_geoid": "13051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chattahoochee, GA",
    "epa_source_county_label": "Chattahoochee County",
    "county_or_equivalent_display": "Chattahoochee County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chattahoochee County",
    "census_2025_geoid": "13053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chattooga, GA",
    "epa_source_county_label": "Chattooga County",
    "county_or_equivalent_display": "Chattooga County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chattooga County",
    "census_2025_geoid": "13055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cherokee, GA",
    "epa_source_county_label": "Cherokee County",
    "county_or_equivalent_display": "Cherokee County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cherokee County",
    "census_2025_geoid": "13057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clarke, GA",
    "epa_source_county_label": "Clarke County",
    "county_or_equivalent_display": "Clarke County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clarke County",
    "census_2025_geoid": "13059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clay, GA",
    "epa_source_county_label": "Clay County",
    "county_or_equivalent_display": "Clay County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clay County",
    "census_2025_geoid": "13061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clayton, GA",
    "epa_source_county_label": "Clayton County",
    "county_or_equivalent_display": "Clayton County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clayton County",
    "census_2025_geoid": "13063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clinch, GA",
    "epa_source_county_label": "Clinch County",
    "county_or_equivalent_display": "Clinch County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clinch County",
    "census_2025_geoid": "13065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cobb, GA",
    "epa_source_county_label": "Cobb County",
    "county_or_equivalent_display": "Cobb County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cobb County",
    "census_2025_geoid": "13067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Coffee, GA",
    "epa_source_county_label": "Coffee County",
    "county_or_equivalent_display": "Coffee County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Coffee County",
    "census_2025_geoid": "13069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Colquitt, GA",
    "epa_source_county_label": "Colquitt County",
    "county_or_equivalent_display": "Colquitt County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Colquitt County",
    "census_2025_geoid": "13071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Columbia, GA",
    "epa_source_county_label": "Columbia County",
    "county_or_equivalent_display": "Columbia County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Columbia County",
    "census_2025_geoid": "13073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cook, GA",
    "epa_source_county_label": "Cook County",
    "county_or_equivalent_display": "Cook County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cook County",
    "census_2025_geoid": "13075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Coweta, GA",
    "epa_source_county_label": "Coweta County",
    "county_or_equivalent_display": "Coweta County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Coweta County",
    "census_2025_geoid": "13077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Crawford, GA",
    "epa_source_county_label": "Crawford County",
    "county_or_equivalent_display": "Crawford County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Crawford County",
    "census_2025_geoid": "13079",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Crisp, GA",
    "epa_source_county_label": "Crisp County",
    "county_or_equivalent_display": "Crisp County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Crisp County",
    "census_2025_geoid": "13081",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dade, GA",
    "epa_source_county_label": "Dade County",
    "county_or_equivalent_display": "Dade County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dade County",
    "census_2025_geoid": "13083",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dawson, GA",
    "epa_source_county_label": "Dawson County",
    "county_or_equivalent_display": "Dawson County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dawson County",
    "census_2025_geoid": "13085",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "De Kalb, GA",
    "epa_source_county_label": "DeKalb County",
    "county_or_equivalent_display": "DeKalb County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "DeKalb County",
    "census_2025_geoid": "13089",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Decatur, GA",
    "epa_source_county_label": "Decatur County",
    "county_or_equivalent_display": "Decatur County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Decatur County",
    "census_2025_geoid": "13087",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dodge, GA",
    "epa_source_county_label": "Dodge County",
    "county_or_equivalent_display": "Dodge County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dodge County",
    "census_2025_geoid": "13091",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dooly, GA",
    "epa_source_county_label": "Dooly County",
    "county_or_equivalent_display": "Dooly County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dooly County",
    "census_2025_geoid": "13093",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dougherty, GA",
    "epa_source_county_label": "Dougherty County",
    "county_or_equivalent_display": "Dougherty County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dougherty County",
    "census_2025_geoid": "13095",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Douglas, GA",
    "epa_source_county_label": "Douglas County",
    "county_or_equivalent_display": "Douglas County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Douglas County",
    "census_2025_geoid": "13097",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Early, GA",
    "epa_source_county_label": "Early County",
    "county_or_equivalent_display": "Early County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Early County",
    "census_2025_geoid": "13099",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Echols, GA",
    "epa_source_county_label": "Echols County",
    "county_or_equivalent_display": "Echols County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Echols County",
    "census_2025_geoid": "13101",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Effingham, GA",
    "epa_source_county_label": "Effingham County",
    "county_or_equivalent_display": "Effingham County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Effingham County",
    "census_2025_geoid": "13103",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Elbert, GA",
    "epa_source_county_label": "Elbert County",
    "county_or_equivalent_display": "Elbert County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Elbert County",
    "census_2025_geoid": "13105",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Emanuel, GA",
    "epa_source_county_label": "Emanuel County",
    "county_or_equivalent_display": "Emanuel County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Emanuel County",
    "census_2025_geoid": "13107",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Evans, GA",
    "epa_source_county_label": "Evans County",
    "county_or_equivalent_display": "Evans County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Evans County",
    "census_2025_geoid": "13109",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fannin, GA",
    "epa_source_county_label": "Fannin County",
    "county_or_equivalent_display": "Fannin County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fannin County",
    "census_2025_geoid": "13111",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fayette, GA",
    "epa_source_county_label": "Fayette County",
    "county_or_equivalent_display": "Fayette County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fayette County",
    "census_2025_geoid": "13113",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Floyd, GA",
    "epa_source_county_label": "Floyd County",
    "county_or_equivalent_display": "Floyd County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Floyd County",
    "census_2025_geoid": "13115",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Forsyth, GA",
    "epa_source_county_label": "Forsyth County",
    "county_or_equivalent_display": "Forsyth County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Forsyth County",
    "census_2025_geoid": "13117",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Franklin, GA",
    "epa_source_county_label": "Franklin County",
    "county_or_equivalent_display": "Franklin County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Franklin County",
    "census_2025_geoid": "13119",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fulton, GA",
    "epa_source_county_label": "Fulton County",
    "county_or_equivalent_display": "Fulton County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fulton County",
    "census_2025_geoid": "13121",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gilmer, GA",
    "epa_source_county_label": "Gilmer County",
    "county_or_equivalent_display": "Gilmer County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gilmer County",
    "census_2025_geoid": "13123",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Glascock, GA",
    "epa_source_county_label": "Glascock County",
    "county_or_equivalent_display": "Glascock County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Glascock County",
    "census_2025_geoid": "13125",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Glynn, GA",
    "epa_source_county_label": "Glynn County",
    "county_or_equivalent_display": "Glynn County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Glynn County",
    "census_2025_geoid": "13127",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gordon, GA",
    "epa_source_county_label": "Gordon County",
    "county_or_equivalent_display": "Gordon County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gordon County",
    "census_2025_geoid": "13129",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grady, GA",
    "epa_source_county_label": "Grady County",
    "county_or_equivalent_display": "Grady County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grady County",
    "census_2025_geoid": "13131",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Greene, GA",
    "epa_source_county_label": "Greene County",
    "county_or_equivalent_display": "Greene County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Greene County",
    "census_2025_geoid": "13133",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gwinnett, GA",
    "epa_source_county_label": "Gwinnett County",
    "county_or_equivalent_display": "Gwinnett County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gwinnett County",
    "census_2025_geoid": "13135",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Habersham, GA",
    "epa_source_county_label": "Habersham County",
    "county_or_equivalent_display": "Habersham County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Habersham County",
    "census_2025_geoid": "13137",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hall, GA",
    "epa_source_county_label": "Hall County",
    "county_or_equivalent_display": "Hall County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hall County",
    "census_2025_geoid": "13139",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hancock, GA",
    "epa_source_county_label": "Hancock County",
    "county_or_equivalent_display": "Hancock County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hancock County",
    "census_2025_geoid": "13141",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Haralson, GA",
    "epa_source_county_label": "Haralson County",
    "county_or_equivalent_display": "Haralson County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Haralson County",
    "census_2025_geoid": "13143",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Harris, GA",
    "epa_source_county_label": "Harris County",
    "county_or_equivalent_display": "Harris County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Harris County",
    "census_2025_geoid": "13145",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hart, GA",
    "epa_source_county_label": "Hart County",
    "county_or_equivalent_display": "Hart County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hart County",
    "census_2025_geoid": "13147",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Heard, GA",
    "epa_source_county_label": "Heard County",
    "county_or_equivalent_display": "Heard County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Heard County",
    "census_2025_geoid": "13149",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Henry, GA",
    "epa_source_county_label": "Henry County",
    "county_or_equivalent_display": "Henry County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Henry County",
    "census_2025_geoid": "13151",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Houston, GA",
    "epa_source_county_label": "Houston County",
    "county_or_equivalent_display": "Houston County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Houston County",
    "census_2025_geoid": "13153",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Irwin, GA",
    "epa_source_county_label": "Irwin County",
    "county_or_equivalent_display": "Irwin County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Irwin County",
    "census_2025_geoid": "13155",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jackson, GA",
    "epa_source_county_label": "Jackson County",
    "county_or_equivalent_display": "Jackson County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jackson County",
    "census_2025_geoid": "13157",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jasper, GA",
    "epa_source_county_label": "Jasper County",
    "county_or_equivalent_display": "Jasper County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jasper County",
    "census_2025_geoid": "13159",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jeff Davis, GA",
    "epa_source_county_label": "Jeff Davis County",
    "county_or_equivalent_display": "Jeff Davis County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jeff Davis County",
    "census_2025_geoid": "13161",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jefferson, GA",
    "epa_source_county_label": "Jefferson County",
    "county_or_equivalent_display": "Jefferson County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jefferson County",
    "census_2025_geoid": "13163",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jenkins, GA",
    "epa_source_county_label": "Jenkins County",
    "county_or_equivalent_display": "Jenkins County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jenkins County",
    "census_2025_geoid": "13165",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Johnson, GA",
    "epa_source_county_label": "Johnson County",
    "county_or_equivalent_display": "Johnson County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Johnson County",
    "census_2025_geoid": "13167",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jones, GA",
    "epa_source_county_label": "Jones County",
    "county_or_equivalent_display": "Jones County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jones County",
    "census_2025_geoid": "13169",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lamar, GA",
    "epa_source_county_label": "Lamar County",
    "county_or_equivalent_display": "Lamar County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lamar County",
    "census_2025_geoid": "13171",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lanier, GA",
    "epa_source_county_label": "Lanier County",
    "county_or_equivalent_display": "Lanier County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lanier County",
    "census_2025_geoid": "13173",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Laurens, GA",
    "epa_source_county_label": "Laurens County",
    "county_or_equivalent_display": "Laurens County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Laurens County",
    "census_2025_geoid": "13175",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lee, GA",
    "epa_source_county_label": "Lee County",
    "county_or_equivalent_display": "Lee County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lee County",
    "census_2025_geoid": "13177",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Liberty, GA",
    "epa_source_county_label": "Liberty County",
    "county_or_equivalent_display": "Liberty County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Liberty County",
    "census_2025_geoid": "13179",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lincoln, GA",
    "epa_source_county_label": "Lincoln County",
    "county_or_equivalent_display": "Lincoln County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lincoln County",
    "census_2025_geoid": "13181",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Long, GA",
    "epa_source_county_label": "Long County",
    "county_or_equivalent_display": "Long County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Long County",
    "census_2025_geoid": "13183",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lowndes, GA",
    "epa_source_county_label": "Lowndes County",
    "county_or_equivalent_display": "Lowndes County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lowndes County",
    "census_2025_geoid": "13185",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lumpkin, GA",
    "epa_source_county_label": "Lumpkin County",
    "county_or_equivalent_display": "Lumpkin County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lumpkin County",
    "census_2025_geoid": "13187",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Macon, GA",
    "epa_source_county_label": "Macon County",
    "county_or_equivalent_display": "Macon County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Macon County",
    "census_2025_geoid": "13193",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Madison, GA",
    "epa_source_county_label": "Madison County",
    "county_or_equivalent_display": "Madison County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Madison County",
    "census_2025_geoid": "13195",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marion, GA",
    "epa_source_county_label": "Marion County",
    "county_or_equivalent_display": "Marion County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marion County",
    "census_2025_geoid": "13197",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "McDuffie, GA",
    "epa_source_county_label": "McDuffie County",
    "county_or_equivalent_display": "McDuffie County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "McDuffie County",
    "census_2025_geoid": "13189",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "McIntosh, GA",
    "epa_source_county_label": "McIntosh County",
    "county_or_equivalent_display": "McIntosh County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "McIntosh County",
    "census_2025_geoid": "13191",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Meriwether, GA",
    "epa_source_county_label": "Meriwether County",
    "county_or_equivalent_display": "Meriwether County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Meriwether County",
    "census_2025_geoid": "13199",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Miller, GA",
    "epa_source_county_label": "Miller County",
    "county_or_equivalent_display": "Miller County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Miller County",
    "census_2025_geoid": "13201",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mitchell, GA",
    "epa_source_county_label": "Mitchell County",
    "county_or_equivalent_display": "Mitchell County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mitchell County",
    "census_2025_geoid": "13205",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Monroe, GA",
    "epa_source_county_label": "Monroe County",
    "county_or_equivalent_display": "Monroe County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Monroe County",
    "census_2025_geoid": "13207",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Montgomery, GA",
    "epa_source_county_label": "Montgomery County",
    "county_or_equivalent_display": "Montgomery County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Montgomery County",
    "census_2025_geoid": "13209",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Morgan, GA",
    "epa_source_county_label": "Morgan County",
    "county_or_equivalent_display": "Morgan County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Morgan County",
    "census_2025_geoid": "13211",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Murray, GA",
    "epa_source_county_label": "Murray County",
    "county_or_equivalent_display": "Murray County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Murray County",
    "census_2025_geoid": "13213",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Muscogee, GA",
    "epa_source_county_label": "Muscogee County",
    "county_or_equivalent_display": "Muscogee County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Muscogee County",
    "census_2025_geoid": "13215",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Newton, GA",
    "epa_source_county_label": "Newton County",
    "county_or_equivalent_display": "Newton County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Newton County",
    "census_2025_geoid": "13217",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Oconee, GA",
    "epa_source_county_label": "Oconee County",
    "county_or_equivalent_display": "Oconee County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Oconee County",
    "census_2025_geoid": "13219",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Oglethorpe, GA",
    "epa_source_county_label": "Oglethorpe County",
    "county_or_equivalent_display": "Oglethorpe County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Oglethorpe County",
    "census_2025_geoid": "13221",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Paulding, GA",
    "epa_source_county_label": "Paulding County",
    "county_or_equivalent_display": "Paulding County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Paulding County",
    "census_2025_geoid": "13223",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Peach, GA",
    "epa_source_county_label": "Peach County",
    "county_or_equivalent_display": "Peach County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Peach County",
    "census_2025_geoid": "13225",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pickens, GA",
    "epa_source_county_label": "Pickens County",
    "county_or_equivalent_display": "Pickens County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pickens County",
    "census_2025_geoid": "13227",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pierce, GA",
    "epa_source_county_label": "Pierce County",
    "county_or_equivalent_display": "Pierce County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pierce County",
    "census_2025_geoid": "13229",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pike, GA",
    "epa_source_county_label": "Pike County",
    "county_or_equivalent_display": "Pike County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pike County",
    "census_2025_geoid": "13231",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Polk, GA",
    "epa_source_county_label": "Polk County",
    "county_or_equivalent_display": "Polk County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Polk County",
    "census_2025_geoid": "13233",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pulaski, GA",
    "epa_source_county_label": "Pulaski County",
    "county_or_equivalent_display": "Pulaski County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pulaski County",
    "census_2025_geoid": "13235",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Putnam, GA",
    "epa_source_county_label": "Putnam County",
    "county_or_equivalent_display": "Putnam County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Putnam County",
    "census_2025_geoid": "13237",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Quitman, GA",
    "epa_source_county_label": "Quitman County",
    "county_or_equivalent_display": "Quitman County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Quitman County",
    "census_2025_geoid": "13239",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rabun, GA",
    "epa_source_county_label": "Rabun County",
    "county_or_equivalent_display": "Rabun County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rabun County",
    "census_2025_geoid": "13241",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Randolph, GA",
    "epa_source_county_label": "Randolph County",
    "county_or_equivalent_display": "Randolph County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Randolph County",
    "census_2025_geoid": "13243",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Richmond, GA",
    "epa_source_county_label": "Richmond County",
    "county_or_equivalent_display": "Richmond County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Richmond County",
    "census_2025_geoid": "13245",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rockdale, GA",
    "epa_source_county_label": "Rockdale County",
    "county_or_equivalent_display": "Rockdale County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rockdale County",
    "census_2025_geoid": "13247",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Schley, GA",
    "epa_source_county_label": "Schley County",
    "county_or_equivalent_display": "Schley County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Schley County",
    "census_2025_geoid": "13249",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Screven, GA",
    "epa_source_county_label": "Screven County",
    "county_or_equivalent_display": "Screven County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Screven County",
    "census_2025_geoid": "13251",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Seminole, GA",
    "epa_source_county_label": "Seminole County",
    "county_or_equivalent_display": "Seminole County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Seminole County",
    "census_2025_geoid": "13253",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Spalding, GA",
    "epa_source_county_label": "Spalding County",
    "county_or_equivalent_display": "Spalding County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Spalding County",
    "census_2025_geoid": "13255",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Stephens, GA",
    "epa_source_county_label": "Stephens County",
    "county_or_equivalent_display": "Stephens County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Stephens County",
    "census_2025_geoid": "13257",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Stewart, GA",
    "epa_source_county_label": "Stewart County",
    "county_or_equivalent_display": "Stewart County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Stewart County",
    "census_2025_geoid": "13259",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sumter, GA",
    "epa_source_county_label": "Sumter County",
    "county_or_equivalent_display": "Sumter County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sumter County",
    "census_2025_geoid": "13261",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Talbot, GA",
    "epa_source_county_label": "Talbot County",
    "county_or_equivalent_display": "Talbot County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Talbot County",
    "census_2025_geoid": "13263",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Taliaferro, GA",
    "epa_source_county_label": "Taliaferro County",
    "county_or_equivalent_display": "Taliaferro County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Taliaferro County",
    "census_2025_geoid": "13265",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tattnall, GA",
    "epa_source_county_label": "Tattnall County",
    "county_or_equivalent_display": "Tattnall County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tattnall County",
    "census_2025_geoid": "13267",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Taylor, GA",
    "epa_source_county_label": "Taylor County",
    "county_or_equivalent_display": "Taylor County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Taylor County",
    "census_2025_geoid": "13269",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Telfair, GA",
    "epa_source_county_label": "Telfair County",
    "county_or_equivalent_display": "Telfair County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Telfair County",
    "census_2025_geoid": "13271",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Terrell, GA",
    "epa_source_county_label": "Terrell County",
    "county_or_equivalent_display": "Terrell County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Terrell County",
    "census_2025_geoid": "13273",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Thomas, GA",
    "epa_source_county_label": "Thomas County",
    "county_or_equivalent_display": "Thomas County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Thomas County",
    "census_2025_geoid": "13275",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tift, GA",
    "epa_source_county_label": "Tift County",
    "county_or_equivalent_display": "Tift County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tift County",
    "census_2025_geoid": "13277",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Toombs, GA",
    "epa_source_county_label": "Toombs County",
    "county_or_equivalent_display": "Toombs County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Toombs County",
    "census_2025_geoid": "13279",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Towns, GA",
    "epa_source_county_label": "Towns County",
    "county_or_equivalent_display": "Towns County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Towns County",
    "census_2025_geoid": "13281",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Treutlen, GA",
    "epa_source_county_label": "Treutlen County",
    "county_or_equivalent_display": "Treutlen County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Treutlen County",
    "census_2025_geoid": "13283",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Troup, GA",
    "epa_source_county_label": "Troup County",
    "county_or_equivalent_display": "Troup County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Troup County",
    "census_2025_geoid": "13285",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Turner, GA",
    "epa_source_county_label": "Turner County",
    "county_or_equivalent_display": "Turner County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Turner County",
    "census_2025_geoid": "13287",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Twiggs, GA",
    "epa_source_county_label": "Twiggs County",
    "county_or_equivalent_display": "Twiggs County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Twiggs County",
    "census_2025_geoid": "13289",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Union, GA",
    "epa_source_county_label": "Union County",
    "county_or_equivalent_display": "Union County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Union County",
    "census_2025_geoid": "13291",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Upson, GA",
    "epa_source_county_label": "Upson County",
    "county_or_equivalent_display": "Upson County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Upson County",
    "census_2025_geoid": "13293",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Walker, GA",
    "epa_source_county_label": "Walker County",
    "county_or_equivalent_display": "Walker County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Walker County",
    "census_2025_geoid": "13295",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Walton, GA",
    "epa_source_county_label": "Walton County",
    "county_or_equivalent_display": "Walton County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Walton County",
    "census_2025_geoid": "13297",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ware, GA",
    "epa_source_county_label": "Ware County",
    "county_or_equivalent_display": "Ware County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ware County",
    "census_2025_geoid": "13299",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Warren, GA",
    "epa_source_county_label": "Warren County",
    "county_or_equivalent_display": "Warren County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Warren County",
    "census_2025_geoid": "13301",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washington, GA",
    "epa_source_county_label": "Washington County",
    "county_or_equivalent_display": "Washington County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washington County",
    "census_2025_geoid": "13303",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wayne, GA",
    "epa_source_county_label": "Wayne County",
    "county_or_equivalent_display": "Wayne County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wayne County",
    "census_2025_geoid": "13305",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Webster, GA",
    "epa_source_county_label": "Webster County",
    "county_or_equivalent_display": "Webster County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Webster County",
    "census_2025_geoid": "13307",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wheeler, GA",
    "epa_source_county_label": "Wheeler County",
    "county_or_equivalent_display": "Wheeler County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wheeler County",
    "census_2025_geoid": "13309",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "White, GA",
    "epa_source_county_label": "White County",
    "county_or_equivalent_display": "White County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "White County",
    "census_2025_geoid": "13311",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Whitfield, GA",
    "epa_source_county_label": "Whitfield County",
    "county_or_equivalent_display": "Whitfield County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Whitfield County",
    "census_2025_geoid": "13313",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wilcox, GA",
    "epa_source_county_label": "Wilcox County",
    "county_or_equivalent_display": "Wilcox County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wilcox County",
    "census_2025_geoid": "13315",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wilkes, GA",
    "epa_source_county_label": "Wilkes County",
    "county_or_equivalent_display": "Wilkes County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wilkes County",
    "census_2025_geoid": "13317",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wilkinson, GA",
    "epa_source_county_label": "Wilkinson County",
    "county_or_equivalent_display": "Wilkinson County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wilkinson County",
    "census_2025_geoid": "13319",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Worth, GA",
    "epa_source_county_label": "Worth County",
    "county_or_equivalent_display": "Worth County",
    "state_name": "Georgia",
    "state_abbreviation": "GA",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Worth County",
    "census_2025_geoid": "13321",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hawaii, HI",
    "epa_source_county_label": "Hawaii County",
    "county_or_equivalent_display": "Hawaii County",
    "state_name": "Hawaii",
    "state_abbreviation": "HI",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hawaii County",
    "census_2025_geoid": "15001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Honolulu, HI",
    "epa_source_county_label": "Honolulu County",
    "county_or_equivalent_display": "Honolulu County",
    "state_name": "Hawaii",
    "state_abbreviation": "HI",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Honolulu County",
    "census_2025_geoid": "15003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kalawao, HI",
    "epa_source_county_label": "Kalawao County",
    "county_or_equivalent_display": "Kalawao County",
    "state_name": "Hawaii",
    "state_abbreviation": "HI",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kalawao County",
    "census_2025_geoid": "15005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kauai, HI",
    "epa_source_county_label": "Kauai County",
    "county_or_equivalent_display": "Kauai County",
    "state_name": "Hawaii",
    "state_abbreviation": "HI",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kauai County",
    "census_2025_geoid": "15007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Maui, HI",
    "epa_source_county_label": "Maui County",
    "county_or_equivalent_display": "Maui County",
    "state_name": "Hawaii",
    "state_abbreviation": "HI",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Maui County",
    "census_2025_geoid": "15009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ada, ID",
    "epa_source_county_label": "Ada County",
    "county_or_equivalent_display": "Ada County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ada County",
    "census_2025_geoid": "16001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Adams, ID",
    "epa_source_county_label": "Adams County",
    "county_or_equivalent_display": "Adams County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Adams County",
    "census_2025_geoid": "16003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bannock, ID",
    "epa_source_county_label": "Bannock County",
    "county_or_equivalent_display": "Bannock County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bannock County",
    "census_2025_geoid": "16005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bear Lake, ID",
    "epa_source_county_label": "Bear Lake County",
    "county_or_equivalent_display": "Bear Lake County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bear Lake County",
    "census_2025_geoid": "16007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Benewah, ID",
    "epa_source_county_label": "Benewah County",
    "county_or_equivalent_display": "Benewah County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Benewah County",
    "census_2025_geoid": "16009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bingham, ID",
    "epa_source_county_label": "Bingham County",
    "county_or_equivalent_display": "Bingham County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bingham County",
    "census_2025_geoid": "16011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Blaine, ID",
    "epa_source_county_label": "Blaine County",
    "county_or_equivalent_display": "Blaine County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Blaine County",
    "census_2025_geoid": "16013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Boise, ID",
    "epa_source_county_label": "Boise County",
    "county_or_equivalent_display": "Boise County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Boise County",
    "census_2025_geoid": "16015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bonner, ID",
    "epa_source_county_label": "Bonner County",
    "county_or_equivalent_display": "Bonner County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bonner County",
    "census_2025_geoid": "16017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bonneville, ID",
    "epa_source_county_label": "Bonneville County",
    "county_or_equivalent_display": "Bonneville County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bonneville County",
    "census_2025_geoid": "16019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Boundary, ID",
    "epa_source_county_label": "Boundary County",
    "county_or_equivalent_display": "Boundary County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Boundary County",
    "census_2025_geoid": "16021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Butte, ID",
    "epa_source_county_label": "Butte County",
    "county_or_equivalent_display": "Butte County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Butte County",
    "census_2025_geoid": "16023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Camas, ID",
    "epa_source_county_label": "Camas County",
    "county_or_equivalent_display": "Camas County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Camas County",
    "census_2025_geoid": "16025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Canyon, ID",
    "epa_source_county_label": "Canyon County",
    "county_or_equivalent_display": "Canyon County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Canyon County",
    "census_2025_geoid": "16027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Caribou, ID",
    "epa_source_county_label": "Caribou County",
    "county_or_equivalent_display": "Caribou County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Caribou County",
    "census_2025_geoid": "16029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cassia, ID",
    "epa_source_county_label": "Cassia County",
    "county_or_equivalent_display": "Cassia County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cassia County",
    "census_2025_geoid": "16031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clark, ID",
    "epa_source_county_label": "Clark County",
    "county_or_equivalent_display": "Clark County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clark County",
    "census_2025_geoid": "16033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clearwater, ID",
    "epa_source_county_label": "Clearwater County",
    "county_or_equivalent_display": "Clearwater County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clearwater County",
    "census_2025_geoid": "16035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Custer, ID",
    "epa_source_county_label": "Custer County",
    "county_or_equivalent_display": "Custer County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Custer County",
    "census_2025_geoid": "16037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Elmore, ID",
    "epa_source_county_label": "Elmore County",
    "county_or_equivalent_display": "Elmore County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Elmore County",
    "census_2025_geoid": "16039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Franklin, ID",
    "epa_source_county_label": "Franklin County",
    "county_or_equivalent_display": "Franklin County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Franklin County",
    "census_2025_geoid": "16041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fremont, ID",
    "epa_source_county_label": "Fremont County",
    "county_or_equivalent_display": "Fremont County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fremont County",
    "census_2025_geoid": "16043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gem, ID",
    "epa_source_county_label": "Gem County",
    "county_or_equivalent_display": "Gem County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gem County",
    "census_2025_geoid": "16045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gooding, ID",
    "epa_source_county_label": "Gooding County",
    "county_or_equivalent_display": "Gooding County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gooding County",
    "census_2025_geoid": "16047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Idaho, ID",
    "epa_source_county_label": "Idaho County",
    "county_or_equivalent_display": "Idaho County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Idaho County",
    "census_2025_geoid": "16049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jefferson, ID",
    "epa_source_county_label": "Jefferson County",
    "county_or_equivalent_display": "Jefferson County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jefferson County",
    "census_2025_geoid": "16051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jerome, ID",
    "epa_source_county_label": "Jerome County",
    "county_or_equivalent_display": "Jerome County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jerome County",
    "census_2025_geoid": "16053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kootenai, ID",
    "epa_source_county_label": "Kootenai County",
    "county_or_equivalent_display": "Kootenai County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kootenai County",
    "census_2025_geoid": "16055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Latah, ID",
    "epa_source_county_label": "Latah County",
    "county_or_equivalent_display": "Latah County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Latah County",
    "census_2025_geoid": "16057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lemhi, ID",
    "epa_source_county_label": "Lemhi County",
    "county_or_equivalent_display": "Lemhi County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lemhi County",
    "census_2025_geoid": "16059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lewis, ID",
    "epa_source_county_label": "Lewis County",
    "county_or_equivalent_display": "Lewis County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lewis County",
    "census_2025_geoid": "16061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lincoln, ID",
    "epa_source_county_label": "Lincoln County",
    "county_or_equivalent_display": "Lincoln County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lincoln County",
    "census_2025_geoid": "16063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Madison, ID",
    "epa_source_county_label": "Madison County",
    "county_or_equivalent_display": "Madison County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Madison County",
    "census_2025_geoid": "16065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Minidoka, ID",
    "epa_source_county_label": "Minidoka County",
    "county_or_equivalent_display": "Minidoka County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Minidoka County",
    "census_2025_geoid": "16067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Nez Perce, ID",
    "epa_source_county_label": "Nez Perce County",
    "county_or_equivalent_display": "Nez Perce County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Nez Perce County",
    "census_2025_geoid": "16069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Oneida, ID",
    "epa_source_county_label": "Oneida County",
    "county_or_equivalent_display": "Oneida County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Oneida County",
    "census_2025_geoid": "16071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Owyhee, ID",
    "epa_source_county_label": "Owyhee County",
    "county_or_equivalent_display": "Owyhee County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Owyhee County",
    "census_2025_geoid": "16073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Payette, ID",
    "epa_source_county_label": "Payette County",
    "county_or_equivalent_display": "Payette County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Payette County",
    "census_2025_geoid": "16075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Power, ID",
    "epa_source_county_label": "Power County",
    "county_or_equivalent_display": "Power County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Power County",
    "census_2025_geoid": "16077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Shoshone, ID",
    "epa_source_county_label": "Shoshone County",
    "county_or_equivalent_display": "Shoshone County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Shoshone County",
    "census_2025_geoid": "16079",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Teton, ID",
    "epa_source_county_label": "Teton County",
    "county_or_equivalent_display": "Teton County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Teton County",
    "census_2025_geoid": "16081",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Twin Falls, ID",
    "epa_source_county_label": "Twin Falls County",
    "county_or_equivalent_display": "Twin Falls County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Twin Falls County",
    "census_2025_geoid": "16083",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Valley, ID",
    "epa_source_county_label": "Valley County",
    "county_or_equivalent_display": "Valley County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Valley County",
    "census_2025_geoid": "16085",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washington, ID",
    "epa_source_county_label": "Washington County",
    "county_or_equivalent_display": "Washington County",
    "state_name": "Idaho",
    "state_abbreviation": "ID",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washington County",
    "census_2025_geoid": "16087",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Adams, IL",
    "epa_source_county_label": "Adams County",
    "county_or_equivalent_display": "Adams County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Adams County",
    "census_2025_geoid": "17001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Alexander, IL",
    "epa_source_county_label": "Alexander County",
    "county_or_equivalent_display": "Alexander County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Alexander County",
    "census_2025_geoid": "17003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bond, IL",
    "epa_source_county_label": "Bond County",
    "county_or_equivalent_display": "Bond County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bond County",
    "census_2025_geoid": "17005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Boone, IL",
    "epa_source_county_label": "Boone County",
    "county_or_equivalent_display": "Boone County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Boone County",
    "census_2025_geoid": "17007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Brown, IL",
    "epa_source_county_label": "Brown County",
    "county_or_equivalent_display": "Brown County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Brown County",
    "census_2025_geoid": "17009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bureau, IL",
    "epa_source_county_label": "Bureau County",
    "county_or_equivalent_display": "Bureau County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bureau County",
    "census_2025_geoid": "17011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Calhoun, IL",
    "epa_source_county_label": "Calhoun County",
    "county_or_equivalent_display": "Calhoun County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Calhoun County",
    "census_2025_geoid": "17013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Carroll, IL",
    "epa_source_county_label": "Carroll County",
    "county_or_equivalent_display": "Carroll County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Carroll County",
    "census_2025_geoid": "17015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cass, IL",
    "epa_source_county_label": "Cass County",
    "county_or_equivalent_display": "Cass County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cass County",
    "census_2025_geoid": "17017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Champaign, IL",
    "epa_source_county_label": "Champaign County",
    "county_or_equivalent_display": "Champaign County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Champaign County",
    "census_2025_geoid": "17019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Christian, IL",
    "epa_source_county_label": "Christian County",
    "county_or_equivalent_display": "Christian County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Christian County",
    "census_2025_geoid": "17021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clark, IL",
    "epa_source_county_label": "Clark County",
    "county_or_equivalent_display": "Clark County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clark County",
    "census_2025_geoid": "17023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clay, IL",
    "epa_source_county_label": "Clay County",
    "county_or_equivalent_display": "Clay County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clay County",
    "census_2025_geoid": "17025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clinton, IL",
    "epa_source_county_label": "Clinton County",
    "county_or_equivalent_display": "Clinton County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clinton County",
    "census_2025_geoid": "17027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Coles, IL",
    "epa_source_county_label": "Coles County",
    "county_or_equivalent_display": "Coles County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Coles County",
    "census_2025_geoid": "17029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cook, IL",
    "epa_source_county_label": "Cook County",
    "county_or_equivalent_display": "Cook County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cook County",
    "census_2025_geoid": "17031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Crawford, IL",
    "epa_source_county_label": "Crawford County",
    "county_or_equivalent_display": "Crawford County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Crawford County",
    "census_2025_geoid": "17033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cumberland, IL",
    "epa_source_county_label": "Cumberland County",
    "county_or_equivalent_display": "Cumberland County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cumberland County",
    "census_2025_geoid": "17035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "De Witt, IL",
    "epa_source_county_label": "De Witt County",
    "county_or_equivalent_display": "De Witt County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "De Witt County",
    "census_2025_geoid": "17039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "DeKalb, IL",
    "epa_source_county_label": "DeKalb County",
    "county_or_equivalent_display": "DeKalb County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "DeKalb County",
    "census_2025_geoid": "17037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Douglas, IL",
    "epa_source_county_label": "Douglas County",
    "county_or_equivalent_display": "Douglas County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Douglas County",
    "census_2025_geoid": "17041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "DuPage, IL",
    "epa_source_county_label": "DuPage County",
    "county_or_equivalent_display": "DuPage County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "DuPage County",
    "census_2025_geoid": "17043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Edgar, IL",
    "epa_source_county_label": "Edgar County",
    "county_or_equivalent_display": "Edgar County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Edgar County",
    "census_2025_geoid": "17045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Edwards, IL",
    "epa_source_county_label": "Edwards County",
    "county_or_equivalent_display": "Edwards County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Edwards County",
    "census_2025_geoid": "17047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Effingham, IL",
    "epa_source_county_label": "Effingham County",
    "county_or_equivalent_display": "Effingham County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Effingham County",
    "census_2025_geoid": "17049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fayette, IL",
    "epa_source_county_label": "Fayette County",
    "county_or_equivalent_display": "Fayette County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fayette County",
    "census_2025_geoid": "17051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ford, IL",
    "epa_source_county_label": "Ford County",
    "county_or_equivalent_display": "Ford County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ford County",
    "census_2025_geoid": "17053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Franklin, IL",
    "epa_source_county_label": "Franklin County",
    "county_or_equivalent_display": "Franklin County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Franklin County",
    "census_2025_geoid": "17055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fulton, IL",
    "epa_source_county_label": "Fulton County",
    "county_or_equivalent_display": "Fulton County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fulton County",
    "census_2025_geoid": "17057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gallatin, IL",
    "epa_source_county_label": "Gallatin County",
    "county_or_equivalent_display": "Gallatin County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gallatin County",
    "census_2025_geoid": "17059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Greene, IL",
    "epa_source_county_label": "Greene County",
    "county_or_equivalent_display": "Greene County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Greene County",
    "census_2025_geoid": "17061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grundy, IL",
    "epa_source_county_label": "Grundy County",
    "county_or_equivalent_display": "Grundy County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grundy County",
    "census_2025_geoid": "17063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hamilton, IL",
    "epa_source_county_label": "Hamilton County",
    "county_or_equivalent_display": "Hamilton County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hamilton County",
    "census_2025_geoid": "17065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hancock, IL",
    "epa_source_county_label": "Hancock County",
    "county_or_equivalent_display": "Hancock County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hancock County",
    "census_2025_geoid": "17067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hardin, IL",
    "epa_source_county_label": "Hardin County",
    "county_or_equivalent_display": "Hardin County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hardin County",
    "census_2025_geoid": "17069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Henderson, IL",
    "epa_source_county_label": "Henderson County",
    "county_or_equivalent_display": "Henderson County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Henderson County",
    "census_2025_geoid": "17071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Henry, IL",
    "epa_source_county_label": "Henry County",
    "county_or_equivalent_display": "Henry County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Henry County",
    "census_2025_geoid": "17073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Iroquois, IL",
    "epa_source_county_label": "Iroquois County",
    "county_or_equivalent_display": "Iroquois County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Iroquois County",
    "census_2025_geoid": "17075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jackson, IL",
    "epa_source_county_label": "Jackson County",
    "county_or_equivalent_display": "Jackson County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jackson County",
    "census_2025_geoid": "17077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jasper, IL",
    "epa_source_county_label": "Jasper County",
    "county_or_equivalent_display": "Jasper County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jasper County",
    "census_2025_geoid": "17079",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jefferson, IL",
    "epa_source_county_label": "Jefferson County",
    "county_or_equivalent_display": "Jefferson County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jefferson County",
    "census_2025_geoid": "17081",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jersey, IL",
    "epa_source_county_label": "Jersey County",
    "county_or_equivalent_display": "Jersey County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jersey County",
    "census_2025_geoid": "17083",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jo Daviess, IL",
    "epa_source_county_label": "Jo Daviess County",
    "county_or_equivalent_display": "Jo Daviess County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jo Daviess County",
    "census_2025_geoid": "17085",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Johnson, IL",
    "epa_source_county_label": "Johnson County",
    "county_or_equivalent_display": "Johnson County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Johnson County",
    "census_2025_geoid": "17087",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kane, IL",
    "epa_source_county_label": "Kane County",
    "county_or_equivalent_display": "Kane County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kane County",
    "census_2025_geoid": "17089",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kankakee, IL",
    "epa_source_county_label": "Kankakee County",
    "county_or_equivalent_display": "Kankakee County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kankakee County",
    "census_2025_geoid": "17091",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kendall, IL",
    "epa_source_county_label": "Kendall County",
    "county_or_equivalent_display": "Kendall County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kendall County",
    "census_2025_geoid": "17093",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Knox, IL",
    "epa_source_county_label": "Knox County",
    "county_or_equivalent_display": "Knox County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Knox County",
    "census_2025_geoid": "17095",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "La Salle, IL",
    "epa_source_county_label": "LaSalle County",
    "county_or_equivalent_display": "LaSalle County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "LaSalle County",
    "census_2025_geoid": "17099",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lake, IL",
    "epa_source_county_label": "Lake County",
    "county_or_equivalent_display": "Lake County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lake County",
    "census_2025_geoid": "17097",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lawrence, IL",
    "epa_source_county_label": "Lawrence County",
    "county_or_equivalent_display": "Lawrence County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lawrence County",
    "census_2025_geoid": "17101",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lee, IL",
    "epa_source_county_label": "Lee County",
    "county_or_equivalent_display": "Lee County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lee County",
    "census_2025_geoid": "17103",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Livingston, IL",
    "epa_source_county_label": "Livingston County",
    "county_or_equivalent_display": "Livingston County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Livingston County",
    "census_2025_geoid": "17105",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Logan, IL",
    "epa_source_county_label": "Logan County",
    "county_or_equivalent_display": "Logan County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Logan County",
    "census_2025_geoid": "17107",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Macon, IL",
    "epa_source_county_label": "Macon County",
    "county_or_equivalent_display": "Macon County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Macon County",
    "census_2025_geoid": "17115",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Macoupin, IL",
    "epa_source_county_label": "Macoupin County",
    "county_or_equivalent_display": "Macoupin County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Macoupin County",
    "census_2025_geoid": "17117",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Madison, IL",
    "epa_source_county_label": "Madison County",
    "county_or_equivalent_display": "Madison County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Madison County",
    "census_2025_geoid": "17119",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marion, IL",
    "epa_source_county_label": "Marion County",
    "county_or_equivalent_display": "Marion County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marion County",
    "census_2025_geoid": "17121",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marshall, IL",
    "epa_source_county_label": "Marshall County",
    "county_or_equivalent_display": "Marshall County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marshall County",
    "census_2025_geoid": "17123",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mason, IL",
    "epa_source_county_label": "Mason County",
    "county_or_equivalent_display": "Mason County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mason County",
    "census_2025_geoid": "17125",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Massac, IL",
    "epa_source_county_label": "Massac County",
    "county_or_equivalent_display": "Massac County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Massac County",
    "census_2025_geoid": "17127",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "McDonough, IL",
    "epa_source_county_label": "McDonough County",
    "county_or_equivalent_display": "McDonough County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "McDonough County",
    "census_2025_geoid": "17109",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "McHenry, IL",
    "epa_source_county_label": "McHenry County",
    "county_or_equivalent_display": "McHenry County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "McHenry County",
    "census_2025_geoid": "17111",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "McLean, IL",
    "epa_source_county_label": "McLean County",
    "county_or_equivalent_display": "McLean County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "McLean County",
    "census_2025_geoid": "17113",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Menard, IL",
    "epa_source_county_label": "Menard County",
    "county_or_equivalent_display": "Menard County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Menard County",
    "census_2025_geoid": "17129",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mercer, IL",
    "epa_source_county_label": "Mercer County",
    "county_or_equivalent_display": "Mercer County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mercer County",
    "census_2025_geoid": "17131",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Monroe, IL",
    "epa_source_county_label": "Monroe County",
    "county_or_equivalent_display": "Monroe County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Monroe County",
    "census_2025_geoid": "17133",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Montgomery, IL",
    "epa_source_county_label": "Montgomery County",
    "county_or_equivalent_display": "Montgomery County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Montgomery County",
    "census_2025_geoid": "17135",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Morgan, IL",
    "epa_source_county_label": "Morgan County",
    "county_or_equivalent_display": "Morgan County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Morgan County",
    "census_2025_geoid": "17137",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Moultrie, IL",
    "epa_source_county_label": "Moultrie County",
    "county_or_equivalent_display": "Moultrie County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Moultrie County",
    "census_2025_geoid": "17139",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ogle, IL",
    "epa_source_county_label": "Ogle County",
    "county_or_equivalent_display": "Ogle County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ogle County",
    "census_2025_geoid": "17141",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Peoria, IL",
    "epa_source_county_label": "Peoria County",
    "county_or_equivalent_display": "Peoria County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Peoria County",
    "census_2025_geoid": "17143",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Perry, IL",
    "epa_source_county_label": "Perry County",
    "county_or_equivalent_display": "Perry County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Perry County",
    "census_2025_geoid": "17145",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Piatt, IL",
    "epa_source_county_label": "Piatt County",
    "county_or_equivalent_display": "Piatt County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Piatt County",
    "census_2025_geoid": "17147",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pike, IL",
    "epa_source_county_label": "Pike County",
    "county_or_equivalent_display": "Pike County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pike County",
    "census_2025_geoid": "17149",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pope, IL",
    "epa_source_county_label": "Pope County",
    "county_or_equivalent_display": "Pope County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pope County",
    "census_2025_geoid": "17151",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pulaski, IL",
    "epa_source_county_label": "Pulaski County",
    "county_or_equivalent_display": "Pulaski County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pulaski County",
    "census_2025_geoid": "17153",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Putnam, IL",
    "epa_source_county_label": "Putnam County",
    "county_or_equivalent_display": "Putnam County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Putnam County",
    "census_2025_geoid": "17155",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Randolph, IL",
    "epa_source_county_label": "Randolph County",
    "county_or_equivalent_display": "Randolph County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Randolph County",
    "census_2025_geoid": "17157",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Richland, IL",
    "epa_source_county_label": "Richland County",
    "county_or_equivalent_display": "Richland County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Richland County",
    "census_2025_geoid": "17159",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rock Island, IL",
    "epa_source_county_label": "Rock Island County",
    "county_or_equivalent_display": "Rock Island County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rock Island County",
    "census_2025_geoid": "17161",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Saline, IL",
    "epa_source_county_label": "Saline County",
    "county_or_equivalent_display": "Saline County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Saline County",
    "census_2025_geoid": "17165",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sangamon, IL",
    "epa_source_county_label": "Sangamon County",
    "county_or_equivalent_display": "Sangamon County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sangamon County",
    "census_2025_geoid": "17167",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Schuyler, IL",
    "epa_source_county_label": "Schuyler County",
    "county_or_equivalent_display": "Schuyler County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Schuyler County",
    "census_2025_geoid": "17169",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Scott, IL",
    "epa_source_county_label": "Scott County",
    "county_or_equivalent_display": "Scott County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Scott County",
    "census_2025_geoid": "17171",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Shelby, IL",
    "epa_source_county_label": "Shelby County",
    "county_or_equivalent_display": "Shelby County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Shelby County",
    "census_2025_geoid": "17173",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "St. Clair, IL",
    "epa_source_county_label": "St. Clair County",
    "county_or_equivalent_display": "St. Clair County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "St. Clair County",
    "census_2025_geoid": "17163",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Stark, IL",
    "epa_source_county_label": "Stark County",
    "county_or_equivalent_display": "Stark County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Stark County",
    "census_2025_geoid": "17175",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Stephenson, IL",
    "epa_source_county_label": "Stephenson County",
    "county_or_equivalent_display": "Stephenson County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Stephenson County",
    "census_2025_geoid": "17177",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tazewell, IL",
    "epa_source_county_label": "Tazewell County",
    "county_or_equivalent_display": "Tazewell County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tazewell County",
    "census_2025_geoid": "17179",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Union, IL",
    "epa_source_county_label": "Union County",
    "county_or_equivalent_display": "Union County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Union County",
    "census_2025_geoid": "17181",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Vermilion, IL",
    "epa_source_county_label": "Vermilion County",
    "county_or_equivalent_display": "Vermilion County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Vermilion County",
    "census_2025_geoid": "17183",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wabash, IL",
    "epa_source_county_label": "Wabash County",
    "county_or_equivalent_display": "Wabash County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wabash County",
    "census_2025_geoid": "17185",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Warren, IL",
    "epa_source_county_label": "Warren County",
    "county_or_equivalent_display": "Warren County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Warren County",
    "census_2025_geoid": "17187",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washington, IL",
    "epa_source_county_label": "Washington County",
    "county_or_equivalent_display": "Washington County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washington County",
    "census_2025_geoid": "17189",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wayne, IL",
    "epa_source_county_label": "Wayne County",
    "county_or_equivalent_display": "Wayne County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wayne County",
    "census_2025_geoid": "17191",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "White, IL",
    "epa_source_county_label": "White County",
    "county_or_equivalent_display": "White County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "White County",
    "census_2025_geoid": "17193",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Whiteside, IL",
    "epa_source_county_label": "Whiteside County",
    "county_or_equivalent_display": "Whiteside County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Whiteside County",
    "census_2025_geoid": "17195",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Will, IL",
    "epa_source_county_label": "Will County",
    "county_or_equivalent_display": "Will County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Will County",
    "census_2025_geoid": "17197",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Williamson, IL",
    "epa_source_county_label": "Williamson County",
    "county_or_equivalent_display": "Williamson County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Williamson County",
    "census_2025_geoid": "17199",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Winnebago, IL",
    "epa_source_county_label": "Winnebago County",
    "county_or_equivalent_display": "Winnebago County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Winnebago County",
    "census_2025_geoid": "17201",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Woodford, IL",
    "epa_source_county_label": "Woodford County",
    "county_or_equivalent_display": "Woodford County",
    "state_name": "Illinois",
    "state_abbreviation": "IL",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Woodford County",
    "census_2025_geoid": "17203",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Adams, IN",
    "epa_source_county_label": "Adams County",
    "county_or_equivalent_display": "Adams County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Adams County",
    "census_2025_geoid": "18001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Allen, IN",
    "epa_source_county_label": "Allen County",
    "county_or_equivalent_display": "Allen County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Allen County",
    "census_2025_geoid": "18003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bartholomew, IN",
    "epa_source_county_label": "Bartholomew County",
    "county_or_equivalent_display": "Bartholomew County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bartholomew County",
    "census_2025_geoid": "18005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Benton, IN",
    "epa_source_county_label": "Benton County",
    "county_or_equivalent_display": "Benton County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Benton County",
    "census_2025_geoid": "18007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Blackford, IN",
    "epa_source_county_label": "Blackford County",
    "county_or_equivalent_display": "Blackford County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Blackford County",
    "census_2025_geoid": "18009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Boone, IN",
    "epa_source_county_label": "Boone County",
    "county_or_equivalent_display": "Boone County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Boone County",
    "census_2025_geoid": "18011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Brown, IN",
    "epa_source_county_label": "Brown County",
    "county_or_equivalent_display": "Brown County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Brown County",
    "census_2025_geoid": "18013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Carroll, IN",
    "epa_source_county_label": "Carroll County",
    "county_or_equivalent_display": "Carroll County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Carroll County",
    "census_2025_geoid": "18015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cass, IN",
    "epa_source_county_label": "Cass County",
    "county_or_equivalent_display": "Cass County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cass County",
    "census_2025_geoid": "18017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clark, IN",
    "epa_source_county_label": "Clark County",
    "county_or_equivalent_display": "Clark County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clark County",
    "census_2025_geoid": "18019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clay, IN",
    "epa_source_county_label": "Clay County",
    "county_or_equivalent_display": "Clay County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clay County",
    "census_2025_geoid": "18021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clinton, IN",
    "epa_source_county_label": "Clinton County",
    "county_or_equivalent_display": "Clinton County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clinton County",
    "census_2025_geoid": "18023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Crawford, IN",
    "epa_source_county_label": "Crawford County",
    "county_or_equivalent_display": "Crawford County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Crawford County",
    "census_2025_geoid": "18025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Daviess, IN",
    "epa_source_county_label": "Daviess County",
    "county_or_equivalent_display": "Daviess County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Daviess County",
    "census_2025_geoid": "18027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "De Kalb, IN",
    "epa_source_county_label": "DeKalb County",
    "county_or_equivalent_display": "DeKalb County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "DeKalb County",
    "census_2025_geoid": "18033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dearborn, IN",
    "epa_source_county_label": "Dearborn County",
    "county_or_equivalent_display": "Dearborn County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dearborn County",
    "census_2025_geoid": "18029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Decatur, IN",
    "epa_source_county_label": "Decatur County",
    "county_or_equivalent_display": "Decatur County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Decatur County",
    "census_2025_geoid": "18031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Delaware, IN",
    "epa_source_county_label": "Delaware County",
    "county_or_equivalent_display": "Delaware County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Delaware County",
    "census_2025_geoid": "18035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dubois, IN",
    "epa_source_county_label": "Dubois County",
    "county_or_equivalent_display": "Dubois County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dubois County",
    "census_2025_geoid": "18037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Elkhart, IN",
    "epa_source_county_label": "Elkhart County",
    "county_or_equivalent_display": "Elkhart County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Elkhart County",
    "census_2025_geoid": "18039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fayette, IN",
    "epa_source_county_label": "Fayette County",
    "county_or_equivalent_display": "Fayette County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fayette County",
    "census_2025_geoid": "18041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Floyd, IN",
    "epa_source_county_label": "Floyd County",
    "county_or_equivalent_display": "Floyd County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Floyd County",
    "census_2025_geoid": "18043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fountain, IN",
    "epa_source_county_label": "Fountain County",
    "county_or_equivalent_display": "Fountain County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fountain County",
    "census_2025_geoid": "18045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Franklin, IN",
    "epa_source_county_label": "Franklin County",
    "county_or_equivalent_display": "Franklin County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Franklin County",
    "census_2025_geoid": "18047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fulton, IN",
    "epa_source_county_label": "Fulton County",
    "county_or_equivalent_display": "Fulton County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fulton County",
    "census_2025_geoid": "18049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gibson, IN",
    "epa_source_county_label": "Gibson County",
    "county_or_equivalent_display": "Gibson County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gibson County",
    "census_2025_geoid": "18051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grant, IN",
    "epa_source_county_label": "Grant County",
    "county_or_equivalent_display": "Grant County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grant County",
    "census_2025_geoid": "18053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Greene, IN",
    "epa_source_county_label": "Greene County",
    "county_or_equivalent_display": "Greene County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Greene County",
    "census_2025_geoid": "18055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hamilton, IN",
    "epa_source_county_label": "Hamilton County",
    "county_or_equivalent_display": "Hamilton County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hamilton County",
    "census_2025_geoid": "18057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hancock, IN",
    "epa_source_county_label": "Hancock County",
    "county_or_equivalent_display": "Hancock County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hancock County",
    "census_2025_geoid": "18059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Harrison, IN",
    "epa_source_county_label": "Harrison County",
    "county_or_equivalent_display": "Harrison County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Harrison County",
    "census_2025_geoid": "18061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hendricks, IN",
    "epa_source_county_label": "Hendricks County",
    "county_or_equivalent_display": "Hendricks County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hendricks County",
    "census_2025_geoid": "18063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Henry, IN",
    "epa_source_county_label": "Henry County",
    "county_or_equivalent_display": "Henry County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Henry County",
    "census_2025_geoid": "18065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Howard, IN",
    "epa_source_county_label": "Howard County",
    "county_or_equivalent_display": "Howard County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Howard County",
    "census_2025_geoid": "18067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Huntington, IN",
    "epa_source_county_label": "Huntington County",
    "county_or_equivalent_display": "Huntington County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Huntington County",
    "census_2025_geoid": "18069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jackson, IN",
    "epa_source_county_label": "Jackson County",
    "county_or_equivalent_display": "Jackson County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jackson County",
    "census_2025_geoid": "18071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jasper, IN",
    "epa_source_county_label": "Jasper County",
    "county_or_equivalent_display": "Jasper County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jasper County",
    "census_2025_geoid": "18073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jay, IN",
    "epa_source_county_label": "Jay County",
    "county_or_equivalent_display": "Jay County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jay County",
    "census_2025_geoid": "18075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jefferson, IN",
    "epa_source_county_label": "Jefferson County",
    "county_or_equivalent_display": "Jefferson County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jefferson County",
    "census_2025_geoid": "18077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jennings, IN",
    "epa_source_county_label": "Jennings County",
    "county_or_equivalent_display": "Jennings County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jennings County",
    "census_2025_geoid": "18079",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Johnson, IN",
    "epa_source_county_label": "Johnson County",
    "county_or_equivalent_display": "Johnson County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Johnson County",
    "census_2025_geoid": "18081",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Knox, IN",
    "epa_source_county_label": "Knox County",
    "county_or_equivalent_display": "Knox County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Knox County",
    "census_2025_geoid": "18083",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kosciusko, IN",
    "epa_source_county_label": "Kosciusko County",
    "county_or_equivalent_display": "Kosciusko County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kosciusko County",
    "census_2025_geoid": "18085",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lagrange, IN",
    "epa_source_county_label": "LaGrange County",
    "county_or_equivalent_display": "LaGrange County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "LaGrange County",
    "census_2025_geoid": "18087",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "La Porte, IN",
    "epa_source_county_label": "LaPorte County",
    "county_or_equivalent_display": "LaPorte County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "LaPorte County",
    "census_2025_geoid": "18091",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lake, IN",
    "epa_source_county_label": "Lake County",
    "county_or_equivalent_display": "Lake County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lake County",
    "census_2025_geoid": "18089",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lawrence, IN",
    "epa_source_county_label": "Lawrence County",
    "county_or_equivalent_display": "Lawrence County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lawrence County",
    "census_2025_geoid": "18093",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Madison, IN",
    "epa_source_county_label": "Madison County",
    "county_or_equivalent_display": "Madison County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Madison County",
    "census_2025_geoid": "18095",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marion, IN",
    "epa_source_county_label": "Marion County",
    "county_or_equivalent_display": "Marion County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marion County",
    "census_2025_geoid": "18097",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marshall, IN",
    "epa_source_county_label": "Marshall County",
    "county_or_equivalent_display": "Marshall County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marshall County",
    "census_2025_geoid": "18099",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Martin, IN",
    "epa_source_county_label": "Martin County",
    "county_or_equivalent_display": "Martin County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Martin County",
    "census_2025_geoid": "18101",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Miami, IN",
    "epa_source_county_label": "Miami County",
    "county_or_equivalent_display": "Miami County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Miami County",
    "census_2025_geoid": "18103",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Monroe, IN",
    "epa_source_county_label": "Monroe County",
    "county_or_equivalent_display": "Monroe County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Monroe County",
    "census_2025_geoid": "18105",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Montgomery, IN",
    "epa_source_county_label": "Montgomery County",
    "county_or_equivalent_display": "Montgomery County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Montgomery County",
    "census_2025_geoid": "18107",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Morgan, IN",
    "epa_source_county_label": "Morgan County",
    "county_or_equivalent_display": "Morgan County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Morgan County",
    "census_2025_geoid": "18109",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Newton, IN",
    "epa_source_county_label": "Newton County",
    "county_or_equivalent_display": "Newton County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Newton County",
    "census_2025_geoid": "18111",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Noble, IN",
    "epa_source_county_label": "Noble County",
    "county_or_equivalent_display": "Noble County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Noble County",
    "census_2025_geoid": "18113",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ohio, IN",
    "epa_source_county_label": "Ohio County",
    "county_or_equivalent_display": "Ohio County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ohio County",
    "census_2025_geoid": "18115",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Orange, IN",
    "epa_source_county_label": "Orange County",
    "county_or_equivalent_display": "Orange County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Orange County",
    "census_2025_geoid": "18117",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Owen, IN",
    "epa_source_county_label": "Owen County",
    "county_or_equivalent_display": "Owen County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Owen County",
    "census_2025_geoid": "18119",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Parke, IN",
    "epa_source_county_label": "Parke County",
    "county_or_equivalent_display": "Parke County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Parke County",
    "census_2025_geoid": "18121",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Perry, IN",
    "epa_source_county_label": "Perry County",
    "county_or_equivalent_display": "Perry County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Perry County",
    "census_2025_geoid": "18123",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pike, IN",
    "epa_source_county_label": "Pike County",
    "county_or_equivalent_display": "Pike County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pike County",
    "census_2025_geoid": "18125",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Porter, IN",
    "epa_source_county_label": "Porter County",
    "county_or_equivalent_display": "Porter County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Porter County",
    "census_2025_geoid": "18127",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Posey, IN",
    "epa_source_county_label": "Posey County",
    "county_or_equivalent_display": "Posey County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Posey County",
    "census_2025_geoid": "18129",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pulaski, IN",
    "epa_source_county_label": "Pulaski County",
    "county_or_equivalent_display": "Pulaski County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pulaski County",
    "census_2025_geoid": "18131",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Putnam, IN",
    "epa_source_county_label": "Putnam County",
    "county_or_equivalent_display": "Putnam County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Putnam County",
    "census_2025_geoid": "18133",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Randolph, IN",
    "epa_source_county_label": "Randolph County",
    "county_or_equivalent_display": "Randolph County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Randolph County",
    "census_2025_geoid": "18135",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ripley, IN",
    "epa_source_county_label": "Ripley County",
    "county_or_equivalent_display": "Ripley County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ripley County",
    "census_2025_geoid": "18137",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rush, IN",
    "epa_source_county_label": "Rush County",
    "county_or_equivalent_display": "Rush County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rush County",
    "census_2025_geoid": "18139",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Scott, IN",
    "epa_source_county_label": "Scott County",
    "county_or_equivalent_display": "Scott County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Scott County",
    "census_2025_geoid": "18143",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Shelby, IN",
    "epa_source_county_label": "Shelby County",
    "county_or_equivalent_display": "Shelby County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Shelby County",
    "census_2025_geoid": "18145",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Spencer, IN",
    "epa_source_county_label": "Spencer County",
    "county_or_equivalent_display": "Spencer County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Spencer County",
    "census_2025_geoid": "18147",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "St. Joseph, IN",
    "epa_source_county_label": "St. Joseph County",
    "county_or_equivalent_display": "St. Joseph County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "St. Joseph County",
    "census_2025_geoid": "18141",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Starke, IN",
    "epa_source_county_label": "Starke County",
    "county_or_equivalent_display": "Starke County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Starke County",
    "census_2025_geoid": "18149",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Steuben, IN",
    "epa_source_county_label": "Steuben County",
    "county_or_equivalent_display": "Steuben County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Steuben County",
    "census_2025_geoid": "18151",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sullivan, IN",
    "epa_source_county_label": "Sullivan County",
    "county_or_equivalent_display": "Sullivan County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sullivan County",
    "census_2025_geoid": "18153",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Switzerland, IN",
    "epa_source_county_label": "Switzerland County",
    "county_or_equivalent_display": "Switzerland County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Switzerland County",
    "census_2025_geoid": "18155",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tippecanoe, IN",
    "epa_source_county_label": "Tippecanoe County",
    "county_or_equivalent_display": "Tippecanoe County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tippecanoe County",
    "census_2025_geoid": "18157",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tipton, IN",
    "epa_source_county_label": "Tipton County",
    "county_or_equivalent_display": "Tipton County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tipton County",
    "census_2025_geoid": "18159",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Union, IN",
    "epa_source_county_label": "Union County",
    "county_or_equivalent_display": "Union County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Union County",
    "census_2025_geoid": "18161",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Vanderburgh, IN",
    "epa_source_county_label": "Vanderburgh County",
    "county_or_equivalent_display": "Vanderburgh County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Vanderburgh County",
    "census_2025_geoid": "18163",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Vermillion, IN",
    "epa_source_county_label": "Vermillion County",
    "county_or_equivalent_display": "Vermillion County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Vermillion County",
    "census_2025_geoid": "18165",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Vigo, IN",
    "epa_source_county_label": "Vigo County",
    "county_or_equivalent_display": "Vigo County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Vigo County",
    "census_2025_geoid": "18167",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wabash, IN",
    "epa_source_county_label": "Wabash County",
    "county_or_equivalent_display": "Wabash County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wabash County",
    "census_2025_geoid": "18169",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Warren, IN",
    "epa_source_county_label": "Warren County",
    "county_or_equivalent_display": "Warren County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Warren County",
    "census_2025_geoid": "18171",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Warrick, IN",
    "epa_source_county_label": "Warrick County",
    "county_or_equivalent_display": "Warrick County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Warrick County",
    "census_2025_geoid": "18173",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washington, IN",
    "epa_source_county_label": "Washington County",
    "county_or_equivalent_display": "Washington County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washington County",
    "census_2025_geoid": "18175",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wayne, IN",
    "epa_source_county_label": "Wayne County",
    "county_or_equivalent_display": "Wayne County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wayne County",
    "census_2025_geoid": "18177",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wells, IN",
    "epa_source_county_label": "Wells County",
    "county_or_equivalent_display": "Wells County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wells County",
    "census_2025_geoid": "18179",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "White, IN",
    "epa_source_county_label": "White County",
    "county_or_equivalent_display": "White County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "White County",
    "census_2025_geoid": "18181",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Whitley, IN",
    "epa_source_county_label": "Whitley County",
    "county_or_equivalent_display": "Whitley County",
    "state_name": "Indiana",
    "state_abbreviation": "IN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Whitley County",
    "census_2025_geoid": "18183",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Adair, IA",
    "epa_source_county_label": "Adair County",
    "county_or_equivalent_display": "Adair County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Adair County",
    "census_2025_geoid": "19001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Adams, IA",
    "epa_source_county_label": "Adams County",
    "county_or_equivalent_display": "Adams County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Adams County",
    "census_2025_geoid": "19003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Allamakee, IA",
    "epa_source_county_label": "Allamakee County",
    "county_or_equivalent_display": "Allamakee County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Allamakee County",
    "census_2025_geoid": "19005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Appanoose, IA",
    "epa_source_county_label": "Appanoose County",
    "county_or_equivalent_display": "Appanoose County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Appanoose County",
    "census_2025_geoid": "19007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Audubon, IA",
    "epa_source_county_label": "Audubon County",
    "county_or_equivalent_display": "Audubon County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Audubon County",
    "census_2025_geoid": "19009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Benton, IA",
    "epa_source_county_label": "Benton County",
    "county_or_equivalent_display": "Benton County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Benton County",
    "census_2025_geoid": "19011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Black Hawk, IA",
    "epa_source_county_label": "Black Hawk County",
    "county_or_equivalent_display": "Black Hawk County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Black Hawk County",
    "census_2025_geoid": "19013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Boone, IA",
    "epa_source_county_label": "Boone County",
    "county_or_equivalent_display": "Boone County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Boone County",
    "census_2025_geoid": "19015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bremer, IA",
    "epa_source_county_label": "Bremer County",
    "county_or_equivalent_display": "Bremer County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bremer County",
    "census_2025_geoid": "19017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Buchanan, IA",
    "epa_source_county_label": "Buchanan County",
    "county_or_equivalent_display": "Buchanan County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Buchanan County",
    "census_2025_geoid": "19019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Buena Vista, IA",
    "epa_source_county_label": "Buena Vista County",
    "county_or_equivalent_display": "Buena Vista County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Buena Vista County",
    "census_2025_geoid": "19021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Butler, IA",
    "epa_source_county_label": "Butler County",
    "county_or_equivalent_display": "Butler County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Butler County",
    "census_2025_geoid": "19023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Calhoun, IA",
    "epa_source_county_label": "Calhoun County",
    "county_or_equivalent_display": "Calhoun County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Calhoun County",
    "census_2025_geoid": "19025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Carroll, IA",
    "epa_source_county_label": "Carroll County",
    "county_or_equivalent_display": "Carroll County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Carroll County",
    "census_2025_geoid": "19027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cass, IA",
    "epa_source_county_label": "Cass County",
    "county_or_equivalent_display": "Cass County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cass County",
    "census_2025_geoid": "19029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cedar, IA",
    "epa_source_county_label": "Cedar County",
    "county_or_equivalent_display": "Cedar County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cedar County",
    "census_2025_geoid": "19031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cerro Gordo, IA",
    "epa_source_county_label": "Cerro Gordo County",
    "county_or_equivalent_display": "Cerro Gordo County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cerro Gordo County",
    "census_2025_geoid": "19033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cherokee, IA",
    "epa_source_county_label": "Cherokee County",
    "county_or_equivalent_display": "Cherokee County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cherokee County",
    "census_2025_geoid": "19035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chickasaw, IA",
    "epa_source_county_label": "Chickasaw County",
    "county_or_equivalent_display": "Chickasaw County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chickasaw County",
    "census_2025_geoid": "19037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clarke, IA",
    "epa_source_county_label": "Clarke County",
    "county_or_equivalent_display": "Clarke County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clarke County",
    "census_2025_geoid": "19039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clay, IA",
    "epa_source_county_label": "Clay County",
    "county_or_equivalent_display": "Clay County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clay County",
    "census_2025_geoid": "19041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clayton, IA",
    "epa_source_county_label": "Clayton County",
    "county_or_equivalent_display": "Clayton County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clayton County",
    "census_2025_geoid": "19043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clinton, IA",
    "epa_source_county_label": "Clinton County",
    "county_or_equivalent_display": "Clinton County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clinton County",
    "census_2025_geoid": "19045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Crawford, IA",
    "epa_source_county_label": "Crawford County",
    "county_or_equivalent_display": "Crawford County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Crawford County",
    "census_2025_geoid": "19047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dallas, IA",
    "epa_source_county_label": "Dallas County",
    "county_or_equivalent_display": "Dallas County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dallas County",
    "census_2025_geoid": "19049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Davis, IA",
    "epa_source_county_label": "Davis County",
    "county_or_equivalent_display": "Davis County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Davis County",
    "census_2025_geoid": "19051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Decatur, IA",
    "epa_source_county_label": "Decatur County",
    "county_or_equivalent_display": "Decatur County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Decatur County",
    "census_2025_geoid": "19053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Delaware, IA",
    "epa_source_county_label": "Delaware County",
    "county_or_equivalent_display": "Delaware County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Delaware County",
    "census_2025_geoid": "19055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Des Moines, IA",
    "epa_source_county_label": "Des Moines County",
    "county_or_equivalent_display": "Des Moines County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Des Moines County",
    "census_2025_geoid": "19057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dickinson, IA",
    "epa_source_county_label": "Dickinson County",
    "county_or_equivalent_display": "Dickinson County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dickinson County",
    "census_2025_geoid": "19059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dubuque, IA",
    "epa_source_county_label": "Dubuque County",
    "county_or_equivalent_display": "Dubuque County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dubuque County",
    "census_2025_geoid": "19061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Emmet, IA",
    "epa_source_county_label": "Emmet County",
    "county_or_equivalent_display": "Emmet County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Emmet County",
    "census_2025_geoid": "19063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fayette, IA",
    "epa_source_county_label": "Fayette County",
    "county_or_equivalent_display": "Fayette County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fayette County",
    "census_2025_geoid": "19065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Floyd, IA",
    "epa_source_county_label": "Floyd County",
    "county_or_equivalent_display": "Floyd County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Floyd County",
    "census_2025_geoid": "19067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Franklin, IA",
    "epa_source_county_label": "Franklin County",
    "county_or_equivalent_display": "Franklin County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Franklin County",
    "census_2025_geoid": "19069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fremont, IA",
    "epa_source_county_label": "Fremont County",
    "county_or_equivalent_display": "Fremont County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fremont County",
    "census_2025_geoid": "19071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Greene, IA",
    "epa_source_county_label": "Greene County",
    "county_or_equivalent_display": "Greene County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Greene County",
    "census_2025_geoid": "19073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grundy, IA",
    "epa_source_county_label": "Grundy County",
    "county_or_equivalent_display": "Grundy County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grundy County",
    "census_2025_geoid": "19075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Guthrie, IA",
    "epa_source_county_label": "Guthrie County",
    "county_or_equivalent_display": "Guthrie County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Guthrie County",
    "census_2025_geoid": "19077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hamilton, IA",
    "epa_source_county_label": "Hamilton County",
    "county_or_equivalent_display": "Hamilton County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hamilton County",
    "census_2025_geoid": "19079",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hancock, IA",
    "epa_source_county_label": "Hancock County",
    "county_or_equivalent_display": "Hancock County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hancock County",
    "census_2025_geoid": "19081",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hardin, IA",
    "epa_source_county_label": "Hardin County",
    "county_or_equivalent_display": "Hardin County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hardin County",
    "census_2025_geoid": "19083",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Harrison, IA",
    "epa_source_county_label": "Harrison County",
    "county_or_equivalent_display": "Harrison County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Harrison County",
    "census_2025_geoid": "19085",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Henry, IA",
    "epa_source_county_label": "Henry County",
    "county_or_equivalent_display": "Henry County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Henry County",
    "census_2025_geoid": "19087",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Howard, IA",
    "epa_source_county_label": "Howard County",
    "county_or_equivalent_display": "Howard County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Howard County",
    "census_2025_geoid": "19089",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Humboldt, IA",
    "epa_source_county_label": "Humboldt County",
    "county_or_equivalent_display": "Humboldt County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Humboldt County",
    "census_2025_geoid": "19091",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ida, IA",
    "epa_source_county_label": "Ida County",
    "county_or_equivalent_display": "Ida County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ida County",
    "census_2025_geoid": "19093",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Iowa, IA",
    "epa_source_county_label": "Iowa County",
    "county_or_equivalent_display": "Iowa County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Iowa County",
    "census_2025_geoid": "19095",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jackson, IA",
    "epa_source_county_label": "Jackson County",
    "county_or_equivalent_display": "Jackson County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jackson County",
    "census_2025_geoid": "19097",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jasper, IA",
    "epa_source_county_label": "Jasper County",
    "county_or_equivalent_display": "Jasper County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jasper County",
    "census_2025_geoid": "19099",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jefferson, IA",
    "epa_source_county_label": "Jefferson County",
    "county_or_equivalent_display": "Jefferson County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jefferson County",
    "census_2025_geoid": "19101",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Johnson, IA",
    "epa_source_county_label": "Johnson County",
    "county_or_equivalent_display": "Johnson County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Johnson County",
    "census_2025_geoid": "19103",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jones, IA",
    "epa_source_county_label": "Jones County",
    "county_or_equivalent_display": "Jones County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jones County",
    "census_2025_geoid": "19105",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Keokuk, IA",
    "epa_source_county_label": "Keokuk County",
    "county_or_equivalent_display": "Keokuk County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Keokuk County",
    "census_2025_geoid": "19107",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kossuth, IA",
    "epa_source_county_label": "Kossuth County",
    "county_or_equivalent_display": "Kossuth County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kossuth County",
    "census_2025_geoid": "19109",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lee, IA",
    "epa_source_county_label": "Lee County",
    "county_or_equivalent_display": "Lee County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lee County",
    "census_2025_geoid": "19111",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Linn, IA",
    "epa_source_county_label": "Linn County",
    "county_or_equivalent_display": "Linn County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Linn County",
    "census_2025_geoid": "19113",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "True",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Louisa, IA",
    "epa_source_county_label": "Louisa County",
    "county_or_equivalent_display": "Louisa County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Louisa County",
    "census_2025_geoid": "19115",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lucas, IA",
    "epa_source_county_label": "Lucas County",
    "county_or_equivalent_display": "Lucas County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lucas County",
    "census_2025_geoid": "19117",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lyon, IA",
    "epa_source_county_label": "Lyon County",
    "county_or_equivalent_display": "Lyon County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lyon County",
    "census_2025_geoid": "19119",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Madison, IA",
    "epa_source_county_label": "Madison County",
    "county_or_equivalent_display": "Madison County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Madison County",
    "census_2025_geoid": "19121",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mahaska, IA",
    "epa_source_county_label": "Mahaska County",
    "county_or_equivalent_display": "Mahaska County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mahaska County",
    "census_2025_geoid": "19123",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marion, IA",
    "epa_source_county_label": "Marion County",
    "county_or_equivalent_display": "Marion County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marion County",
    "census_2025_geoid": "19125",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marshall, IA",
    "epa_source_county_label": "Marshall County",
    "county_or_equivalent_display": "Marshall County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marshall County",
    "census_2025_geoid": "19127",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mills, IA",
    "epa_source_county_label": "Mills County",
    "county_or_equivalent_display": "Mills County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mills County",
    "census_2025_geoid": "19129",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mitchell, IA",
    "epa_source_county_label": "Mitchell County",
    "county_or_equivalent_display": "Mitchell County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mitchell County",
    "census_2025_geoid": "19131",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Monona, IA",
    "epa_source_county_label": "Monona County",
    "county_or_equivalent_display": "Monona County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Monona County",
    "census_2025_geoid": "19133",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Monroe, IA",
    "epa_source_county_label": "Monroe County",
    "county_or_equivalent_display": "Monroe County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Monroe County",
    "census_2025_geoid": "19135",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Montgomery, IA",
    "epa_source_county_label": "Montgomery County",
    "county_or_equivalent_display": "Montgomery County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Montgomery County",
    "census_2025_geoid": "19137",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Muscatine, IA",
    "epa_source_county_label": "Muscatine County",
    "county_or_equivalent_display": "Muscatine County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Muscatine County",
    "census_2025_geoid": "19139",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "O'Brien, IA",
    "epa_source_county_label": "O'Brien County",
    "county_or_equivalent_display": "O'Brien County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "O'Brien County",
    "census_2025_geoid": "19141",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Osceola, IA",
    "epa_source_county_label": "Osceola County",
    "county_or_equivalent_display": "Osceola County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Osceola County",
    "census_2025_geoid": "19143",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Page, IA",
    "epa_source_county_label": "Page County",
    "county_or_equivalent_display": "Page County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Page County",
    "census_2025_geoid": "19145",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Palo Alto, IA",
    "epa_source_county_label": "Palo Alto County",
    "county_or_equivalent_display": "Palo Alto County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Palo Alto County",
    "census_2025_geoid": "19147",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Plymouth, IA",
    "epa_source_county_label": "Plymouth County",
    "county_or_equivalent_display": "Plymouth County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Plymouth County",
    "census_2025_geoid": "19149",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pocahontas, IA",
    "epa_source_county_label": "Pocahontas County",
    "county_or_equivalent_display": "Pocahontas County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pocahontas County",
    "census_2025_geoid": "19151",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Polk, IA",
    "epa_source_county_label": "Polk County",
    "county_or_equivalent_display": "Polk County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Polk County",
    "census_2025_geoid": "19153",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pottawattamie, IA",
    "epa_source_county_label": "Pottawattamie County",
    "county_or_equivalent_display": "Pottawattamie County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pottawattamie County",
    "census_2025_geoid": "19155",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Poweshiek, IA",
    "epa_source_county_label": "Poweshiek County",
    "county_or_equivalent_display": "Poweshiek County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Poweshiek County",
    "census_2025_geoid": "19157",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ringgold, IA",
    "epa_source_county_label": "Ringgold County",
    "county_or_equivalent_display": "Ringgold County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ringgold County",
    "census_2025_geoid": "19159",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sac, IA",
    "epa_source_county_label": "Sac County",
    "county_or_equivalent_display": "Sac County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sac County",
    "census_2025_geoid": "19161",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Scott, IA",
    "epa_source_county_label": "Scott County",
    "county_or_equivalent_display": "Scott County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Scott County",
    "census_2025_geoid": "19163",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Shelby, IA",
    "epa_source_county_label": "Shelby County",
    "county_or_equivalent_display": "Shelby County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Shelby County",
    "census_2025_geoid": "19165",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sioux, IA",
    "epa_source_county_label": "Sioux County",
    "county_or_equivalent_display": "Sioux County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sioux County",
    "census_2025_geoid": "19167",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Story, IA",
    "epa_source_county_label": "Story County",
    "county_or_equivalent_display": "Story County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Story County",
    "census_2025_geoid": "19169",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tama, IA",
    "epa_source_county_label": "Tama County",
    "county_or_equivalent_display": "Tama County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tama County",
    "census_2025_geoid": "19171",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Taylor, IA",
    "epa_source_county_label": "Taylor County",
    "county_or_equivalent_display": "Taylor County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Taylor County",
    "census_2025_geoid": "19173",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Union, IA",
    "epa_source_county_label": "Union County",
    "county_or_equivalent_display": "Union County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Union County",
    "census_2025_geoid": "19175",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Van Buren, IA",
    "epa_source_county_label": "Van Buren County",
    "county_or_equivalent_display": "Van Buren County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Van Buren County",
    "census_2025_geoid": "19177",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wapello, IA",
    "epa_source_county_label": "Wapello County",
    "county_or_equivalent_display": "Wapello County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wapello County",
    "census_2025_geoid": "19179",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Warren, IA",
    "epa_source_county_label": "Warren County",
    "county_or_equivalent_display": "Warren County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Warren County",
    "census_2025_geoid": "19181",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washington, IA",
    "epa_source_county_label": "Washington County",
    "county_or_equivalent_display": "Washington County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washington County",
    "census_2025_geoid": "19183",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wayne, IA",
    "epa_source_county_label": "Wayne County",
    "county_or_equivalent_display": "Wayne County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wayne County",
    "census_2025_geoid": "19185",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Webster, IA",
    "epa_source_county_label": "Webster County",
    "county_or_equivalent_display": "Webster County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Webster County",
    "census_2025_geoid": "19187",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Winnebago, IA",
    "epa_source_county_label": "Winnebago County",
    "county_or_equivalent_display": "Winnebago County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Winnebago County",
    "census_2025_geoid": "19189",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Winneshiek, IA",
    "epa_source_county_label": "Winneshiek County",
    "county_or_equivalent_display": "Winneshiek County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Winneshiek County",
    "census_2025_geoid": "19191",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Woodbury, IA",
    "epa_source_county_label": "Woodbury County",
    "county_or_equivalent_display": "Woodbury County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Woodbury County",
    "census_2025_geoid": "19193",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Worth, IA",
    "epa_source_county_label": "Worth County",
    "county_or_equivalent_display": "Worth County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Worth County",
    "census_2025_geoid": "19195",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wright, IA",
    "epa_source_county_label": "Wright County",
    "county_or_equivalent_display": "Wright County",
    "state_name": "Iowa",
    "state_abbreviation": "IA",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wright County",
    "census_2025_geoid": "19197",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "True",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Allen, KS",
    "epa_source_county_label": "Allen County",
    "county_or_equivalent_display": "Allen County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Allen County",
    "census_2025_geoid": "20001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Anderson, KS",
    "epa_source_county_label": "Anderson County",
    "county_or_equivalent_display": "Anderson County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Anderson County",
    "census_2025_geoid": "20003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Atchison, KS",
    "epa_source_county_label": "Atchison County",
    "county_or_equivalent_display": "Atchison County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Atchison County",
    "census_2025_geoid": "20005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Barber, KS",
    "epa_source_county_label": "Barber County",
    "county_or_equivalent_display": "Barber County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Barber County",
    "census_2025_geoid": "20007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Barton, KS",
    "epa_source_county_label": "Barton County",
    "county_or_equivalent_display": "Barton County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Barton County",
    "census_2025_geoid": "20009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bourbon, KS",
    "epa_source_county_label": "Bourbon County",
    "county_or_equivalent_display": "Bourbon County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bourbon County",
    "census_2025_geoid": "20011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Brown, KS",
    "epa_source_county_label": "Brown County",
    "county_or_equivalent_display": "Brown County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Brown County",
    "census_2025_geoid": "20013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Butler, KS",
    "epa_source_county_label": "Butler County",
    "county_or_equivalent_display": "Butler County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Butler County",
    "census_2025_geoid": "20015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chase, KS",
    "epa_source_county_label": "Chase County",
    "county_or_equivalent_display": "Chase County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chase County",
    "census_2025_geoid": "20017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chautauqua, KS",
    "epa_source_county_label": "Chautauqua County",
    "county_or_equivalent_display": "Chautauqua County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chautauqua County",
    "census_2025_geoid": "20019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cherokee, KS",
    "epa_source_county_label": "Cherokee County",
    "county_or_equivalent_display": "Cherokee County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cherokee County",
    "census_2025_geoid": "20021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cheyenne, KS",
    "epa_source_county_label": "Cheyenne County",
    "county_or_equivalent_display": "Cheyenne County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cheyenne County",
    "census_2025_geoid": "20023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clark, KS",
    "epa_source_county_label": "Clark County",
    "county_or_equivalent_display": "Clark County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clark County",
    "census_2025_geoid": "20025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clay, KS",
    "epa_source_county_label": "Clay County",
    "county_or_equivalent_display": "Clay County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clay County",
    "census_2025_geoid": "20027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cloud, KS",
    "epa_source_county_label": "Cloud County",
    "county_or_equivalent_display": "Cloud County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cloud County",
    "census_2025_geoid": "20029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Coffey, KS",
    "epa_source_county_label": "Coffey County",
    "county_or_equivalent_display": "Coffey County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Coffey County",
    "census_2025_geoid": "20031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Comanche, KS",
    "epa_source_county_label": "Comanche County",
    "county_or_equivalent_display": "Comanche County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Comanche County",
    "census_2025_geoid": "20033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cowley, KS",
    "epa_source_county_label": "Cowley County",
    "county_or_equivalent_display": "Cowley County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cowley County",
    "census_2025_geoid": "20035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Crawford, KS",
    "epa_source_county_label": "Crawford County",
    "county_or_equivalent_display": "Crawford County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Crawford County",
    "census_2025_geoid": "20037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Decatur, KS",
    "epa_source_county_label": "Decatur County",
    "county_or_equivalent_display": "Decatur County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Decatur County",
    "census_2025_geoid": "20039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dickinson, KS",
    "epa_source_county_label": "Dickinson County",
    "county_or_equivalent_display": "Dickinson County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dickinson County",
    "census_2025_geoid": "20041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Doniphan, KS",
    "epa_source_county_label": "Doniphan County",
    "county_or_equivalent_display": "Doniphan County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Doniphan County",
    "census_2025_geoid": "20043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Douglas, KS",
    "epa_source_county_label": "Douglas County",
    "county_or_equivalent_display": "Douglas County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Douglas County",
    "census_2025_geoid": "20045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Edwards, KS",
    "epa_source_county_label": "Edwards County",
    "county_or_equivalent_display": "Edwards County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Edwards County",
    "census_2025_geoid": "20047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Elk, KS",
    "epa_source_county_label": "Elk County",
    "county_or_equivalent_display": "Elk County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Elk County",
    "census_2025_geoid": "20049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ellis, KS",
    "epa_source_county_label": "Ellis County",
    "county_or_equivalent_display": "Ellis County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ellis County",
    "census_2025_geoid": "20051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ellsworth, KS",
    "epa_source_county_label": "Ellsworth County",
    "county_or_equivalent_display": "Ellsworth County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ellsworth County",
    "census_2025_geoid": "20053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Finney, KS",
    "epa_source_county_label": "Finney County",
    "county_or_equivalent_display": "Finney County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Finney County",
    "census_2025_geoid": "20055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ford, KS",
    "epa_source_county_label": "Ford County",
    "county_or_equivalent_display": "Ford County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ford County",
    "census_2025_geoid": "20057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Franklin, KS",
    "epa_source_county_label": "Franklin County",
    "county_or_equivalent_display": "Franklin County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Franklin County",
    "census_2025_geoid": "20059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Geary, KS",
    "epa_source_county_label": "Geary County",
    "county_or_equivalent_display": "Geary County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Geary County",
    "census_2025_geoid": "20061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gove, KS",
    "epa_source_county_label": "Gove County",
    "county_or_equivalent_display": "Gove County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gove County",
    "census_2025_geoid": "20063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Graham, KS",
    "epa_source_county_label": "Graham County",
    "county_or_equivalent_display": "Graham County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Graham County",
    "census_2025_geoid": "20065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grant, KS",
    "epa_source_county_label": "Grant County",
    "county_or_equivalent_display": "Grant County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grant County",
    "census_2025_geoid": "20067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gray, KS",
    "epa_source_county_label": "Gray County",
    "county_or_equivalent_display": "Gray County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gray County",
    "census_2025_geoid": "20069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Greeley, KS",
    "epa_source_county_label": "Greeley County",
    "county_or_equivalent_display": "Greeley County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Greeley County",
    "census_2025_geoid": "20071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Greenwood, KS",
    "epa_source_county_label": "Greenwood County",
    "county_or_equivalent_display": "Greenwood County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Greenwood County",
    "census_2025_geoid": "20073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hamilton, KS",
    "epa_source_county_label": "Hamilton County",
    "county_or_equivalent_display": "Hamilton County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hamilton County",
    "census_2025_geoid": "20075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Harper, KS",
    "epa_source_county_label": "Harper County",
    "county_or_equivalent_display": "Harper County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Harper County",
    "census_2025_geoid": "20077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Harvey, KS",
    "epa_source_county_label": "Harvey County",
    "county_or_equivalent_display": "Harvey County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Harvey County",
    "census_2025_geoid": "20079",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Haskell, KS",
    "epa_source_county_label": "Haskell County",
    "county_or_equivalent_display": "Haskell County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Haskell County",
    "census_2025_geoid": "20081",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hodgeman, KS",
    "epa_source_county_label": "Hodgeman County",
    "county_or_equivalent_display": "Hodgeman County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hodgeman County",
    "census_2025_geoid": "20083",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jackson, KS",
    "epa_source_county_label": "Jackson County",
    "county_or_equivalent_display": "Jackson County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jackson County",
    "census_2025_geoid": "20085",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jefferson, KS",
    "epa_source_county_label": "Jefferson County",
    "county_or_equivalent_display": "Jefferson County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jefferson County",
    "census_2025_geoid": "20087",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jewell, KS",
    "epa_source_county_label": "Jewell County",
    "county_or_equivalent_display": "Jewell County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jewell County",
    "census_2025_geoid": "20089",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Johnson, KS",
    "epa_source_county_label": "Johnson County",
    "county_or_equivalent_display": "Johnson County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Johnson County",
    "census_2025_geoid": "20091",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kearny, KS",
    "epa_source_county_label": "Kearny County",
    "county_or_equivalent_display": "Kearny County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kearny County",
    "census_2025_geoid": "20093",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kingman, KS",
    "epa_source_county_label": "Kingman County",
    "county_or_equivalent_display": "Kingman County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kingman County",
    "census_2025_geoid": "20095",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kiowa, KS",
    "epa_source_county_label": "Kiowa County",
    "county_or_equivalent_display": "Kiowa County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kiowa County",
    "census_2025_geoid": "20097",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Labette, KS",
    "epa_source_county_label": "Labette County",
    "county_or_equivalent_display": "Labette County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Labette County",
    "census_2025_geoid": "20099",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lane, KS",
    "epa_source_county_label": "Lane County",
    "county_or_equivalent_display": "Lane County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lane County",
    "census_2025_geoid": "20101",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Leavenworth, KS",
    "epa_source_county_label": "Leavenworth County",
    "county_or_equivalent_display": "Leavenworth County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Leavenworth County",
    "census_2025_geoid": "20103",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lincoln, KS",
    "epa_source_county_label": "Lincoln County",
    "county_or_equivalent_display": "Lincoln County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lincoln County",
    "census_2025_geoid": "20105",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Linn, KS",
    "epa_source_county_label": "Linn County",
    "county_or_equivalent_display": "Linn County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Linn County",
    "census_2025_geoid": "20107",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Logan, KS",
    "epa_source_county_label": "Logan County",
    "county_or_equivalent_display": "Logan County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Logan County",
    "census_2025_geoid": "20109",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lyon, KS",
    "epa_source_county_label": "Lyon County",
    "county_or_equivalent_display": "Lyon County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lyon County",
    "census_2025_geoid": "20111",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marion, KS",
    "epa_source_county_label": "Marion County",
    "county_or_equivalent_display": "Marion County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marion County",
    "census_2025_geoid": "20115",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marshall, KS",
    "epa_source_county_label": "Marshall County",
    "county_or_equivalent_display": "Marshall County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marshall County",
    "census_2025_geoid": "20117",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "McPherson, KS",
    "epa_source_county_label": "McPherson County",
    "county_or_equivalent_display": "McPherson County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "McPherson County",
    "census_2025_geoid": "20113",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Meade, KS",
    "epa_source_county_label": "Meade County",
    "county_or_equivalent_display": "Meade County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Meade County",
    "census_2025_geoid": "20119",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Miami, KS",
    "epa_source_county_label": "Miami County",
    "county_or_equivalent_display": "Miami County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Miami County",
    "census_2025_geoid": "20121",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mitchell, KS",
    "epa_source_county_label": "Mitchell County",
    "county_or_equivalent_display": "Mitchell County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mitchell County",
    "census_2025_geoid": "20123",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Montgomery, KS",
    "epa_source_county_label": "Montgomery County",
    "county_or_equivalent_display": "Montgomery County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Montgomery County",
    "census_2025_geoid": "20125",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Morris, KS",
    "epa_source_county_label": "Morris County",
    "county_or_equivalent_display": "Morris County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Morris County",
    "census_2025_geoid": "20127",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Morton, KS",
    "epa_source_county_label": "Morton County",
    "county_or_equivalent_display": "Morton County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Morton County",
    "census_2025_geoid": "20129",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Nemaha, KS",
    "epa_source_county_label": "Nemaha County",
    "county_or_equivalent_display": "Nemaha County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Nemaha County",
    "census_2025_geoid": "20131",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Neosho, KS",
    "epa_source_county_label": "Neosho County",
    "county_or_equivalent_display": "Neosho County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Neosho County",
    "census_2025_geoid": "20133",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ness, KS",
    "epa_source_county_label": "Ness County",
    "county_or_equivalent_display": "Ness County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ness County",
    "census_2025_geoid": "20135",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Norton, KS",
    "epa_source_county_label": "Norton County",
    "county_or_equivalent_display": "Norton County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Norton County",
    "census_2025_geoid": "20137",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Osage, KS",
    "epa_source_county_label": "Osage County",
    "county_or_equivalent_display": "Osage County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Osage County",
    "census_2025_geoid": "20139",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Osborne, KS",
    "epa_source_county_label": "Osborne County",
    "county_or_equivalent_display": "Osborne County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Osborne County",
    "census_2025_geoid": "20141",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ottawa, KS",
    "epa_source_county_label": "Ottawa County",
    "county_or_equivalent_display": "Ottawa County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ottawa County",
    "census_2025_geoid": "20143",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pawnee, KS",
    "epa_source_county_label": "Pawnee County",
    "county_or_equivalent_display": "Pawnee County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pawnee County",
    "census_2025_geoid": "20145",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Phillips, KS",
    "epa_source_county_label": "Phillips County",
    "county_or_equivalent_display": "Phillips County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Phillips County",
    "census_2025_geoid": "20147",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pottawatomie, KS",
    "epa_source_county_label": "Pottawatomie County",
    "county_or_equivalent_display": "Pottawatomie County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pottawatomie County",
    "census_2025_geoid": "20149",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pratt, KS",
    "epa_source_county_label": "Pratt County",
    "county_or_equivalent_display": "Pratt County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pratt County",
    "census_2025_geoid": "20151",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rawlins, KS",
    "epa_source_county_label": "Rawlins County",
    "county_or_equivalent_display": "Rawlins County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rawlins County",
    "census_2025_geoid": "20153",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Reno, KS",
    "epa_source_county_label": "Reno County",
    "county_or_equivalent_display": "Reno County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Reno County",
    "census_2025_geoid": "20155",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Republic, KS",
    "epa_source_county_label": "Republic County",
    "county_or_equivalent_display": "Republic County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Republic County",
    "census_2025_geoid": "20157",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rice, KS",
    "epa_source_county_label": "Rice County",
    "county_or_equivalent_display": "Rice County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rice County",
    "census_2025_geoid": "20159",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Riley, KS",
    "epa_source_county_label": "Riley County",
    "county_or_equivalent_display": "Riley County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Riley County",
    "census_2025_geoid": "20161",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rooks, KS",
    "epa_source_county_label": "Rooks County",
    "county_or_equivalent_display": "Rooks County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rooks County",
    "census_2025_geoid": "20163",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rush, KS",
    "epa_source_county_label": "Rush County",
    "county_or_equivalent_display": "Rush County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rush County",
    "census_2025_geoid": "20165",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Russell, KS",
    "epa_source_county_label": "Russell County",
    "county_or_equivalent_display": "Russell County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Russell County",
    "census_2025_geoid": "20167",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Saline, KS",
    "epa_source_county_label": "Saline County",
    "county_or_equivalent_display": "Saline County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Saline County",
    "census_2025_geoid": "20169",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Scott, KS",
    "epa_source_county_label": "Scott County",
    "county_or_equivalent_display": "Scott County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Scott County",
    "census_2025_geoid": "20171",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sedgwick, KS",
    "epa_source_county_label": "Sedgwick County",
    "county_or_equivalent_display": "Sedgwick County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sedgwick County",
    "census_2025_geoid": "20173",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Seward, KS",
    "epa_source_county_label": "Seward County",
    "county_or_equivalent_display": "Seward County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Seward County",
    "census_2025_geoid": "20175",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Shawnee, KS",
    "epa_source_county_label": "Shawnee County",
    "county_or_equivalent_display": "Shawnee County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Shawnee County",
    "census_2025_geoid": "20177",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sheridan, KS",
    "epa_source_county_label": "Sheridan County",
    "county_or_equivalent_display": "Sheridan County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sheridan County",
    "census_2025_geoid": "20179",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sherman, KS",
    "epa_source_county_label": "Sherman County",
    "county_or_equivalent_display": "Sherman County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sherman County",
    "census_2025_geoid": "20181",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Smith, KS",
    "epa_source_county_label": "Smith County",
    "county_or_equivalent_display": "Smith County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Smith County",
    "census_2025_geoid": "20183",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Stafford, KS",
    "epa_source_county_label": "Stafford County",
    "county_or_equivalent_display": "Stafford County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Stafford County",
    "census_2025_geoid": "20185",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Stanton, KS",
    "epa_source_county_label": "Stanton County",
    "county_or_equivalent_display": "Stanton County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Stanton County",
    "census_2025_geoid": "20187",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Stevens, KS",
    "epa_source_county_label": "Stevens County",
    "county_or_equivalent_display": "Stevens County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Stevens County",
    "census_2025_geoid": "20189",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sumner, KS",
    "epa_source_county_label": "Sumner County",
    "county_or_equivalent_display": "Sumner County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sumner County",
    "census_2025_geoid": "20191",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Thomas, KS",
    "epa_source_county_label": "Thomas County",
    "county_or_equivalent_display": "Thomas County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Thomas County",
    "census_2025_geoid": "20193",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Trego, KS",
    "epa_source_county_label": "Trego County",
    "county_or_equivalent_display": "Trego County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Trego County",
    "census_2025_geoid": "20195",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wabaunsee, KS",
    "epa_source_county_label": "Wabaunsee County",
    "county_or_equivalent_display": "Wabaunsee County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wabaunsee County",
    "census_2025_geoid": "20197",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wallace, KS",
    "epa_source_county_label": "Wallace County",
    "county_or_equivalent_display": "Wallace County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wallace County",
    "census_2025_geoid": "20199",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washington, KS",
    "epa_source_county_label": "Washington County",
    "county_or_equivalent_display": "Washington County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washington County",
    "census_2025_geoid": "20201",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wichita, KS",
    "epa_source_county_label": "Wichita County",
    "county_or_equivalent_display": "Wichita County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wichita County",
    "census_2025_geoid": "20203",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wilson, KS",
    "epa_source_county_label": "Wilson County",
    "county_or_equivalent_display": "Wilson County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wilson County",
    "census_2025_geoid": "20205",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Woodson, KS",
    "epa_source_county_label": "Woodson County",
    "county_or_equivalent_display": "Woodson County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Woodson County",
    "census_2025_geoid": "20207",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wyandotte, KS",
    "epa_source_county_label": "Wyandotte County",
    "county_or_equivalent_display": "Wyandotte County",
    "state_name": "Kansas",
    "state_abbreviation": "KS",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wyandotte County",
    "census_2025_geoid": "20209",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Adair, KY",
    "epa_source_county_label": "Adair County",
    "county_or_equivalent_display": "Adair County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Adair County",
    "census_2025_geoid": "21001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Allen, KY",
    "epa_source_county_label": "Allen County",
    "county_or_equivalent_display": "Allen County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Allen County",
    "census_2025_geoid": "21003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Anderson, KY",
    "epa_source_county_label": "Anderson County",
    "county_or_equivalent_display": "Anderson County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Anderson County",
    "census_2025_geoid": "21005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ballard, KY",
    "epa_source_county_label": "Ballard County",
    "county_or_equivalent_display": "Ballard County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ballard County",
    "census_2025_geoid": "21007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Barren, KY",
    "epa_source_county_label": "Barren County",
    "county_or_equivalent_display": "Barren County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Barren County",
    "census_2025_geoid": "21009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bath, KY",
    "epa_source_county_label": "Bath County",
    "county_or_equivalent_display": "Bath County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bath County",
    "census_2025_geoid": "21011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bell, KY",
    "epa_source_county_label": "Bell County",
    "county_or_equivalent_display": "Bell County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bell County",
    "census_2025_geoid": "21013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Boone, KY",
    "epa_source_county_label": "Boone County",
    "county_or_equivalent_display": "Boone County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Boone County",
    "census_2025_geoid": "21015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bourbon, KY",
    "epa_source_county_label": "Bourbon County",
    "county_or_equivalent_display": "Bourbon County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bourbon County",
    "census_2025_geoid": "21017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Boyd, KY",
    "epa_source_county_label": "Boyd County",
    "county_or_equivalent_display": "Boyd County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Boyd County",
    "census_2025_geoid": "21019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Boyle, KY",
    "epa_source_county_label": "Boyle County",
    "county_or_equivalent_display": "Boyle County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Boyle County",
    "census_2025_geoid": "21021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bracken, KY",
    "epa_source_county_label": "Bracken County",
    "county_or_equivalent_display": "Bracken County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bracken County",
    "census_2025_geoid": "21023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Breathitt, KY",
    "epa_source_county_label": "Breathitt County",
    "county_or_equivalent_display": "Breathitt County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Breathitt County",
    "census_2025_geoid": "21025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Breckinridge, KY",
    "epa_source_county_label": "Breckinridge County",
    "county_or_equivalent_display": "Breckinridge County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Breckinridge County",
    "census_2025_geoid": "21027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bullitt, KY",
    "epa_source_county_label": "Bullitt County",
    "county_or_equivalent_display": "Bullitt County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bullitt County",
    "census_2025_geoid": "21029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Butler, KY",
    "epa_source_county_label": "Butler County",
    "county_or_equivalent_display": "Butler County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Butler County",
    "census_2025_geoid": "21031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Caldwell, KY",
    "epa_source_county_label": "Caldwell County",
    "county_or_equivalent_display": "Caldwell County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Caldwell County",
    "census_2025_geoid": "21033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Calloway, KY",
    "epa_source_county_label": "Calloway County",
    "county_or_equivalent_display": "Calloway County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Calloway County",
    "census_2025_geoid": "21035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Campbell, KY",
    "epa_source_county_label": "Campbell County",
    "county_or_equivalent_display": "Campbell County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Campbell County",
    "census_2025_geoid": "21037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Carlisle, KY",
    "epa_source_county_label": "Carlisle County",
    "county_or_equivalent_display": "Carlisle County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Carlisle County",
    "census_2025_geoid": "21039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Carroll, KY",
    "epa_source_county_label": "Carroll County",
    "county_or_equivalent_display": "Carroll County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Carroll County",
    "census_2025_geoid": "21041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Carter, KY",
    "epa_source_county_label": "Carter County",
    "county_or_equivalent_display": "Carter County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Carter County",
    "census_2025_geoid": "21043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Casey, KY",
    "epa_source_county_label": "Casey County",
    "county_or_equivalent_display": "Casey County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Casey County",
    "census_2025_geoid": "21045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Christian, KY",
    "epa_source_county_label": "Christian County",
    "county_or_equivalent_display": "Christian County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Christian County",
    "census_2025_geoid": "21047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clark, KY",
    "epa_source_county_label": "Clark County",
    "county_or_equivalent_display": "Clark County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clark County",
    "census_2025_geoid": "21049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clay, KY",
    "epa_source_county_label": "Clay County",
    "county_or_equivalent_display": "Clay County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clay County",
    "census_2025_geoid": "21051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clinton, KY",
    "epa_source_county_label": "Clinton County",
    "county_or_equivalent_display": "Clinton County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clinton County",
    "census_2025_geoid": "21053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Crittenden, KY",
    "epa_source_county_label": "Crittenden County",
    "county_or_equivalent_display": "Crittenden County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Crittenden County",
    "census_2025_geoid": "21055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cumberland, KY",
    "epa_source_county_label": "Cumberland County",
    "county_or_equivalent_display": "Cumberland County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cumberland County",
    "census_2025_geoid": "21057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Daviess, KY",
    "epa_source_county_label": "Daviess County",
    "county_or_equivalent_display": "Daviess County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Daviess County",
    "census_2025_geoid": "21059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Edmonson, KY",
    "epa_source_county_label": "Edmonson County",
    "county_or_equivalent_display": "Edmonson County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Edmonson County",
    "census_2025_geoid": "21061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Elliott, KY",
    "epa_source_county_label": "Elliott County",
    "county_or_equivalent_display": "Elliott County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Elliott County",
    "census_2025_geoid": "21063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Estill, KY",
    "epa_source_county_label": "Estill County",
    "county_or_equivalent_display": "Estill County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Estill County",
    "census_2025_geoid": "21065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fayette, KY",
    "epa_source_county_label": "Fayette County",
    "county_or_equivalent_display": "Fayette County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fayette County",
    "census_2025_geoid": "21067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fleming, KY",
    "epa_source_county_label": "Fleming County",
    "county_or_equivalent_display": "Fleming County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fleming County",
    "census_2025_geoid": "21069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Floyd, KY",
    "epa_source_county_label": "Floyd County",
    "county_or_equivalent_display": "Floyd County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Floyd County",
    "census_2025_geoid": "21071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Franklin, KY",
    "epa_source_county_label": "Franklin County",
    "county_or_equivalent_display": "Franklin County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Franklin County",
    "census_2025_geoid": "21073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fulton, KY",
    "epa_source_county_label": "Fulton County",
    "county_or_equivalent_display": "Fulton County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fulton County",
    "census_2025_geoid": "21075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gallatin, KY",
    "epa_source_county_label": "Gallatin County",
    "county_or_equivalent_display": "Gallatin County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gallatin County",
    "census_2025_geoid": "21077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Garrard, KY",
    "epa_source_county_label": "Garrard County",
    "county_or_equivalent_display": "Garrard County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Garrard County",
    "census_2025_geoid": "21079",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grant, KY",
    "epa_source_county_label": "Grant County",
    "county_or_equivalent_display": "Grant County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grant County",
    "census_2025_geoid": "21081",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Graves, KY",
    "epa_source_county_label": "Graves County",
    "county_or_equivalent_display": "Graves County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Graves County",
    "census_2025_geoid": "21083",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grayson, KY",
    "epa_source_county_label": "Grayson County",
    "county_or_equivalent_display": "Grayson County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grayson County",
    "census_2025_geoid": "21085",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Green, KY",
    "epa_source_county_label": "Green County",
    "county_or_equivalent_display": "Green County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Green County",
    "census_2025_geoid": "21087",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Greenup, KY",
    "epa_source_county_label": "Greenup County",
    "county_or_equivalent_display": "Greenup County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Greenup County",
    "census_2025_geoid": "21089",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hancock, KY",
    "epa_source_county_label": "Hancock County",
    "county_or_equivalent_display": "Hancock County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hancock County",
    "census_2025_geoid": "21091",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hardin, KY",
    "epa_source_county_label": "Hardin County",
    "county_or_equivalent_display": "Hardin County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hardin County",
    "census_2025_geoid": "21093",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Harlan, KY",
    "epa_source_county_label": "Harlan County",
    "county_or_equivalent_display": "Harlan County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Harlan County",
    "census_2025_geoid": "21095",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Harrison, KY",
    "epa_source_county_label": "Harrison County",
    "county_or_equivalent_display": "Harrison County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Harrison County",
    "census_2025_geoid": "21097",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hart, KY",
    "epa_source_county_label": "Hart County",
    "county_or_equivalent_display": "Hart County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hart County",
    "census_2025_geoid": "21099",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Henderson, KY",
    "epa_source_county_label": "Henderson County",
    "county_or_equivalent_display": "Henderson County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Henderson County",
    "census_2025_geoid": "21101",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Henry, KY",
    "epa_source_county_label": "Henry County",
    "county_or_equivalent_display": "Henry County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Henry County",
    "census_2025_geoid": "21103",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hickman, KY",
    "epa_source_county_label": "Hickman County",
    "county_or_equivalent_display": "Hickman County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hickman County",
    "census_2025_geoid": "21105",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hopkins, KY",
    "epa_source_county_label": "Hopkins County",
    "county_or_equivalent_display": "Hopkins County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hopkins County",
    "census_2025_geoid": "21107",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jackson, KY",
    "epa_source_county_label": "Jackson County",
    "county_or_equivalent_display": "Jackson County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jackson County",
    "census_2025_geoid": "21109",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jefferson, KY",
    "epa_source_county_label": "Jefferson County",
    "county_or_equivalent_display": "Jefferson County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jefferson County",
    "census_2025_geoid": "21111",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jessamine, KY",
    "epa_source_county_label": "Jessamine County",
    "county_or_equivalent_display": "Jessamine County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jessamine County",
    "census_2025_geoid": "21113",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Johnson, KY",
    "epa_source_county_label": "Johnson County",
    "county_or_equivalent_display": "Johnson County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Johnson County",
    "census_2025_geoid": "21115",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kenton, KY",
    "epa_source_county_label": "Kenton County",
    "county_or_equivalent_display": "Kenton County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kenton County",
    "census_2025_geoid": "21117",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Knott, KY",
    "epa_source_county_label": "Knott County",
    "county_or_equivalent_display": "Knott County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Knott County",
    "census_2025_geoid": "21119",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Knox, KY",
    "epa_source_county_label": "Knox County",
    "county_or_equivalent_display": "Knox County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Knox County",
    "census_2025_geoid": "21121",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Larue, KY",
    "epa_source_county_label": "Larue County",
    "county_or_equivalent_display": "Larue County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Larue County",
    "census_2025_geoid": "21123",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Laurel, KY",
    "epa_source_county_label": "Laurel County",
    "county_or_equivalent_display": "Laurel County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Laurel County",
    "census_2025_geoid": "21125",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lawrence, KY",
    "epa_source_county_label": "Lawrence County",
    "county_or_equivalent_display": "Lawrence County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lawrence County",
    "census_2025_geoid": "21127",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lee, KY",
    "epa_source_county_label": "Lee County",
    "county_or_equivalent_display": "Lee County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lee County",
    "census_2025_geoid": "21129",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Leslie, KY",
    "epa_source_county_label": "Leslie County",
    "county_or_equivalent_display": "Leslie County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Leslie County",
    "census_2025_geoid": "21131",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Letcher, KY",
    "epa_source_county_label": "Letcher County",
    "county_or_equivalent_display": "Letcher County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Letcher County",
    "census_2025_geoid": "21133",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lewis, KY",
    "epa_source_county_label": "Lewis County",
    "county_or_equivalent_display": "Lewis County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lewis County",
    "census_2025_geoid": "21135",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lincoln, KY",
    "epa_source_county_label": "Lincoln County",
    "county_or_equivalent_display": "Lincoln County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lincoln County",
    "census_2025_geoid": "21137",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Livingston, KY",
    "epa_source_county_label": "Livingston County",
    "county_or_equivalent_display": "Livingston County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Livingston County",
    "census_2025_geoid": "21139",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Logan, KY",
    "epa_source_county_label": "Logan County",
    "county_or_equivalent_display": "Logan County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Logan County",
    "census_2025_geoid": "21141",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lyon, KY",
    "epa_source_county_label": "Lyon County",
    "county_or_equivalent_display": "Lyon County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lyon County",
    "census_2025_geoid": "21143",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Madison, KY",
    "epa_source_county_label": "Madison County",
    "county_or_equivalent_display": "Madison County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Madison County",
    "census_2025_geoid": "21151",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Magoffin, KY",
    "epa_source_county_label": "Magoffin County",
    "county_or_equivalent_display": "Magoffin County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Magoffin County",
    "census_2025_geoid": "21153",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marion, KY",
    "epa_source_county_label": "Marion County",
    "county_or_equivalent_display": "Marion County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marion County",
    "census_2025_geoid": "21155",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marshall, KY",
    "epa_source_county_label": "Marshall County",
    "county_or_equivalent_display": "Marshall County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marshall County",
    "census_2025_geoid": "21157",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Martin, KY",
    "epa_source_county_label": "Martin County",
    "county_or_equivalent_display": "Martin County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Martin County",
    "census_2025_geoid": "21159",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mason, KY",
    "epa_source_county_label": "Mason County",
    "county_or_equivalent_display": "Mason County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mason County",
    "census_2025_geoid": "21161",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "McCracken, KY",
    "epa_source_county_label": "McCracken County",
    "county_or_equivalent_display": "McCracken County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "McCracken County",
    "census_2025_geoid": "21145",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "McCreary, KY",
    "epa_source_county_label": "McCreary County",
    "county_or_equivalent_display": "McCreary County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "McCreary County",
    "census_2025_geoid": "21147",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "McLean, KY",
    "epa_source_county_label": "McLean County",
    "county_or_equivalent_display": "McLean County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "McLean County",
    "census_2025_geoid": "21149",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Meade, KY",
    "epa_source_county_label": "Meade County",
    "county_or_equivalent_display": "Meade County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Meade County",
    "census_2025_geoid": "21163",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Menifee, KY",
    "epa_source_county_label": "Menifee County",
    "county_or_equivalent_display": "Menifee County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Menifee County",
    "census_2025_geoid": "21165",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mercer, KY",
    "epa_source_county_label": "Mercer County",
    "county_or_equivalent_display": "Mercer County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mercer County",
    "census_2025_geoid": "21167",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Metcalfe, KY",
    "epa_source_county_label": "Metcalfe County",
    "county_or_equivalent_display": "Metcalfe County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Metcalfe County",
    "census_2025_geoid": "21169",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Monroe, KY",
    "epa_source_county_label": "Monroe County",
    "county_or_equivalent_display": "Monroe County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Monroe County",
    "census_2025_geoid": "21171",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Montgomery, KY",
    "epa_source_county_label": "Montgomery County",
    "county_or_equivalent_display": "Montgomery County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Montgomery County",
    "census_2025_geoid": "21173",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Morgan, KY",
    "epa_source_county_label": "Morgan County",
    "county_or_equivalent_display": "Morgan County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Morgan County",
    "census_2025_geoid": "21175",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Muhlenberg, KY",
    "epa_source_county_label": "Muhlenberg County",
    "county_or_equivalent_display": "Muhlenberg County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Muhlenberg County",
    "census_2025_geoid": "21177",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Nelson, KY",
    "epa_source_county_label": "Nelson County",
    "county_or_equivalent_display": "Nelson County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Nelson County",
    "census_2025_geoid": "21179",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Nicholas, KY",
    "epa_source_county_label": "Nicholas County",
    "county_or_equivalent_display": "Nicholas County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Nicholas County",
    "census_2025_geoid": "21181",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ohio, KY",
    "epa_source_county_label": "Ohio County",
    "county_or_equivalent_display": "Ohio County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ohio County",
    "census_2025_geoid": "21183",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Oldham, KY",
    "epa_source_county_label": "Oldham County",
    "county_or_equivalent_display": "Oldham County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Oldham County",
    "census_2025_geoid": "21185",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Owen, KY",
    "epa_source_county_label": "Owen County",
    "county_or_equivalent_display": "Owen County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Owen County",
    "census_2025_geoid": "21187",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Owsley, KY",
    "epa_source_county_label": "Owsley County",
    "county_or_equivalent_display": "Owsley County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Owsley County",
    "census_2025_geoid": "21189",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pendleton, KY",
    "epa_source_county_label": "Pendleton County",
    "county_or_equivalent_display": "Pendleton County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pendleton County",
    "census_2025_geoid": "21191",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Perry, KY",
    "epa_source_county_label": "Perry County",
    "county_or_equivalent_display": "Perry County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Perry County",
    "census_2025_geoid": "21193",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pike, KY",
    "epa_source_county_label": "Pike County",
    "county_or_equivalent_display": "Pike County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pike County",
    "census_2025_geoid": "21195",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Powell, KY",
    "epa_source_county_label": "Powell County",
    "county_or_equivalent_display": "Powell County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Powell County",
    "census_2025_geoid": "21197",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pulaski, KY",
    "epa_source_county_label": "Pulaski County",
    "county_or_equivalent_display": "Pulaski County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pulaski County",
    "census_2025_geoid": "21199",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Robertson, KY",
    "epa_source_county_label": "Robertson County",
    "county_or_equivalent_display": "Robertson County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Robertson County",
    "census_2025_geoid": "21201",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rockcastle, KY",
    "epa_source_county_label": "Rockcastle County",
    "county_or_equivalent_display": "Rockcastle County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rockcastle County",
    "census_2025_geoid": "21203",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rowan, KY",
    "epa_source_county_label": "Rowan County",
    "county_or_equivalent_display": "Rowan County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rowan County",
    "census_2025_geoid": "21205",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Russell, KY",
    "epa_source_county_label": "Russell County",
    "county_or_equivalent_display": "Russell County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Russell County",
    "census_2025_geoid": "21207",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Scott, KY",
    "epa_source_county_label": "Scott County",
    "county_or_equivalent_display": "Scott County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Scott County",
    "census_2025_geoid": "21209",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Shelby, KY",
    "epa_source_county_label": "Shelby County",
    "county_or_equivalent_display": "Shelby County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Shelby County",
    "census_2025_geoid": "21211",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Simpson, KY",
    "epa_source_county_label": "Simpson County",
    "county_or_equivalent_display": "Simpson County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Simpson County",
    "census_2025_geoid": "21213",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Spencer, KY",
    "epa_source_county_label": "Spencer County",
    "county_or_equivalent_display": "Spencer County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Spencer County",
    "census_2025_geoid": "21215",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Taylor, KY",
    "epa_source_county_label": "Taylor County",
    "county_or_equivalent_display": "Taylor County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Taylor County",
    "census_2025_geoid": "21217",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Todd, KY",
    "epa_source_county_label": "Todd County",
    "county_or_equivalent_display": "Todd County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Todd County",
    "census_2025_geoid": "21219",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Trigg, KY",
    "epa_source_county_label": "Trigg County",
    "county_or_equivalent_display": "Trigg County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Trigg County",
    "census_2025_geoid": "21221",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Trimble, KY",
    "epa_source_county_label": "Trimble County",
    "county_or_equivalent_display": "Trimble County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Trimble County",
    "census_2025_geoid": "21223",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Union, KY",
    "epa_source_county_label": "Union County",
    "county_or_equivalent_display": "Union County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Union County",
    "census_2025_geoid": "21225",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Warren, KY",
    "epa_source_county_label": "Warren County",
    "county_or_equivalent_display": "Warren County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Warren County",
    "census_2025_geoid": "21227",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washington, KY",
    "epa_source_county_label": "Washington County",
    "county_or_equivalent_display": "Washington County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washington County",
    "census_2025_geoid": "21229",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wayne, KY",
    "epa_source_county_label": "Wayne County",
    "county_or_equivalent_display": "Wayne County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wayne County",
    "census_2025_geoid": "21231",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Webster, KY",
    "epa_source_county_label": "Webster County",
    "county_or_equivalent_display": "Webster County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Webster County",
    "census_2025_geoid": "21233",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Whitley, KY",
    "epa_source_county_label": "Whitley County",
    "county_or_equivalent_display": "Whitley County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Whitley County",
    "census_2025_geoid": "21235",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wolfe, KY",
    "epa_source_county_label": "Wolfe County",
    "county_or_equivalent_display": "Wolfe County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wolfe County",
    "census_2025_geoid": "21237",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Woodford, KY",
    "epa_source_county_label": "Woodford County",
    "county_or_equivalent_display": "Woodford County",
    "state_name": "Kentucky",
    "state_abbreviation": "KY",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Woodford County",
    "census_2025_geoid": "21239",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Acadia, LA",
    "epa_source_county_label": "Acadia Parish",
    "county_or_equivalent_display": "Acadia Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Acadia Parish",
    "census_2025_geoid": "22001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Allen, LA",
    "epa_source_county_label": "Allen Parish",
    "county_or_equivalent_display": "Allen Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Allen Parish",
    "census_2025_geoid": "22003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ascension, LA",
    "epa_source_county_label": "Ascension Parish",
    "county_or_equivalent_display": "Ascension Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ascension Parish",
    "census_2025_geoid": "22005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Assumption, LA",
    "epa_source_county_label": "Assumption Parish",
    "county_or_equivalent_display": "Assumption Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Assumption Parish",
    "census_2025_geoid": "22007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Avoyelles, LA",
    "epa_source_county_label": "Avoyelles Parish",
    "county_or_equivalent_display": "Avoyelles Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Avoyelles Parish",
    "census_2025_geoid": "22009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Beauregard, LA",
    "epa_source_county_label": "Beauregard Parish",
    "county_or_equivalent_display": "Beauregard Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Beauregard Parish",
    "census_2025_geoid": "22011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bienville, LA",
    "epa_source_county_label": "Bienville Parish",
    "county_or_equivalent_display": "Bienville Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bienville Parish",
    "census_2025_geoid": "22013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bossier, LA",
    "epa_source_county_label": "Bossier Parish",
    "county_or_equivalent_display": "Bossier Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bossier Parish",
    "census_2025_geoid": "22015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Caddo, LA",
    "epa_source_county_label": "Caddo Parish",
    "county_or_equivalent_display": "Caddo Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Caddo Parish",
    "census_2025_geoid": "22017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Calcasieu, LA",
    "epa_source_county_label": "Calcasieu Parish",
    "county_or_equivalent_display": "Calcasieu Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Calcasieu Parish",
    "census_2025_geoid": "22019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Caldwell, LA",
    "epa_source_county_label": "Caldwell Parish",
    "county_or_equivalent_display": "Caldwell Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Caldwell Parish",
    "census_2025_geoid": "22021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cameron, LA",
    "epa_source_county_label": "Cameron Parish",
    "county_or_equivalent_display": "Cameron Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cameron Parish",
    "census_2025_geoid": "22023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Catahoula, LA",
    "epa_source_county_label": "Catahoula Parish",
    "county_or_equivalent_display": "Catahoula Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Catahoula Parish",
    "census_2025_geoid": "22025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Claiborne, LA",
    "epa_source_county_label": "Claiborne Parish",
    "county_or_equivalent_display": "Claiborne Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Claiborne Parish",
    "census_2025_geoid": "22027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Concordia, LA",
    "epa_source_county_label": "Concordia Parish",
    "county_or_equivalent_display": "Concordia Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Concordia Parish",
    "census_2025_geoid": "22029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "De Soto, LA",
    "epa_source_county_label": "De Soto Parish",
    "county_or_equivalent_display": "De Soto Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "De Soto Parish",
    "census_2025_geoid": "22031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "East Baton Rouge, LA",
    "epa_source_county_label": "East Baton Rouge Parish",
    "county_or_equivalent_display": "East Baton Rouge Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "East Baton Rouge Parish",
    "census_2025_geoid": "22033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "East Carroll, LA",
    "epa_source_county_label": "East Carroll Parish",
    "county_or_equivalent_display": "East Carroll Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "East Carroll Parish",
    "census_2025_geoid": "22035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "East Feliciana, LA",
    "epa_source_county_label": "East Feliciana Parish",
    "county_or_equivalent_display": "East Feliciana Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "East Feliciana Parish",
    "census_2025_geoid": "22037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Evangeline, LA",
    "epa_source_county_label": "Evangeline Parish",
    "county_or_equivalent_display": "Evangeline Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Evangeline Parish",
    "census_2025_geoid": "22039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Franklin, LA",
    "epa_source_county_label": "Franklin Parish",
    "county_or_equivalent_display": "Franklin Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Franklin Parish",
    "census_2025_geoid": "22041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grant, LA",
    "epa_source_county_label": "Grant Parish",
    "county_or_equivalent_display": "Grant Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grant Parish",
    "census_2025_geoid": "22043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Iberia, LA",
    "epa_source_county_label": "Iberia Parish",
    "county_or_equivalent_display": "Iberia Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Iberia Parish",
    "census_2025_geoid": "22045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Iberville, LA",
    "epa_source_county_label": "Iberville Parish",
    "county_or_equivalent_display": "Iberville Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Iberville Parish",
    "census_2025_geoid": "22047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jackson, LA",
    "epa_source_county_label": "Jackson Parish",
    "county_or_equivalent_display": "Jackson Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jackson Parish",
    "census_2025_geoid": "22049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jefferson Davis, LA",
    "epa_source_county_label": "Jefferson Davis Parish",
    "county_or_equivalent_display": "Jefferson Davis Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jefferson Davis Parish",
    "census_2025_geoid": "22053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jefferson, LA",
    "epa_source_county_label": "Jefferson Parish",
    "county_or_equivalent_display": "Jefferson Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jefferson Parish",
    "census_2025_geoid": "22051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "La Salle, LA",
    "epa_source_county_label": "La Salle Parish",
    "county_or_equivalent_display": "La Salle Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "LaSalle Parish",
    "census_2025_geoid": "22059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lafayette, LA",
    "epa_source_county_label": "Lafayette Parish",
    "county_or_equivalent_display": "Lafayette Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lafayette Parish",
    "census_2025_geoid": "22055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lafourche, LA",
    "epa_source_county_label": "Lafourche Parish",
    "county_or_equivalent_display": "Lafourche Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lafourche Parish",
    "census_2025_geoid": "22057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lincoln, LA",
    "epa_source_county_label": "Lincoln Parish",
    "county_or_equivalent_display": "Lincoln Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lincoln Parish",
    "census_2025_geoid": "22061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Livingston, LA",
    "epa_source_county_label": "Livingston Parish",
    "county_or_equivalent_display": "Livingston Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Livingston Parish",
    "census_2025_geoid": "22063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Madison, LA",
    "epa_source_county_label": "Madison Parish",
    "county_or_equivalent_display": "Madison Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Madison Parish",
    "census_2025_geoid": "22065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Morehouse, LA",
    "epa_source_county_label": "Morehouse Parish",
    "county_or_equivalent_display": "Morehouse Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Morehouse Parish",
    "census_2025_geoid": "22067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Natchitoches, LA",
    "epa_source_county_label": "Natchitoches Parish",
    "county_or_equivalent_display": "Natchitoches Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Natchitoches Parish",
    "census_2025_geoid": "22069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Orleans, LA",
    "epa_source_county_label": "Orleans Parish",
    "county_or_equivalent_display": "Orleans Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Orleans Parish",
    "census_2025_geoid": "22071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ouachita, LA",
    "epa_source_county_label": "Ouachita Parish",
    "county_or_equivalent_display": "Ouachita Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ouachita Parish",
    "census_2025_geoid": "22073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Plaquemines, LA",
    "epa_source_county_label": "Plaquemines Parish",
    "county_or_equivalent_display": "Plaquemines Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Plaquemines Parish",
    "census_2025_geoid": "22075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pointe Coupee, LA",
    "epa_source_county_label": "Pointe Coupee Parish",
    "county_or_equivalent_display": "Pointe Coupee Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pointe Coupee Parish",
    "census_2025_geoid": "22077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rapides, LA",
    "epa_source_county_label": "Rapides Parish",
    "county_or_equivalent_display": "Rapides Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rapides Parish",
    "census_2025_geoid": "22079",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Red River, LA",
    "epa_source_county_label": "Red River Parish",
    "county_or_equivalent_display": "Red River Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Red River Parish",
    "census_2025_geoid": "22081",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Richland, LA",
    "epa_source_county_label": "Richland Parish",
    "county_or_equivalent_display": "Richland Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Richland Parish",
    "census_2025_geoid": "22083",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sabine, LA",
    "epa_source_county_label": "Sabine Parish",
    "county_or_equivalent_display": "Sabine Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sabine Parish",
    "census_2025_geoid": "22085",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "St. Bernard, LA",
    "epa_source_county_label": "St. Bernard Parish",
    "county_or_equivalent_display": "St. Bernard Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "St. Bernard Parish",
    "census_2025_geoid": "22087",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "St. Charles, LA",
    "epa_source_county_label": "St. Charles Parish",
    "county_or_equivalent_display": "St. Charles Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "St. Charles Parish",
    "census_2025_geoid": "22089",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "St. Helena, LA",
    "epa_source_county_label": "St. Helena Parish",
    "county_or_equivalent_display": "St. Helena Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "St. Helena Parish",
    "census_2025_geoid": "22091",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "St. James, LA",
    "epa_source_county_label": "St. James Parish",
    "county_or_equivalent_display": "St. James Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "St. James Parish",
    "census_2025_geoid": "22093",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "St. John the Baptist, LA",
    "epa_source_county_label": "St. John the Baptist Parish",
    "county_or_equivalent_display": "St. John the Baptist Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "St. John the Baptist Parish",
    "census_2025_geoid": "22095",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "St. Landry, LA",
    "epa_source_county_label": "St. Landry Parish",
    "county_or_equivalent_display": "St. Landry Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "St. Landry Parish",
    "census_2025_geoid": "22097",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "St. Martin, LA",
    "epa_source_county_label": "St. Martin Parish",
    "county_or_equivalent_display": "St. Martin Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "St. Martin Parish",
    "census_2025_geoid": "22099",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "St. Mary, LA",
    "epa_source_county_label": "St. Mary Parish",
    "county_or_equivalent_display": "St. Mary Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "St. Mary Parish",
    "census_2025_geoid": "22101",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "St. Tammany, LA",
    "epa_source_county_label": "St. Tammany Parish",
    "county_or_equivalent_display": "St. Tammany Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "St. Tammany Parish",
    "census_2025_geoid": "22103",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tangipahoa, LA",
    "epa_source_county_label": "Tangipahoa Parish",
    "county_or_equivalent_display": "Tangipahoa Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tangipahoa Parish",
    "census_2025_geoid": "22105",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tensas, LA",
    "epa_source_county_label": "Tensas Parish",
    "county_or_equivalent_display": "Tensas Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tensas Parish",
    "census_2025_geoid": "22107",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Terrebonne, LA",
    "epa_source_county_label": "Terrebonne Parish",
    "county_or_equivalent_display": "Terrebonne Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Terrebonne Parish",
    "census_2025_geoid": "22109",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Union, LA",
    "epa_source_county_label": "Union Parish",
    "county_or_equivalent_display": "Union Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Union Parish",
    "census_2025_geoid": "22111",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Vermilion, LA",
    "epa_source_county_label": "Vermilion Parish",
    "county_or_equivalent_display": "Vermilion Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Vermilion Parish",
    "census_2025_geoid": "22113",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Vernon, LA",
    "epa_source_county_label": "Vernon Parish",
    "county_or_equivalent_display": "Vernon Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Vernon Parish",
    "census_2025_geoid": "22115",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washington, LA",
    "epa_source_county_label": "Washington Parish",
    "county_or_equivalent_display": "Washington Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washington Parish",
    "census_2025_geoid": "22117",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Webster, LA",
    "epa_source_county_label": "Webster Parish",
    "county_or_equivalent_display": "Webster Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Webster Parish",
    "census_2025_geoid": "22119",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "West Baton Rouge, LA",
    "epa_source_county_label": "West Baton Rouge Parish",
    "county_or_equivalent_display": "West Baton Rouge Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "West Baton Rouge Parish",
    "census_2025_geoid": "22121",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "West Carroll, LA",
    "epa_source_county_label": "West Carroll Parish",
    "county_or_equivalent_display": "West Carroll Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "West Carroll Parish",
    "census_2025_geoid": "22123",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "West Feliciana, LA",
    "epa_source_county_label": "West Feliciana Parish",
    "county_or_equivalent_display": "West Feliciana Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "West Feliciana Parish",
    "census_2025_geoid": "22125",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Winn, LA",
    "epa_source_county_label": "Winn Parish",
    "county_or_equivalent_display": "Winn Parish",
    "state_name": "Louisiana",
    "state_abbreviation": "LA",
    "geography_type": "parish",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Winn Parish",
    "census_2025_geoid": "22127",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Androscoggin, ME",
    "epa_source_county_label": "Androscoggin County",
    "county_or_equivalent_display": "Androscoggin County",
    "state_name": "Maine",
    "state_abbreviation": "ME",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Androscoggin County",
    "census_2025_geoid": "23001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Aroostook, ME",
    "epa_source_county_label": "Aroostook County",
    "county_or_equivalent_display": "Aroostook County",
    "state_name": "Maine",
    "state_abbreviation": "ME",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Aroostook County",
    "census_2025_geoid": "23003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cumberland, ME",
    "epa_source_county_label": "Cumberland County",
    "county_or_equivalent_display": "Cumberland County",
    "state_name": "Maine",
    "state_abbreviation": "ME",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cumberland County",
    "census_2025_geoid": "23005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Franklin, ME",
    "epa_source_county_label": "Franklin County",
    "county_or_equivalent_display": "Franklin County",
    "state_name": "Maine",
    "state_abbreviation": "ME",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Franklin County",
    "census_2025_geoid": "23007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hancock, ME",
    "epa_source_county_label": "Hancock County",
    "county_or_equivalent_display": "Hancock County",
    "state_name": "Maine",
    "state_abbreviation": "ME",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hancock County",
    "census_2025_geoid": "23009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kennebec, ME",
    "epa_source_county_label": "Kennebec County",
    "county_or_equivalent_display": "Kennebec County",
    "state_name": "Maine",
    "state_abbreviation": "ME",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kennebec County",
    "census_2025_geoid": "23011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Knox, ME",
    "epa_source_county_label": "Knox County",
    "county_or_equivalent_display": "Knox County",
    "state_name": "Maine",
    "state_abbreviation": "ME",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Knox County",
    "census_2025_geoid": "23013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lincoln, ME",
    "epa_source_county_label": "Lincoln County",
    "county_or_equivalent_display": "Lincoln County",
    "state_name": "Maine",
    "state_abbreviation": "ME",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lincoln County",
    "census_2025_geoid": "23015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Oxford, ME",
    "epa_source_county_label": "Oxford County",
    "county_or_equivalent_display": "Oxford County",
    "state_name": "Maine",
    "state_abbreviation": "ME",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Oxford County",
    "census_2025_geoid": "23017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Penobscot, ME",
    "epa_source_county_label": "Penobscot County",
    "county_or_equivalent_display": "Penobscot County",
    "state_name": "Maine",
    "state_abbreviation": "ME",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Penobscot County",
    "census_2025_geoid": "23019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Piscataquis, ME",
    "epa_source_county_label": "Piscataquis County",
    "county_or_equivalent_display": "Piscataquis County",
    "state_name": "Maine",
    "state_abbreviation": "ME",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Piscataquis County",
    "census_2025_geoid": "23021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sagadahoc, ME",
    "epa_source_county_label": "Sagadahoc County",
    "county_or_equivalent_display": "Sagadahoc County",
    "state_name": "Maine",
    "state_abbreviation": "ME",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sagadahoc County",
    "census_2025_geoid": "23023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Somerset, ME",
    "epa_source_county_label": "Somerset County",
    "county_or_equivalent_display": "Somerset County",
    "state_name": "Maine",
    "state_abbreviation": "ME",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Somerset County",
    "census_2025_geoid": "23025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Waldo, ME",
    "epa_source_county_label": "Waldo County",
    "county_or_equivalent_display": "Waldo County",
    "state_name": "Maine",
    "state_abbreviation": "ME",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Waldo County",
    "census_2025_geoid": "23027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washington, ME",
    "epa_source_county_label": "Washington County",
    "county_or_equivalent_display": "Washington County",
    "state_name": "Maine",
    "state_abbreviation": "ME",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washington County",
    "census_2025_geoid": "23029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "York, ME",
    "epa_source_county_label": "York County",
    "county_or_equivalent_display": "York County",
    "state_name": "Maine",
    "state_abbreviation": "ME",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "York County",
    "census_2025_geoid": "23031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Allegany, MD",
    "epa_source_county_label": "Allegany County",
    "county_or_equivalent_display": "Allegany County",
    "state_name": "Maryland",
    "state_abbreviation": "MD",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Allegany County",
    "census_2025_geoid": "24001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Anne Arundel, MD",
    "epa_source_county_label": "Anne Arundel County",
    "county_or_equivalent_display": "Anne Arundel County",
    "state_name": "Maryland",
    "state_abbreviation": "MD",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Anne Arundel County",
    "census_2025_geoid": "24003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Baltimore, MD",
    "epa_source_county_label": "Baltimore County",
    "county_or_equivalent_display": "Baltimore County",
    "state_name": "Maryland",
    "state_abbreviation": "MD",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Baltimore County",
    "census_2025_geoid": "24005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Baltimore city, MD",
    "epa_source_county_label": "Baltimore city",
    "county_or_equivalent_display": "Baltimore city",
    "state_name": "Maryland",
    "state_abbreviation": "MD",
    "geography_type": "independent city",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Baltimore city",
    "census_2025_geoid": "24510",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Calvert, MD",
    "epa_source_county_label": "Calvert County",
    "county_or_equivalent_display": "Calvert County",
    "state_name": "Maryland",
    "state_abbreviation": "MD",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Calvert County",
    "census_2025_geoid": "24009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Caroline, MD",
    "epa_source_county_label": "Caroline County",
    "county_or_equivalent_display": "Caroline County",
    "state_name": "Maryland",
    "state_abbreviation": "MD",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Caroline County",
    "census_2025_geoid": "24011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Carroll, MD",
    "epa_source_county_label": "Carroll County",
    "county_or_equivalent_display": "Carroll County",
    "state_name": "Maryland",
    "state_abbreviation": "MD",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Carroll County",
    "census_2025_geoid": "24013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cecil, MD",
    "epa_source_county_label": "Cecil County",
    "county_or_equivalent_display": "Cecil County",
    "state_name": "Maryland",
    "state_abbreviation": "MD",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cecil County",
    "census_2025_geoid": "24015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Charles, MD",
    "epa_source_county_label": "Charles County",
    "county_or_equivalent_display": "Charles County",
    "state_name": "Maryland",
    "state_abbreviation": "MD",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Charles County",
    "census_2025_geoid": "24017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dorchester, MD",
    "epa_source_county_label": "Dorchester County",
    "county_or_equivalent_display": "Dorchester County",
    "state_name": "Maryland",
    "state_abbreviation": "MD",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dorchester County",
    "census_2025_geoid": "24019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Frederick, MD",
    "epa_source_county_label": "Frederick County",
    "county_or_equivalent_display": "Frederick County",
    "state_name": "Maryland",
    "state_abbreviation": "MD",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Frederick County",
    "census_2025_geoid": "24021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Garrett, MD",
    "epa_source_county_label": "Garrett County",
    "county_or_equivalent_display": "Garrett County",
    "state_name": "Maryland",
    "state_abbreviation": "MD",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Garrett County",
    "census_2025_geoid": "24023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Harford, MD",
    "epa_source_county_label": "Harford County",
    "county_or_equivalent_display": "Harford County",
    "state_name": "Maryland",
    "state_abbreviation": "MD",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Harford County",
    "census_2025_geoid": "24025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Howard, MD",
    "epa_source_county_label": "Howard County",
    "county_or_equivalent_display": "Howard County",
    "state_name": "Maryland",
    "state_abbreviation": "MD",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Howard County",
    "census_2025_geoid": "24027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kent, MD",
    "epa_source_county_label": "Kent County",
    "county_or_equivalent_display": "Kent County",
    "state_name": "Maryland",
    "state_abbreviation": "MD",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kent County",
    "census_2025_geoid": "24029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Montgomery, MD",
    "epa_source_county_label": "Montgomery County",
    "county_or_equivalent_display": "Montgomery County",
    "state_name": "Maryland",
    "state_abbreviation": "MD",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Montgomery County",
    "census_2025_geoid": "24031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Prince George's, MD",
    "epa_source_county_label": "Prince George's County",
    "county_or_equivalent_display": "Prince George's County",
    "state_name": "Maryland",
    "state_abbreviation": "MD",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Prince George's County",
    "census_2025_geoid": "24033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Queen Anne's, MD",
    "epa_source_county_label": "Queen Anne's County",
    "county_or_equivalent_display": "Queen Anne's County",
    "state_name": "Maryland",
    "state_abbreviation": "MD",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Queen Anne's County",
    "census_2025_geoid": "24035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Somerset, MD",
    "epa_source_county_label": "Somerset County",
    "county_or_equivalent_display": "Somerset County",
    "state_name": "Maryland",
    "state_abbreviation": "MD",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Somerset County",
    "census_2025_geoid": "24039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "St. Mary's, MD",
    "epa_source_county_label": "St. Mary's County",
    "county_or_equivalent_display": "St. Mary's County",
    "state_name": "Maryland",
    "state_abbreviation": "MD",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "St. Mary's County",
    "census_2025_geoid": "24037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Talbot, MD",
    "epa_source_county_label": "Talbot County",
    "county_or_equivalent_display": "Talbot County",
    "state_name": "Maryland",
    "state_abbreviation": "MD",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Talbot County",
    "census_2025_geoid": "24041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washington, MD",
    "epa_source_county_label": "Washington County",
    "county_or_equivalent_display": "Washington County",
    "state_name": "Maryland",
    "state_abbreviation": "MD",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washington County",
    "census_2025_geoid": "24043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wicomico, MD",
    "epa_source_county_label": "Wicomico County",
    "county_or_equivalent_display": "Wicomico County",
    "state_name": "Maryland",
    "state_abbreviation": "MD",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wicomico County",
    "census_2025_geoid": "24045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Worcester, MD",
    "epa_source_county_label": "Worcester County",
    "county_or_equivalent_display": "Worcester County",
    "state_name": "Maryland",
    "state_abbreviation": "MD",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Worcester County",
    "census_2025_geoid": "24047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Barnstable, MA",
    "epa_source_county_label": "Barnstable County",
    "county_or_equivalent_display": "Barnstable County",
    "state_name": "Massachusetts",
    "state_abbreviation": "MA",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Barnstable County",
    "census_2025_geoid": "25001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Berkshire, MA",
    "epa_source_county_label": "Berkshire County",
    "county_or_equivalent_display": "Berkshire County",
    "state_name": "Massachusetts",
    "state_abbreviation": "MA",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Berkshire County",
    "census_2025_geoid": "25003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bristol, MA",
    "epa_source_county_label": "Bristol County",
    "county_or_equivalent_display": "Bristol County",
    "state_name": "Massachusetts",
    "state_abbreviation": "MA",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bristol County",
    "census_2025_geoid": "25005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dukes, MA",
    "epa_source_county_label": "Dukes County",
    "county_or_equivalent_display": "Dukes County",
    "state_name": "Massachusetts",
    "state_abbreviation": "MA",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dukes County",
    "census_2025_geoid": "25007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Essex, MA",
    "epa_source_county_label": "Essex County",
    "county_or_equivalent_display": "Essex County",
    "state_name": "Massachusetts",
    "state_abbreviation": "MA",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Essex County",
    "census_2025_geoid": "25009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Franklin, MA",
    "epa_source_county_label": "Franklin County",
    "county_or_equivalent_display": "Franklin County",
    "state_name": "Massachusetts",
    "state_abbreviation": "MA",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Franklin County",
    "census_2025_geoid": "25011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hampden, MA",
    "epa_source_county_label": "Hampden County",
    "county_or_equivalent_display": "Hampden County",
    "state_name": "Massachusetts",
    "state_abbreviation": "MA",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hampden County",
    "census_2025_geoid": "25013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hampshire, MA",
    "epa_source_county_label": "Hampshire County",
    "county_or_equivalent_display": "Hampshire County",
    "state_name": "Massachusetts",
    "state_abbreviation": "MA",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hampshire County",
    "census_2025_geoid": "25015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Middlesex, MA",
    "epa_source_county_label": "Middlesex County",
    "county_or_equivalent_display": "Middlesex County",
    "state_name": "Massachusetts",
    "state_abbreviation": "MA",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Middlesex County",
    "census_2025_geoid": "25017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Nantucket, MA",
    "epa_source_county_label": "Nantucket County",
    "county_or_equivalent_display": "Nantucket County",
    "state_name": "Massachusetts",
    "state_abbreviation": "MA",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Nantucket County",
    "census_2025_geoid": "25019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Norfolk, MA",
    "epa_source_county_label": "Norfolk County",
    "county_or_equivalent_display": "Norfolk County",
    "state_name": "Massachusetts",
    "state_abbreviation": "MA",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Norfolk County",
    "census_2025_geoid": "25021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Plymouth, MA",
    "epa_source_county_label": "Plymouth County",
    "county_or_equivalent_display": "Plymouth County",
    "state_name": "Massachusetts",
    "state_abbreviation": "MA",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Plymouth County",
    "census_2025_geoid": "25023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Suffolk, MA",
    "epa_source_county_label": "Suffolk County",
    "county_or_equivalent_display": "Suffolk County",
    "state_name": "Massachusetts",
    "state_abbreviation": "MA",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Suffolk County",
    "census_2025_geoid": "25025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Worcester, MA",
    "epa_source_county_label": "Worcester County",
    "county_or_equivalent_display": "Worcester County",
    "state_name": "Massachusetts",
    "state_abbreviation": "MA",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Worcester County",
    "census_2025_geoid": "25027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Alcona, MI",
    "epa_source_county_label": "Alcona County",
    "county_or_equivalent_display": "Alcona County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Alcona County",
    "census_2025_geoid": "26001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Alger, MI",
    "epa_source_county_label": "Alger County",
    "county_or_equivalent_display": "Alger County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Alger County",
    "census_2025_geoid": "26003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Allegan, MI",
    "epa_source_county_label": "Allegan County",
    "county_or_equivalent_display": "Allegan County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Allegan County",
    "census_2025_geoid": "26005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Alpena, MI",
    "epa_source_county_label": "Alpena County",
    "county_or_equivalent_display": "Alpena County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Alpena County",
    "census_2025_geoid": "26007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Antrim, MI",
    "epa_source_county_label": "Antrim County",
    "county_or_equivalent_display": "Antrim County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Antrim County",
    "census_2025_geoid": "26009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Arenac, MI",
    "epa_source_county_label": "Arenac County",
    "county_or_equivalent_display": "Arenac County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Arenac County",
    "census_2025_geoid": "26011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Baraga, MI",
    "epa_source_county_label": "Baraga County",
    "county_or_equivalent_display": "Baraga County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Baraga County",
    "census_2025_geoid": "26013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Barry, MI",
    "epa_source_county_label": "Barry County",
    "county_or_equivalent_display": "Barry County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Barry County",
    "census_2025_geoid": "26015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bay, MI",
    "epa_source_county_label": "Bay County",
    "county_or_equivalent_display": "Bay County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bay County",
    "census_2025_geoid": "26017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Benzie, MI",
    "epa_source_county_label": "Benzie County",
    "county_or_equivalent_display": "Benzie County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Benzie County",
    "census_2025_geoid": "26019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Berrien, MI",
    "epa_source_county_label": "Berrien County",
    "county_or_equivalent_display": "Berrien County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Berrien County",
    "census_2025_geoid": "26021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Branch, MI",
    "epa_source_county_label": "Branch County",
    "county_or_equivalent_display": "Branch County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Branch County",
    "census_2025_geoid": "26023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Calhoun, MI",
    "epa_source_county_label": "Calhoun County",
    "county_or_equivalent_display": "Calhoun County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Calhoun County",
    "census_2025_geoid": "26025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cass, MI",
    "epa_source_county_label": "Cass County",
    "county_or_equivalent_display": "Cass County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cass County",
    "census_2025_geoid": "26027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Charlevoix, MI",
    "epa_source_county_label": "Charlevoix County",
    "county_or_equivalent_display": "Charlevoix County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Charlevoix County",
    "census_2025_geoid": "26029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cheboygan, MI",
    "epa_source_county_label": "Cheboygan County",
    "county_or_equivalent_display": "Cheboygan County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cheboygan County",
    "census_2025_geoid": "26031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chippewa, MI",
    "epa_source_county_label": "Chippewa County",
    "county_or_equivalent_display": "Chippewa County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chippewa County",
    "census_2025_geoid": "26033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clare, MI",
    "epa_source_county_label": "Clare County",
    "county_or_equivalent_display": "Clare County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clare County",
    "census_2025_geoid": "26035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clinton, MI",
    "epa_source_county_label": "Clinton County",
    "county_or_equivalent_display": "Clinton County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clinton County",
    "census_2025_geoid": "26037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Crawford, MI",
    "epa_source_county_label": "Crawford County",
    "county_or_equivalent_display": "Crawford County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Crawford County",
    "census_2025_geoid": "26039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Delta, MI",
    "epa_source_county_label": "Delta County",
    "county_or_equivalent_display": "Delta County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Delta County",
    "census_2025_geoid": "26041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dickinson, MI",
    "epa_source_county_label": "Dickinson County",
    "county_or_equivalent_display": "Dickinson County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dickinson County",
    "census_2025_geoid": "26043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Eaton, MI",
    "epa_source_county_label": "Eaton County",
    "county_or_equivalent_display": "Eaton County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Eaton County",
    "census_2025_geoid": "26045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Emmet, MI",
    "epa_source_county_label": "Emmet County",
    "county_or_equivalent_display": "Emmet County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Emmet County",
    "census_2025_geoid": "26047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Genesee, MI",
    "epa_source_county_label": "Genesee County",
    "county_or_equivalent_display": "Genesee County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Genesee County",
    "census_2025_geoid": "26049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gladwin, MI",
    "epa_source_county_label": "Gladwin County",
    "county_or_equivalent_display": "Gladwin County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gladwin County",
    "census_2025_geoid": "26051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gogebic, MI",
    "epa_source_county_label": "Gogebic County",
    "county_or_equivalent_display": "Gogebic County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gogebic County",
    "census_2025_geoid": "26053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grand Traverse, MI",
    "epa_source_county_label": "Grand Traverse County",
    "county_or_equivalent_display": "Grand Traverse County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grand Traverse County",
    "census_2025_geoid": "26055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gratiot, MI",
    "epa_source_county_label": "Gratiot County",
    "county_or_equivalent_display": "Gratiot County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gratiot County",
    "census_2025_geoid": "26057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hillsdale, MI",
    "epa_source_county_label": "Hillsdale County",
    "county_or_equivalent_display": "Hillsdale County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hillsdale County",
    "census_2025_geoid": "26059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Houghton, MI",
    "epa_source_county_label": "Houghton County",
    "county_or_equivalent_display": "Houghton County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Houghton County",
    "census_2025_geoid": "26061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Huron, MI",
    "epa_source_county_label": "Huron County",
    "county_or_equivalent_display": "Huron County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Huron County",
    "census_2025_geoid": "26063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ingham, MI",
    "epa_source_county_label": "Ingham County",
    "county_or_equivalent_display": "Ingham County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ingham County",
    "census_2025_geoid": "26065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ionia, MI",
    "epa_source_county_label": "Ionia County",
    "county_or_equivalent_display": "Ionia County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ionia County",
    "census_2025_geoid": "26067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Iosco, MI",
    "epa_source_county_label": "Iosco County",
    "county_or_equivalent_display": "Iosco County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Iosco County",
    "census_2025_geoid": "26069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Iron, MI",
    "epa_source_county_label": "Iron County",
    "county_or_equivalent_display": "Iron County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Iron County",
    "census_2025_geoid": "26071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Isabella, MI",
    "epa_source_county_label": "Isabella County",
    "county_or_equivalent_display": "Isabella County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Isabella County",
    "census_2025_geoid": "26073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jackson, MI",
    "epa_source_county_label": "Jackson County",
    "county_or_equivalent_display": "Jackson County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jackson County",
    "census_2025_geoid": "26075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kalamazoo, MI",
    "epa_source_county_label": "Kalamazoo County",
    "county_or_equivalent_display": "Kalamazoo County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kalamazoo County",
    "census_2025_geoid": "26077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kalkaska, MI",
    "epa_source_county_label": "Kalkaska County",
    "county_or_equivalent_display": "Kalkaska County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kalkaska County",
    "census_2025_geoid": "26079",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kent, MI",
    "epa_source_county_label": "Kent County",
    "county_or_equivalent_display": "Kent County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kent County",
    "census_2025_geoid": "26081",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Keweenaw, MI",
    "epa_source_county_label": "Keweenaw County",
    "county_or_equivalent_display": "Keweenaw County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Keweenaw County",
    "census_2025_geoid": "26083",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lake, MI",
    "epa_source_county_label": "Lake County",
    "county_or_equivalent_display": "Lake County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lake County",
    "census_2025_geoid": "26085",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lapeer, MI",
    "epa_source_county_label": "Lapeer County",
    "county_or_equivalent_display": "Lapeer County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lapeer County",
    "census_2025_geoid": "26087",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Leelanau, MI",
    "epa_source_county_label": "Leelanau County",
    "county_or_equivalent_display": "Leelanau County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Leelanau County",
    "census_2025_geoid": "26089",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lenawee, MI",
    "epa_source_county_label": "Lenawee County",
    "county_or_equivalent_display": "Lenawee County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lenawee County",
    "census_2025_geoid": "26091",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Livingston, MI",
    "epa_source_county_label": "Livingston County",
    "county_or_equivalent_display": "Livingston County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Livingston County",
    "census_2025_geoid": "26093",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Luce, MI",
    "epa_source_county_label": "Luce County",
    "county_or_equivalent_display": "Luce County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Luce County",
    "census_2025_geoid": "26095",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mackinac, MI",
    "epa_source_county_label": "Mackinac County",
    "county_or_equivalent_display": "Mackinac County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mackinac County",
    "census_2025_geoid": "26097",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Macomb, MI",
    "epa_source_county_label": "Macomb County",
    "county_or_equivalent_display": "Macomb County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Macomb County",
    "census_2025_geoid": "26099",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Manistee, MI",
    "epa_source_county_label": "Manistee County",
    "county_or_equivalent_display": "Manistee County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Manistee County",
    "census_2025_geoid": "26101",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marquette, MI",
    "epa_source_county_label": "Marquette County",
    "county_or_equivalent_display": "Marquette County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marquette County",
    "census_2025_geoid": "26103",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mason, MI",
    "epa_source_county_label": "Mason County",
    "county_or_equivalent_display": "Mason County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mason County",
    "census_2025_geoid": "26105",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mecosta, MI",
    "epa_source_county_label": "Mecosta County",
    "county_or_equivalent_display": "Mecosta County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mecosta County",
    "census_2025_geoid": "26107",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Menominee, MI",
    "epa_source_county_label": "Menominee County",
    "county_or_equivalent_display": "Menominee County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Menominee County",
    "census_2025_geoid": "26109",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Midland, MI",
    "epa_source_county_label": "Midland County",
    "county_or_equivalent_display": "Midland County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Midland County",
    "census_2025_geoid": "26111",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Missaukee, MI",
    "epa_source_county_label": "Missaukee County",
    "county_or_equivalent_display": "Missaukee County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Missaukee County",
    "census_2025_geoid": "26113",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Monroe, MI",
    "epa_source_county_label": "Monroe County",
    "county_or_equivalent_display": "Monroe County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Monroe County",
    "census_2025_geoid": "26115",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Montcalm, MI",
    "epa_source_county_label": "Montcalm County",
    "county_or_equivalent_display": "Montcalm County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Montcalm County",
    "census_2025_geoid": "26117",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Montmorency, MI",
    "epa_source_county_label": "Montmorency County",
    "county_or_equivalent_display": "Montmorency County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Montmorency County",
    "census_2025_geoid": "26119",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Muskegon, MI",
    "epa_source_county_label": "Muskegon County",
    "county_or_equivalent_display": "Muskegon County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Muskegon County",
    "census_2025_geoid": "26121",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Newaygo, MI",
    "epa_source_county_label": "Newaygo County",
    "county_or_equivalent_display": "Newaygo County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Newaygo County",
    "census_2025_geoid": "26123",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Oakland, MI",
    "epa_source_county_label": "Oakland County",
    "county_or_equivalent_display": "Oakland County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Oakland County",
    "census_2025_geoid": "26125",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Oceana, MI",
    "epa_source_county_label": "Oceana County",
    "county_or_equivalent_display": "Oceana County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Oceana County",
    "census_2025_geoid": "26127",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ogemaw, MI",
    "epa_source_county_label": "Ogemaw County",
    "county_or_equivalent_display": "Ogemaw County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ogemaw County",
    "census_2025_geoid": "26129",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ontonagon, MI",
    "epa_source_county_label": "Ontonagon County",
    "county_or_equivalent_display": "Ontonagon County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ontonagon County",
    "census_2025_geoid": "26131",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Osceola, MI",
    "epa_source_county_label": "Osceola County",
    "county_or_equivalent_display": "Osceola County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Osceola County",
    "census_2025_geoid": "26133",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Oscoda, MI",
    "epa_source_county_label": "Oscoda County",
    "county_or_equivalent_display": "Oscoda County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Oscoda County",
    "census_2025_geoid": "26135",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Otsego, MI",
    "epa_source_county_label": "Otsego County",
    "county_or_equivalent_display": "Otsego County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Otsego County",
    "census_2025_geoid": "26137",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ottawa, MI",
    "epa_source_county_label": "Ottawa County",
    "county_or_equivalent_display": "Ottawa County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ottawa County",
    "census_2025_geoid": "26139",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Presque Isle, MI",
    "epa_source_county_label": "Presque Isle County",
    "county_or_equivalent_display": "Presque Isle County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Presque Isle County",
    "census_2025_geoid": "26141",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Roscommon, MI",
    "epa_source_county_label": "Roscommon County",
    "county_or_equivalent_display": "Roscommon County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Roscommon County",
    "census_2025_geoid": "26143",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Saginaw, MI",
    "epa_source_county_label": "Saginaw County",
    "county_or_equivalent_display": "Saginaw County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Saginaw County",
    "census_2025_geoid": "26145",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sanilac, MI",
    "epa_source_county_label": "Sanilac County",
    "county_or_equivalent_display": "Sanilac County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sanilac County",
    "census_2025_geoid": "26151",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Schoolcraft, MI",
    "epa_source_county_label": "Schoolcraft County",
    "county_or_equivalent_display": "Schoolcraft County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Schoolcraft County",
    "census_2025_geoid": "26153",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Shiawassee, MI",
    "epa_source_county_label": "Shiawassee County",
    "county_or_equivalent_display": "Shiawassee County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Shiawassee County",
    "census_2025_geoid": "26155",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "St. Clair, MI",
    "epa_source_county_label": "St. Clair County",
    "county_or_equivalent_display": "St. Clair County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "St. Clair County",
    "census_2025_geoid": "26147",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "St. Joseph, MI",
    "epa_source_county_label": "St. Joseph County",
    "county_or_equivalent_display": "St. Joseph County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "St. Joseph County",
    "census_2025_geoid": "26149",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tuscola, MI",
    "epa_source_county_label": "Tuscola County",
    "county_or_equivalent_display": "Tuscola County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tuscola County",
    "census_2025_geoid": "26157",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Van Buren, MI",
    "epa_source_county_label": "Van Buren County",
    "county_or_equivalent_display": "Van Buren County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Van Buren County",
    "census_2025_geoid": "26159",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washtenaw, MI",
    "epa_source_county_label": "Washtenaw County",
    "county_or_equivalent_display": "Washtenaw County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washtenaw County",
    "census_2025_geoid": "26161",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wayne, MI",
    "epa_source_county_label": "Wayne County",
    "county_or_equivalent_display": "Wayne County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wayne County",
    "census_2025_geoid": "26163",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wexford, MI",
    "epa_source_county_label": "Wexford County",
    "county_or_equivalent_display": "Wexford County",
    "state_name": "Michigan",
    "state_abbreviation": "MI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wexford County",
    "census_2025_geoid": "26165",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Aitkin, MN",
    "epa_source_county_label": "Aitkin County",
    "county_or_equivalent_display": "Aitkin County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Aitkin County",
    "census_2025_geoid": "27001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Anoka, MN",
    "epa_source_county_label": "Anoka County",
    "county_or_equivalent_display": "Anoka County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Anoka County",
    "census_2025_geoid": "27003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Becker, MN",
    "epa_source_county_label": "Becker County",
    "county_or_equivalent_display": "Becker County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Becker County",
    "census_2025_geoid": "27005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Beltrami, MN",
    "epa_source_county_label": "Beltrami County",
    "county_or_equivalent_display": "Beltrami County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Beltrami County",
    "census_2025_geoid": "27007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Benton, MN",
    "epa_source_county_label": "Benton County",
    "county_or_equivalent_display": "Benton County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Benton County",
    "census_2025_geoid": "27009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Big Stone, MN",
    "epa_source_county_label": "Big Stone County",
    "county_or_equivalent_display": "Big Stone County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Big Stone County",
    "census_2025_geoid": "27011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Blue Earth, MN",
    "epa_source_county_label": "Blue Earth County",
    "county_or_equivalent_display": "Blue Earth County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Blue Earth County",
    "census_2025_geoid": "27013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Brown, MN",
    "epa_source_county_label": "Brown County",
    "county_or_equivalent_display": "Brown County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Brown County",
    "census_2025_geoid": "27015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Carlton, MN",
    "epa_source_county_label": "Carlton County",
    "county_or_equivalent_display": "Carlton County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Carlton County",
    "census_2025_geoid": "27017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Carver, MN",
    "epa_source_county_label": "Carver County",
    "county_or_equivalent_display": "Carver County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Carver County",
    "census_2025_geoid": "27019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cass, MN",
    "epa_source_county_label": "Cass County",
    "county_or_equivalent_display": "Cass County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cass County",
    "census_2025_geoid": "27021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chippewa, MN",
    "epa_source_county_label": "Chippewa County",
    "county_or_equivalent_display": "Chippewa County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chippewa County",
    "census_2025_geoid": "27023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chisago, MN",
    "epa_source_county_label": "Chisago County",
    "county_or_equivalent_display": "Chisago County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chisago County",
    "census_2025_geoid": "27025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clay, MN",
    "epa_source_county_label": "Clay County",
    "county_or_equivalent_display": "Clay County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clay County",
    "census_2025_geoid": "27027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clearwater, MN",
    "epa_source_county_label": "Clearwater County",
    "county_or_equivalent_display": "Clearwater County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clearwater County",
    "census_2025_geoid": "27029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cook, MN",
    "epa_source_county_label": "Cook County",
    "county_or_equivalent_display": "Cook County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cook County",
    "census_2025_geoid": "27031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cottonwood, MN",
    "epa_source_county_label": "Cottonwood County",
    "county_or_equivalent_display": "Cottonwood County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cottonwood County",
    "census_2025_geoid": "27033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Crow Wing, MN",
    "epa_source_county_label": "Crow Wing County",
    "county_or_equivalent_display": "Crow Wing County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Crow Wing County",
    "census_2025_geoid": "27035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dakota, MN",
    "epa_source_county_label": "Dakota County",
    "county_or_equivalent_display": "Dakota County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dakota County",
    "census_2025_geoid": "27037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dodge, MN",
    "epa_source_county_label": "Dodge County",
    "county_or_equivalent_display": "Dodge County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dodge County",
    "census_2025_geoid": "27039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Douglas, MN",
    "epa_source_county_label": "Douglas County",
    "county_or_equivalent_display": "Douglas County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Douglas County",
    "census_2025_geoid": "27041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Faribault, MN",
    "epa_source_county_label": "Faribault County",
    "county_or_equivalent_display": "Faribault County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Faribault County",
    "census_2025_geoid": "27043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fillmore, MN",
    "epa_source_county_label": "Fillmore County",
    "county_or_equivalent_display": "Fillmore County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fillmore County",
    "census_2025_geoid": "27045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Freeborn, MN",
    "epa_source_county_label": "Freeborn County",
    "county_or_equivalent_display": "Freeborn County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Freeborn County",
    "census_2025_geoid": "27047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Goodhue, MN",
    "epa_source_county_label": "Goodhue County",
    "county_or_equivalent_display": "Goodhue County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Goodhue County",
    "census_2025_geoid": "27049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grant, MN",
    "epa_source_county_label": "Grant County",
    "county_or_equivalent_display": "Grant County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grant County",
    "census_2025_geoid": "27051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hennepin, MN",
    "epa_source_county_label": "Hennepin County",
    "county_or_equivalent_display": "Hennepin County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hennepin County",
    "census_2025_geoid": "27053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Houston, MN",
    "epa_source_county_label": "Houston County",
    "county_or_equivalent_display": "Houston County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Houston County",
    "census_2025_geoid": "27055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hubbard, MN",
    "epa_source_county_label": "Hubbard County",
    "county_or_equivalent_display": "Hubbard County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hubbard County",
    "census_2025_geoid": "27057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Isanti, MN",
    "epa_source_county_label": "Isanti County",
    "county_or_equivalent_display": "Isanti County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Isanti County",
    "census_2025_geoid": "27059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Itasca, MN",
    "epa_source_county_label": "Itasca County",
    "county_or_equivalent_display": "Itasca County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Itasca County",
    "census_2025_geoid": "27061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jackson, MN",
    "epa_source_county_label": "Jackson County",
    "county_or_equivalent_display": "Jackson County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jackson County",
    "census_2025_geoid": "27063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kanabec, MN",
    "epa_source_county_label": "Kanabec County",
    "county_or_equivalent_display": "Kanabec County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kanabec County",
    "census_2025_geoid": "27065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kandiyohi, MN",
    "epa_source_county_label": "Kandiyohi County",
    "county_or_equivalent_display": "Kandiyohi County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kandiyohi County",
    "census_2025_geoid": "27067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kittson, MN",
    "epa_source_county_label": "Kittson County",
    "county_or_equivalent_display": "Kittson County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kittson County",
    "census_2025_geoid": "27069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Koochiching, MN",
    "epa_source_county_label": "Koochiching County",
    "county_or_equivalent_display": "Koochiching County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Koochiching County",
    "census_2025_geoid": "27071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lac qui Parle, MN",
    "epa_source_county_label": "Lac qui Parle County",
    "county_or_equivalent_display": "Lac qui Parle County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lac qui Parle County",
    "census_2025_geoid": "27073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lake, MN",
    "epa_source_county_label": "Lake County",
    "county_or_equivalent_display": "Lake County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lake County",
    "census_2025_geoid": "27075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lake of the Woods, MN",
    "epa_source_county_label": "Lake of the Woods County",
    "county_or_equivalent_display": "Lake of the Woods County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lake of the Woods County",
    "census_2025_geoid": "27077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Le Sueur, MN",
    "epa_source_county_label": "Le Sueur County",
    "county_or_equivalent_display": "Le Sueur County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Le Sueur County",
    "census_2025_geoid": "27079",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lincoln, MN",
    "epa_source_county_label": "Lincoln County",
    "county_or_equivalent_display": "Lincoln County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lincoln County",
    "census_2025_geoid": "27081",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lyon, MN",
    "epa_source_county_label": "Lyon County",
    "county_or_equivalent_display": "Lyon County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lyon County",
    "census_2025_geoid": "27083",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mahnomen, MN",
    "epa_source_county_label": "Mahnomen County",
    "county_or_equivalent_display": "Mahnomen County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mahnomen County",
    "census_2025_geoid": "27087",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marshall, MN",
    "epa_source_county_label": "Marshall County",
    "county_or_equivalent_display": "Marshall County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marshall County",
    "census_2025_geoid": "27089",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Martin, MN",
    "epa_source_county_label": "Martin County",
    "county_or_equivalent_display": "Martin County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Martin County",
    "census_2025_geoid": "27091",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "McLeod, MN",
    "epa_source_county_label": "McLeod County",
    "county_or_equivalent_display": "McLeod County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "McLeod County",
    "census_2025_geoid": "27085",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Meeker, MN",
    "epa_source_county_label": "Meeker County",
    "county_or_equivalent_display": "Meeker County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Meeker County",
    "census_2025_geoid": "27093",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mille Lacs, MN",
    "epa_source_county_label": "Mille Lacs County",
    "county_or_equivalent_display": "Mille Lacs County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mille Lacs County",
    "census_2025_geoid": "27095",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Morrison, MN",
    "epa_source_county_label": "Morrison County",
    "county_or_equivalent_display": "Morrison County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Morrison County",
    "census_2025_geoid": "27097",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mower, MN",
    "epa_source_county_label": "Mower County",
    "county_or_equivalent_display": "Mower County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mower County",
    "census_2025_geoid": "27099",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Murray, MN",
    "epa_source_county_label": "Murray County",
    "county_or_equivalent_display": "Murray County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Murray County",
    "census_2025_geoid": "27101",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Nicollet, MN",
    "epa_source_county_label": "Nicollet County",
    "county_or_equivalent_display": "Nicollet County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Nicollet County",
    "census_2025_geoid": "27103",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Nobles, MN",
    "epa_source_county_label": "Nobles County",
    "county_or_equivalent_display": "Nobles County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Nobles County",
    "census_2025_geoid": "27105",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Norman, MN",
    "epa_source_county_label": "Norman County",
    "county_or_equivalent_display": "Norman County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Norman County",
    "census_2025_geoid": "27107",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Olmsted, MN",
    "epa_source_county_label": "Olmsted County",
    "county_or_equivalent_display": "Olmsted County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Olmsted County",
    "census_2025_geoid": "27109",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Otter Tail, MN",
    "epa_source_county_label": "Otter Tail County",
    "county_or_equivalent_display": "Otter Tail County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Otter Tail County",
    "census_2025_geoid": "27111",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pennington, MN",
    "epa_source_county_label": "Pennington County",
    "county_or_equivalent_display": "Pennington County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pennington County",
    "census_2025_geoid": "27113",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pine, MN",
    "epa_source_county_label": "Pine County",
    "county_or_equivalent_display": "Pine County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pine County",
    "census_2025_geoid": "27115",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pipestone, MN",
    "epa_source_county_label": "Pipestone County",
    "county_or_equivalent_display": "Pipestone County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pipestone County",
    "census_2025_geoid": "27117",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Polk, MN",
    "epa_source_county_label": "Polk County",
    "county_or_equivalent_display": "Polk County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Polk County",
    "census_2025_geoid": "27119",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pope, MN",
    "epa_source_county_label": "Pope County",
    "county_or_equivalent_display": "Pope County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pope County",
    "census_2025_geoid": "27121",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ramsey, MN",
    "epa_source_county_label": "Ramsey County",
    "county_or_equivalent_display": "Ramsey County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ramsey County",
    "census_2025_geoid": "27123",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Red Lake, MN",
    "epa_source_county_label": "Red Lake County",
    "county_or_equivalent_display": "Red Lake County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Red Lake County",
    "census_2025_geoid": "27125",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Redwood, MN",
    "epa_source_county_label": "Redwood County",
    "county_or_equivalent_display": "Redwood County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Redwood County",
    "census_2025_geoid": "27127",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Renville, MN",
    "epa_source_county_label": "Renville County",
    "county_or_equivalent_display": "Renville County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Renville County",
    "census_2025_geoid": "27129",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rice, MN",
    "epa_source_county_label": "Rice County",
    "county_or_equivalent_display": "Rice County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rice County",
    "census_2025_geoid": "27131",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rock, MN",
    "epa_source_county_label": "Rock County",
    "county_or_equivalent_display": "Rock County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rock County",
    "census_2025_geoid": "27133",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Roseau, MN",
    "epa_source_county_label": "Roseau County",
    "county_or_equivalent_display": "Roseau County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Roseau County",
    "census_2025_geoid": "27135",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Scott, MN",
    "epa_source_county_label": "Scott County",
    "county_or_equivalent_display": "Scott County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Scott County",
    "census_2025_geoid": "27139",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sherburne, MN",
    "epa_source_county_label": "Sherburne County",
    "county_or_equivalent_display": "Sherburne County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sherburne County",
    "census_2025_geoid": "27141",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sibley, MN",
    "epa_source_county_label": "Sibley County",
    "county_or_equivalent_display": "Sibley County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sibley County",
    "census_2025_geoid": "27143",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "St. Louis, MN",
    "epa_source_county_label": "St. Louis County",
    "county_or_equivalent_display": "St. Louis County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "St. Louis County",
    "census_2025_geoid": "27137",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Stearns, MN",
    "epa_source_county_label": "Stearns County",
    "county_or_equivalent_display": "Stearns County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Stearns County",
    "census_2025_geoid": "27145",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Steele, MN",
    "epa_source_county_label": "Steele County",
    "county_or_equivalent_display": "Steele County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Steele County",
    "census_2025_geoid": "27147",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Stevens, MN",
    "epa_source_county_label": "Stevens County",
    "county_or_equivalent_display": "Stevens County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Stevens County",
    "census_2025_geoid": "27149",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Swift, MN",
    "epa_source_county_label": "Swift County",
    "county_or_equivalent_display": "Swift County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Swift County",
    "census_2025_geoid": "27151",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Todd, MN",
    "epa_source_county_label": "Todd County",
    "county_or_equivalent_display": "Todd County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Todd County",
    "census_2025_geoid": "27153",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Traverse, MN",
    "epa_source_county_label": "Traverse County",
    "county_or_equivalent_display": "Traverse County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Traverse County",
    "census_2025_geoid": "27155",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wabasha, MN",
    "epa_source_county_label": "Wabasha County",
    "county_or_equivalent_display": "Wabasha County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wabasha County",
    "census_2025_geoid": "27157",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wadena, MN",
    "epa_source_county_label": "Wadena County",
    "county_or_equivalent_display": "Wadena County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wadena County",
    "census_2025_geoid": "27159",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Waseca, MN",
    "epa_source_county_label": "Waseca County",
    "county_or_equivalent_display": "Waseca County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Waseca County",
    "census_2025_geoid": "27161",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washington, MN",
    "epa_source_county_label": "Washington County",
    "county_or_equivalent_display": "Washington County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washington County",
    "census_2025_geoid": "27163",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Watonwan, MN",
    "epa_source_county_label": "Watonwan County",
    "county_or_equivalent_display": "Watonwan County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Watonwan County",
    "census_2025_geoid": "27165",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wilkin, MN",
    "epa_source_county_label": "Wilkin County",
    "county_or_equivalent_display": "Wilkin County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wilkin County",
    "census_2025_geoid": "27167",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Winona, MN",
    "epa_source_county_label": "Winona County",
    "county_or_equivalent_display": "Winona County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Winona County",
    "census_2025_geoid": "27169",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wright, MN",
    "epa_source_county_label": "Wright County",
    "county_or_equivalent_display": "Wright County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wright County",
    "census_2025_geoid": "27171",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Yellow Medicine, MN",
    "epa_source_county_label": "Yellow Medicine County",
    "county_or_equivalent_display": "Yellow Medicine County",
    "state_name": "Minnesota",
    "state_abbreviation": "MN",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Yellow Medicine County",
    "census_2025_geoid": "27173",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Adams, MS",
    "epa_source_county_label": "Adams County",
    "county_or_equivalent_display": "Adams County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Adams County",
    "census_2025_geoid": "28001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Alcorn, MS",
    "epa_source_county_label": "Alcorn County",
    "county_or_equivalent_display": "Alcorn County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Alcorn County",
    "census_2025_geoid": "28003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Amite, MS",
    "epa_source_county_label": "Amite County",
    "county_or_equivalent_display": "Amite County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Amite County",
    "census_2025_geoid": "28005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Attala, MS",
    "epa_source_county_label": "Attala County",
    "county_or_equivalent_display": "Attala County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Attala County",
    "census_2025_geoid": "28007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Benton, MS",
    "epa_source_county_label": "Benton County",
    "county_or_equivalent_display": "Benton County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Benton County",
    "census_2025_geoid": "28009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bolivar, MS",
    "epa_source_county_label": "Bolivar County",
    "county_or_equivalent_display": "Bolivar County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bolivar County",
    "census_2025_geoid": "28011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Calhoun, MS",
    "epa_source_county_label": "Calhoun County",
    "county_or_equivalent_display": "Calhoun County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Calhoun County",
    "census_2025_geoid": "28013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Carroll, MS",
    "epa_source_county_label": "Carroll County",
    "county_or_equivalent_display": "Carroll County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Carroll County",
    "census_2025_geoid": "28015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chickasaw, MS",
    "epa_source_county_label": "Chickasaw County",
    "county_or_equivalent_display": "Chickasaw County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chickasaw County",
    "census_2025_geoid": "28017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Choctaw, MS",
    "epa_source_county_label": "Choctaw County",
    "county_or_equivalent_display": "Choctaw County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Choctaw County",
    "census_2025_geoid": "28019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Claiborne, MS",
    "epa_source_county_label": "Claiborne County",
    "county_or_equivalent_display": "Claiborne County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Claiborne County",
    "census_2025_geoid": "28021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clarke, MS",
    "epa_source_county_label": "Clarke County",
    "county_or_equivalent_display": "Clarke County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clarke County",
    "census_2025_geoid": "28023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clay, MS",
    "epa_source_county_label": "Clay County",
    "county_or_equivalent_display": "Clay County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clay County",
    "census_2025_geoid": "28025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Coahoma, MS",
    "epa_source_county_label": "Coahoma County",
    "county_or_equivalent_display": "Coahoma County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Coahoma County",
    "census_2025_geoid": "28027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Copiah, MS",
    "epa_source_county_label": "Copiah County",
    "county_or_equivalent_display": "Copiah County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Copiah County",
    "census_2025_geoid": "28029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Covington, MS",
    "epa_source_county_label": "Covington County",
    "county_or_equivalent_display": "Covington County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Covington County",
    "census_2025_geoid": "28031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "DeSoto, MS",
    "epa_source_county_label": "DeSoto County",
    "county_or_equivalent_display": "DeSoto County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "DeSoto County",
    "census_2025_geoid": "28033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Forrest, MS",
    "epa_source_county_label": "Forrest County",
    "county_or_equivalent_display": "Forrest County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Forrest County",
    "census_2025_geoid": "28035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Franklin, MS",
    "epa_source_county_label": "Franklin County",
    "county_or_equivalent_display": "Franklin County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Franklin County",
    "census_2025_geoid": "28037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "George, MS",
    "epa_source_county_label": "George County",
    "county_or_equivalent_display": "George County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "George County",
    "census_2025_geoid": "28039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Greene, MS",
    "epa_source_county_label": "Greene County",
    "county_or_equivalent_display": "Greene County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Greene County",
    "census_2025_geoid": "28041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grenada, MS",
    "epa_source_county_label": "Grenada County",
    "county_or_equivalent_display": "Grenada County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grenada County",
    "census_2025_geoid": "28043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hancock, MS",
    "epa_source_county_label": "Hancock County",
    "county_or_equivalent_display": "Hancock County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hancock County",
    "census_2025_geoid": "28045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Harrison, MS",
    "epa_source_county_label": "Harrison County",
    "county_or_equivalent_display": "Harrison County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Harrison County",
    "census_2025_geoid": "28047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hinds, MS",
    "epa_source_county_label": "Hinds County",
    "county_or_equivalent_display": "Hinds County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hinds County",
    "census_2025_geoid": "28049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Holmes, MS",
    "epa_source_county_label": "Holmes County",
    "county_or_equivalent_display": "Holmes County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Holmes County",
    "census_2025_geoid": "28051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Humphreys, MS",
    "epa_source_county_label": "Humphreys County",
    "county_or_equivalent_display": "Humphreys County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Humphreys County",
    "census_2025_geoid": "28053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Issaquena, MS",
    "epa_source_county_label": "Issaquena County",
    "county_or_equivalent_display": "Issaquena County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Issaquena County",
    "census_2025_geoid": "28055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Itawamba, MS",
    "epa_source_county_label": "Itawamba County",
    "county_or_equivalent_display": "Itawamba County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Itawamba County",
    "census_2025_geoid": "28057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jackson, MS",
    "epa_source_county_label": "Jackson County",
    "county_or_equivalent_display": "Jackson County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jackson County",
    "census_2025_geoid": "28059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jasper, MS",
    "epa_source_county_label": "Jasper County",
    "county_or_equivalent_display": "Jasper County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jasper County",
    "census_2025_geoid": "28061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jefferson, MS",
    "epa_source_county_label": "Jefferson County",
    "county_or_equivalent_display": "Jefferson County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jefferson County",
    "census_2025_geoid": "28063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jefferson Davis, MS",
    "epa_source_county_label": "Jefferson Davis County",
    "county_or_equivalent_display": "Jefferson Davis County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jefferson Davis County",
    "census_2025_geoid": "28065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jones, MS",
    "epa_source_county_label": "Jones County",
    "county_or_equivalent_display": "Jones County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jones County",
    "census_2025_geoid": "28067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kemper, MS",
    "epa_source_county_label": "Kemper County",
    "county_or_equivalent_display": "Kemper County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kemper County",
    "census_2025_geoid": "28069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lafayette, MS",
    "epa_source_county_label": "Lafayette County",
    "county_or_equivalent_display": "Lafayette County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lafayette County",
    "census_2025_geoid": "28071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lamar, MS",
    "epa_source_county_label": "Lamar County",
    "county_or_equivalent_display": "Lamar County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lamar County",
    "census_2025_geoid": "28073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lauderdale, MS",
    "epa_source_county_label": "Lauderdale County",
    "county_or_equivalent_display": "Lauderdale County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lauderdale County",
    "census_2025_geoid": "28075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lawrence, MS",
    "epa_source_county_label": "Lawrence County",
    "county_or_equivalent_display": "Lawrence County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lawrence County",
    "census_2025_geoid": "28077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Leake, MS",
    "epa_source_county_label": "Leake County",
    "county_or_equivalent_display": "Leake County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Leake County",
    "census_2025_geoid": "28079",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lee, MS",
    "epa_source_county_label": "Lee County",
    "county_or_equivalent_display": "Lee County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lee County",
    "census_2025_geoid": "28081",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Leflore, MS",
    "epa_source_county_label": "Leflore County",
    "county_or_equivalent_display": "Leflore County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Leflore County",
    "census_2025_geoid": "28083",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lincoln, MS",
    "epa_source_county_label": "Lincoln County",
    "county_or_equivalent_display": "Lincoln County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lincoln County",
    "census_2025_geoid": "28085",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lowndes, MS",
    "epa_source_county_label": "Lowndes County",
    "county_or_equivalent_display": "Lowndes County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lowndes County",
    "census_2025_geoid": "28087",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Madison, MS",
    "epa_source_county_label": "Madison County",
    "county_or_equivalent_display": "Madison County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Madison County",
    "census_2025_geoid": "28089",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marion, MS",
    "epa_source_county_label": "Marion County",
    "county_or_equivalent_display": "Marion County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marion County",
    "census_2025_geoid": "28091",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marshall, MS",
    "epa_source_county_label": "Marshall County",
    "county_or_equivalent_display": "Marshall County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marshall County",
    "census_2025_geoid": "28093",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Monroe, MS",
    "epa_source_county_label": "Monroe County",
    "county_or_equivalent_display": "Monroe County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Monroe County",
    "census_2025_geoid": "28095",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Montgomery, MS",
    "epa_source_county_label": "Montgomery County",
    "county_or_equivalent_display": "Montgomery County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Montgomery County",
    "census_2025_geoid": "28097",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Neshoba, MS",
    "epa_source_county_label": "Neshoba County",
    "county_or_equivalent_display": "Neshoba County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Neshoba County",
    "census_2025_geoid": "28099",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Newton, MS",
    "epa_source_county_label": "Newton County",
    "county_or_equivalent_display": "Newton County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Newton County",
    "census_2025_geoid": "28101",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Noxubee, MS",
    "epa_source_county_label": "Noxubee County",
    "county_or_equivalent_display": "Noxubee County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Noxubee County",
    "census_2025_geoid": "28103",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Oktibbeha, MS",
    "epa_source_county_label": "Oktibbeha County",
    "county_or_equivalent_display": "Oktibbeha County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Oktibbeha County",
    "census_2025_geoid": "28105",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Panola, MS",
    "epa_source_county_label": "Panola County",
    "county_or_equivalent_display": "Panola County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Panola County",
    "census_2025_geoid": "28107",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pearl River, MS",
    "epa_source_county_label": "Pearl River County",
    "county_or_equivalent_display": "Pearl River County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pearl River County",
    "census_2025_geoid": "28109",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Perry, MS",
    "epa_source_county_label": "Perry County",
    "county_or_equivalent_display": "Perry County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Perry County",
    "census_2025_geoid": "28111",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pike, MS",
    "epa_source_county_label": "Pike County",
    "county_or_equivalent_display": "Pike County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pike County",
    "census_2025_geoid": "28113",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pontotoc, MS",
    "epa_source_county_label": "Pontotoc County",
    "county_or_equivalent_display": "Pontotoc County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pontotoc County",
    "census_2025_geoid": "28115",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Prentiss, MS",
    "epa_source_county_label": "Prentiss County",
    "county_or_equivalent_display": "Prentiss County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Prentiss County",
    "census_2025_geoid": "28117",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Quitman, MS",
    "epa_source_county_label": "Quitman County",
    "county_or_equivalent_display": "Quitman County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Quitman County",
    "census_2025_geoid": "28119",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rankin, MS",
    "epa_source_county_label": "Rankin County",
    "county_or_equivalent_display": "Rankin County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rankin County",
    "census_2025_geoid": "28121",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Scott, MS",
    "epa_source_county_label": "Scott County",
    "county_or_equivalent_display": "Scott County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Scott County",
    "census_2025_geoid": "28123",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sharkey, MS",
    "epa_source_county_label": "Sharkey County",
    "county_or_equivalent_display": "Sharkey County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sharkey County",
    "census_2025_geoid": "28125",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Simpson, MS",
    "epa_source_county_label": "Simpson County",
    "county_or_equivalent_display": "Simpson County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Simpson County",
    "census_2025_geoid": "28127",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Smith, MS",
    "epa_source_county_label": "Smith County",
    "county_or_equivalent_display": "Smith County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Smith County",
    "census_2025_geoid": "28129",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Stone, MS",
    "epa_source_county_label": "Stone County",
    "county_or_equivalent_display": "Stone County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Stone County",
    "census_2025_geoid": "28131",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sunflower, MS",
    "epa_source_county_label": "Sunflower County",
    "county_or_equivalent_display": "Sunflower County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sunflower County",
    "census_2025_geoid": "28133",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tallahatchie, MS",
    "epa_source_county_label": "Tallahatchie County",
    "county_or_equivalent_display": "Tallahatchie County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tallahatchie County",
    "census_2025_geoid": "28135",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tate, MS",
    "epa_source_county_label": "Tate County",
    "county_or_equivalent_display": "Tate County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tate County",
    "census_2025_geoid": "28137",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tippah, MS",
    "epa_source_county_label": "Tippah County",
    "county_or_equivalent_display": "Tippah County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tippah County",
    "census_2025_geoid": "28139",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tishomingo, MS",
    "epa_source_county_label": "Tishomingo County",
    "county_or_equivalent_display": "Tishomingo County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tishomingo County",
    "census_2025_geoid": "28141",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tunica, MS",
    "epa_source_county_label": "Tunica County",
    "county_or_equivalent_display": "Tunica County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tunica County",
    "census_2025_geoid": "28143",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Union, MS",
    "epa_source_county_label": "Union County",
    "county_or_equivalent_display": "Union County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Union County",
    "census_2025_geoid": "28145",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Walthall, MS",
    "epa_source_county_label": "Walthall County",
    "county_or_equivalent_display": "Walthall County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Walthall County",
    "census_2025_geoid": "28147",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Warren, MS",
    "epa_source_county_label": "Warren County",
    "county_or_equivalent_display": "Warren County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Warren County",
    "census_2025_geoid": "28149",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washington, MS",
    "epa_source_county_label": "Washington County",
    "county_or_equivalent_display": "Washington County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washington County",
    "census_2025_geoid": "28151",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wayne, MS",
    "epa_source_county_label": "Wayne County",
    "county_or_equivalent_display": "Wayne County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wayne County",
    "census_2025_geoid": "28153",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Webster, MS",
    "epa_source_county_label": "Webster County",
    "county_or_equivalent_display": "Webster County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Webster County",
    "census_2025_geoid": "28155",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wilkinson, MS",
    "epa_source_county_label": "Wilkinson County",
    "county_or_equivalent_display": "Wilkinson County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wilkinson County",
    "census_2025_geoid": "28157",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Winston, MS",
    "epa_source_county_label": "Winston County",
    "county_or_equivalent_display": "Winston County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Winston County",
    "census_2025_geoid": "28159",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Yalobusha, MS",
    "epa_source_county_label": "Yalobusha County",
    "county_or_equivalent_display": "Yalobusha County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Yalobusha County",
    "census_2025_geoid": "28161",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Yazoo, MS",
    "epa_source_county_label": "Yazoo County",
    "county_or_equivalent_display": "Yazoo County",
    "state_name": "Mississippi",
    "state_abbreviation": "MS",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Yazoo County",
    "census_2025_geoid": "28163",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Adair, MO",
    "epa_source_county_label": "Adair County",
    "county_or_equivalent_display": "Adair County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Adair County",
    "census_2025_geoid": "29001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Andrew, MO",
    "epa_source_county_label": "Andrew County",
    "county_or_equivalent_display": "Andrew County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Andrew County",
    "census_2025_geoid": "29003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Atchison, MO",
    "epa_source_county_label": "Atchison County",
    "county_or_equivalent_display": "Atchison County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Atchison County",
    "census_2025_geoid": "29005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Audrain, MO",
    "epa_source_county_label": "Audrain County",
    "county_or_equivalent_display": "Audrain County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Audrain County",
    "census_2025_geoid": "29007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Barry, MO",
    "epa_source_county_label": "Barry County",
    "county_or_equivalent_display": "Barry County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Barry County",
    "census_2025_geoid": "29009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Barton, MO",
    "epa_source_county_label": "Barton County",
    "county_or_equivalent_display": "Barton County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Barton County",
    "census_2025_geoid": "29011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bates, MO",
    "epa_source_county_label": "Bates County",
    "county_or_equivalent_display": "Bates County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bates County",
    "census_2025_geoid": "29013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Benton, MO",
    "epa_source_county_label": "Benton County",
    "county_or_equivalent_display": "Benton County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Benton County",
    "census_2025_geoid": "29015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bollinger, MO",
    "epa_source_county_label": "Bollinger County",
    "county_or_equivalent_display": "Bollinger County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bollinger County",
    "census_2025_geoid": "29017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Boone, MO",
    "epa_source_county_label": "Boone County",
    "county_or_equivalent_display": "Boone County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Boone County",
    "census_2025_geoid": "29019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Buchanan, MO",
    "epa_source_county_label": "Buchanan County",
    "county_or_equivalent_display": "Buchanan County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Buchanan County",
    "census_2025_geoid": "29021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Butler, MO",
    "epa_source_county_label": "Butler County",
    "county_or_equivalent_display": "Butler County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Butler County",
    "census_2025_geoid": "29023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Caldwell, MO",
    "epa_source_county_label": "Caldwell County",
    "county_or_equivalent_display": "Caldwell County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Caldwell County",
    "census_2025_geoid": "29025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Callaway, MO",
    "epa_source_county_label": "Callaway County",
    "county_or_equivalent_display": "Callaway County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Callaway County",
    "census_2025_geoid": "29027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Camden, MO",
    "epa_source_county_label": "Camden County",
    "county_or_equivalent_display": "Camden County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Camden County",
    "census_2025_geoid": "29029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cape Girardeau, MO",
    "epa_source_county_label": "Cape Girardeau County",
    "county_or_equivalent_display": "Cape Girardeau County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cape Girardeau County",
    "census_2025_geoid": "29031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Carroll, MO",
    "epa_source_county_label": "Carroll County",
    "county_or_equivalent_display": "Carroll County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Carroll County",
    "census_2025_geoid": "29033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Carter, MO",
    "epa_source_county_label": "Carter County",
    "county_or_equivalent_display": "Carter County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Carter County",
    "census_2025_geoid": "29035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cass, MO",
    "epa_source_county_label": "Cass County",
    "county_or_equivalent_display": "Cass County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cass County",
    "census_2025_geoid": "29037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cedar, MO",
    "epa_source_county_label": "Cedar County",
    "county_or_equivalent_display": "Cedar County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cedar County",
    "census_2025_geoid": "29039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chariton, MO",
    "epa_source_county_label": "Chariton County",
    "county_or_equivalent_display": "Chariton County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chariton County",
    "census_2025_geoid": "29041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Christian, MO",
    "epa_source_county_label": "Christian County",
    "county_or_equivalent_display": "Christian County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Christian County",
    "census_2025_geoid": "29043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clark, MO",
    "epa_source_county_label": "Clark County",
    "county_or_equivalent_display": "Clark County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clark County",
    "census_2025_geoid": "29045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clay, MO",
    "epa_source_county_label": "Clay County",
    "county_or_equivalent_display": "Clay County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clay County",
    "census_2025_geoid": "29047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clinton, MO",
    "epa_source_county_label": "Clinton County",
    "county_or_equivalent_display": "Clinton County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clinton County",
    "census_2025_geoid": "29049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cole, MO",
    "epa_source_county_label": "Cole County",
    "county_or_equivalent_display": "Cole County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cole County",
    "census_2025_geoid": "29051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cooper, MO",
    "epa_source_county_label": "Cooper County",
    "county_or_equivalent_display": "Cooper County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cooper County",
    "census_2025_geoid": "29053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Crawford, MO",
    "epa_source_county_label": "Crawford County",
    "county_or_equivalent_display": "Crawford County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Crawford County",
    "census_2025_geoid": "29055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dade, MO",
    "epa_source_county_label": "Dade County",
    "county_or_equivalent_display": "Dade County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dade County",
    "census_2025_geoid": "29057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dallas, MO",
    "epa_source_county_label": "Dallas County",
    "county_or_equivalent_display": "Dallas County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dallas County",
    "census_2025_geoid": "29059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Daviess, MO",
    "epa_source_county_label": "Daviess County",
    "county_or_equivalent_display": "Daviess County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Daviess County",
    "census_2025_geoid": "29061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "De Kalb, MO",
    "epa_source_county_label": "DeKalb County",
    "county_or_equivalent_display": "DeKalb County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "DeKalb County",
    "census_2025_geoid": "29063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dent, MO",
    "epa_source_county_label": "Dent County",
    "county_or_equivalent_display": "Dent County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dent County",
    "census_2025_geoid": "29065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Douglas, MO",
    "epa_source_county_label": "Douglas County",
    "county_or_equivalent_display": "Douglas County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Douglas County",
    "census_2025_geoid": "29067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dunklin, MO",
    "epa_source_county_label": "Dunklin County",
    "county_or_equivalent_display": "Dunklin County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dunklin County",
    "census_2025_geoid": "29069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Franklin, MO",
    "epa_source_county_label": "Franklin County",
    "county_or_equivalent_display": "Franklin County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Franklin County",
    "census_2025_geoid": "29071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gasconade, MO",
    "epa_source_county_label": "Gasconade County",
    "county_or_equivalent_display": "Gasconade County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gasconade County",
    "census_2025_geoid": "29073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gentry, MO",
    "epa_source_county_label": "Gentry County",
    "county_or_equivalent_display": "Gentry County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gentry County",
    "census_2025_geoid": "29075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Greene, MO",
    "epa_source_county_label": "Greene County",
    "county_or_equivalent_display": "Greene County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Greene County",
    "census_2025_geoid": "29077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grundy, MO",
    "epa_source_county_label": "Grundy County",
    "county_or_equivalent_display": "Grundy County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grundy County",
    "census_2025_geoid": "29079",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Harrison, MO",
    "epa_source_county_label": "Harrison County",
    "county_or_equivalent_display": "Harrison County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Harrison County",
    "census_2025_geoid": "29081",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Henry, MO",
    "epa_source_county_label": "Henry County",
    "county_or_equivalent_display": "Henry County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Henry County",
    "census_2025_geoid": "29083",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hickory, MO",
    "epa_source_county_label": "Hickory County",
    "county_or_equivalent_display": "Hickory County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hickory County",
    "census_2025_geoid": "29085",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Holt, MO",
    "epa_source_county_label": "Holt County",
    "county_or_equivalent_display": "Holt County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Holt County",
    "census_2025_geoid": "29087",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Howard, MO",
    "epa_source_county_label": "Howard County",
    "county_or_equivalent_display": "Howard County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Howard County",
    "census_2025_geoid": "29089",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Howell, MO",
    "epa_source_county_label": "Howell County",
    "county_or_equivalent_display": "Howell County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Howell County",
    "census_2025_geoid": "29091",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Iron, MO",
    "epa_source_county_label": "Iron County",
    "county_or_equivalent_display": "Iron County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Iron County",
    "census_2025_geoid": "29093",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jackson, MO",
    "epa_source_county_label": "Jackson County",
    "county_or_equivalent_display": "Jackson County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jackson County",
    "census_2025_geoid": "29095",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jasper, MO",
    "epa_source_county_label": "Jasper County",
    "county_or_equivalent_display": "Jasper County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jasper County",
    "census_2025_geoid": "29097",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jefferson, MO",
    "epa_source_county_label": "Jefferson County",
    "county_or_equivalent_display": "Jefferson County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jefferson County",
    "census_2025_geoid": "29099",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Johnson, MO",
    "epa_source_county_label": "Johnson County",
    "county_or_equivalent_display": "Johnson County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Johnson County",
    "census_2025_geoid": "29101",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Knox, MO",
    "epa_source_county_label": "Knox County",
    "county_or_equivalent_display": "Knox County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Knox County",
    "census_2025_geoid": "29103",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Laclede, MO",
    "epa_source_county_label": "Laclede County",
    "county_or_equivalent_display": "Laclede County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Laclede County",
    "census_2025_geoid": "29105",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lafayette, MO",
    "epa_source_county_label": "Lafayette County",
    "county_or_equivalent_display": "Lafayette County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lafayette County",
    "census_2025_geoid": "29107",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lawrence, MO",
    "epa_source_county_label": "Lawrence County",
    "county_or_equivalent_display": "Lawrence County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lawrence County",
    "census_2025_geoid": "29109",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lewis, MO",
    "epa_source_county_label": "Lewis County",
    "county_or_equivalent_display": "Lewis County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lewis County",
    "census_2025_geoid": "29111",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lincoln, MO",
    "epa_source_county_label": "Lincoln County",
    "county_or_equivalent_display": "Lincoln County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lincoln County",
    "census_2025_geoid": "29113",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Linn, MO",
    "epa_source_county_label": "Linn County",
    "county_or_equivalent_display": "Linn County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Linn County",
    "census_2025_geoid": "29115",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Livingston, MO",
    "epa_source_county_label": "Livingston County",
    "county_or_equivalent_display": "Livingston County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Livingston County",
    "census_2025_geoid": "29117",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Macon, MO",
    "epa_source_county_label": "Macon County",
    "county_or_equivalent_display": "Macon County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Macon County",
    "census_2025_geoid": "29121",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Madison, MO",
    "epa_source_county_label": "Madison County",
    "county_or_equivalent_display": "Madison County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Madison County",
    "census_2025_geoid": "29123",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Maries, MO",
    "epa_source_county_label": "Maries County",
    "county_or_equivalent_display": "Maries County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Maries County",
    "census_2025_geoid": "29125",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marion, MO",
    "epa_source_county_label": "Marion County",
    "county_or_equivalent_display": "Marion County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marion County",
    "census_2025_geoid": "29127",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "McDonald, MO",
    "epa_source_county_label": "McDonald County",
    "county_or_equivalent_display": "McDonald County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "McDonald County",
    "census_2025_geoid": "29119",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mercer, MO",
    "epa_source_county_label": "Mercer County",
    "county_or_equivalent_display": "Mercer County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mercer County",
    "census_2025_geoid": "29129",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Miller, MO",
    "epa_source_county_label": "Miller County",
    "county_or_equivalent_display": "Miller County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Miller County",
    "census_2025_geoid": "29131",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mississippi, MO",
    "epa_source_county_label": "Mississippi County",
    "county_or_equivalent_display": "Mississippi County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mississippi County",
    "census_2025_geoid": "29133",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Moniteau, MO",
    "epa_source_county_label": "Moniteau County",
    "county_or_equivalent_display": "Moniteau County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Moniteau County",
    "census_2025_geoid": "29135",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Monroe, MO",
    "epa_source_county_label": "Monroe County",
    "county_or_equivalent_display": "Monroe County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Monroe County",
    "census_2025_geoid": "29137",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Montgomery, MO",
    "epa_source_county_label": "Montgomery County",
    "county_or_equivalent_display": "Montgomery County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Montgomery County",
    "census_2025_geoid": "29139",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Morgan, MO",
    "epa_source_county_label": "Morgan County",
    "county_or_equivalent_display": "Morgan County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Morgan County",
    "census_2025_geoid": "29141",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "New Madrid, MO",
    "epa_source_county_label": "New Madrid County",
    "county_or_equivalent_display": "New Madrid County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "New Madrid County",
    "census_2025_geoid": "29143",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Newton, MO",
    "epa_source_county_label": "Newton County",
    "county_or_equivalent_display": "Newton County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Newton County",
    "census_2025_geoid": "29145",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Nodaway, MO",
    "epa_source_county_label": "Nodaway County",
    "county_or_equivalent_display": "Nodaway County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Nodaway County",
    "census_2025_geoid": "29147",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Oregon, MO",
    "epa_source_county_label": "Oregon County",
    "county_or_equivalent_display": "Oregon County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Oregon County",
    "census_2025_geoid": "29149",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Osage, MO",
    "epa_source_county_label": "Osage County",
    "county_or_equivalent_display": "Osage County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Osage County",
    "census_2025_geoid": "29151",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ozark, MO",
    "epa_source_county_label": "Ozark County",
    "county_or_equivalent_display": "Ozark County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ozark County",
    "census_2025_geoid": "29153",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pemiscot, MO",
    "epa_source_county_label": "Pemiscot County",
    "county_or_equivalent_display": "Pemiscot County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pemiscot County",
    "census_2025_geoid": "29155",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Perry, MO",
    "epa_source_county_label": "Perry County",
    "county_or_equivalent_display": "Perry County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Perry County",
    "census_2025_geoid": "29157",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pettis, MO",
    "epa_source_county_label": "Pettis County",
    "county_or_equivalent_display": "Pettis County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pettis County",
    "census_2025_geoid": "29159",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Phelps, MO",
    "epa_source_county_label": "Phelps County",
    "county_or_equivalent_display": "Phelps County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Phelps County",
    "census_2025_geoid": "29161",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pike, MO",
    "epa_source_county_label": "Pike County",
    "county_or_equivalent_display": "Pike County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pike County",
    "census_2025_geoid": "29163",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Platte, MO",
    "epa_source_county_label": "Platte County",
    "county_or_equivalent_display": "Platte County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Platte County",
    "census_2025_geoid": "29165",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Polk, MO",
    "epa_source_county_label": "Polk County",
    "county_or_equivalent_display": "Polk County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Polk County",
    "census_2025_geoid": "29167",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pulaski, MO",
    "epa_source_county_label": "Pulaski County",
    "county_or_equivalent_display": "Pulaski County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pulaski County",
    "census_2025_geoid": "29169",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Putnam, MO",
    "epa_source_county_label": "Putnam County",
    "county_or_equivalent_display": "Putnam County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Putnam County",
    "census_2025_geoid": "29171",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ralls, MO",
    "epa_source_county_label": "Ralls County",
    "county_or_equivalent_display": "Ralls County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ralls County",
    "census_2025_geoid": "29173",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Randolph, MO",
    "epa_source_county_label": "Randolph County",
    "county_or_equivalent_display": "Randolph County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Randolph County",
    "census_2025_geoid": "29175",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ray, MO",
    "epa_source_county_label": "Ray County",
    "county_or_equivalent_display": "Ray County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ray County",
    "census_2025_geoid": "29177",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Reynolds, MO",
    "epa_source_county_label": "Reynolds County",
    "county_or_equivalent_display": "Reynolds County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Reynolds County",
    "census_2025_geoid": "29179",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ripley, MO",
    "epa_source_county_label": "Ripley County",
    "county_or_equivalent_display": "Ripley County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ripley County",
    "census_2025_geoid": "29181",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Saline, MO",
    "epa_source_county_label": "Saline County",
    "county_or_equivalent_display": "Saline County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Saline County",
    "census_2025_geoid": "29195",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Schuyler, MO",
    "epa_source_county_label": "Schuyler County",
    "county_or_equivalent_display": "Schuyler County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Schuyler County",
    "census_2025_geoid": "29197",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Scotland, MO",
    "epa_source_county_label": "Scotland County",
    "county_or_equivalent_display": "Scotland County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Scotland County",
    "census_2025_geoid": "29199",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Scott, MO",
    "epa_source_county_label": "Scott County",
    "county_or_equivalent_display": "Scott County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Scott County",
    "census_2025_geoid": "29201",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Shannon, MO",
    "epa_source_county_label": "Shannon County",
    "county_or_equivalent_display": "Shannon County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Shannon County",
    "census_2025_geoid": "29203",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Shelby, MO",
    "epa_source_county_label": "Shelby County",
    "county_or_equivalent_display": "Shelby County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Shelby County",
    "census_2025_geoid": "29205",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "St. Charles, MO",
    "epa_source_county_label": "St. Charles County",
    "county_or_equivalent_display": "St. Charles County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "St. Charles County",
    "census_2025_geoid": "29183",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "St. Clair, MO",
    "epa_source_county_label": "St. Clair County",
    "county_or_equivalent_display": "St. Clair County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "St. Clair County",
    "census_2025_geoid": "29185",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "St. Francois, MO",
    "epa_source_county_label": "St. Francois County",
    "county_or_equivalent_display": "St. Francois County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "St. Francois County",
    "census_2025_geoid": "29187",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "St. Louis, MO",
    "epa_source_county_label": "St. Louis County",
    "county_or_equivalent_display": "St. Louis County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "St. Louis County",
    "census_2025_geoid": "29189",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "St. Louis city, MO",
    "epa_source_county_label": "St. Louis city",
    "county_or_equivalent_display": "St. Louis city",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "independent city",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "St. Louis city",
    "census_2025_geoid": "29510",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ste. Genevieve, MO",
    "epa_source_county_label": "Ste. Genevieve County",
    "county_or_equivalent_display": "Ste. Genevieve County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ste. Genevieve County",
    "census_2025_geoid": "29186",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Stoddard, MO",
    "epa_source_county_label": "Stoddard County",
    "county_or_equivalent_display": "Stoddard County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Stoddard County",
    "census_2025_geoid": "29207",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Stone, MO",
    "epa_source_county_label": "Stone County",
    "county_or_equivalent_display": "Stone County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Stone County",
    "census_2025_geoid": "29209",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sullivan, MO",
    "epa_source_county_label": "Sullivan County",
    "county_or_equivalent_display": "Sullivan County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sullivan County",
    "census_2025_geoid": "29211",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Taney, MO",
    "epa_source_county_label": "Taney County",
    "county_or_equivalent_display": "Taney County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Taney County",
    "census_2025_geoid": "29213",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Texas, MO",
    "epa_source_county_label": "Texas County",
    "county_or_equivalent_display": "Texas County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Texas County",
    "census_2025_geoid": "29215",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Vernon, MO",
    "epa_source_county_label": "Vernon County",
    "county_or_equivalent_display": "Vernon County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Vernon County",
    "census_2025_geoid": "29217",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Warren, MO",
    "epa_source_county_label": "Warren County",
    "county_or_equivalent_display": "Warren County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Warren County",
    "census_2025_geoid": "29219",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washington, MO",
    "epa_source_county_label": "Washington County",
    "county_or_equivalent_display": "Washington County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washington County",
    "census_2025_geoid": "29221",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wayne, MO",
    "epa_source_county_label": "Wayne County",
    "county_or_equivalent_display": "Wayne County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wayne County",
    "census_2025_geoid": "29223",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Webster, MO",
    "epa_source_county_label": "Webster County",
    "county_or_equivalent_display": "Webster County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Webster County",
    "census_2025_geoid": "29225",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Worth, MO",
    "epa_source_county_label": "Worth County",
    "county_or_equivalent_display": "Worth County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Worth County",
    "census_2025_geoid": "29227",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wright, MO",
    "epa_source_county_label": "Wright County",
    "county_or_equivalent_display": "Wright County",
    "state_name": "Missouri",
    "state_abbreviation": "MO",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wright County",
    "census_2025_geoid": "29229",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Beaverhead, MT",
    "epa_source_county_label": "Beaverhead County",
    "county_or_equivalent_display": "Beaverhead County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Beaverhead County",
    "census_2025_geoid": "30001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Big Horn, MT",
    "epa_source_county_label": "Big Horn County",
    "county_or_equivalent_display": "Big Horn County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Big Horn County",
    "census_2025_geoid": "30003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Blaine, MT",
    "epa_source_county_label": "Blaine County",
    "county_or_equivalent_display": "Blaine County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Blaine County",
    "census_2025_geoid": "30005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Broadwater, MT",
    "epa_source_county_label": "Broadwater County",
    "county_or_equivalent_display": "Broadwater County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Broadwater County",
    "census_2025_geoid": "30007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Carbon, MT",
    "epa_source_county_label": "Carbon County",
    "county_or_equivalent_display": "Carbon County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Carbon County",
    "census_2025_geoid": "30009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Carter, MT",
    "epa_source_county_label": "Carter County",
    "county_or_equivalent_display": "Carter County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Carter County",
    "census_2025_geoid": "30011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cascade, MT",
    "epa_source_county_label": "Cascade County",
    "county_or_equivalent_display": "Cascade County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cascade County",
    "census_2025_geoid": "30013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chouteau, MT",
    "epa_source_county_label": "Chouteau County",
    "county_or_equivalent_display": "Chouteau County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chouteau County",
    "census_2025_geoid": "30015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Custer, MT",
    "epa_source_county_label": "Custer County",
    "county_or_equivalent_display": "Custer County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Custer County",
    "census_2025_geoid": "30017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Daniels, MT",
    "epa_source_county_label": "Daniels County",
    "county_or_equivalent_display": "Daniels County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Daniels County",
    "census_2025_geoid": "30019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dawson, MT",
    "epa_source_county_label": "Dawson County",
    "county_or_equivalent_display": "Dawson County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dawson County",
    "census_2025_geoid": "30021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Deer Lodge, MT",
    "epa_source_county_label": "Deer Lodge County",
    "county_or_equivalent_display": "Deer Lodge County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Deer Lodge County",
    "census_2025_geoid": "30023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fallon, MT",
    "epa_source_county_label": "Fallon County",
    "county_or_equivalent_display": "Fallon County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fallon County",
    "census_2025_geoid": "30025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fergus, MT",
    "epa_source_county_label": "Fergus County",
    "county_or_equivalent_display": "Fergus County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fergus County",
    "census_2025_geoid": "30027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Flathead, MT",
    "epa_source_county_label": "Flathead County",
    "county_or_equivalent_display": "Flathead County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Flathead County",
    "census_2025_geoid": "30029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gallatin, MT",
    "epa_source_county_label": "Gallatin County",
    "county_or_equivalent_display": "Gallatin County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gallatin County",
    "census_2025_geoid": "30031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Garfield, MT",
    "epa_source_county_label": "Garfield County",
    "county_or_equivalent_display": "Garfield County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Garfield County",
    "census_2025_geoid": "30033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Glacier, MT",
    "epa_source_county_label": "Glacier County",
    "county_or_equivalent_display": "Glacier County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Glacier County",
    "census_2025_geoid": "30035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Golden Valley, MT",
    "epa_source_county_label": "Golden Valley County",
    "county_or_equivalent_display": "Golden Valley County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Golden Valley County",
    "census_2025_geoid": "30037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Granite, MT",
    "epa_source_county_label": "Granite County",
    "county_or_equivalent_display": "Granite County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Granite County",
    "census_2025_geoid": "30039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hill, MT",
    "epa_source_county_label": "Hill County",
    "county_or_equivalent_display": "Hill County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hill County",
    "census_2025_geoid": "30041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jefferson, MT",
    "epa_source_county_label": "Jefferson County",
    "county_or_equivalent_display": "Jefferson County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jefferson County",
    "census_2025_geoid": "30043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Judith Basin, MT",
    "epa_source_county_label": "Judith Basin County",
    "county_or_equivalent_display": "Judith Basin County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Judith Basin County",
    "census_2025_geoid": "30045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lake, MT",
    "epa_source_county_label": "Lake County",
    "county_or_equivalent_display": "Lake County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lake County",
    "census_2025_geoid": "30047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lewis and Clark, MT",
    "epa_source_county_label": "Lewis and Clark County",
    "county_or_equivalent_display": "Lewis and Clark County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lewis and Clark County",
    "census_2025_geoid": "30049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Liberty, MT",
    "epa_source_county_label": "Liberty County",
    "county_or_equivalent_display": "Liberty County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Liberty County",
    "census_2025_geoid": "30051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lincoln, MT",
    "epa_source_county_label": "Lincoln County",
    "county_or_equivalent_display": "Lincoln County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lincoln County",
    "census_2025_geoid": "30053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Madison, MT",
    "epa_source_county_label": "Madison County",
    "county_or_equivalent_display": "Madison County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Madison County",
    "census_2025_geoid": "30057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "McCone, MT",
    "epa_source_county_label": "McCone County",
    "county_or_equivalent_display": "McCone County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "McCone County",
    "census_2025_geoid": "30055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Meagher, MT",
    "epa_source_county_label": "Meagher County",
    "county_or_equivalent_display": "Meagher County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Meagher County",
    "census_2025_geoid": "30059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mineral, MT",
    "epa_source_county_label": "Mineral County",
    "county_or_equivalent_display": "Mineral County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mineral County",
    "census_2025_geoid": "30061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Missoula, MT",
    "epa_source_county_label": "Missoula County",
    "county_or_equivalent_display": "Missoula County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Missoula County",
    "census_2025_geoid": "30063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Musselshell, MT",
    "epa_source_county_label": "Musselshell County",
    "county_or_equivalent_display": "Musselshell County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Musselshell County",
    "census_2025_geoid": "30065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Park, MT",
    "epa_source_county_label": "Park County",
    "county_or_equivalent_display": "Park County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Park County",
    "census_2025_geoid": "30067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Petroleum, MT",
    "epa_source_county_label": "Petroleum County",
    "county_or_equivalent_display": "Petroleum County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Petroleum County",
    "census_2025_geoid": "30069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Phillips, MT",
    "epa_source_county_label": "Phillips County",
    "county_or_equivalent_display": "Phillips County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Phillips County",
    "census_2025_geoid": "30071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pondera, MT",
    "epa_source_county_label": "Pondera County",
    "county_or_equivalent_display": "Pondera County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pondera County",
    "census_2025_geoid": "30073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Powder River, MT",
    "epa_source_county_label": "Powder River County",
    "county_or_equivalent_display": "Powder River County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Powder River County",
    "census_2025_geoid": "30075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Powell, MT",
    "epa_source_county_label": "Powell County",
    "county_or_equivalent_display": "Powell County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Powell County",
    "census_2025_geoid": "30077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Prairie, MT",
    "epa_source_county_label": "Prairie County",
    "county_or_equivalent_display": "Prairie County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Prairie County",
    "census_2025_geoid": "30079",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ravalli, MT",
    "epa_source_county_label": "Ravalli County",
    "county_or_equivalent_display": "Ravalli County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ravalli County",
    "census_2025_geoid": "30081",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Richland, MT",
    "epa_source_county_label": "Richland County",
    "county_or_equivalent_display": "Richland County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Richland County",
    "census_2025_geoid": "30083",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Roosevelt, MT",
    "epa_source_county_label": "Roosevelt County",
    "county_or_equivalent_display": "Roosevelt County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Roosevelt County",
    "census_2025_geoid": "30085",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rosebud, MT",
    "epa_source_county_label": "Rosebud County",
    "county_or_equivalent_display": "Rosebud County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rosebud County",
    "census_2025_geoid": "30087",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sanders, MT",
    "epa_source_county_label": "Sanders County",
    "county_or_equivalent_display": "Sanders County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sanders County",
    "census_2025_geoid": "30089",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sheridan, MT",
    "epa_source_county_label": "Sheridan County",
    "county_or_equivalent_display": "Sheridan County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sheridan County",
    "census_2025_geoid": "30091",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Silver Bow, MT",
    "epa_source_county_label": "Silver Bow County",
    "county_or_equivalent_display": "Silver Bow County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Silver Bow County",
    "census_2025_geoid": "30093",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Stillwater, MT",
    "epa_source_county_label": "Stillwater County",
    "county_or_equivalent_display": "Stillwater County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Stillwater County",
    "census_2025_geoid": "30095",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sweet Grass, MT",
    "epa_source_county_label": "Sweet Grass County",
    "county_or_equivalent_display": "Sweet Grass County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sweet Grass County",
    "census_2025_geoid": "30097",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Teton, MT",
    "epa_source_county_label": "Teton County",
    "county_or_equivalent_display": "Teton County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Teton County",
    "census_2025_geoid": "30099",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Toole, MT",
    "epa_source_county_label": "Toole County",
    "county_or_equivalent_display": "Toole County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Toole County",
    "census_2025_geoid": "30101",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Treasure, MT",
    "epa_source_county_label": "Treasure County",
    "county_or_equivalent_display": "Treasure County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Treasure County",
    "census_2025_geoid": "30103",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Valley, MT",
    "epa_source_county_label": "Valley County",
    "county_or_equivalent_display": "Valley County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Valley County",
    "census_2025_geoid": "30105",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wheatland, MT",
    "epa_source_county_label": "Wheatland County",
    "county_or_equivalent_display": "Wheatland County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wheatland County",
    "census_2025_geoid": "30107",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wibaux, MT",
    "epa_source_county_label": "Wibaux County",
    "county_or_equivalent_display": "Wibaux County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wibaux County",
    "census_2025_geoid": "30109",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Yellowstone, MT",
    "epa_source_county_label": "Yellowstone County",
    "county_or_equivalent_display": "Yellowstone County",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Yellowstone County",
    "census_2025_geoid": "30111",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Yellowstone National Park, MT",
    "epa_source_county_label": "Yellowstone National Park, MT",
    "county_or_equivalent_display": "Yellowstone National Park, MT",
    "state_name": "Montana",
    "state_abbreviation": "MT",
    "geography_type": "legacy special source geography",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "legacy_or_unmatched",
    "census_2025_county_or_equivalent_name": "",
    "census_2025_geoid": "",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; current Census geography match intentionally left unresolved.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "EPA source geography has no direct name match in the 2025 Census file; no current GEOID was assigned and no zone was silently reallocated."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Adams, NE",
    "epa_source_county_label": "Adams County",
    "county_or_equivalent_display": "Adams County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Adams County",
    "census_2025_geoid": "31001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Antelope, NE",
    "epa_source_county_label": "Antelope County",
    "county_or_equivalent_display": "Antelope County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Antelope County",
    "census_2025_geoid": "31003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Arthur, NE",
    "epa_source_county_label": "Arthur County",
    "county_or_equivalent_display": "Arthur County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Arthur County",
    "census_2025_geoid": "31005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Banner, NE",
    "epa_source_county_label": "Banner County",
    "county_or_equivalent_display": "Banner County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Banner County",
    "census_2025_geoid": "31007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Blaine, NE",
    "epa_source_county_label": "Blaine County",
    "county_or_equivalent_display": "Blaine County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Blaine County",
    "census_2025_geoid": "31009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Boone, NE",
    "epa_source_county_label": "Boone County",
    "county_or_equivalent_display": "Boone County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Boone County",
    "census_2025_geoid": "31011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Box Butte, NE",
    "epa_source_county_label": "Box Butte County",
    "county_or_equivalent_display": "Box Butte County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Box Butte County",
    "census_2025_geoid": "31013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Boyd, NE",
    "epa_source_county_label": "Boyd County",
    "county_or_equivalent_display": "Boyd County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Boyd County",
    "census_2025_geoid": "31015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Brown, NE",
    "epa_source_county_label": "Brown County",
    "county_or_equivalent_display": "Brown County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Brown County",
    "census_2025_geoid": "31017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Buffalo, NE",
    "epa_source_county_label": "Buffalo County",
    "county_or_equivalent_display": "Buffalo County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Buffalo County",
    "census_2025_geoid": "31019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Burt, NE",
    "epa_source_county_label": "Burt County",
    "county_or_equivalent_display": "Burt County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Burt County",
    "census_2025_geoid": "31021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Butler, NE",
    "epa_source_county_label": "Butler County",
    "county_or_equivalent_display": "Butler County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Butler County",
    "census_2025_geoid": "31023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cass, NE",
    "epa_source_county_label": "Cass County",
    "county_or_equivalent_display": "Cass County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cass County",
    "census_2025_geoid": "31025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cedar, NE",
    "epa_source_county_label": "Cedar County",
    "county_or_equivalent_display": "Cedar County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cedar County",
    "census_2025_geoid": "31027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chase, NE",
    "epa_source_county_label": "Chase County",
    "county_or_equivalent_display": "Chase County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chase County",
    "census_2025_geoid": "31029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cherry, NE",
    "epa_source_county_label": "Cherry County",
    "county_or_equivalent_display": "Cherry County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cherry County",
    "census_2025_geoid": "31031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cheyenne, NE",
    "epa_source_county_label": "Cheyenne County",
    "county_or_equivalent_display": "Cheyenne County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cheyenne County",
    "census_2025_geoid": "31033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clay, NE",
    "epa_source_county_label": "Clay County",
    "county_or_equivalent_display": "Clay County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clay County",
    "census_2025_geoid": "31035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Colfax, NE",
    "epa_source_county_label": "Colfax County",
    "county_or_equivalent_display": "Colfax County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Colfax County",
    "census_2025_geoid": "31037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cuming, NE",
    "epa_source_county_label": "Cuming County",
    "county_or_equivalent_display": "Cuming County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cuming County",
    "census_2025_geoid": "31039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Custer, NE",
    "epa_source_county_label": "Custer County",
    "county_or_equivalent_display": "Custer County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Custer County",
    "census_2025_geoid": "31041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dakota, NE",
    "epa_source_county_label": "Dakota County",
    "county_or_equivalent_display": "Dakota County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dakota County",
    "census_2025_geoid": "31043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dawes, NE",
    "epa_source_county_label": "Dawes County",
    "county_or_equivalent_display": "Dawes County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dawes County",
    "census_2025_geoid": "31045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dawson, NE",
    "epa_source_county_label": "Dawson County",
    "county_or_equivalent_display": "Dawson County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dawson County",
    "census_2025_geoid": "31047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Deuel, NE",
    "epa_source_county_label": "Deuel County",
    "county_or_equivalent_display": "Deuel County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Deuel County",
    "census_2025_geoid": "31049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dixon, NE",
    "epa_source_county_label": "Dixon County",
    "county_or_equivalent_display": "Dixon County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dixon County",
    "census_2025_geoid": "31051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dodge, NE",
    "epa_source_county_label": "Dodge County",
    "county_or_equivalent_display": "Dodge County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dodge County",
    "census_2025_geoid": "31053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Douglas, NE",
    "epa_source_county_label": "Douglas County",
    "county_or_equivalent_display": "Douglas County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Douglas County",
    "census_2025_geoid": "31055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dundy, NE",
    "epa_source_county_label": "Dundy County",
    "county_or_equivalent_display": "Dundy County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dundy County",
    "census_2025_geoid": "31057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fillmore, NE",
    "epa_source_county_label": "Fillmore County",
    "county_or_equivalent_display": "Fillmore County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fillmore County",
    "census_2025_geoid": "31059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Franklin, NE",
    "epa_source_county_label": "Franklin County",
    "county_or_equivalent_display": "Franklin County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Franklin County",
    "census_2025_geoid": "31061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Frontier, NE",
    "epa_source_county_label": "Frontier County",
    "county_or_equivalent_display": "Frontier County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Frontier County",
    "census_2025_geoid": "31063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Furnas, NE",
    "epa_source_county_label": "Furnas County",
    "county_or_equivalent_display": "Furnas County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Furnas County",
    "census_2025_geoid": "31065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gage, NE",
    "epa_source_county_label": "Gage County",
    "county_or_equivalent_display": "Gage County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gage County",
    "census_2025_geoid": "31067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Garden, NE",
    "epa_source_county_label": "Garden County",
    "county_or_equivalent_display": "Garden County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Garden County",
    "census_2025_geoid": "31069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Garfield, NE",
    "epa_source_county_label": "Garfield County",
    "county_or_equivalent_display": "Garfield County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Garfield County",
    "census_2025_geoid": "31071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gosper, NE",
    "epa_source_county_label": "Gosper County",
    "county_or_equivalent_display": "Gosper County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gosper County",
    "census_2025_geoid": "31073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grant, NE",
    "epa_source_county_label": "Grant County",
    "county_or_equivalent_display": "Grant County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grant County",
    "census_2025_geoid": "31075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Greeley, NE",
    "epa_source_county_label": "Greeley County",
    "county_or_equivalent_display": "Greeley County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Greeley County",
    "census_2025_geoid": "31077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hall, NE",
    "epa_source_county_label": "Hall County",
    "county_or_equivalent_display": "Hall County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hall County",
    "census_2025_geoid": "31079",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hamilton, NE",
    "epa_source_county_label": "Hamilton County",
    "county_or_equivalent_display": "Hamilton County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hamilton County",
    "census_2025_geoid": "31081",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Harlan, NE",
    "epa_source_county_label": "Harlan County",
    "county_or_equivalent_display": "Harlan County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Harlan County",
    "census_2025_geoid": "31083",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hayes, NE",
    "epa_source_county_label": "Hayes County",
    "county_or_equivalent_display": "Hayes County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hayes County",
    "census_2025_geoid": "31085",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hitchcock, NE",
    "epa_source_county_label": "Hitchcock County",
    "county_or_equivalent_display": "Hitchcock County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hitchcock County",
    "census_2025_geoid": "31087",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Holt, NE",
    "epa_source_county_label": "Holt County",
    "county_or_equivalent_display": "Holt County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Holt County",
    "census_2025_geoid": "31089",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hooker, NE",
    "epa_source_county_label": "Hooker County",
    "county_or_equivalent_display": "Hooker County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hooker County",
    "census_2025_geoid": "31091",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Howard, NE",
    "epa_source_county_label": "Howard County",
    "county_or_equivalent_display": "Howard County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Howard County",
    "census_2025_geoid": "31093",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jefferson, NE",
    "epa_source_county_label": "Jefferson County",
    "county_or_equivalent_display": "Jefferson County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jefferson County",
    "census_2025_geoid": "31095",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Johnson, NE",
    "epa_source_county_label": "Johnson County",
    "county_or_equivalent_display": "Johnson County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Johnson County",
    "census_2025_geoid": "31097",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kearney, NE",
    "epa_source_county_label": "Kearney County",
    "county_or_equivalent_display": "Kearney County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kearney County",
    "census_2025_geoid": "31099",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Keith, NE",
    "epa_source_county_label": "Keith County",
    "county_or_equivalent_display": "Keith County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Keith County",
    "census_2025_geoid": "31101",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Keya Paha, NE",
    "epa_source_county_label": "Keya Paha County",
    "county_or_equivalent_display": "Keya Paha County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Keya Paha County",
    "census_2025_geoid": "31103",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kimball, NE",
    "epa_source_county_label": "Kimball County",
    "county_or_equivalent_display": "Kimball County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kimball County",
    "census_2025_geoid": "31105",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Knox, NE",
    "epa_source_county_label": "Knox County",
    "county_or_equivalent_display": "Knox County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Knox County",
    "census_2025_geoid": "31107",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lancaster, NE",
    "epa_source_county_label": "Lancaster County",
    "county_or_equivalent_display": "Lancaster County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lancaster County",
    "census_2025_geoid": "31109",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lincoln, NE",
    "epa_source_county_label": "Lincoln County",
    "county_or_equivalent_display": "Lincoln County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lincoln County",
    "census_2025_geoid": "31111",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Logan, NE",
    "epa_source_county_label": "Logan County",
    "county_or_equivalent_display": "Logan County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Logan County",
    "census_2025_geoid": "31113",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Loup, NE",
    "epa_source_county_label": "Loup County",
    "county_or_equivalent_display": "Loup County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Loup County",
    "census_2025_geoid": "31115",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Madison, NE",
    "epa_source_county_label": "Madison County",
    "county_or_equivalent_display": "Madison County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Madison County",
    "census_2025_geoid": "31119",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "McPherson, NE",
    "epa_source_county_label": "McPherson County",
    "county_or_equivalent_display": "McPherson County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "McPherson County",
    "census_2025_geoid": "31117",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Merrick, NE",
    "epa_source_county_label": "Merrick County",
    "county_or_equivalent_display": "Merrick County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Merrick County",
    "census_2025_geoid": "31121",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Morrill, NE",
    "epa_source_county_label": "Morrill County",
    "county_or_equivalent_display": "Morrill County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Morrill County",
    "census_2025_geoid": "31123",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Nance, NE",
    "epa_source_county_label": "Nance County",
    "county_or_equivalent_display": "Nance County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Nance County",
    "census_2025_geoid": "31125",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Nemaha, NE",
    "epa_source_county_label": "Nemaha County",
    "county_or_equivalent_display": "Nemaha County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Nemaha County",
    "census_2025_geoid": "31127",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Nuckolls, NE",
    "epa_source_county_label": "Nuckolls County",
    "county_or_equivalent_display": "Nuckolls County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Nuckolls County",
    "census_2025_geoid": "31129",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Otoe, NE",
    "epa_source_county_label": "Otoe County",
    "county_or_equivalent_display": "Otoe County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Otoe County",
    "census_2025_geoid": "31131",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pawnee, NE",
    "epa_source_county_label": "Pawnee County",
    "county_or_equivalent_display": "Pawnee County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pawnee County",
    "census_2025_geoid": "31133",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Perkins, NE",
    "epa_source_county_label": "Perkins County",
    "county_or_equivalent_display": "Perkins County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Perkins County",
    "census_2025_geoid": "31135",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Phelps, NE",
    "epa_source_county_label": "Phelps County",
    "county_or_equivalent_display": "Phelps County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Phelps County",
    "census_2025_geoid": "31137",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pierce, NE",
    "epa_source_county_label": "Pierce County",
    "county_or_equivalent_display": "Pierce County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pierce County",
    "census_2025_geoid": "31139",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Platte, NE",
    "epa_source_county_label": "Platte County",
    "county_or_equivalent_display": "Platte County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Platte County",
    "census_2025_geoid": "31141",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Polk, NE",
    "epa_source_county_label": "Polk County",
    "county_or_equivalent_display": "Polk County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Polk County",
    "census_2025_geoid": "31143",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Red Willow, NE",
    "epa_source_county_label": "Red Willow County",
    "county_or_equivalent_display": "Red Willow County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Red Willow County",
    "census_2025_geoid": "31145",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Richardson, NE",
    "epa_source_county_label": "Richardson County",
    "county_or_equivalent_display": "Richardson County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Richardson County",
    "census_2025_geoid": "31147",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rock, NE",
    "epa_source_county_label": "Rock County",
    "county_or_equivalent_display": "Rock County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rock County",
    "census_2025_geoid": "31149",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Saline, NE",
    "epa_source_county_label": "Saline County",
    "county_or_equivalent_display": "Saline County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Saline County",
    "census_2025_geoid": "31151",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sarpy, NE",
    "epa_source_county_label": "Sarpy County",
    "county_or_equivalent_display": "Sarpy County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sarpy County",
    "census_2025_geoid": "31153",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Saunders, NE",
    "epa_source_county_label": "Saunders County",
    "county_or_equivalent_display": "Saunders County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Saunders County",
    "census_2025_geoid": "31155",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Scotts Bluff, NE",
    "epa_source_county_label": "Scotts Bluff County",
    "county_or_equivalent_display": "Scotts Bluff County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Scotts Bluff County",
    "census_2025_geoid": "31157",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Seward, NE",
    "epa_source_county_label": "Seward County",
    "county_or_equivalent_display": "Seward County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Seward County",
    "census_2025_geoid": "31159",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sheridan, NE",
    "epa_source_county_label": "Sheridan County",
    "county_or_equivalent_display": "Sheridan County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sheridan County",
    "census_2025_geoid": "31161",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sherman, NE",
    "epa_source_county_label": "Sherman County",
    "county_or_equivalent_display": "Sherman County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sherman County",
    "census_2025_geoid": "31163",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sioux, NE",
    "epa_source_county_label": "Sioux County",
    "county_or_equivalent_display": "Sioux County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sioux County",
    "census_2025_geoid": "31165",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Stanton, NE",
    "epa_source_county_label": "Stanton County",
    "county_or_equivalent_display": "Stanton County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Stanton County",
    "census_2025_geoid": "31167",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Thayer, NE",
    "epa_source_county_label": "Thayer County",
    "county_or_equivalent_display": "Thayer County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Thayer County",
    "census_2025_geoid": "31169",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Thomas, NE",
    "epa_source_county_label": "Thomas County",
    "county_or_equivalent_display": "Thomas County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Thomas County",
    "census_2025_geoid": "31171",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Thurston, NE",
    "epa_source_county_label": "Thurston County",
    "county_or_equivalent_display": "Thurston County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Thurston County",
    "census_2025_geoid": "31173",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Valley, NE",
    "epa_source_county_label": "Valley County",
    "county_or_equivalent_display": "Valley County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Valley County",
    "census_2025_geoid": "31175",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washington, NE",
    "epa_source_county_label": "Washington County",
    "county_or_equivalent_display": "Washington County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washington County",
    "census_2025_geoid": "31177",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wayne, NE",
    "epa_source_county_label": "Wayne County",
    "county_or_equivalent_display": "Wayne County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wayne County",
    "census_2025_geoid": "31179",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Webster, NE",
    "epa_source_county_label": "Webster County",
    "county_or_equivalent_display": "Webster County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Webster County",
    "census_2025_geoid": "31181",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wheeler, NE",
    "epa_source_county_label": "Wheeler County",
    "county_or_equivalent_display": "Wheeler County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wheeler County",
    "census_2025_geoid": "31183",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "York, NE",
    "epa_source_county_label": "York County",
    "county_or_equivalent_display": "York County",
    "state_name": "Nebraska",
    "state_abbreviation": "NE",
    "geography_type": "county",
    "epa_region_source_value": "7",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "York County",
    "census_2025_geoid": "31185",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Carson City city, NV",
    "epa_source_county_label": "Carson City",
    "county_or_equivalent_display": "Carson City",
    "state_name": "Nevada",
    "state_abbreviation": "NV",
    "geography_type": "independent city",
    "epa_region_source_value": "9",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Carson City",
    "census_2025_geoid": "32510",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Churchill, NV",
    "epa_source_county_label": "Churchill County",
    "county_or_equivalent_display": "Churchill County",
    "state_name": "Nevada",
    "state_abbreviation": "NV",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Churchill County",
    "census_2025_geoid": "32001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clark, NV",
    "epa_source_county_label": "Clark County",
    "county_or_equivalent_display": "Clark County",
    "state_name": "Nevada",
    "state_abbreviation": "NV",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clark County",
    "census_2025_geoid": "32003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Douglas, NV",
    "epa_source_county_label": "Douglas County",
    "county_or_equivalent_display": "Douglas County",
    "state_name": "Nevada",
    "state_abbreviation": "NV",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Douglas County",
    "census_2025_geoid": "32005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Elko, NV",
    "epa_source_county_label": "Elko County",
    "county_or_equivalent_display": "Elko County",
    "state_name": "Nevada",
    "state_abbreviation": "NV",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Elko County",
    "census_2025_geoid": "32007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Esmeralda, NV",
    "epa_source_county_label": "Esmeralda County",
    "county_or_equivalent_display": "Esmeralda County",
    "state_name": "Nevada",
    "state_abbreviation": "NV",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Esmeralda County",
    "census_2025_geoid": "32009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Eureka, NV",
    "epa_source_county_label": "Eureka County",
    "county_or_equivalent_display": "Eureka County",
    "state_name": "Nevada",
    "state_abbreviation": "NV",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Eureka County",
    "census_2025_geoid": "32011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Humboldt, NV",
    "epa_source_county_label": "Humboldt County",
    "county_or_equivalent_display": "Humboldt County",
    "state_name": "Nevada",
    "state_abbreviation": "NV",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Humboldt County",
    "census_2025_geoid": "32013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lander, NV",
    "epa_source_county_label": "Lander County",
    "county_or_equivalent_display": "Lander County",
    "state_name": "Nevada",
    "state_abbreviation": "NV",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lander County",
    "census_2025_geoid": "32015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lincoln, NV",
    "epa_source_county_label": "Lincoln County",
    "county_or_equivalent_display": "Lincoln County",
    "state_name": "Nevada",
    "state_abbreviation": "NV",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lincoln County",
    "census_2025_geoid": "32017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lyon, NV",
    "epa_source_county_label": "Lyon County",
    "county_or_equivalent_display": "Lyon County",
    "state_name": "Nevada",
    "state_abbreviation": "NV",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lyon County",
    "census_2025_geoid": "32019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mineral, NV",
    "epa_source_county_label": "Mineral County",
    "county_or_equivalent_display": "Mineral County",
    "state_name": "Nevada",
    "state_abbreviation": "NV",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mineral County",
    "census_2025_geoid": "32021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Nye, NV",
    "epa_source_county_label": "Nye County",
    "county_or_equivalent_display": "Nye County",
    "state_name": "Nevada",
    "state_abbreviation": "NV",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Nye County",
    "census_2025_geoid": "32023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pershing, NV",
    "epa_source_county_label": "Pershing County",
    "county_or_equivalent_display": "Pershing County",
    "state_name": "Nevada",
    "state_abbreviation": "NV",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pershing County",
    "census_2025_geoid": "32027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Storey, NV",
    "epa_source_county_label": "Storey County",
    "county_or_equivalent_display": "Storey County",
    "state_name": "Nevada",
    "state_abbreviation": "NV",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Storey County",
    "census_2025_geoid": "32029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washoe, NV",
    "epa_source_county_label": "Washoe County",
    "county_or_equivalent_display": "Washoe County",
    "state_name": "Nevada",
    "state_abbreviation": "NV",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washoe County",
    "census_2025_geoid": "32031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "White Pine, NV",
    "epa_source_county_label": "White Pine County",
    "county_or_equivalent_display": "White Pine County",
    "state_name": "Nevada",
    "state_abbreviation": "NV",
    "geography_type": "county",
    "epa_region_source_value": "9",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "White Pine County",
    "census_2025_geoid": "32033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Belknap, NH",
    "epa_source_county_label": "Belknap County",
    "county_or_equivalent_display": "Belknap County",
    "state_name": "New Hampshire",
    "state_abbreviation": "NH",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Belknap County",
    "census_2025_geoid": "33001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Carroll, NH",
    "epa_source_county_label": "Carroll County",
    "county_or_equivalent_display": "Carroll County",
    "state_name": "New Hampshire",
    "state_abbreviation": "NH",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Carroll County",
    "census_2025_geoid": "33003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cheshire, NH",
    "epa_source_county_label": "Cheshire County",
    "county_or_equivalent_display": "Cheshire County",
    "state_name": "New Hampshire",
    "state_abbreviation": "NH",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cheshire County",
    "census_2025_geoid": "33005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Coos, NH",
    "epa_source_county_label": "Coos County",
    "county_or_equivalent_display": "Coos County",
    "state_name": "New Hampshire",
    "state_abbreviation": "NH",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Coos County",
    "census_2025_geoid": "33007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grafton, NH",
    "epa_source_county_label": "Grafton County",
    "county_or_equivalent_display": "Grafton County",
    "state_name": "New Hampshire",
    "state_abbreviation": "NH",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grafton County",
    "census_2025_geoid": "33009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hillsborough, NH",
    "epa_source_county_label": "Hillsborough County",
    "county_or_equivalent_display": "Hillsborough County",
    "state_name": "New Hampshire",
    "state_abbreviation": "NH",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hillsborough County",
    "census_2025_geoid": "33011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Merrimack, NH",
    "epa_source_county_label": "Merrimack County",
    "county_or_equivalent_display": "Merrimack County",
    "state_name": "New Hampshire",
    "state_abbreviation": "NH",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Merrimack County",
    "census_2025_geoid": "33013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rockingham, NH",
    "epa_source_county_label": "Rockingham County",
    "county_or_equivalent_display": "Rockingham County",
    "state_name": "New Hampshire",
    "state_abbreviation": "NH",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rockingham County",
    "census_2025_geoid": "33015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Strafford, NH",
    "epa_source_county_label": "Strafford County",
    "county_or_equivalent_display": "Strafford County",
    "state_name": "New Hampshire",
    "state_abbreviation": "NH",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Strafford County",
    "census_2025_geoid": "33017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sullivan, NH",
    "epa_source_county_label": "Sullivan County",
    "county_or_equivalent_display": "Sullivan County",
    "state_name": "New Hampshire",
    "state_abbreviation": "NH",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sullivan County",
    "census_2025_geoid": "33019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Atlantic, NJ",
    "epa_source_county_label": "Atlantic County",
    "county_or_equivalent_display": "Atlantic County",
    "state_name": "New Jersey",
    "state_abbreviation": "NJ",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Atlantic County",
    "census_2025_geoid": "34001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bergen, NJ",
    "epa_source_county_label": "Bergen County",
    "county_or_equivalent_display": "Bergen County",
    "state_name": "New Jersey",
    "state_abbreviation": "NJ",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bergen County",
    "census_2025_geoid": "34003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Burlington, NJ",
    "epa_source_county_label": "Burlington County",
    "county_or_equivalent_display": "Burlington County",
    "state_name": "New Jersey",
    "state_abbreviation": "NJ",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Burlington County",
    "census_2025_geoid": "34005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Camden, NJ",
    "epa_source_county_label": "Camden County",
    "county_or_equivalent_display": "Camden County",
    "state_name": "New Jersey",
    "state_abbreviation": "NJ",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Camden County",
    "census_2025_geoid": "34007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cape May, NJ",
    "epa_source_county_label": "Cape May County",
    "county_or_equivalent_display": "Cape May County",
    "state_name": "New Jersey",
    "state_abbreviation": "NJ",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cape May County",
    "census_2025_geoid": "34009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cumberland, NJ",
    "epa_source_county_label": "Cumberland County",
    "county_or_equivalent_display": "Cumberland County",
    "state_name": "New Jersey",
    "state_abbreviation": "NJ",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cumberland County",
    "census_2025_geoid": "34011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Essex, NJ",
    "epa_source_county_label": "Essex County",
    "county_or_equivalent_display": "Essex County",
    "state_name": "New Jersey",
    "state_abbreviation": "NJ",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Essex County",
    "census_2025_geoid": "34013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gloucester, NJ",
    "epa_source_county_label": "Gloucester County",
    "county_or_equivalent_display": "Gloucester County",
    "state_name": "New Jersey",
    "state_abbreviation": "NJ",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gloucester County",
    "census_2025_geoid": "34015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hudson, NJ",
    "epa_source_county_label": "Hudson County",
    "county_or_equivalent_display": "Hudson County",
    "state_name": "New Jersey",
    "state_abbreviation": "NJ",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hudson County",
    "census_2025_geoid": "34017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hunterdon, NJ",
    "epa_source_county_label": "Hunterdon County",
    "county_or_equivalent_display": "Hunterdon County",
    "state_name": "New Jersey",
    "state_abbreviation": "NJ",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hunterdon County",
    "census_2025_geoid": "34019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mercer, NJ",
    "epa_source_county_label": "Mercer County",
    "county_or_equivalent_display": "Mercer County",
    "state_name": "New Jersey",
    "state_abbreviation": "NJ",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mercer County",
    "census_2025_geoid": "34021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Middlesex, NJ",
    "epa_source_county_label": "Middlesex County",
    "county_or_equivalent_display": "Middlesex County",
    "state_name": "New Jersey",
    "state_abbreviation": "NJ",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Middlesex County",
    "census_2025_geoid": "34023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Monmouth, NJ",
    "epa_source_county_label": "Monmouth County",
    "county_or_equivalent_display": "Monmouth County",
    "state_name": "New Jersey",
    "state_abbreviation": "NJ",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Monmouth County",
    "census_2025_geoid": "34025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Morris, NJ",
    "epa_source_county_label": "Morris County",
    "county_or_equivalent_display": "Morris County",
    "state_name": "New Jersey",
    "state_abbreviation": "NJ",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Morris County",
    "census_2025_geoid": "34027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ocean, NJ",
    "epa_source_county_label": "Ocean County",
    "county_or_equivalent_display": "Ocean County",
    "state_name": "New Jersey",
    "state_abbreviation": "NJ",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ocean County",
    "census_2025_geoid": "34029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Passaic, NJ",
    "epa_source_county_label": "Passaic County",
    "county_or_equivalent_display": "Passaic County",
    "state_name": "New Jersey",
    "state_abbreviation": "NJ",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Passaic County",
    "census_2025_geoid": "34031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Salem, NJ",
    "epa_source_county_label": "Salem County",
    "county_or_equivalent_display": "Salem County",
    "state_name": "New Jersey",
    "state_abbreviation": "NJ",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Salem County",
    "census_2025_geoid": "34033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Somerset, NJ",
    "epa_source_county_label": "Somerset County",
    "county_or_equivalent_display": "Somerset County",
    "state_name": "New Jersey",
    "state_abbreviation": "NJ",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Somerset County",
    "census_2025_geoid": "34035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sussex, NJ",
    "epa_source_county_label": "Sussex County",
    "county_or_equivalent_display": "Sussex County",
    "state_name": "New Jersey",
    "state_abbreviation": "NJ",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sussex County",
    "census_2025_geoid": "34037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Union, NJ",
    "epa_source_county_label": "Union County",
    "county_or_equivalent_display": "Union County",
    "state_name": "New Jersey",
    "state_abbreviation": "NJ",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Union County",
    "census_2025_geoid": "34039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Warren, NJ",
    "epa_source_county_label": "Warren County",
    "county_or_equivalent_display": "Warren County",
    "state_name": "New Jersey",
    "state_abbreviation": "NJ",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Warren County",
    "census_2025_geoid": "34041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bernalillo, NM",
    "epa_source_county_label": "Bernalillo County",
    "county_or_equivalent_display": "Bernalillo County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bernalillo County",
    "census_2025_geoid": "35001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Catron, NM",
    "epa_source_county_label": "Catron County",
    "county_or_equivalent_display": "Catron County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Catron County",
    "census_2025_geoid": "35003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chaves, NM",
    "epa_source_county_label": "Chaves County",
    "county_or_equivalent_display": "Chaves County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chaves County",
    "census_2025_geoid": "35005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cibola, NM",
    "epa_source_county_label": "Cibola County",
    "county_or_equivalent_display": "Cibola County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cibola County",
    "census_2025_geoid": "35006",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Colfax, NM",
    "epa_source_county_label": "Colfax County",
    "county_or_equivalent_display": "Colfax County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Colfax County",
    "census_2025_geoid": "35007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Curry, NM",
    "epa_source_county_label": "Curry County",
    "county_or_equivalent_display": "Curry County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Curry County",
    "census_2025_geoid": "35009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "De Baca, NM",
    "epa_source_county_label": "De Baca County",
    "county_or_equivalent_display": "De Baca County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "De Baca County",
    "census_2025_geoid": "35011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dona Ana, NM",
    "epa_source_county_label": "Dona Ana County",
    "county_or_equivalent_display": "Dona Ana County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Doña Ana County",
    "census_2025_geoid": "35013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Eddy, NM",
    "epa_source_county_label": "Eddy County",
    "county_or_equivalent_display": "Eddy County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Eddy County",
    "census_2025_geoid": "35015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grant, NM",
    "epa_source_county_label": "Grant County",
    "county_or_equivalent_display": "Grant County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grant County",
    "census_2025_geoid": "35017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Guadalupe, NM",
    "epa_source_county_label": "Guadalupe County",
    "county_or_equivalent_display": "Guadalupe County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Guadalupe County",
    "census_2025_geoid": "35019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Harding, NM",
    "epa_source_county_label": "Harding County",
    "county_or_equivalent_display": "Harding County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Harding County",
    "census_2025_geoid": "35021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hidalgo, NM",
    "epa_source_county_label": "Hidalgo County",
    "county_or_equivalent_display": "Hidalgo County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hidalgo County",
    "census_2025_geoid": "35023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lea, NM",
    "epa_source_county_label": "Lea County",
    "county_or_equivalent_display": "Lea County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lea County",
    "census_2025_geoid": "35025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lincoln, NM",
    "epa_source_county_label": "Lincoln County",
    "county_or_equivalent_display": "Lincoln County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lincoln County",
    "census_2025_geoid": "35027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Los Alamos, NM",
    "epa_source_county_label": "Los Alamos County",
    "county_or_equivalent_display": "Los Alamos County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Los Alamos County",
    "census_2025_geoid": "35028",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Luna, NM",
    "epa_source_county_label": "Luna County",
    "county_or_equivalent_display": "Luna County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Luna County",
    "census_2025_geoid": "35029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "McKinley, NM",
    "epa_source_county_label": "McKinley County",
    "county_or_equivalent_display": "McKinley County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "McKinley County",
    "census_2025_geoid": "35031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mora, NM",
    "epa_source_county_label": "Mora County",
    "county_or_equivalent_display": "Mora County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mora County",
    "census_2025_geoid": "35033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Otero, NM",
    "epa_source_county_label": "Otero County",
    "county_or_equivalent_display": "Otero County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Otero County",
    "census_2025_geoid": "35035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Quay, NM",
    "epa_source_county_label": "Quay County",
    "county_or_equivalent_display": "Quay County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Quay County",
    "census_2025_geoid": "35037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rio Arriba, NM",
    "epa_source_county_label": "Rio Arriba County",
    "county_or_equivalent_display": "Rio Arriba County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rio Arriba County",
    "census_2025_geoid": "35039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Roosevelt, NM",
    "epa_source_county_label": "Roosevelt County",
    "county_or_equivalent_display": "Roosevelt County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Roosevelt County",
    "census_2025_geoid": "35041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "San Juan, NM",
    "epa_source_county_label": "San Juan County",
    "county_or_equivalent_display": "San Juan County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "San Juan County",
    "census_2025_geoid": "35045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "San Miguel, NM",
    "epa_source_county_label": "San Miguel County",
    "county_or_equivalent_display": "San Miguel County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "San Miguel County",
    "census_2025_geoid": "35047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sandoval, NM",
    "epa_source_county_label": "Sandoval County",
    "county_or_equivalent_display": "Sandoval County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sandoval County",
    "census_2025_geoid": "35043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Santa Fe, NM",
    "epa_source_county_label": "Santa Fe County",
    "county_or_equivalent_display": "Santa Fe County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Santa Fe County",
    "census_2025_geoid": "35049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sierra, NM",
    "epa_source_county_label": "Sierra County",
    "county_or_equivalent_display": "Sierra County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sierra County",
    "census_2025_geoid": "35051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Socorro, NM",
    "epa_source_county_label": "Socorro County",
    "county_or_equivalent_display": "Socorro County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Socorro County",
    "census_2025_geoid": "35053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Taos, NM",
    "epa_source_county_label": "Taos County",
    "county_or_equivalent_display": "Taos County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Taos County",
    "census_2025_geoid": "35055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Torrance, NM",
    "epa_source_county_label": "Torrance County",
    "county_or_equivalent_display": "Torrance County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Torrance County",
    "census_2025_geoid": "35057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Union, NM",
    "epa_source_county_label": "Union County",
    "county_or_equivalent_display": "Union County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Union County",
    "census_2025_geoid": "35059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Valencia, NM",
    "epa_source_county_label": "Valencia County",
    "county_or_equivalent_display": "Valencia County",
    "state_name": "New Mexico",
    "state_abbreviation": "NM",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Valencia County",
    "census_2025_geoid": "35061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Albany, NY",
    "epa_source_county_label": "Albany County",
    "county_or_equivalent_display": "Albany County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Albany County",
    "census_2025_geoid": "36001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Allegany, NY",
    "epa_source_county_label": "Allegany County",
    "county_or_equivalent_display": "Allegany County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Allegany County",
    "census_2025_geoid": "36003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bronx, NY",
    "epa_source_county_label": "Bronx County",
    "county_or_equivalent_display": "Bronx County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bronx County",
    "census_2025_geoid": "36005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Broome, NY",
    "epa_source_county_label": "Broome County",
    "county_or_equivalent_display": "Broome County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Broome County",
    "census_2025_geoid": "36007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cattaraugus, NY",
    "epa_source_county_label": "Cattaraugus County",
    "county_or_equivalent_display": "Cattaraugus County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cattaraugus County",
    "census_2025_geoid": "36009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cayuga, NY",
    "epa_source_county_label": "Cayuga County",
    "county_or_equivalent_display": "Cayuga County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cayuga County",
    "census_2025_geoid": "36011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chautauqua, NY",
    "epa_source_county_label": "Chautauqua County",
    "county_or_equivalent_display": "Chautauqua County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chautauqua County",
    "census_2025_geoid": "36013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chemung, NY",
    "epa_source_county_label": "Chemung County",
    "county_or_equivalent_display": "Chemung County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chemung County",
    "census_2025_geoid": "36015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chenango, NY",
    "epa_source_county_label": "Chenango County",
    "county_or_equivalent_display": "Chenango County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chenango County",
    "census_2025_geoid": "36017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clinton, NY",
    "epa_source_county_label": "Clinton County",
    "county_or_equivalent_display": "Clinton County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clinton County",
    "census_2025_geoid": "36019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Columbia, NY",
    "epa_source_county_label": "Columbia County",
    "county_or_equivalent_display": "Columbia County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Columbia County",
    "census_2025_geoid": "36021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cortland, NY",
    "epa_source_county_label": "Cortland County",
    "county_or_equivalent_display": "Cortland County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cortland County",
    "census_2025_geoid": "36023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Delaware, NY",
    "epa_source_county_label": "Delaware County",
    "county_or_equivalent_display": "Delaware County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Delaware County",
    "census_2025_geoid": "36025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dutchess, NY",
    "epa_source_county_label": "Dutchess County",
    "county_or_equivalent_display": "Dutchess County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dutchess County",
    "census_2025_geoid": "36027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Erie, NY",
    "epa_source_county_label": "Erie County",
    "county_or_equivalent_display": "Erie County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Erie County",
    "census_2025_geoid": "36029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Essex, NY",
    "epa_source_county_label": "Essex County",
    "county_or_equivalent_display": "Essex County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Essex County",
    "census_2025_geoid": "36031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Franklin, NY",
    "epa_source_county_label": "Franklin County",
    "county_or_equivalent_display": "Franklin County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Franklin County",
    "census_2025_geoid": "36033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fulton, NY",
    "epa_source_county_label": "Fulton County",
    "county_or_equivalent_display": "Fulton County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fulton County",
    "census_2025_geoid": "36035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Genesee, NY",
    "epa_source_county_label": "Genesee County",
    "county_or_equivalent_display": "Genesee County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Genesee County",
    "census_2025_geoid": "36037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Greene, NY",
    "epa_source_county_label": "Greene County",
    "county_or_equivalent_display": "Greene County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Greene County",
    "census_2025_geoid": "36039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hamilton, NY",
    "epa_source_county_label": "Hamilton County",
    "county_or_equivalent_display": "Hamilton County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hamilton County",
    "census_2025_geoid": "36041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Herkimer, NY",
    "epa_source_county_label": "Herkimer County",
    "county_or_equivalent_display": "Herkimer County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Herkimer County",
    "census_2025_geoid": "36043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jefferson, NY",
    "epa_source_county_label": "Jefferson County",
    "county_or_equivalent_display": "Jefferson County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jefferson County",
    "census_2025_geoid": "36045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kings, NY",
    "epa_source_county_label": "Kings County",
    "county_or_equivalent_display": "Kings County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kings County",
    "census_2025_geoid": "36047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lewis, NY",
    "epa_source_county_label": "Lewis County",
    "county_or_equivalent_display": "Lewis County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lewis County",
    "census_2025_geoid": "36049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Livingston, NY",
    "epa_source_county_label": "Livingston County",
    "county_or_equivalent_display": "Livingston County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Livingston County",
    "census_2025_geoid": "36051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Madison, NY",
    "epa_source_county_label": "Madison County",
    "county_or_equivalent_display": "Madison County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Madison County",
    "census_2025_geoid": "36053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Monroe, NY",
    "epa_source_county_label": "Monroe County",
    "county_or_equivalent_display": "Monroe County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Monroe County",
    "census_2025_geoid": "36055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Montgomery, NY",
    "epa_source_county_label": "Montgomery County",
    "county_or_equivalent_display": "Montgomery County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Montgomery County",
    "census_2025_geoid": "36057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Nassau, NY",
    "epa_source_county_label": "Nassau County",
    "county_or_equivalent_display": "Nassau County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Nassau County",
    "census_2025_geoid": "36059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "New York, NY",
    "epa_source_county_label": "New York County",
    "county_or_equivalent_display": "New York County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "New York County",
    "census_2025_geoid": "36061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Niagara, NY",
    "epa_source_county_label": "Niagara County",
    "county_or_equivalent_display": "Niagara County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Niagara County",
    "census_2025_geoid": "36063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Oneida, NY",
    "epa_source_county_label": "Oneida County",
    "county_or_equivalent_display": "Oneida County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Oneida County",
    "census_2025_geoid": "36065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Onondaga, NY",
    "epa_source_county_label": "Onondaga County",
    "county_or_equivalent_display": "Onondaga County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Onondaga County",
    "census_2025_geoid": "36067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ontario, NY",
    "epa_source_county_label": "Ontario County",
    "county_or_equivalent_display": "Ontario County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ontario County",
    "census_2025_geoid": "36069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Orange, NY",
    "epa_source_county_label": "Orange County",
    "county_or_equivalent_display": "Orange County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Orange County",
    "census_2025_geoid": "36071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Orleans, NY",
    "epa_source_county_label": "Orleans County",
    "county_or_equivalent_display": "Orleans County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Orleans County",
    "census_2025_geoid": "36073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Oswego, NY",
    "epa_source_county_label": "Oswego County",
    "county_or_equivalent_display": "Oswego County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Oswego County",
    "census_2025_geoid": "36075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Otsego, NY",
    "epa_source_county_label": "Otsego County",
    "county_or_equivalent_display": "Otsego County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Otsego County",
    "census_2025_geoid": "36077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Putnam, NY",
    "epa_source_county_label": "Putnam County",
    "county_or_equivalent_display": "Putnam County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Putnam County",
    "census_2025_geoid": "36079",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Queens, NY",
    "epa_source_county_label": "Queens County",
    "county_or_equivalent_display": "Queens County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Queens County",
    "census_2025_geoid": "36081",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rensselaer, NY",
    "epa_source_county_label": "Rensselaer County",
    "county_or_equivalent_display": "Rensselaer County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rensselaer County",
    "census_2025_geoid": "36083",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Richmond, NY",
    "epa_source_county_label": "Richmond County",
    "county_or_equivalent_display": "Richmond County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Richmond County",
    "census_2025_geoid": "36085",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rockland, NY",
    "epa_source_county_label": "Rockland County",
    "county_or_equivalent_display": "Rockland County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rockland County",
    "census_2025_geoid": "36087",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Saratoga, NY",
    "epa_source_county_label": "Saratoga County",
    "county_or_equivalent_display": "Saratoga County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Saratoga County",
    "census_2025_geoid": "36091",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Schenectady, NY",
    "epa_source_county_label": "Schenectady County",
    "county_or_equivalent_display": "Schenectady County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Schenectady County",
    "census_2025_geoid": "36093",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Schoharie, NY",
    "epa_source_county_label": "Schoharie County",
    "county_or_equivalent_display": "Schoharie County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Schoharie County",
    "census_2025_geoid": "36095",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Schuyler, NY",
    "epa_source_county_label": "Schuyler County",
    "county_or_equivalent_display": "Schuyler County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Schuyler County",
    "census_2025_geoid": "36097",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Seneca, NY",
    "epa_source_county_label": "Seneca County",
    "county_or_equivalent_display": "Seneca County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Seneca County",
    "census_2025_geoid": "36099",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "St. Lawrence, NY",
    "epa_source_county_label": "St. Lawrence County",
    "county_or_equivalent_display": "St. Lawrence County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "St. Lawrence County",
    "census_2025_geoid": "36089",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Steuben, NY",
    "epa_source_county_label": "Steuben County",
    "county_or_equivalent_display": "Steuben County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Steuben County",
    "census_2025_geoid": "36101",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Suffolk, NY",
    "epa_source_county_label": "Suffolk County",
    "county_or_equivalent_display": "Suffolk County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Suffolk County",
    "census_2025_geoid": "36103",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sullivan, NY",
    "epa_source_county_label": "Sullivan County",
    "county_or_equivalent_display": "Sullivan County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sullivan County",
    "census_2025_geoid": "36105",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tioga, NY",
    "epa_source_county_label": "Tioga County",
    "county_or_equivalent_display": "Tioga County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tioga County",
    "census_2025_geoid": "36107",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tompkins, NY",
    "epa_source_county_label": "Tompkins County",
    "county_or_equivalent_display": "Tompkins County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tompkins County",
    "census_2025_geoid": "36109",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ulster, NY",
    "epa_source_county_label": "Ulster County",
    "county_or_equivalent_display": "Ulster County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ulster County",
    "census_2025_geoid": "36111",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Warren, NY",
    "epa_source_county_label": "Warren County",
    "county_or_equivalent_display": "Warren County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Warren County",
    "census_2025_geoid": "36113",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washington, NY",
    "epa_source_county_label": "Washington County",
    "county_or_equivalent_display": "Washington County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washington County",
    "census_2025_geoid": "36115",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wayne, NY",
    "epa_source_county_label": "Wayne County",
    "county_or_equivalent_display": "Wayne County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wayne County",
    "census_2025_geoid": "36117",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Westchester, NY",
    "epa_source_county_label": "Westchester County",
    "county_or_equivalent_display": "Westchester County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Westchester County",
    "census_2025_geoid": "36119",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wyoming, NY",
    "epa_source_county_label": "Wyoming County",
    "county_or_equivalent_display": "Wyoming County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wyoming County",
    "census_2025_geoid": "36121",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Yates, NY",
    "epa_source_county_label": "Yates County",
    "county_or_equivalent_display": "Yates County",
    "state_name": "New York",
    "state_abbreviation": "NY",
    "geography_type": "county",
    "epa_region_source_value": "2",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Yates County",
    "census_2025_geoid": "36123",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Alamance, NC",
    "epa_source_county_label": "Alamance County",
    "county_or_equivalent_display": "Alamance County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Alamance County",
    "census_2025_geoid": "37001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Alexander, NC",
    "epa_source_county_label": "Alexander County",
    "county_or_equivalent_display": "Alexander County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Alexander County",
    "census_2025_geoid": "37003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Alleghany, NC",
    "epa_source_county_label": "Alleghany County",
    "county_or_equivalent_display": "Alleghany County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Alleghany County",
    "census_2025_geoid": "37005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Anson, NC",
    "epa_source_county_label": "Anson County",
    "county_or_equivalent_display": "Anson County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Anson County",
    "census_2025_geoid": "37007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ashe, NC",
    "epa_source_county_label": "Ashe County",
    "county_or_equivalent_display": "Ashe County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ashe County",
    "census_2025_geoid": "37009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Avery, NC",
    "epa_source_county_label": "Avery County",
    "county_or_equivalent_display": "Avery County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Avery County",
    "census_2025_geoid": "37011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Beaufort, NC",
    "epa_source_county_label": "Beaufort County",
    "county_or_equivalent_display": "Beaufort County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Beaufort County",
    "census_2025_geoid": "37013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bertie, NC",
    "epa_source_county_label": "Bertie County",
    "county_or_equivalent_display": "Bertie County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bertie County",
    "census_2025_geoid": "37015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bladen, NC",
    "epa_source_county_label": "Bladen County",
    "county_or_equivalent_display": "Bladen County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bladen County",
    "census_2025_geoid": "37017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Brunswick, NC",
    "epa_source_county_label": "Brunswick County",
    "county_or_equivalent_display": "Brunswick County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Brunswick County",
    "census_2025_geoid": "37019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Buncombe, NC",
    "epa_source_county_label": "Buncombe County",
    "county_or_equivalent_display": "Buncombe County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Buncombe County",
    "census_2025_geoid": "37021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Burke, NC",
    "epa_source_county_label": "Burke County",
    "county_or_equivalent_display": "Burke County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Burke County",
    "census_2025_geoid": "37023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cabarrus, NC",
    "epa_source_county_label": "Cabarrus County",
    "county_or_equivalent_display": "Cabarrus County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cabarrus County",
    "census_2025_geoid": "37025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Caldwell, NC",
    "epa_source_county_label": "Caldwell County",
    "county_or_equivalent_display": "Caldwell County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Caldwell County",
    "census_2025_geoid": "37027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Camden, NC",
    "epa_source_county_label": "Camden County",
    "county_or_equivalent_display": "Camden County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Camden County",
    "census_2025_geoid": "37029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Carteret, NC",
    "epa_source_county_label": "Carteret County",
    "county_or_equivalent_display": "Carteret County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Carteret County",
    "census_2025_geoid": "37031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Caswell, NC",
    "epa_source_county_label": "Caswell County",
    "county_or_equivalent_display": "Caswell County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Caswell County",
    "census_2025_geoid": "37033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Catawba, NC",
    "epa_source_county_label": "Catawba County",
    "county_or_equivalent_display": "Catawba County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Catawba County",
    "census_2025_geoid": "37035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chatham, NC",
    "epa_source_county_label": "Chatham County",
    "county_or_equivalent_display": "Chatham County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chatham County",
    "census_2025_geoid": "37037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cherokee, NC",
    "epa_source_county_label": "Cherokee County",
    "county_or_equivalent_display": "Cherokee County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cherokee County",
    "census_2025_geoid": "37039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chowan, NC",
    "epa_source_county_label": "Chowan County",
    "county_or_equivalent_display": "Chowan County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chowan County",
    "census_2025_geoid": "37041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clay, NC",
    "epa_source_county_label": "Clay County",
    "county_or_equivalent_display": "Clay County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clay County",
    "census_2025_geoid": "37043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cleveland, NC",
    "epa_source_county_label": "Cleveland County",
    "county_or_equivalent_display": "Cleveland County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cleveland County",
    "census_2025_geoid": "37045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Columbus, NC",
    "epa_source_county_label": "Columbus County",
    "county_or_equivalent_display": "Columbus County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Columbus County",
    "census_2025_geoid": "37047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Craven, NC",
    "epa_source_county_label": "Craven County",
    "county_or_equivalent_display": "Craven County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Craven County",
    "census_2025_geoid": "37049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cumberland, NC",
    "epa_source_county_label": "Cumberland County",
    "county_or_equivalent_display": "Cumberland County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cumberland County",
    "census_2025_geoid": "37051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Currituck, NC",
    "epa_source_county_label": "Currituck County",
    "county_or_equivalent_display": "Currituck County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Currituck County",
    "census_2025_geoid": "37053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dare, NC",
    "epa_source_county_label": "Dare County",
    "county_or_equivalent_display": "Dare County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dare County",
    "census_2025_geoid": "37055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Davidson, NC",
    "epa_source_county_label": "Davidson County",
    "county_or_equivalent_display": "Davidson County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Davidson County",
    "census_2025_geoid": "37057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Davie, NC",
    "epa_source_county_label": "Davie County",
    "county_or_equivalent_display": "Davie County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Davie County",
    "census_2025_geoid": "37059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Duplin, NC",
    "epa_source_county_label": "Duplin County",
    "county_or_equivalent_display": "Duplin County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Duplin County",
    "census_2025_geoid": "37061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Durham, NC",
    "epa_source_county_label": "Durham County",
    "county_or_equivalent_display": "Durham County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Durham County",
    "census_2025_geoid": "37063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Edgecombe, NC",
    "epa_source_county_label": "Edgecombe County",
    "county_or_equivalent_display": "Edgecombe County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Edgecombe County",
    "census_2025_geoid": "37065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Forsyth, NC",
    "epa_source_county_label": "Forsyth County",
    "county_or_equivalent_display": "Forsyth County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Forsyth County",
    "census_2025_geoid": "37067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Franklin, NC",
    "epa_source_county_label": "Franklin County",
    "county_or_equivalent_display": "Franklin County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Franklin County",
    "census_2025_geoid": "37069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gaston, NC",
    "epa_source_county_label": "Gaston County",
    "county_or_equivalent_display": "Gaston County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gaston County",
    "census_2025_geoid": "37071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gates, NC",
    "epa_source_county_label": "Gates County",
    "county_or_equivalent_display": "Gates County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gates County",
    "census_2025_geoid": "37073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Graham, NC",
    "epa_source_county_label": "Graham County",
    "county_or_equivalent_display": "Graham County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Graham County",
    "census_2025_geoid": "37075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Granville, NC",
    "epa_source_county_label": "Granville County",
    "county_or_equivalent_display": "Granville County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Granville County",
    "census_2025_geoid": "37077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Greene, NC",
    "epa_source_county_label": "Greene County",
    "county_or_equivalent_display": "Greene County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Greene County",
    "census_2025_geoid": "37079",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Guilford, NC",
    "epa_source_county_label": "Guilford County",
    "county_or_equivalent_display": "Guilford County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Guilford County",
    "census_2025_geoid": "37081",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Halifax, NC",
    "epa_source_county_label": "Halifax County",
    "county_or_equivalent_display": "Halifax County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Halifax County",
    "census_2025_geoid": "37083",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Harnett, NC",
    "epa_source_county_label": "Harnett County",
    "county_or_equivalent_display": "Harnett County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Harnett County",
    "census_2025_geoid": "37085",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Haywood, NC",
    "epa_source_county_label": "Haywood County",
    "county_or_equivalent_display": "Haywood County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Haywood County",
    "census_2025_geoid": "37087",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Henderson, NC",
    "epa_source_county_label": "Henderson County",
    "county_or_equivalent_display": "Henderson County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Henderson County",
    "census_2025_geoid": "37089",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hertford, NC",
    "epa_source_county_label": "Hertford County",
    "county_or_equivalent_display": "Hertford County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hertford County",
    "census_2025_geoid": "37091",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hoke, NC",
    "epa_source_county_label": "Hoke County",
    "county_or_equivalent_display": "Hoke County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hoke County",
    "census_2025_geoid": "37093",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hyde, NC",
    "epa_source_county_label": "Hyde County",
    "county_or_equivalent_display": "Hyde County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hyde County",
    "census_2025_geoid": "37095",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Iredell, NC",
    "epa_source_county_label": "Iredell County",
    "county_or_equivalent_display": "Iredell County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Iredell County",
    "census_2025_geoid": "37097",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jackson, NC",
    "epa_source_county_label": "Jackson County",
    "county_or_equivalent_display": "Jackson County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jackson County",
    "census_2025_geoid": "37099",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Johnston, NC",
    "epa_source_county_label": "Johnston County",
    "county_or_equivalent_display": "Johnston County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Johnston County",
    "census_2025_geoid": "37101",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jones, NC",
    "epa_source_county_label": "Jones County",
    "county_or_equivalent_display": "Jones County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jones County",
    "census_2025_geoid": "37103",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lee, NC",
    "epa_source_county_label": "Lee County",
    "county_or_equivalent_display": "Lee County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lee County",
    "census_2025_geoid": "37105",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lenoir, NC",
    "epa_source_county_label": "Lenoir County",
    "county_or_equivalent_display": "Lenoir County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lenoir County",
    "census_2025_geoid": "37107",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lincoln, NC",
    "epa_source_county_label": "Lincoln County",
    "county_or_equivalent_display": "Lincoln County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lincoln County",
    "census_2025_geoid": "37109",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Macon, NC",
    "epa_source_county_label": "Macon County",
    "county_or_equivalent_display": "Macon County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Macon County",
    "census_2025_geoid": "37113",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Madison, NC",
    "epa_source_county_label": "Madison County",
    "county_or_equivalent_display": "Madison County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Madison County",
    "census_2025_geoid": "37115",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Martin, NC",
    "epa_source_county_label": "Martin County",
    "county_or_equivalent_display": "Martin County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Martin County",
    "census_2025_geoid": "37117",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "McDowell, NC",
    "epa_source_county_label": "McDowell County",
    "county_or_equivalent_display": "McDowell County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "McDowell County",
    "census_2025_geoid": "37111",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mecklenburg, NC",
    "epa_source_county_label": "Mecklenburg County",
    "county_or_equivalent_display": "Mecklenburg County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mecklenburg County",
    "census_2025_geoid": "37119",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mitchell, NC",
    "epa_source_county_label": "Mitchell County",
    "county_or_equivalent_display": "Mitchell County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mitchell County",
    "census_2025_geoid": "37121",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Montgomery, NC",
    "epa_source_county_label": "Montgomery County",
    "county_or_equivalent_display": "Montgomery County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Montgomery County",
    "census_2025_geoid": "37123",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Moore, NC",
    "epa_source_county_label": "Moore County",
    "county_or_equivalent_display": "Moore County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Moore County",
    "census_2025_geoid": "37125",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Nash, NC",
    "epa_source_county_label": "Nash County",
    "county_or_equivalent_display": "Nash County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Nash County",
    "census_2025_geoid": "37127",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "New Hanover, NC",
    "epa_source_county_label": "New Hanover County",
    "county_or_equivalent_display": "New Hanover County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "New Hanover County",
    "census_2025_geoid": "37129",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Northampton, NC",
    "epa_source_county_label": "Northampton County",
    "county_or_equivalent_display": "Northampton County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Northampton County",
    "census_2025_geoid": "37131",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Onslow, NC",
    "epa_source_county_label": "Onslow County",
    "county_or_equivalent_display": "Onslow County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Onslow County",
    "census_2025_geoid": "37133",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Orange, NC",
    "epa_source_county_label": "Orange County",
    "county_or_equivalent_display": "Orange County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Orange County",
    "census_2025_geoid": "37135",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pamlico, NC",
    "epa_source_county_label": "Pamlico County",
    "county_or_equivalent_display": "Pamlico County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pamlico County",
    "census_2025_geoid": "37137",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pasquotank, NC",
    "epa_source_county_label": "Pasquotank County",
    "county_or_equivalent_display": "Pasquotank County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pasquotank County",
    "census_2025_geoid": "37139",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pender, NC",
    "epa_source_county_label": "Pender County",
    "county_or_equivalent_display": "Pender County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pender County",
    "census_2025_geoid": "37141",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Perquimans, NC",
    "epa_source_county_label": "Perquimans County",
    "county_or_equivalent_display": "Perquimans County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Perquimans County",
    "census_2025_geoid": "37143",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Person, NC",
    "epa_source_county_label": "Person County",
    "county_or_equivalent_display": "Person County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Person County",
    "census_2025_geoid": "37145",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pitt, NC",
    "epa_source_county_label": "Pitt County",
    "county_or_equivalent_display": "Pitt County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pitt County",
    "census_2025_geoid": "37147",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Polk, NC",
    "epa_source_county_label": "Polk County",
    "county_or_equivalent_display": "Polk County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Polk County",
    "census_2025_geoid": "37149",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Randolph, NC",
    "epa_source_county_label": "Randolph County",
    "county_or_equivalent_display": "Randolph County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Randolph County",
    "census_2025_geoid": "37151",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Richmond, NC",
    "epa_source_county_label": "Richmond County",
    "county_or_equivalent_display": "Richmond County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Richmond County",
    "census_2025_geoid": "37153",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Robeson, NC",
    "epa_source_county_label": "Robeson County",
    "county_or_equivalent_display": "Robeson County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Robeson County",
    "census_2025_geoid": "37155",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rockingham, NC",
    "epa_source_county_label": "Rockingham County",
    "county_or_equivalent_display": "Rockingham County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rockingham County",
    "census_2025_geoid": "37157",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rowan, NC",
    "epa_source_county_label": "Rowan County",
    "county_or_equivalent_display": "Rowan County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rowan County",
    "census_2025_geoid": "37159",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rutherford, NC",
    "epa_source_county_label": "Rutherford County",
    "county_or_equivalent_display": "Rutherford County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rutherford County",
    "census_2025_geoid": "37161",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sampson, NC",
    "epa_source_county_label": "Sampson County",
    "county_or_equivalent_display": "Sampson County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sampson County",
    "census_2025_geoid": "37163",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Scotland, NC",
    "epa_source_county_label": "Scotland County",
    "county_or_equivalent_display": "Scotland County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Scotland County",
    "census_2025_geoid": "37165",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Stanly, NC",
    "epa_source_county_label": "Stanly County",
    "county_or_equivalent_display": "Stanly County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Stanly County",
    "census_2025_geoid": "37167",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Stokes, NC",
    "epa_source_county_label": "Stokes County",
    "county_or_equivalent_display": "Stokes County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Stokes County",
    "census_2025_geoid": "37169",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Surry, NC",
    "epa_source_county_label": "Surry County",
    "county_or_equivalent_display": "Surry County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Surry County",
    "census_2025_geoid": "37171",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Swain, NC",
    "epa_source_county_label": "Swain County",
    "county_or_equivalent_display": "Swain County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Swain County",
    "census_2025_geoid": "37173",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Transylvania, NC",
    "epa_source_county_label": "Transylvania County",
    "county_or_equivalent_display": "Transylvania County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Transylvania County",
    "census_2025_geoid": "37175",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tyrrell, NC",
    "epa_source_county_label": "Tyrrell County",
    "county_or_equivalent_display": "Tyrrell County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tyrrell County",
    "census_2025_geoid": "37177",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Union, NC",
    "epa_source_county_label": "Union County",
    "county_or_equivalent_display": "Union County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Union County",
    "census_2025_geoid": "37179",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Vance, NC",
    "epa_source_county_label": "Vance County",
    "county_or_equivalent_display": "Vance County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Vance County",
    "census_2025_geoid": "37181",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wake, NC",
    "epa_source_county_label": "Wake County",
    "county_or_equivalent_display": "Wake County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wake County",
    "census_2025_geoid": "37183",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Warren, NC",
    "epa_source_county_label": "Warren County",
    "county_or_equivalent_display": "Warren County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Warren County",
    "census_2025_geoid": "37185",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washington, NC",
    "epa_source_county_label": "Washington County",
    "county_or_equivalent_display": "Washington County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washington County",
    "census_2025_geoid": "37187",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Watauga, NC",
    "epa_source_county_label": "Watauga County",
    "county_or_equivalent_display": "Watauga County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Watauga County",
    "census_2025_geoid": "37189",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wayne, NC",
    "epa_source_county_label": "Wayne County",
    "county_or_equivalent_display": "Wayne County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wayne County",
    "census_2025_geoid": "37191",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wilkes, NC",
    "epa_source_county_label": "Wilkes County",
    "county_or_equivalent_display": "Wilkes County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wilkes County",
    "census_2025_geoid": "37193",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wilson, NC",
    "epa_source_county_label": "Wilson County",
    "county_or_equivalent_display": "Wilson County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wilson County",
    "census_2025_geoid": "37195",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Yadkin, NC",
    "epa_source_county_label": "Yadkin County",
    "county_or_equivalent_display": "Yadkin County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Yadkin County",
    "census_2025_geoid": "37197",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Yancey, NC",
    "epa_source_county_label": "Yancey County",
    "county_or_equivalent_display": "Yancey County",
    "state_name": "North Carolina",
    "state_abbreviation": "NC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Yancey County",
    "census_2025_geoid": "37199",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Adams, ND",
    "epa_source_county_label": "Adams County",
    "county_or_equivalent_display": "Adams County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Adams County",
    "census_2025_geoid": "38001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Barnes, ND",
    "epa_source_county_label": "Barnes County",
    "county_or_equivalent_display": "Barnes County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Barnes County",
    "census_2025_geoid": "38003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Benson, ND",
    "epa_source_county_label": "Benson County",
    "county_or_equivalent_display": "Benson County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Benson County",
    "census_2025_geoid": "38005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Billings, ND",
    "epa_source_county_label": "Billings County",
    "county_or_equivalent_display": "Billings County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Billings County",
    "census_2025_geoid": "38007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bottineau, ND",
    "epa_source_county_label": "Bottineau County",
    "county_or_equivalent_display": "Bottineau County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bottineau County",
    "census_2025_geoid": "38009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bowman, ND",
    "epa_source_county_label": "Bowman County",
    "county_or_equivalent_display": "Bowman County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bowman County",
    "census_2025_geoid": "38011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Burke, ND",
    "epa_source_county_label": "Burke County",
    "county_or_equivalent_display": "Burke County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Burke County",
    "census_2025_geoid": "38013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Burleigh, ND",
    "epa_source_county_label": "Burleigh County",
    "county_or_equivalent_display": "Burleigh County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Burleigh County",
    "census_2025_geoid": "38015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cass, ND",
    "epa_source_county_label": "Cass County",
    "county_or_equivalent_display": "Cass County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cass County",
    "census_2025_geoid": "38017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cavalier, ND",
    "epa_source_county_label": "Cavalier County",
    "county_or_equivalent_display": "Cavalier County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cavalier County",
    "census_2025_geoid": "38019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dickey, ND",
    "epa_source_county_label": "Dickey County",
    "county_or_equivalent_display": "Dickey County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dickey County",
    "census_2025_geoid": "38021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Divide, ND",
    "epa_source_county_label": "Divide County",
    "county_or_equivalent_display": "Divide County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Divide County",
    "census_2025_geoid": "38023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dunn, ND",
    "epa_source_county_label": "Dunn County",
    "county_or_equivalent_display": "Dunn County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dunn County",
    "census_2025_geoid": "38025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Eddy, ND",
    "epa_source_county_label": "Eddy County",
    "county_or_equivalent_display": "Eddy County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Eddy County",
    "census_2025_geoid": "38027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Emmons, ND",
    "epa_source_county_label": "Emmons County",
    "county_or_equivalent_display": "Emmons County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Emmons County",
    "census_2025_geoid": "38029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Foster, ND",
    "epa_source_county_label": "Foster County",
    "county_or_equivalent_display": "Foster County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Foster County",
    "census_2025_geoid": "38031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Golden Valley, ND",
    "epa_source_county_label": "Golden Valley County",
    "county_or_equivalent_display": "Golden Valley County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Golden Valley County",
    "census_2025_geoid": "38033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grand Forks, ND",
    "epa_source_county_label": "Grand Forks County",
    "county_or_equivalent_display": "Grand Forks County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grand Forks County",
    "census_2025_geoid": "38035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grant, ND",
    "epa_source_county_label": "Grant County",
    "county_or_equivalent_display": "Grant County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grant County",
    "census_2025_geoid": "38037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Griggs, ND",
    "epa_source_county_label": "Griggs County",
    "county_or_equivalent_display": "Griggs County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Griggs County",
    "census_2025_geoid": "38039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hettinger, ND",
    "epa_source_county_label": "Hettinger County",
    "county_or_equivalent_display": "Hettinger County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hettinger County",
    "census_2025_geoid": "38041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kidder, ND",
    "epa_source_county_label": "Kidder County",
    "county_or_equivalent_display": "Kidder County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kidder County",
    "census_2025_geoid": "38043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "La Moure, ND",
    "epa_source_county_label": "LaMoure County",
    "county_or_equivalent_display": "LaMoure County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "LaMoure County",
    "census_2025_geoid": "38045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Logan, ND",
    "epa_source_county_label": "Logan County",
    "county_or_equivalent_display": "Logan County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Logan County",
    "census_2025_geoid": "38047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "McHenry, ND",
    "epa_source_county_label": "McHenry County",
    "county_or_equivalent_display": "McHenry County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "McHenry County",
    "census_2025_geoid": "38049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "McIntosh, ND",
    "epa_source_county_label": "McIntosh County",
    "county_or_equivalent_display": "McIntosh County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "McIntosh County",
    "census_2025_geoid": "38051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "McKenzie, ND",
    "epa_source_county_label": "McKenzie County",
    "county_or_equivalent_display": "McKenzie County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "McKenzie County",
    "census_2025_geoid": "38053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "McLean, ND",
    "epa_source_county_label": "McLean County",
    "county_or_equivalent_display": "McLean County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "McLean County",
    "census_2025_geoid": "38055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mercer, ND",
    "epa_source_county_label": "Mercer County",
    "county_or_equivalent_display": "Mercer County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mercer County",
    "census_2025_geoid": "38057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Morton, ND",
    "epa_source_county_label": "Morton County",
    "county_or_equivalent_display": "Morton County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Morton County",
    "census_2025_geoid": "38059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mountrail, ND",
    "epa_source_county_label": "Mountrail County",
    "county_or_equivalent_display": "Mountrail County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mountrail County",
    "census_2025_geoid": "38061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Nelson, ND",
    "epa_source_county_label": "Nelson County",
    "county_or_equivalent_display": "Nelson County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Nelson County",
    "census_2025_geoid": "38063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Oliver, ND",
    "epa_source_county_label": "Oliver County",
    "county_or_equivalent_display": "Oliver County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Oliver County",
    "census_2025_geoid": "38065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pembina, ND",
    "epa_source_county_label": "Pembina County",
    "county_or_equivalent_display": "Pembina County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pembina County",
    "census_2025_geoid": "38067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pierce, ND",
    "epa_source_county_label": "Pierce County",
    "county_or_equivalent_display": "Pierce County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pierce County",
    "census_2025_geoid": "38069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ramsey, ND",
    "epa_source_county_label": "Ramsey County",
    "county_or_equivalent_display": "Ramsey County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ramsey County",
    "census_2025_geoid": "38071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ransom, ND",
    "epa_source_county_label": "Ransom County",
    "county_or_equivalent_display": "Ransom County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ransom County",
    "census_2025_geoid": "38073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Renville, ND",
    "epa_source_county_label": "Renville County",
    "county_or_equivalent_display": "Renville County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Renville County",
    "census_2025_geoid": "38075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Richland, ND",
    "epa_source_county_label": "Richland County",
    "county_or_equivalent_display": "Richland County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Richland County",
    "census_2025_geoid": "38077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rolette, ND",
    "epa_source_county_label": "Rolette County",
    "county_or_equivalent_display": "Rolette County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rolette County",
    "census_2025_geoid": "38079",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sargent, ND",
    "epa_source_county_label": "Sargent County",
    "county_or_equivalent_display": "Sargent County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sargent County",
    "census_2025_geoid": "38081",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sheridan, ND",
    "epa_source_county_label": "Sheridan County",
    "county_or_equivalent_display": "Sheridan County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sheridan County",
    "census_2025_geoid": "38083",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sioux, ND",
    "epa_source_county_label": "Sioux County",
    "county_or_equivalent_display": "Sioux County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sioux County",
    "census_2025_geoid": "38085",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Slope, ND",
    "epa_source_county_label": "Slope County",
    "county_or_equivalent_display": "Slope County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Slope County",
    "census_2025_geoid": "38087",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Stark, ND",
    "epa_source_county_label": "Stark County",
    "county_or_equivalent_display": "Stark County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Stark County",
    "census_2025_geoid": "38089",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Steele, ND",
    "epa_source_county_label": "Steele County",
    "county_or_equivalent_display": "Steele County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Steele County",
    "census_2025_geoid": "38091",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Stutsman, ND",
    "epa_source_county_label": "Stutsman County",
    "county_or_equivalent_display": "Stutsman County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Stutsman County",
    "census_2025_geoid": "38093",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Towner, ND",
    "epa_source_county_label": "Towner County",
    "county_or_equivalent_display": "Towner County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Towner County",
    "census_2025_geoid": "38095",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Traill, ND",
    "epa_source_county_label": "Traill County",
    "county_or_equivalent_display": "Traill County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Traill County",
    "census_2025_geoid": "38097",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Walsh, ND",
    "epa_source_county_label": "Walsh County",
    "county_or_equivalent_display": "Walsh County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Walsh County",
    "census_2025_geoid": "38099",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ward, ND",
    "epa_source_county_label": "Ward County",
    "county_or_equivalent_display": "Ward County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ward County",
    "census_2025_geoid": "38101",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wells, ND",
    "epa_source_county_label": "Wells County",
    "county_or_equivalent_display": "Wells County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wells County",
    "census_2025_geoid": "38103",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Williams, ND",
    "epa_source_county_label": "Williams County",
    "county_or_equivalent_display": "Williams County",
    "state_name": "North Dakota",
    "state_abbreviation": "ND",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Williams County",
    "census_2025_geoid": "38105",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Adams, OH",
    "epa_source_county_label": "Adams County",
    "county_or_equivalent_display": "Adams County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Adams County",
    "census_2025_geoid": "39001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Allen, OH",
    "epa_source_county_label": "Allen County",
    "county_or_equivalent_display": "Allen County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Allen County",
    "census_2025_geoid": "39003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ashland, OH",
    "epa_source_county_label": "Ashland County",
    "county_or_equivalent_display": "Ashland County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ashland County",
    "census_2025_geoid": "39005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ashtabula, OH",
    "epa_source_county_label": "Ashtabula County",
    "county_or_equivalent_display": "Ashtabula County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ashtabula County",
    "census_2025_geoid": "39007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Athens, OH",
    "epa_source_county_label": "Athens County",
    "county_or_equivalent_display": "Athens County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Athens County",
    "census_2025_geoid": "39009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Auglaize, OH",
    "epa_source_county_label": "Auglaize County",
    "county_or_equivalent_display": "Auglaize County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Auglaize County",
    "census_2025_geoid": "39011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Belmont, OH",
    "epa_source_county_label": "Belmont County",
    "county_or_equivalent_display": "Belmont County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Belmont County",
    "census_2025_geoid": "39013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Brown, OH",
    "epa_source_county_label": "Brown County",
    "county_or_equivalent_display": "Brown County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Brown County",
    "census_2025_geoid": "39015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Butler, OH",
    "epa_source_county_label": "Butler County",
    "county_or_equivalent_display": "Butler County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Butler County",
    "census_2025_geoid": "39017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Carroll, OH",
    "epa_source_county_label": "Carroll County",
    "county_or_equivalent_display": "Carroll County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Carroll County",
    "census_2025_geoid": "39019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Champaign, OH",
    "epa_source_county_label": "Champaign County",
    "county_or_equivalent_display": "Champaign County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Champaign County",
    "census_2025_geoid": "39021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clark, OH",
    "epa_source_county_label": "Clark County",
    "county_or_equivalent_display": "Clark County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clark County",
    "census_2025_geoid": "39023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clermont, OH",
    "epa_source_county_label": "Clermont County",
    "county_or_equivalent_display": "Clermont County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clermont County",
    "census_2025_geoid": "39025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clinton, OH",
    "epa_source_county_label": "Clinton County",
    "county_or_equivalent_display": "Clinton County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clinton County",
    "census_2025_geoid": "39027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Columbiana, OH",
    "epa_source_county_label": "Columbiana County",
    "county_or_equivalent_display": "Columbiana County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Columbiana County",
    "census_2025_geoid": "39029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Coshocton, OH",
    "epa_source_county_label": "Coshocton County",
    "county_or_equivalent_display": "Coshocton County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Coshocton County",
    "census_2025_geoid": "39031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Crawford, OH",
    "epa_source_county_label": "Crawford County",
    "county_or_equivalent_display": "Crawford County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Crawford County",
    "census_2025_geoid": "39033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cuyahoga, OH",
    "epa_source_county_label": "Cuyahoga County",
    "county_or_equivalent_display": "Cuyahoga County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cuyahoga County",
    "census_2025_geoid": "39035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Darke, OH",
    "epa_source_county_label": "Darke County",
    "county_or_equivalent_display": "Darke County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Darke County",
    "census_2025_geoid": "39037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Defiance, OH",
    "epa_source_county_label": "Defiance County",
    "county_or_equivalent_display": "Defiance County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Defiance County",
    "census_2025_geoid": "39039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Delaware, OH",
    "epa_source_county_label": "Delaware County",
    "county_or_equivalent_display": "Delaware County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Delaware County",
    "census_2025_geoid": "39041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Erie, OH",
    "epa_source_county_label": "Erie County",
    "county_or_equivalent_display": "Erie County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Erie County",
    "census_2025_geoid": "39043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fairfield, OH",
    "epa_source_county_label": "Fairfield County",
    "county_or_equivalent_display": "Fairfield County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fairfield County",
    "census_2025_geoid": "39045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fayette, OH",
    "epa_source_county_label": "Fayette County",
    "county_or_equivalent_display": "Fayette County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fayette County",
    "census_2025_geoid": "39047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Franklin, OH",
    "epa_source_county_label": "Franklin County",
    "county_or_equivalent_display": "Franklin County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Franklin County",
    "census_2025_geoid": "39049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fulton, OH",
    "epa_source_county_label": "Fulton County",
    "county_or_equivalent_display": "Fulton County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fulton County",
    "census_2025_geoid": "39051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gallia, OH",
    "epa_source_county_label": "Gallia County",
    "county_or_equivalent_display": "Gallia County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gallia County",
    "census_2025_geoid": "39053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Geauga, OH",
    "epa_source_county_label": "Geauga County",
    "county_or_equivalent_display": "Geauga County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Geauga County",
    "census_2025_geoid": "39055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Greene, OH",
    "epa_source_county_label": "Greene County",
    "county_or_equivalent_display": "Greene County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Greene County",
    "census_2025_geoid": "39057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Guernsey, OH",
    "epa_source_county_label": "Guernsey County",
    "county_or_equivalent_display": "Guernsey County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Guernsey County",
    "census_2025_geoid": "39059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hamilton, OH",
    "epa_source_county_label": "Hamilton County",
    "county_or_equivalent_display": "Hamilton County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hamilton County",
    "census_2025_geoid": "39061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hancock, OH",
    "epa_source_county_label": "Hancock County",
    "county_or_equivalent_display": "Hancock County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hancock County",
    "census_2025_geoid": "39063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hardin, OH",
    "epa_source_county_label": "Hardin County",
    "county_or_equivalent_display": "Hardin County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hardin County",
    "census_2025_geoid": "39065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Harrison, OH",
    "epa_source_county_label": "Harrison County",
    "county_or_equivalent_display": "Harrison County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Harrison County",
    "census_2025_geoid": "39067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Henry, OH",
    "epa_source_county_label": "Henry County",
    "county_or_equivalent_display": "Henry County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Henry County",
    "census_2025_geoid": "39069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Highland, OH",
    "epa_source_county_label": "Highland County",
    "county_or_equivalent_display": "Highland County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Highland County",
    "census_2025_geoid": "39071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hocking, OH",
    "epa_source_county_label": "Hocking County",
    "county_or_equivalent_display": "Hocking County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hocking County",
    "census_2025_geoid": "39073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Holmes, OH",
    "epa_source_county_label": "Holmes County",
    "county_or_equivalent_display": "Holmes County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Holmes County",
    "census_2025_geoid": "39075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Huron, OH",
    "epa_source_county_label": "Huron County",
    "county_or_equivalent_display": "Huron County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Huron County",
    "census_2025_geoid": "39077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jackson, OH",
    "epa_source_county_label": "Jackson County",
    "county_or_equivalent_display": "Jackson County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jackson County",
    "census_2025_geoid": "39079",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jefferson, OH",
    "epa_source_county_label": "Jefferson County",
    "county_or_equivalent_display": "Jefferson County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jefferson County",
    "census_2025_geoid": "39081",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Knox, OH",
    "epa_source_county_label": "Knox County",
    "county_or_equivalent_display": "Knox County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Knox County",
    "census_2025_geoid": "39083",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lake, OH",
    "epa_source_county_label": "Lake County",
    "county_or_equivalent_display": "Lake County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lake County",
    "census_2025_geoid": "39085",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lawrence, OH",
    "epa_source_county_label": "Lawrence County",
    "county_or_equivalent_display": "Lawrence County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lawrence County",
    "census_2025_geoid": "39087",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Licking, OH",
    "epa_source_county_label": "Licking County",
    "county_or_equivalent_display": "Licking County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Licking County",
    "census_2025_geoid": "39089",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Logan, OH",
    "epa_source_county_label": "Logan County",
    "county_or_equivalent_display": "Logan County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Logan County",
    "census_2025_geoid": "39091",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lorain, OH",
    "epa_source_county_label": "Lorain County",
    "county_or_equivalent_display": "Lorain County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lorain County",
    "census_2025_geoid": "39093",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lucas, OH",
    "epa_source_county_label": "Lucas County",
    "county_or_equivalent_display": "Lucas County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lucas County",
    "census_2025_geoid": "39095",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Madison, OH",
    "epa_source_county_label": "Madison County",
    "county_or_equivalent_display": "Madison County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Madison County",
    "census_2025_geoid": "39097",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mahoning, OH",
    "epa_source_county_label": "Mahoning County",
    "county_or_equivalent_display": "Mahoning County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mahoning County",
    "census_2025_geoid": "39099",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marion, OH",
    "epa_source_county_label": "Marion County",
    "county_or_equivalent_display": "Marion County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marion County",
    "census_2025_geoid": "39101",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Medina, OH",
    "epa_source_county_label": "Medina County",
    "county_or_equivalent_display": "Medina County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Medina County",
    "census_2025_geoid": "39103",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Meigs, OH",
    "epa_source_county_label": "Meigs County",
    "county_or_equivalent_display": "Meigs County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Meigs County",
    "census_2025_geoid": "39105",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mercer, OH",
    "epa_source_county_label": "Mercer County",
    "county_or_equivalent_display": "Mercer County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mercer County",
    "census_2025_geoid": "39107",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Miami, OH",
    "epa_source_county_label": "Miami County",
    "county_or_equivalent_display": "Miami County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Miami County",
    "census_2025_geoid": "39109",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Monroe, OH",
    "epa_source_county_label": "Monroe County",
    "county_or_equivalent_display": "Monroe County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Monroe County",
    "census_2025_geoid": "39111",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Montgomery, OH",
    "epa_source_county_label": "Montgomery County",
    "county_or_equivalent_display": "Montgomery County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Montgomery County",
    "census_2025_geoid": "39113",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Morgan, OH",
    "epa_source_county_label": "Morgan County",
    "county_or_equivalent_display": "Morgan County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Morgan County",
    "census_2025_geoid": "39115",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Morrow, OH",
    "epa_source_county_label": "Morrow County",
    "county_or_equivalent_display": "Morrow County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Morrow County",
    "census_2025_geoid": "39117",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Muskingum, OH",
    "epa_source_county_label": "Muskingum County",
    "county_or_equivalent_display": "Muskingum County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Muskingum County",
    "census_2025_geoid": "39119",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Noble, OH",
    "epa_source_county_label": "Noble County",
    "county_or_equivalent_display": "Noble County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Noble County",
    "census_2025_geoid": "39121",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ottawa, OH",
    "epa_source_county_label": "Ottawa County",
    "county_or_equivalent_display": "Ottawa County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ottawa County",
    "census_2025_geoid": "39123",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Paulding, OH",
    "epa_source_county_label": "Paulding County",
    "county_or_equivalent_display": "Paulding County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Paulding County",
    "census_2025_geoid": "39125",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Perry, OH",
    "epa_source_county_label": "Perry County",
    "county_or_equivalent_display": "Perry County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Perry County",
    "census_2025_geoid": "39127",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pickaway, OH",
    "epa_source_county_label": "Pickaway County",
    "county_or_equivalent_display": "Pickaway County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pickaway County",
    "census_2025_geoid": "39129",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pike, OH",
    "epa_source_county_label": "Pike County",
    "county_or_equivalent_display": "Pike County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pike County",
    "census_2025_geoid": "39131",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Portage, OH",
    "epa_source_county_label": "Portage County",
    "county_or_equivalent_display": "Portage County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Portage County",
    "census_2025_geoid": "39133",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Preble, OH",
    "epa_source_county_label": "Preble County",
    "county_or_equivalent_display": "Preble County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Preble County",
    "census_2025_geoid": "39135",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Putnam, OH",
    "epa_source_county_label": "Putnam County",
    "county_or_equivalent_display": "Putnam County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Putnam County",
    "census_2025_geoid": "39137",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Richland, OH",
    "epa_source_county_label": "Richland County",
    "county_or_equivalent_display": "Richland County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Richland County",
    "census_2025_geoid": "39139",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ross, OH",
    "epa_source_county_label": "Ross County",
    "county_or_equivalent_display": "Ross County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ross County",
    "census_2025_geoid": "39141",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sandusky, OH",
    "epa_source_county_label": "Sandusky County",
    "county_or_equivalent_display": "Sandusky County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sandusky County",
    "census_2025_geoid": "39143",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Scioto, OH",
    "epa_source_county_label": "Scioto County",
    "county_or_equivalent_display": "Scioto County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Scioto County",
    "census_2025_geoid": "39145",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Seneca, OH",
    "epa_source_county_label": "Seneca County",
    "county_or_equivalent_display": "Seneca County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Seneca County",
    "census_2025_geoid": "39147",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Shelby, OH",
    "epa_source_county_label": "Shelby County",
    "county_or_equivalent_display": "Shelby County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Shelby County",
    "census_2025_geoid": "39149",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Stark, OH",
    "epa_source_county_label": "Stark County",
    "county_or_equivalent_display": "Stark County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Stark County",
    "census_2025_geoid": "39151",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Summit, OH",
    "epa_source_county_label": "Summit County",
    "county_or_equivalent_display": "Summit County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Summit County",
    "census_2025_geoid": "39153",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Trumbull, OH",
    "epa_source_county_label": "Trumbull County",
    "county_or_equivalent_display": "Trumbull County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Trumbull County",
    "census_2025_geoid": "39155",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tuscarawas, OH",
    "epa_source_county_label": "Tuscarawas County",
    "county_or_equivalent_display": "Tuscarawas County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tuscarawas County",
    "census_2025_geoid": "39157",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Union, OH",
    "epa_source_county_label": "Union County",
    "county_or_equivalent_display": "Union County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Union County",
    "census_2025_geoid": "39159",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Van Wert, OH",
    "epa_source_county_label": "Van Wert County",
    "county_or_equivalent_display": "Van Wert County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Van Wert County",
    "census_2025_geoid": "39161",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Vinton, OH",
    "epa_source_county_label": "Vinton County",
    "county_or_equivalent_display": "Vinton County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Vinton County",
    "census_2025_geoid": "39163",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Warren, OH",
    "epa_source_county_label": "Warren County",
    "county_or_equivalent_display": "Warren County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Warren County",
    "census_2025_geoid": "39165",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washington, OH",
    "epa_source_county_label": "Washington County",
    "county_or_equivalent_display": "Washington County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washington County",
    "census_2025_geoid": "39167",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wayne, OH",
    "epa_source_county_label": "Wayne County",
    "county_or_equivalent_display": "Wayne County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wayne County",
    "census_2025_geoid": "39169",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Williams, OH",
    "epa_source_county_label": "Williams County",
    "county_or_equivalent_display": "Williams County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Williams County",
    "census_2025_geoid": "39171",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wood, OH",
    "epa_source_county_label": "Wood County",
    "county_or_equivalent_display": "Wood County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wood County",
    "census_2025_geoid": "39173",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wyandot, OH",
    "epa_source_county_label": "Wyandot County",
    "county_or_equivalent_display": "Wyandot County",
    "state_name": "Ohio",
    "state_abbreviation": "OH",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wyandot County",
    "census_2025_geoid": "39175",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Adair, OK",
    "epa_source_county_label": "Adair County",
    "county_or_equivalent_display": "Adair County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Adair County",
    "census_2025_geoid": "40001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Alfalfa, OK",
    "epa_source_county_label": "Alfalfa County",
    "county_or_equivalent_display": "Alfalfa County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Alfalfa County",
    "census_2025_geoid": "40003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Atoka, OK",
    "epa_source_county_label": "Atoka County",
    "county_or_equivalent_display": "Atoka County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Atoka County",
    "census_2025_geoid": "40005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Beaver, OK",
    "epa_source_county_label": "Beaver County",
    "county_or_equivalent_display": "Beaver County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Beaver County",
    "census_2025_geoid": "40007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Beckham, OK",
    "epa_source_county_label": "Beckham County",
    "county_or_equivalent_display": "Beckham County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Beckham County",
    "census_2025_geoid": "40009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Blaine, OK",
    "epa_source_county_label": "Blaine County",
    "county_or_equivalent_display": "Blaine County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Blaine County",
    "census_2025_geoid": "40011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bryan, OK",
    "epa_source_county_label": "Bryan County",
    "county_or_equivalent_display": "Bryan County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bryan County",
    "census_2025_geoid": "40013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Caddo, OK",
    "epa_source_county_label": "Caddo County",
    "county_or_equivalent_display": "Caddo County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Caddo County",
    "census_2025_geoid": "40015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Canadian, OK",
    "epa_source_county_label": "Canadian County",
    "county_or_equivalent_display": "Canadian County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Canadian County",
    "census_2025_geoid": "40017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Carter, OK",
    "epa_source_county_label": "Carter County",
    "county_or_equivalent_display": "Carter County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Carter County",
    "census_2025_geoid": "40019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cherokee, OK",
    "epa_source_county_label": "Cherokee County",
    "county_or_equivalent_display": "Cherokee County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cherokee County",
    "census_2025_geoid": "40021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Choctaw, OK",
    "epa_source_county_label": "Choctaw County",
    "county_or_equivalent_display": "Choctaw County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Choctaw County",
    "census_2025_geoid": "40023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cimarron, OK",
    "epa_source_county_label": "Cimarron County",
    "county_or_equivalent_display": "Cimarron County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cimarron County",
    "census_2025_geoid": "40025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cleveland, OK",
    "epa_source_county_label": "Cleveland County",
    "county_or_equivalent_display": "Cleveland County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cleveland County",
    "census_2025_geoid": "40027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Coal, OK",
    "epa_source_county_label": "Coal County",
    "county_or_equivalent_display": "Coal County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Coal County",
    "census_2025_geoid": "40029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Comanche, OK",
    "epa_source_county_label": "Comanche County",
    "county_or_equivalent_display": "Comanche County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Comanche County",
    "census_2025_geoid": "40031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cotton, OK",
    "epa_source_county_label": "Cotton County",
    "county_or_equivalent_display": "Cotton County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cotton County",
    "census_2025_geoid": "40033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Craig, OK",
    "epa_source_county_label": "Craig County",
    "county_or_equivalent_display": "Craig County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Craig County",
    "census_2025_geoid": "40035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Creek, OK",
    "epa_source_county_label": "Creek County",
    "county_or_equivalent_display": "Creek County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Creek County",
    "census_2025_geoid": "40037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Custer, OK",
    "epa_source_county_label": "Custer County",
    "county_or_equivalent_display": "Custer County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Custer County",
    "census_2025_geoid": "40039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Delaware, OK",
    "epa_source_county_label": "Delaware County",
    "county_or_equivalent_display": "Delaware County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Delaware County",
    "census_2025_geoid": "40041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dewey, OK",
    "epa_source_county_label": "Dewey County",
    "county_or_equivalent_display": "Dewey County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dewey County",
    "census_2025_geoid": "40043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ellis, OK",
    "epa_source_county_label": "Ellis County",
    "county_or_equivalent_display": "Ellis County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ellis County",
    "census_2025_geoid": "40045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Garfield, OK",
    "epa_source_county_label": "Garfield County",
    "county_or_equivalent_display": "Garfield County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Garfield County",
    "census_2025_geoid": "40047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Garvin, OK",
    "epa_source_county_label": "Garvin County",
    "county_or_equivalent_display": "Garvin County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Garvin County",
    "census_2025_geoid": "40049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grady, OK",
    "epa_source_county_label": "Grady County",
    "county_or_equivalent_display": "Grady County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grady County",
    "census_2025_geoid": "40051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grant, OK",
    "epa_source_county_label": "Grant County",
    "county_or_equivalent_display": "Grant County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grant County",
    "census_2025_geoid": "40053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Greer, OK",
    "epa_source_county_label": "Greer County",
    "county_or_equivalent_display": "Greer County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Greer County",
    "census_2025_geoid": "40055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Harmon, OK",
    "epa_source_county_label": "Harmon County",
    "county_or_equivalent_display": "Harmon County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Harmon County",
    "census_2025_geoid": "40057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Harper, OK",
    "epa_source_county_label": "Harper County",
    "county_or_equivalent_display": "Harper County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Harper County",
    "census_2025_geoid": "40059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Haskell, OK",
    "epa_source_county_label": "Haskell County",
    "county_or_equivalent_display": "Haskell County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Haskell County",
    "census_2025_geoid": "40061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hughes, OK",
    "epa_source_county_label": "Hughes County",
    "county_or_equivalent_display": "Hughes County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hughes County",
    "census_2025_geoid": "40063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jackson, OK",
    "epa_source_county_label": "Jackson County",
    "county_or_equivalent_display": "Jackson County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jackson County",
    "census_2025_geoid": "40065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jefferson, OK",
    "epa_source_county_label": "Jefferson County",
    "county_or_equivalent_display": "Jefferson County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jefferson County",
    "census_2025_geoid": "40067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Johnston, OK",
    "epa_source_county_label": "Johnston County",
    "county_or_equivalent_display": "Johnston County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Johnston County",
    "census_2025_geoid": "40069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kay, OK",
    "epa_source_county_label": "Kay County",
    "county_or_equivalent_display": "Kay County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kay County",
    "census_2025_geoid": "40071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kingfisher, OK",
    "epa_source_county_label": "Kingfisher County",
    "county_or_equivalent_display": "Kingfisher County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kingfisher County",
    "census_2025_geoid": "40073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kiowa, OK",
    "epa_source_county_label": "Kiowa County",
    "county_or_equivalent_display": "Kiowa County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kiowa County",
    "census_2025_geoid": "40075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Latimer, OK",
    "epa_source_county_label": "Latimer County",
    "county_or_equivalent_display": "Latimer County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Latimer County",
    "census_2025_geoid": "40077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Le Flore, OK",
    "epa_source_county_label": "Le Flore County",
    "county_or_equivalent_display": "Le Flore County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Le Flore County",
    "census_2025_geoid": "40079",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lincoln, OK",
    "epa_source_county_label": "Lincoln County",
    "county_or_equivalent_display": "Lincoln County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lincoln County",
    "census_2025_geoid": "40081",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Logan, OK",
    "epa_source_county_label": "Logan County",
    "county_or_equivalent_display": "Logan County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Logan County",
    "census_2025_geoid": "40083",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Love, OK",
    "epa_source_county_label": "Love County",
    "county_or_equivalent_display": "Love County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Love County",
    "census_2025_geoid": "40085",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Major, OK",
    "epa_source_county_label": "Major County",
    "county_or_equivalent_display": "Major County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Major County",
    "census_2025_geoid": "40093",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marshall, OK",
    "epa_source_county_label": "Marshall County",
    "county_or_equivalent_display": "Marshall County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marshall County",
    "census_2025_geoid": "40095",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mayes, OK",
    "epa_source_county_label": "Mayes County",
    "county_or_equivalent_display": "Mayes County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mayes County",
    "census_2025_geoid": "40097",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "McClain, OK",
    "epa_source_county_label": "McClain County",
    "county_or_equivalent_display": "McClain County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "McClain County",
    "census_2025_geoid": "40087",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "McCurtain, OK",
    "epa_source_county_label": "McCurtain County",
    "county_or_equivalent_display": "McCurtain County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "McCurtain County",
    "census_2025_geoid": "40089",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "McIntosh, OK",
    "epa_source_county_label": "McIntosh County",
    "county_or_equivalent_display": "McIntosh County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "McIntosh County",
    "census_2025_geoid": "40091",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Murray, OK",
    "epa_source_county_label": "Murray County",
    "county_or_equivalent_display": "Murray County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Murray County",
    "census_2025_geoid": "40099",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Muskogee, OK",
    "epa_source_county_label": "Muskogee County",
    "county_or_equivalent_display": "Muskogee County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Muskogee County",
    "census_2025_geoid": "40101",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Noble, OK",
    "epa_source_county_label": "Noble County",
    "county_or_equivalent_display": "Noble County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Noble County",
    "census_2025_geoid": "40103",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Nowata, OK",
    "epa_source_county_label": "Nowata County",
    "county_or_equivalent_display": "Nowata County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Nowata County",
    "census_2025_geoid": "40105",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Okfuskee, OK",
    "epa_source_county_label": "Okfuskee County",
    "county_or_equivalent_display": "Okfuskee County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Okfuskee County",
    "census_2025_geoid": "40107",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Oklahoma, OK",
    "epa_source_county_label": "Oklahoma County",
    "county_or_equivalent_display": "Oklahoma County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Oklahoma County",
    "census_2025_geoid": "40109",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Okmulgee, OK",
    "epa_source_county_label": "Okmulgee County",
    "county_or_equivalent_display": "Okmulgee County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Okmulgee County",
    "census_2025_geoid": "40111",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Osage, OK",
    "epa_source_county_label": "Osage County",
    "county_or_equivalent_display": "Osage County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Osage County",
    "census_2025_geoid": "40113",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ottawa, OK",
    "epa_source_county_label": "Ottawa County",
    "county_or_equivalent_display": "Ottawa County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ottawa County",
    "census_2025_geoid": "40115",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pawnee, OK",
    "epa_source_county_label": "Pawnee County",
    "county_or_equivalent_display": "Pawnee County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pawnee County",
    "census_2025_geoid": "40117",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Payne, OK",
    "epa_source_county_label": "Payne County",
    "county_or_equivalent_display": "Payne County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Payne County",
    "census_2025_geoid": "40119",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pittsburg, OK",
    "epa_source_county_label": "Pittsburg County",
    "county_or_equivalent_display": "Pittsburg County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pittsburg County",
    "census_2025_geoid": "40121",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pontotoc, OK",
    "epa_source_county_label": "Pontotoc County",
    "county_or_equivalent_display": "Pontotoc County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pontotoc County",
    "census_2025_geoid": "40123",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pottawatomie, OK",
    "epa_source_county_label": "Pottawatomie County",
    "county_or_equivalent_display": "Pottawatomie County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pottawatomie County",
    "census_2025_geoid": "40125",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pushmataha, OK",
    "epa_source_county_label": "Pushmataha County",
    "county_or_equivalent_display": "Pushmataha County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pushmataha County",
    "census_2025_geoid": "40127",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Roger Mills, OK",
    "epa_source_county_label": "Roger Mills County",
    "county_or_equivalent_display": "Roger Mills County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Roger Mills County",
    "census_2025_geoid": "40129",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rogers, OK",
    "epa_source_county_label": "Rogers County",
    "county_or_equivalent_display": "Rogers County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rogers County",
    "census_2025_geoid": "40131",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Seminole, OK",
    "epa_source_county_label": "Seminole County",
    "county_or_equivalent_display": "Seminole County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Seminole County",
    "census_2025_geoid": "40133",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sequoyah, OK",
    "epa_source_county_label": "Sequoyah County",
    "county_or_equivalent_display": "Sequoyah County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sequoyah County",
    "census_2025_geoid": "40135",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Stephens, OK",
    "epa_source_county_label": "Stephens County",
    "county_or_equivalent_display": "Stephens County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Stephens County",
    "census_2025_geoid": "40137",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Texas, OK",
    "epa_source_county_label": "Texas County",
    "county_or_equivalent_display": "Texas County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Texas County",
    "census_2025_geoid": "40139",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tillman, OK",
    "epa_source_county_label": "Tillman County",
    "county_or_equivalent_display": "Tillman County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tillman County",
    "census_2025_geoid": "40141",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tulsa, OK",
    "epa_source_county_label": "Tulsa County",
    "county_or_equivalent_display": "Tulsa County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tulsa County",
    "census_2025_geoid": "40143",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wagoner, OK",
    "epa_source_county_label": "Wagoner County",
    "county_or_equivalent_display": "Wagoner County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wagoner County",
    "census_2025_geoid": "40145",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washington, OK",
    "epa_source_county_label": "Washington County",
    "county_or_equivalent_display": "Washington County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washington County",
    "census_2025_geoid": "40147",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washita, OK",
    "epa_source_county_label": "Washita County",
    "county_or_equivalent_display": "Washita County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washita County",
    "census_2025_geoid": "40149",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Woods, OK",
    "epa_source_county_label": "Woods County",
    "county_or_equivalent_display": "Woods County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Woods County",
    "census_2025_geoid": "40151",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Woodward, OK",
    "epa_source_county_label": "Woodward County",
    "county_or_equivalent_display": "Woodward County",
    "state_name": "Oklahoma",
    "state_abbreviation": "OK",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Woodward County",
    "census_2025_geoid": "40153",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Baker, OR",
    "epa_source_county_label": "Baker County",
    "county_or_equivalent_display": "Baker County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Baker County",
    "census_2025_geoid": "41001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Benton, OR",
    "epa_source_county_label": "Benton County",
    "county_or_equivalent_display": "Benton County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Benton County",
    "census_2025_geoid": "41003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clackamas, OR",
    "epa_source_county_label": "Clackamas County",
    "county_or_equivalent_display": "Clackamas County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clackamas County",
    "census_2025_geoid": "41005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clatsop, OR",
    "epa_source_county_label": "Clatsop County",
    "county_or_equivalent_display": "Clatsop County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clatsop County",
    "census_2025_geoid": "41007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Columbia, OR",
    "epa_source_county_label": "Columbia County",
    "county_or_equivalent_display": "Columbia County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Columbia County",
    "census_2025_geoid": "41009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Coos, OR",
    "epa_source_county_label": "Coos County",
    "county_or_equivalent_display": "Coos County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Coos County",
    "census_2025_geoid": "41011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Crook, OR",
    "epa_source_county_label": "Crook County",
    "county_or_equivalent_display": "Crook County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Crook County",
    "census_2025_geoid": "41013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Curry, OR",
    "epa_source_county_label": "Curry County",
    "county_or_equivalent_display": "Curry County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Curry County",
    "census_2025_geoid": "41015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Deschutes, OR",
    "epa_source_county_label": "Deschutes County",
    "county_or_equivalent_display": "Deschutes County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Deschutes County",
    "census_2025_geoid": "41017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Douglas, OR",
    "epa_source_county_label": "Douglas County",
    "county_or_equivalent_display": "Douglas County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Douglas County",
    "census_2025_geoid": "41019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gilliam, OR",
    "epa_source_county_label": "Gilliam County",
    "county_or_equivalent_display": "Gilliam County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gilliam County",
    "census_2025_geoid": "41021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grant, OR",
    "epa_source_county_label": "Grant County",
    "county_or_equivalent_display": "Grant County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grant County",
    "census_2025_geoid": "41023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Harney, OR",
    "epa_source_county_label": "Harney County",
    "county_or_equivalent_display": "Harney County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Harney County",
    "census_2025_geoid": "41025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hood River, OR",
    "epa_source_county_label": "Hood River County",
    "county_or_equivalent_display": "Hood River County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hood River County",
    "census_2025_geoid": "41027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jackson, OR",
    "epa_source_county_label": "Jackson County",
    "county_or_equivalent_display": "Jackson County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jackson County",
    "census_2025_geoid": "41029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jefferson, OR",
    "epa_source_county_label": "Jefferson County",
    "county_or_equivalent_display": "Jefferson County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jefferson County",
    "census_2025_geoid": "41031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Josephine, OR",
    "epa_source_county_label": "Josephine County",
    "county_or_equivalent_display": "Josephine County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Josephine County",
    "census_2025_geoid": "41033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Klamath, OR",
    "epa_source_county_label": "Klamath County",
    "county_or_equivalent_display": "Klamath County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Klamath County",
    "census_2025_geoid": "41035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lake, OR",
    "epa_source_county_label": "Lake County",
    "county_or_equivalent_display": "Lake County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lake County",
    "census_2025_geoid": "41037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lane, OR",
    "epa_source_county_label": "Lane County",
    "county_or_equivalent_display": "Lane County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lane County",
    "census_2025_geoid": "41039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lincoln, OR",
    "epa_source_county_label": "Lincoln County",
    "county_or_equivalent_display": "Lincoln County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lincoln County",
    "census_2025_geoid": "41041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Linn, OR",
    "epa_source_county_label": "Linn County",
    "county_or_equivalent_display": "Linn County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Linn County",
    "census_2025_geoid": "41043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Malheur, OR",
    "epa_source_county_label": "Malheur County",
    "county_or_equivalent_display": "Malheur County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Malheur County",
    "census_2025_geoid": "41045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marion, OR",
    "epa_source_county_label": "Marion County",
    "county_or_equivalent_display": "Marion County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marion County",
    "census_2025_geoid": "41047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Morrow, OR",
    "epa_source_county_label": "Morrow County",
    "county_or_equivalent_display": "Morrow County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Morrow County",
    "census_2025_geoid": "41049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Multnomah, OR",
    "epa_source_county_label": "Multnomah County",
    "county_or_equivalent_display": "Multnomah County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Multnomah County",
    "census_2025_geoid": "41051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Polk, OR",
    "epa_source_county_label": "Polk County",
    "county_or_equivalent_display": "Polk County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Polk County",
    "census_2025_geoid": "41053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sherman, OR",
    "epa_source_county_label": "Sherman County",
    "county_or_equivalent_display": "Sherman County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sherman County",
    "census_2025_geoid": "41055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tillamook, OR",
    "epa_source_county_label": "Tillamook County",
    "county_or_equivalent_display": "Tillamook County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tillamook County",
    "census_2025_geoid": "41057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Umatilla, OR",
    "epa_source_county_label": "Umatilla County",
    "county_or_equivalent_display": "Umatilla County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Umatilla County",
    "census_2025_geoid": "41059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Union, OR",
    "epa_source_county_label": "Union County",
    "county_or_equivalent_display": "Union County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Union County",
    "census_2025_geoid": "41061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wallowa, OR",
    "epa_source_county_label": "Wallowa County",
    "county_or_equivalent_display": "Wallowa County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wallowa County",
    "census_2025_geoid": "41063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wasco, OR",
    "epa_source_county_label": "Wasco County",
    "county_or_equivalent_display": "Wasco County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wasco County",
    "census_2025_geoid": "41065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washington, OR",
    "epa_source_county_label": "Washington County",
    "county_or_equivalent_display": "Washington County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washington County",
    "census_2025_geoid": "41067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wheeler, OR",
    "epa_source_county_label": "Wheeler County",
    "county_or_equivalent_display": "Wheeler County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wheeler County",
    "census_2025_geoid": "41069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Yamhill, OR",
    "epa_source_county_label": "Yamhill County",
    "county_or_equivalent_display": "Yamhill County",
    "state_name": "Oregon",
    "state_abbreviation": "OR",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Yamhill County",
    "census_2025_geoid": "41071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Adams, PA",
    "epa_source_county_label": "Adams County",
    "county_or_equivalent_display": "Adams County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Adams County",
    "census_2025_geoid": "42001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Allegheny, PA",
    "epa_source_county_label": "Allegheny County",
    "county_or_equivalent_display": "Allegheny County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Allegheny County",
    "census_2025_geoid": "42003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Armstrong, PA",
    "epa_source_county_label": "Armstrong County",
    "county_or_equivalent_display": "Armstrong County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Armstrong County",
    "census_2025_geoid": "42005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Beaver, PA",
    "epa_source_county_label": "Beaver County",
    "county_or_equivalent_display": "Beaver County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Beaver County",
    "census_2025_geoid": "42007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bedford, PA",
    "epa_source_county_label": "Bedford County",
    "county_or_equivalent_display": "Bedford County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bedford County",
    "census_2025_geoid": "42009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Berks, PA",
    "epa_source_county_label": "Berks County",
    "county_or_equivalent_display": "Berks County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Berks County",
    "census_2025_geoid": "42011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Blair, PA",
    "epa_source_county_label": "Blair County",
    "county_or_equivalent_display": "Blair County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Blair County",
    "census_2025_geoid": "42013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bradford, PA",
    "epa_source_county_label": "Bradford County",
    "county_or_equivalent_display": "Bradford County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bradford County",
    "census_2025_geoid": "42015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bucks, PA",
    "epa_source_county_label": "Bucks County",
    "county_or_equivalent_display": "Bucks County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bucks County",
    "census_2025_geoid": "42017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Butler, PA",
    "epa_source_county_label": "Butler County",
    "county_or_equivalent_display": "Butler County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Butler County",
    "census_2025_geoid": "42019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cambria, PA",
    "epa_source_county_label": "Cambria County",
    "county_or_equivalent_display": "Cambria County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cambria County",
    "census_2025_geoid": "42021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cameron, PA",
    "epa_source_county_label": "Cameron County",
    "county_or_equivalent_display": "Cameron County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cameron County",
    "census_2025_geoid": "42023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Carbon, PA",
    "epa_source_county_label": "Carbon County",
    "county_or_equivalent_display": "Carbon County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Carbon County",
    "census_2025_geoid": "42025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Centre, PA",
    "epa_source_county_label": "Centre County",
    "county_or_equivalent_display": "Centre County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Centre County",
    "census_2025_geoid": "42027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chester, PA",
    "epa_source_county_label": "Chester County",
    "county_or_equivalent_display": "Chester County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chester County",
    "census_2025_geoid": "42029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clarion, PA",
    "epa_source_county_label": "Clarion County",
    "county_or_equivalent_display": "Clarion County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clarion County",
    "census_2025_geoid": "42031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clearfield, PA",
    "epa_source_county_label": "Clearfield County",
    "county_or_equivalent_display": "Clearfield County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clearfield County",
    "census_2025_geoid": "42033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clinton, PA",
    "epa_source_county_label": "Clinton County",
    "county_or_equivalent_display": "Clinton County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clinton County",
    "census_2025_geoid": "42035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Columbia, PA",
    "epa_source_county_label": "Columbia County",
    "county_or_equivalent_display": "Columbia County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Columbia County",
    "census_2025_geoid": "42037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Crawford, PA",
    "epa_source_county_label": "Crawford County",
    "county_or_equivalent_display": "Crawford County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Crawford County",
    "census_2025_geoid": "42039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cumberland, PA",
    "epa_source_county_label": "Cumberland County",
    "county_or_equivalent_display": "Cumberland County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cumberland County",
    "census_2025_geoid": "42041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dauphin, PA",
    "epa_source_county_label": "Dauphin County",
    "county_or_equivalent_display": "Dauphin County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dauphin County",
    "census_2025_geoid": "42043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Delaware, PA",
    "epa_source_county_label": "Delaware County",
    "county_or_equivalent_display": "Delaware County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Delaware County",
    "census_2025_geoid": "42045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Elk, PA",
    "epa_source_county_label": "Elk County",
    "county_or_equivalent_display": "Elk County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Elk County",
    "census_2025_geoid": "42047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Erie, PA",
    "epa_source_county_label": "Erie County",
    "county_or_equivalent_display": "Erie County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Erie County",
    "census_2025_geoid": "42049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fayette, PA",
    "epa_source_county_label": "Fayette County",
    "county_or_equivalent_display": "Fayette County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fayette County",
    "census_2025_geoid": "42051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Forest, PA",
    "epa_source_county_label": "Forest County",
    "county_or_equivalent_display": "Forest County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Forest County",
    "census_2025_geoid": "42053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Franklin, PA",
    "epa_source_county_label": "Franklin County",
    "county_or_equivalent_display": "Franklin County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Franklin County",
    "census_2025_geoid": "42055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fulton, PA",
    "epa_source_county_label": "Fulton County",
    "county_or_equivalent_display": "Fulton County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fulton County",
    "census_2025_geoid": "42057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Greene, PA",
    "epa_source_county_label": "Greene County",
    "county_or_equivalent_display": "Greene County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Greene County",
    "census_2025_geoid": "42059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Huntingdon, PA",
    "epa_source_county_label": "Huntingdon County",
    "county_or_equivalent_display": "Huntingdon County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Huntingdon County",
    "census_2025_geoid": "42061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Indiana, PA",
    "epa_source_county_label": "Indiana County",
    "county_or_equivalent_display": "Indiana County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Indiana County",
    "census_2025_geoid": "42063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jefferson, PA",
    "epa_source_county_label": "Jefferson County",
    "county_or_equivalent_display": "Jefferson County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jefferson County",
    "census_2025_geoid": "42065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Juniata, PA",
    "epa_source_county_label": "Juniata County",
    "county_or_equivalent_display": "Juniata County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Juniata County",
    "census_2025_geoid": "42067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lackawanna, PA",
    "epa_source_county_label": "Lackawanna County",
    "county_or_equivalent_display": "Lackawanna County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lackawanna County",
    "census_2025_geoid": "42069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lancaster, PA",
    "epa_source_county_label": "Lancaster County",
    "county_or_equivalent_display": "Lancaster County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lancaster County",
    "census_2025_geoid": "42071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lawrence, PA",
    "epa_source_county_label": "Lawrence County",
    "county_or_equivalent_display": "Lawrence County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lawrence County",
    "census_2025_geoid": "42073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lebanon, PA",
    "epa_source_county_label": "Lebanon County",
    "county_or_equivalent_display": "Lebanon County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lebanon County",
    "census_2025_geoid": "42075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lehigh, PA",
    "epa_source_county_label": "Lehigh County",
    "county_or_equivalent_display": "Lehigh County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lehigh County",
    "census_2025_geoid": "42077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Luzerne, PA",
    "epa_source_county_label": "Luzerne County",
    "county_or_equivalent_display": "Luzerne County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Luzerne County",
    "census_2025_geoid": "42079",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lycoming, PA",
    "epa_source_county_label": "Lycoming County",
    "county_or_equivalent_display": "Lycoming County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lycoming County",
    "census_2025_geoid": "42081",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "McKean, PA",
    "epa_source_county_label": "McKean County",
    "county_or_equivalent_display": "McKean County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "McKean County",
    "census_2025_geoid": "42083",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mercer, PA",
    "epa_source_county_label": "Mercer County",
    "county_or_equivalent_display": "Mercer County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mercer County",
    "census_2025_geoid": "42085",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mifflin, PA",
    "epa_source_county_label": "Mifflin County",
    "county_or_equivalent_display": "Mifflin County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mifflin County",
    "census_2025_geoid": "42087",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Monroe, PA",
    "epa_source_county_label": "Monroe County",
    "county_or_equivalent_display": "Monroe County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Monroe County",
    "census_2025_geoid": "42089",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Montgomery, PA",
    "epa_source_county_label": "Montgomery County",
    "county_or_equivalent_display": "Montgomery County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Montgomery County",
    "census_2025_geoid": "42091",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Montour, PA",
    "epa_source_county_label": "Montour County",
    "county_or_equivalent_display": "Montour County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Montour County",
    "census_2025_geoid": "42093",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Northampton, PA",
    "epa_source_county_label": "Northampton County",
    "county_or_equivalent_display": "Northampton County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Northampton County",
    "census_2025_geoid": "42095",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Northumberland, PA",
    "epa_source_county_label": "Northumberland County",
    "county_or_equivalent_display": "Northumberland County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Northumberland County",
    "census_2025_geoid": "42097",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Perry, PA",
    "epa_source_county_label": "Perry County",
    "county_or_equivalent_display": "Perry County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Perry County",
    "census_2025_geoid": "42099",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Philadelphia, PA",
    "epa_source_county_label": "Philadelphia County",
    "county_or_equivalent_display": "Philadelphia County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Philadelphia County",
    "census_2025_geoid": "42101",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pike, PA",
    "epa_source_county_label": "Pike County",
    "county_or_equivalent_display": "Pike County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pike County",
    "census_2025_geoid": "42103",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Potter, PA",
    "epa_source_county_label": "Potter County",
    "county_or_equivalent_display": "Potter County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Potter County",
    "census_2025_geoid": "42105",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Schuylkill, PA",
    "epa_source_county_label": "Schuylkill County",
    "county_or_equivalent_display": "Schuylkill County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Schuylkill County",
    "census_2025_geoid": "42107",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Snyder, PA",
    "epa_source_county_label": "Snyder County",
    "county_or_equivalent_display": "Snyder County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Snyder County",
    "census_2025_geoid": "42109",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Somerset, PA",
    "epa_source_county_label": "Somerset County",
    "county_or_equivalent_display": "Somerset County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Somerset County",
    "census_2025_geoid": "42111",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sullivan, PA",
    "epa_source_county_label": "Sullivan County",
    "county_or_equivalent_display": "Sullivan County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sullivan County",
    "census_2025_geoid": "42113",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Susquehanna, PA",
    "epa_source_county_label": "Susquehanna County",
    "county_or_equivalent_display": "Susquehanna County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Susquehanna County",
    "census_2025_geoid": "42115",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tioga, PA",
    "epa_source_county_label": "Tioga County",
    "county_or_equivalent_display": "Tioga County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tioga County",
    "census_2025_geoid": "42117",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Union, PA",
    "epa_source_county_label": "Union County",
    "county_or_equivalent_display": "Union County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Union County",
    "census_2025_geoid": "42119",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Venango, PA",
    "epa_source_county_label": "Venango County",
    "county_or_equivalent_display": "Venango County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Venango County",
    "census_2025_geoid": "42121",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Warren, PA",
    "epa_source_county_label": "Warren County",
    "county_or_equivalent_display": "Warren County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Warren County",
    "census_2025_geoid": "42123",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washington, PA",
    "epa_source_county_label": "Washington County",
    "county_or_equivalent_display": "Washington County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washington County",
    "census_2025_geoid": "42125",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wayne, PA",
    "epa_source_county_label": "Wayne County",
    "county_or_equivalent_display": "Wayne County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wayne County",
    "census_2025_geoid": "42127",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Westmoreland, PA",
    "epa_source_county_label": "Westmoreland County",
    "county_or_equivalent_display": "Westmoreland County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Westmoreland County",
    "census_2025_geoid": "42129",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wyoming, PA",
    "epa_source_county_label": "Wyoming County",
    "county_or_equivalent_display": "Wyoming County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wyoming County",
    "census_2025_geoid": "42131",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "York, PA",
    "epa_source_county_label": "York County",
    "county_or_equivalent_display": "York County",
    "state_name": "Pennsylvania",
    "state_abbreviation": "PA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "York County",
    "census_2025_geoid": "42133",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bristol, RI",
    "epa_source_county_label": "Bristol County",
    "county_or_equivalent_display": "Bristol County",
    "state_name": "Rhode Island",
    "state_abbreviation": "RI",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bristol County",
    "census_2025_geoid": "44001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kent, RI",
    "epa_source_county_label": "Kent County",
    "county_or_equivalent_display": "Kent County",
    "state_name": "Rhode Island",
    "state_abbreviation": "RI",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kent County",
    "census_2025_geoid": "44003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Newport, RI",
    "epa_source_county_label": "Newport County",
    "county_or_equivalent_display": "Newport County",
    "state_name": "Rhode Island",
    "state_abbreviation": "RI",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Newport County",
    "census_2025_geoid": "44005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Providence, RI",
    "epa_source_county_label": "Providence County",
    "county_or_equivalent_display": "Providence County",
    "state_name": "Rhode Island",
    "state_abbreviation": "RI",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Providence County",
    "census_2025_geoid": "44007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washington, RI",
    "epa_source_county_label": "Washington County",
    "county_or_equivalent_display": "Washington County",
    "state_name": "Rhode Island",
    "state_abbreviation": "RI",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washington County",
    "census_2025_geoid": "44009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Abbeville, SC",
    "epa_source_county_label": "Abbeville County",
    "county_or_equivalent_display": "Abbeville County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Abbeville County",
    "census_2025_geoid": "45001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Aiken, SC",
    "epa_source_county_label": "Aiken County",
    "county_or_equivalent_display": "Aiken County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Aiken County",
    "census_2025_geoid": "45003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Allendale, SC",
    "epa_source_county_label": "Allendale County",
    "county_or_equivalent_display": "Allendale County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Allendale County",
    "census_2025_geoid": "45005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Anderson, SC",
    "epa_source_county_label": "Anderson County",
    "county_or_equivalent_display": "Anderson County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Anderson County",
    "census_2025_geoid": "45007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bamberg, SC",
    "epa_source_county_label": "Bamberg County",
    "county_or_equivalent_display": "Bamberg County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bamberg County",
    "census_2025_geoid": "45009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Barnwell, SC",
    "epa_source_county_label": "Barnwell County",
    "county_or_equivalent_display": "Barnwell County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Barnwell County",
    "census_2025_geoid": "45011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Beaufort, SC",
    "epa_source_county_label": "Beaufort County",
    "county_or_equivalent_display": "Beaufort County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Beaufort County",
    "census_2025_geoid": "45013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Berkeley, SC",
    "epa_source_county_label": "Berkeley County",
    "county_or_equivalent_display": "Berkeley County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Berkeley County",
    "census_2025_geoid": "45015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Calhoun, SC",
    "epa_source_county_label": "Calhoun County",
    "county_or_equivalent_display": "Calhoun County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Calhoun County",
    "census_2025_geoid": "45017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Charleston, SC",
    "epa_source_county_label": "Charleston County",
    "county_or_equivalent_display": "Charleston County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Charleston County",
    "census_2025_geoid": "45019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cherokee, SC",
    "epa_source_county_label": "Cherokee County",
    "county_or_equivalent_display": "Cherokee County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cherokee County",
    "census_2025_geoid": "45021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chester, SC",
    "epa_source_county_label": "Chester County",
    "county_or_equivalent_display": "Chester County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chester County",
    "census_2025_geoid": "45023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chesterfield, SC",
    "epa_source_county_label": "Chesterfield County",
    "county_or_equivalent_display": "Chesterfield County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chesterfield County",
    "census_2025_geoid": "45025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clarendon, SC",
    "epa_source_county_label": "Clarendon County",
    "county_or_equivalent_display": "Clarendon County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clarendon County",
    "census_2025_geoid": "45027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Colleton, SC",
    "epa_source_county_label": "Colleton County",
    "county_or_equivalent_display": "Colleton County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Colleton County",
    "census_2025_geoid": "45029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Darlington, SC",
    "epa_source_county_label": "Darlington County",
    "county_or_equivalent_display": "Darlington County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Darlington County",
    "census_2025_geoid": "45031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dillon, SC",
    "epa_source_county_label": "Dillon County",
    "county_or_equivalent_display": "Dillon County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dillon County",
    "census_2025_geoid": "45033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dorchester, SC",
    "epa_source_county_label": "Dorchester County",
    "county_or_equivalent_display": "Dorchester County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dorchester County",
    "census_2025_geoid": "45035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Edgefield, SC",
    "epa_source_county_label": "Edgefield County",
    "county_or_equivalent_display": "Edgefield County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Edgefield County",
    "census_2025_geoid": "45037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fairfield, SC",
    "epa_source_county_label": "Fairfield County",
    "county_or_equivalent_display": "Fairfield County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fairfield County",
    "census_2025_geoid": "45039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Florence, SC",
    "epa_source_county_label": "Florence County",
    "county_or_equivalent_display": "Florence County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Florence County",
    "census_2025_geoid": "45041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Georgetown, SC",
    "epa_source_county_label": "Georgetown County",
    "county_or_equivalent_display": "Georgetown County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Georgetown County",
    "census_2025_geoid": "45043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Greenville, SC",
    "epa_source_county_label": "Greenville County",
    "county_or_equivalent_display": "Greenville County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Greenville County",
    "census_2025_geoid": "45045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Greenwood, SC",
    "epa_source_county_label": "Greenwood County",
    "county_or_equivalent_display": "Greenwood County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Greenwood County",
    "census_2025_geoid": "45047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hampton, SC",
    "epa_source_county_label": "Hampton County",
    "county_or_equivalent_display": "Hampton County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hampton County",
    "census_2025_geoid": "45049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Horry, SC",
    "epa_source_county_label": "Horry County",
    "county_or_equivalent_display": "Horry County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Horry County",
    "census_2025_geoid": "45051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jasper, SC",
    "epa_source_county_label": "Jasper County",
    "county_or_equivalent_display": "Jasper County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jasper County",
    "census_2025_geoid": "45053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kershaw, SC",
    "epa_source_county_label": "Kershaw County",
    "county_or_equivalent_display": "Kershaw County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kershaw County",
    "census_2025_geoid": "45055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lancaster, SC",
    "epa_source_county_label": "Lancaster County",
    "county_or_equivalent_display": "Lancaster County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lancaster County",
    "census_2025_geoid": "45057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Laurens, SC",
    "epa_source_county_label": "Laurens County",
    "county_or_equivalent_display": "Laurens County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Laurens County",
    "census_2025_geoid": "45059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lee, SC",
    "epa_source_county_label": "Lee County",
    "county_or_equivalent_display": "Lee County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lee County",
    "census_2025_geoid": "45061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lexington, SC",
    "epa_source_county_label": "Lexington County",
    "county_or_equivalent_display": "Lexington County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lexington County",
    "census_2025_geoid": "45063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marion, SC",
    "epa_source_county_label": "Marion County",
    "county_or_equivalent_display": "Marion County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marion County",
    "census_2025_geoid": "45067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marlboro, SC",
    "epa_source_county_label": "Marlboro County",
    "county_or_equivalent_display": "Marlboro County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marlboro County",
    "census_2025_geoid": "45069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "McCormick, SC",
    "epa_source_county_label": "McCormick County",
    "county_or_equivalent_display": "McCormick County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "McCormick County",
    "census_2025_geoid": "45065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Newberry, SC",
    "epa_source_county_label": "Newberry County",
    "county_or_equivalent_display": "Newberry County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Newberry County",
    "census_2025_geoid": "45071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Oconee, SC",
    "epa_source_county_label": "Oconee County",
    "county_or_equivalent_display": "Oconee County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Oconee County",
    "census_2025_geoid": "45073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Orangeburg, SC",
    "epa_source_county_label": "Orangeburg County",
    "county_or_equivalent_display": "Orangeburg County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Orangeburg County",
    "census_2025_geoid": "45075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pickens, SC",
    "epa_source_county_label": "Pickens County",
    "county_or_equivalent_display": "Pickens County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pickens County",
    "census_2025_geoid": "45077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Richland, SC",
    "epa_source_county_label": "Richland County",
    "county_or_equivalent_display": "Richland County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Richland County",
    "census_2025_geoid": "45079",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Saluda, SC",
    "epa_source_county_label": "Saluda County",
    "county_or_equivalent_display": "Saluda County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Saluda County",
    "census_2025_geoid": "45081",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Spartanburg, SC",
    "epa_source_county_label": "Spartanburg County",
    "county_or_equivalent_display": "Spartanburg County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Spartanburg County",
    "census_2025_geoid": "45083",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sumter, SC",
    "epa_source_county_label": "Sumter County",
    "county_or_equivalent_display": "Sumter County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sumter County",
    "census_2025_geoid": "45085",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Union, SC",
    "epa_source_county_label": "Union County",
    "county_or_equivalent_display": "Union County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Union County",
    "census_2025_geoid": "45087",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Williamsburg, SC",
    "epa_source_county_label": "Williamsburg County",
    "county_or_equivalent_display": "Williamsburg County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Williamsburg County",
    "census_2025_geoid": "45089",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "York, SC",
    "epa_source_county_label": "York County",
    "county_or_equivalent_display": "York County",
    "state_name": "South Carolina",
    "state_abbreviation": "SC",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "York County",
    "census_2025_geoid": "45091",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Aurora, SD",
    "epa_source_county_label": "Aurora County",
    "county_or_equivalent_display": "Aurora County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Aurora County",
    "census_2025_geoid": "46003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Beadle, SD",
    "epa_source_county_label": "Beadle County",
    "county_or_equivalent_display": "Beadle County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Beadle County",
    "census_2025_geoid": "46005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bennett, SD",
    "epa_source_county_label": "Bennett County",
    "county_or_equivalent_display": "Bennett County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bennett County",
    "census_2025_geoid": "46007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bon Homme, SD",
    "epa_source_county_label": "Bon Homme County",
    "county_or_equivalent_display": "Bon Homme County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bon Homme County",
    "census_2025_geoid": "46009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Brookings, SD",
    "epa_source_county_label": "Brookings County",
    "county_or_equivalent_display": "Brookings County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Brookings County",
    "census_2025_geoid": "46011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Brown, SD",
    "epa_source_county_label": "Brown County",
    "county_or_equivalent_display": "Brown County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Brown County",
    "census_2025_geoid": "46013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Brule, SD",
    "epa_source_county_label": "Brule County",
    "county_or_equivalent_display": "Brule County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Brule County",
    "census_2025_geoid": "46015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Buffalo, SD",
    "epa_source_county_label": "Buffalo County",
    "county_or_equivalent_display": "Buffalo County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Buffalo County",
    "census_2025_geoid": "46017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Butte, SD",
    "epa_source_county_label": "Butte County",
    "county_or_equivalent_display": "Butte County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Butte County",
    "census_2025_geoid": "46019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Campbell, SD",
    "epa_source_county_label": "Campbell County",
    "county_or_equivalent_display": "Campbell County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Campbell County",
    "census_2025_geoid": "46021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Charles Mix, SD",
    "epa_source_county_label": "Charles Mix County",
    "county_or_equivalent_display": "Charles Mix County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Charles Mix County",
    "census_2025_geoid": "46023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clark, SD",
    "epa_source_county_label": "Clark County",
    "county_or_equivalent_display": "Clark County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clark County",
    "census_2025_geoid": "46025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clay, SD",
    "epa_source_county_label": "Clay County",
    "county_or_equivalent_display": "Clay County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clay County",
    "census_2025_geoid": "46027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Codington, SD",
    "epa_source_county_label": "Codington County",
    "county_or_equivalent_display": "Codington County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Codington County",
    "census_2025_geoid": "46029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Corson, SD",
    "epa_source_county_label": "Corson County",
    "county_or_equivalent_display": "Corson County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Corson County",
    "census_2025_geoid": "46031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Custer, SD",
    "epa_source_county_label": "Custer County",
    "county_or_equivalent_display": "Custer County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Custer County",
    "census_2025_geoid": "46033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Davison, SD",
    "epa_source_county_label": "Davison County",
    "county_or_equivalent_display": "Davison County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Davison County",
    "census_2025_geoid": "46035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Day, SD",
    "epa_source_county_label": "Day County",
    "county_or_equivalent_display": "Day County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Day County",
    "census_2025_geoid": "46037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Deuel, SD",
    "epa_source_county_label": "Deuel County",
    "county_or_equivalent_display": "Deuel County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Deuel County",
    "census_2025_geoid": "46039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dewey, SD",
    "epa_source_county_label": "Dewey County",
    "county_or_equivalent_display": "Dewey County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dewey County",
    "census_2025_geoid": "46041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Douglas, SD",
    "epa_source_county_label": "Douglas County",
    "county_or_equivalent_display": "Douglas County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Douglas County",
    "census_2025_geoid": "46043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Edmunds, SD",
    "epa_source_county_label": "Edmunds County",
    "county_or_equivalent_display": "Edmunds County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Edmunds County",
    "census_2025_geoid": "46045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fall River, SD",
    "epa_source_county_label": "Fall River County",
    "county_or_equivalent_display": "Fall River County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fall River County",
    "census_2025_geoid": "46047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Faulk, SD",
    "epa_source_county_label": "Faulk County",
    "county_or_equivalent_display": "Faulk County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Faulk County",
    "census_2025_geoid": "46049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grant, SD",
    "epa_source_county_label": "Grant County",
    "county_or_equivalent_display": "Grant County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grant County",
    "census_2025_geoid": "46051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gregory, SD",
    "epa_source_county_label": "Gregory County",
    "county_or_equivalent_display": "Gregory County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gregory County",
    "census_2025_geoid": "46053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Haakon, SD",
    "epa_source_county_label": "Haakon County",
    "county_or_equivalent_display": "Haakon County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Haakon County",
    "census_2025_geoid": "46055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hamlin, SD",
    "epa_source_county_label": "Hamlin County",
    "county_or_equivalent_display": "Hamlin County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hamlin County",
    "census_2025_geoid": "46057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hand, SD",
    "epa_source_county_label": "Hand County",
    "county_or_equivalent_display": "Hand County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hand County",
    "census_2025_geoid": "46059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hanson, SD",
    "epa_source_county_label": "Hanson County",
    "county_or_equivalent_display": "Hanson County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hanson County",
    "census_2025_geoid": "46061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Harding, SD",
    "epa_source_county_label": "Harding County",
    "county_or_equivalent_display": "Harding County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Harding County",
    "census_2025_geoid": "46063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hughes, SD",
    "epa_source_county_label": "Hughes County",
    "county_or_equivalent_display": "Hughes County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hughes County",
    "census_2025_geoid": "46065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hutchinson, SD",
    "epa_source_county_label": "Hutchinson County",
    "county_or_equivalent_display": "Hutchinson County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hutchinson County",
    "census_2025_geoid": "46067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hyde, SD",
    "epa_source_county_label": "Hyde County",
    "county_or_equivalent_display": "Hyde County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hyde County",
    "census_2025_geoid": "46069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jackson, SD",
    "epa_source_county_label": "Jackson County",
    "county_or_equivalent_display": "Jackson County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jackson County",
    "census_2025_geoid": "46071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jerauld, SD",
    "epa_source_county_label": "Jerauld County",
    "county_or_equivalent_display": "Jerauld County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jerauld County",
    "census_2025_geoid": "46073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jones, SD",
    "epa_source_county_label": "Jones County",
    "county_or_equivalent_display": "Jones County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jones County",
    "census_2025_geoid": "46075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kingsbury, SD",
    "epa_source_county_label": "Kingsbury County",
    "county_or_equivalent_display": "Kingsbury County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kingsbury County",
    "census_2025_geoid": "46077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lake, SD",
    "epa_source_county_label": "Lake County",
    "county_or_equivalent_display": "Lake County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lake County",
    "census_2025_geoid": "46079",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lawrence, SD",
    "epa_source_county_label": "Lawrence County",
    "county_or_equivalent_display": "Lawrence County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lawrence County",
    "census_2025_geoid": "46081",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lincoln, SD",
    "epa_source_county_label": "Lincoln County",
    "county_or_equivalent_display": "Lincoln County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lincoln County",
    "census_2025_geoid": "46083",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lyman, SD",
    "epa_source_county_label": "Lyman County",
    "county_or_equivalent_display": "Lyman County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lyman County",
    "census_2025_geoid": "46085",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marshall, SD",
    "epa_source_county_label": "Marshall County",
    "county_or_equivalent_display": "Marshall County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marshall County",
    "census_2025_geoid": "46091",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "McCook, SD",
    "epa_source_county_label": "McCook County",
    "county_or_equivalent_display": "McCook County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "McCook County",
    "census_2025_geoid": "46087",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "McPherson, SD",
    "epa_source_county_label": "McPherson County",
    "county_or_equivalent_display": "McPherson County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "McPherson County",
    "census_2025_geoid": "46089",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Meade, SD",
    "epa_source_county_label": "Meade County",
    "county_or_equivalent_display": "Meade County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Meade County",
    "census_2025_geoid": "46093",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mellette, SD",
    "epa_source_county_label": "Mellette County",
    "county_or_equivalent_display": "Mellette County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mellette County",
    "census_2025_geoid": "46095",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Miner, SD",
    "epa_source_county_label": "Miner County",
    "county_or_equivalent_display": "Miner County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Miner County",
    "census_2025_geoid": "46097",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Minnehaha, SD",
    "epa_source_county_label": "Minnehaha County",
    "county_or_equivalent_display": "Minnehaha County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Minnehaha County",
    "census_2025_geoid": "46099",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Moody, SD",
    "epa_source_county_label": "Moody County",
    "county_or_equivalent_display": "Moody County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Moody County",
    "census_2025_geoid": "46101",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pennington, SD",
    "epa_source_county_label": "Pennington County",
    "county_or_equivalent_display": "Pennington County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pennington County",
    "census_2025_geoid": "46103",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Perkins, SD",
    "epa_source_county_label": "Perkins County",
    "county_or_equivalent_display": "Perkins County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Perkins County",
    "census_2025_geoid": "46105",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Potter, SD",
    "epa_source_county_label": "Potter County",
    "county_or_equivalent_display": "Potter County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Potter County",
    "census_2025_geoid": "46107",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Roberts, SD",
    "epa_source_county_label": "Roberts County",
    "county_or_equivalent_display": "Roberts County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Roberts County",
    "census_2025_geoid": "46109",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sanborn, SD",
    "epa_source_county_label": "Sanborn County",
    "county_or_equivalent_display": "Sanborn County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sanborn County",
    "census_2025_geoid": "46111",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Shannon, SD",
    "epa_source_county_label": "Shannon County",
    "county_or_equivalent_display": "Shannon County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "legacy_or_unmatched",
    "census_2025_county_or_equivalent_name": "",
    "census_2025_geoid": "",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; current Census geography match intentionally left unresolved.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "EPA source geography has no direct name match in the 2025 Census file; no current GEOID was assigned and no zone was silently reallocated."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Spink, SD",
    "epa_source_county_label": "Spink County",
    "county_or_equivalent_display": "Spink County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Spink County",
    "census_2025_geoid": "46115",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Stanley, SD",
    "epa_source_county_label": "Stanley County",
    "county_or_equivalent_display": "Stanley County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Stanley County",
    "census_2025_geoid": "46117",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sully, SD",
    "epa_source_county_label": "Sully County",
    "county_or_equivalent_display": "Sully County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sully County",
    "census_2025_geoid": "46119",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Todd, SD",
    "epa_source_county_label": "Todd County",
    "county_or_equivalent_display": "Todd County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Todd County",
    "census_2025_geoid": "46121",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tripp, SD",
    "epa_source_county_label": "Tripp County",
    "county_or_equivalent_display": "Tripp County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tripp County",
    "census_2025_geoid": "46123",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Turner, SD",
    "epa_source_county_label": "Turner County",
    "county_or_equivalent_display": "Turner County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Turner County",
    "census_2025_geoid": "46125",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Union, SD",
    "epa_source_county_label": "Union County",
    "county_or_equivalent_display": "Union County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Union County",
    "census_2025_geoid": "46127",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Walworth, SD",
    "epa_source_county_label": "Walworth County",
    "county_or_equivalent_display": "Walworth County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Walworth County",
    "census_2025_geoid": "46129",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Yankton, SD",
    "epa_source_county_label": "Yankton County",
    "county_or_equivalent_display": "Yankton County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Yankton County",
    "census_2025_geoid": "46135",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ziebach, SD",
    "epa_source_county_label": "Ziebach County",
    "county_or_equivalent_display": "Ziebach County",
    "state_name": "South Dakota",
    "state_abbreviation": "SD",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ziebach County",
    "census_2025_geoid": "46137",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Anderson, TN",
    "epa_source_county_label": "Anderson County",
    "county_or_equivalent_display": "Anderson County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Anderson County",
    "census_2025_geoid": "47001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bedford, TN",
    "epa_source_county_label": "Bedford County",
    "county_or_equivalent_display": "Bedford County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bedford County",
    "census_2025_geoid": "47003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Benton, TN",
    "epa_source_county_label": "Benton County",
    "county_or_equivalent_display": "Benton County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Benton County",
    "census_2025_geoid": "47005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bledsoe, TN",
    "epa_source_county_label": "Bledsoe County",
    "county_or_equivalent_display": "Bledsoe County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bledsoe County",
    "census_2025_geoid": "47007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Blount, TN",
    "epa_source_county_label": "Blount County",
    "county_or_equivalent_display": "Blount County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Blount County",
    "census_2025_geoid": "47009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bradley, TN",
    "epa_source_county_label": "Bradley County",
    "county_or_equivalent_display": "Bradley County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bradley County",
    "census_2025_geoid": "47011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Campbell, TN",
    "epa_source_county_label": "Campbell County",
    "county_or_equivalent_display": "Campbell County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Campbell County",
    "census_2025_geoid": "47013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cannon, TN",
    "epa_source_county_label": "Cannon County",
    "county_or_equivalent_display": "Cannon County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cannon County",
    "census_2025_geoid": "47015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Carroll, TN",
    "epa_source_county_label": "Carroll County",
    "county_or_equivalent_display": "Carroll County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Carroll County",
    "census_2025_geoid": "47017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Carter, TN",
    "epa_source_county_label": "Carter County",
    "county_or_equivalent_display": "Carter County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Carter County",
    "census_2025_geoid": "47019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cheatham, TN",
    "epa_source_county_label": "Cheatham County",
    "county_or_equivalent_display": "Cheatham County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cheatham County",
    "census_2025_geoid": "47021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chester, TN",
    "epa_source_county_label": "Chester County",
    "county_or_equivalent_display": "Chester County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chester County",
    "census_2025_geoid": "47023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Claiborne, TN",
    "epa_source_county_label": "Claiborne County",
    "county_or_equivalent_display": "Claiborne County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Claiborne County",
    "census_2025_geoid": "47025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clay, TN",
    "epa_source_county_label": "Clay County",
    "county_or_equivalent_display": "Clay County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clay County",
    "census_2025_geoid": "47027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cocke, TN",
    "epa_source_county_label": "Cocke County",
    "county_or_equivalent_display": "Cocke County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cocke County",
    "census_2025_geoid": "47029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Coffee, TN",
    "epa_source_county_label": "Coffee County",
    "county_or_equivalent_display": "Coffee County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Coffee County",
    "census_2025_geoid": "47031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Crockett, TN",
    "epa_source_county_label": "Crockett County",
    "county_or_equivalent_display": "Crockett County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Crockett County",
    "census_2025_geoid": "47033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cumberland, TN",
    "epa_source_county_label": "Cumberland County",
    "county_or_equivalent_display": "Cumberland County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cumberland County",
    "census_2025_geoid": "47035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Davidson, TN",
    "epa_source_county_label": "Davidson County",
    "county_or_equivalent_display": "Davidson County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Davidson County",
    "census_2025_geoid": "47037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "DeKalb, TN",
    "epa_source_county_label": "DeKalb County",
    "county_or_equivalent_display": "DeKalb County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "DeKalb County",
    "census_2025_geoid": "47041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Decatur, TN",
    "epa_source_county_label": "Decatur County",
    "county_or_equivalent_display": "Decatur County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Decatur County",
    "census_2025_geoid": "47039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dickson, TN",
    "epa_source_county_label": "Dickson County",
    "county_or_equivalent_display": "Dickson County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dickson County",
    "census_2025_geoid": "47043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dyer, TN",
    "epa_source_county_label": "Dyer County",
    "county_or_equivalent_display": "Dyer County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dyer County",
    "census_2025_geoid": "47045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fayette, TN",
    "epa_source_county_label": "Fayette County",
    "county_or_equivalent_display": "Fayette County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fayette County",
    "census_2025_geoid": "47047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fentress, TN",
    "epa_source_county_label": "Fentress County",
    "county_or_equivalent_display": "Fentress County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fentress County",
    "census_2025_geoid": "47049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Franklin, TN",
    "epa_source_county_label": "Franklin County",
    "county_or_equivalent_display": "Franklin County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Franklin County",
    "census_2025_geoid": "47051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gibson, TN",
    "epa_source_county_label": "Gibson County",
    "county_or_equivalent_display": "Gibson County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gibson County",
    "census_2025_geoid": "47053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Giles, TN",
    "epa_source_county_label": "Giles County",
    "county_or_equivalent_display": "Giles County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Giles County",
    "census_2025_geoid": "47055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grainger, TN",
    "epa_source_county_label": "Grainger County",
    "county_or_equivalent_display": "Grainger County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grainger County",
    "census_2025_geoid": "47057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Greene, TN",
    "epa_source_county_label": "Greene County",
    "county_or_equivalent_display": "Greene County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Greene County",
    "census_2025_geoid": "47059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grundy, TN",
    "epa_source_county_label": "Grundy County",
    "county_or_equivalent_display": "Grundy County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grundy County",
    "census_2025_geoid": "47061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hamblen, TN",
    "epa_source_county_label": "Hamblen County",
    "county_or_equivalent_display": "Hamblen County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hamblen County",
    "census_2025_geoid": "47063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hamilton, TN",
    "epa_source_county_label": "Hamilton County",
    "county_or_equivalent_display": "Hamilton County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hamilton County",
    "census_2025_geoid": "47065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hancock, TN",
    "epa_source_county_label": "Hancock County",
    "county_or_equivalent_display": "Hancock County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hancock County",
    "census_2025_geoid": "47067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hardeman, TN",
    "epa_source_county_label": "Hardeman County",
    "county_or_equivalent_display": "Hardeman County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hardeman County",
    "census_2025_geoid": "47069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hardin, TN",
    "epa_source_county_label": "Hardin County",
    "county_or_equivalent_display": "Hardin County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hardin County",
    "census_2025_geoid": "47071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hawkins, TN",
    "epa_source_county_label": "Hawkins County",
    "county_or_equivalent_display": "Hawkins County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hawkins County",
    "census_2025_geoid": "47073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Haywood, TN",
    "epa_source_county_label": "Haywood County",
    "county_or_equivalent_display": "Haywood County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Haywood County",
    "census_2025_geoid": "47075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Henderson, TN",
    "epa_source_county_label": "Henderson County",
    "county_or_equivalent_display": "Henderson County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Henderson County",
    "census_2025_geoid": "47077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Henry, TN",
    "epa_source_county_label": "Henry County",
    "county_or_equivalent_display": "Henry County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Henry County",
    "census_2025_geoid": "47079",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hickman, TN",
    "epa_source_county_label": "Hickman County",
    "county_or_equivalent_display": "Hickman County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hickman County",
    "census_2025_geoid": "47081",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Houston, TN",
    "epa_source_county_label": "Houston County",
    "county_or_equivalent_display": "Houston County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Houston County",
    "census_2025_geoid": "47083",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Humphreys, TN",
    "epa_source_county_label": "Humphreys County",
    "county_or_equivalent_display": "Humphreys County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Humphreys County",
    "census_2025_geoid": "47085",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jackson, TN",
    "epa_source_county_label": "Jackson County",
    "county_or_equivalent_display": "Jackson County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jackson County",
    "census_2025_geoid": "47087",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jefferson, TN",
    "epa_source_county_label": "Jefferson County",
    "county_or_equivalent_display": "Jefferson County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jefferson County",
    "census_2025_geoid": "47089",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Johnson, TN",
    "epa_source_county_label": "Johnson County",
    "county_or_equivalent_display": "Johnson County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Johnson County",
    "census_2025_geoid": "47091",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Knox, TN",
    "epa_source_county_label": "Knox County",
    "county_or_equivalent_display": "Knox County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Knox County",
    "census_2025_geoid": "47093",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lake, TN",
    "epa_source_county_label": "Lake County",
    "county_or_equivalent_display": "Lake County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lake County",
    "census_2025_geoid": "47095",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lauderdale, TN",
    "epa_source_county_label": "Lauderdale County",
    "county_or_equivalent_display": "Lauderdale County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lauderdale County",
    "census_2025_geoid": "47097",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lawrence, TN",
    "epa_source_county_label": "Lawrence County",
    "county_or_equivalent_display": "Lawrence County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lawrence County",
    "census_2025_geoid": "47099",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lewis, TN",
    "epa_source_county_label": "Lewis County",
    "county_or_equivalent_display": "Lewis County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lewis County",
    "census_2025_geoid": "47101",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lincoln, TN",
    "epa_source_county_label": "Lincoln County",
    "county_or_equivalent_display": "Lincoln County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lincoln County",
    "census_2025_geoid": "47103",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Loudon, TN",
    "epa_source_county_label": "Loudon County",
    "county_or_equivalent_display": "Loudon County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Loudon County",
    "census_2025_geoid": "47105",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Macon, TN",
    "epa_source_county_label": "Macon County",
    "county_or_equivalent_display": "Macon County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Macon County",
    "census_2025_geoid": "47111",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Madison, TN",
    "epa_source_county_label": "Madison County",
    "county_or_equivalent_display": "Madison County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Madison County",
    "census_2025_geoid": "47113",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marion, TN",
    "epa_source_county_label": "Marion County",
    "county_or_equivalent_display": "Marion County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marion County",
    "census_2025_geoid": "47115",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marshall, TN",
    "epa_source_county_label": "Marshall County",
    "county_or_equivalent_display": "Marshall County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marshall County",
    "census_2025_geoid": "47117",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Maury, TN",
    "epa_source_county_label": "Maury County",
    "county_or_equivalent_display": "Maury County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Maury County",
    "census_2025_geoid": "47119",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "McMinn, TN",
    "epa_source_county_label": "McMinn County",
    "county_or_equivalent_display": "McMinn County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "McMinn County",
    "census_2025_geoid": "47107",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "McNairy, TN",
    "epa_source_county_label": "McNairy County",
    "county_or_equivalent_display": "McNairy County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "McNairy County",
    "census_2025_geoid": "47109",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Meigs, TN",
    "epa_source_county_label": "Meigs County",
    "county_or_equivalent_display": "Meigs County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Meigs County",
    "census_2025_geoid": "47121",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Monroe, TN",
    "epa_source_county_label": "Monroe County",
    "county_or_equivalent_display": "Monroe County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Monroe County",
    "census_2025_geoid": "47123",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Montgomery, TN",
    "epa_source_county_label": "Montgomery County",
    "county_or_equivalent_display": "Montgomery County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Montgomery County",
    "census_2025_geoid": "47125",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Moore, TN",
    "epa_source_county_label": "Moore County",
    "county_or_equivalent_display": "Moore County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Moore County",
    "census_2025_geoid": "47127",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Morgan, TN",
    "epa_source_county_label": "Morgan County",
    "county_or_equivalent_display": "Morgan County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Morgan County",
    "census_2025_geoid": "47129",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Obion, TN",
    "epa_source_county_label": "Obion County",
    "county_or_equivalent_display": "Obion County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Obion County",
    "census_2025_geoid": "47131",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Overton, TN",
    "epa_source_county_label": "Overton County",
    "county_or_equivalent_display": "Overton County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Overton County",
    "census_2025_geoid": "47133",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Perry, TN",
    "epa_source_county_label": "Perry County",
    "county_or_equivalent_display": "Perry County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Perry County",
    "census_2025_geoid": "47135",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pickett, TN",
    "epa_source_county_label": "Pickett County",
    "county_or_equivalent_display": "Pickett County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pickett County",
    "census_2025_geoid": "47137",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Polk, TN",
    "epa_source_county_label": "Polk County",
    "county_or_equivalent_display": "Polk County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Polk County",
    "census_2025_geoid": "47139",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Putnam, TN",
    "epa_source_county_label": "Putnam County",
    "county_or_equivalent_display": "Putnam County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Putnam County",
    "census_2025_geoid": "47141",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rhea, TN",
    "epa_source_county_label": "Rhea County",
    "county_or_equivalent_display": "Rhea County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rhea County",
    "census_2025_geoid": "47143",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Roane, TN",
    "epa_source_county_label": "Roane County",
    "county_or_equivalent_display": "Roane County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Roane County",
    "census_2025_geoid": "47145",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Robertson, TN",
    "epa_source_county_label": "Robertson County",
    "county_or_equivalent_display": "Robertson County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Robertson County",
    "census_2025_geoid": "47147",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rutherford, TN",
    "epa_source_county_label": "Rutherford County",
    "county_or_equivalent_display": "Rutherford County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rutherford County",
    "census_2025_geoid": "47149",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Scott, TN",
    "epa_source_county_label": "Scott County",
    "county_or_equivalent_display": "Scott County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Scott County",
    "census_2025_geoid": "47151",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sequatchie, TN",
    "epa_source_county_label": "Sequatchie County",
    "county_or_equivalent_display": "Sequatchie County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sequatchie County",
    "census_2025_geoid": "47153",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sevier, TN",
    "epa_source_county_label": "Sevier County",
    "county_or_equivalent_display": "Sevier County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sevier County",
    "census_2025_geoid": "47155",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Shelby, TN",
    "epa_source_county_label": "Shelby County",
    "county_or_equivalent_display": "Shelby County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Shelby County",
    "census_2025_geoid": "47157",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Smith, TN",
    "epa_source_county_label": "Smith County",
    "county_or_equivalent_display": "Smith County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Smith County",
    "census_2025_geoid": "47159",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Stewart, TN",
    "epa_source_county_label": "Stewart County",
    "county_or_equivalent_display": "Stewart County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Stewart County",
    "census_2025_geoid": "47161",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sullivan, TN",
    "epa_source_county_label": "Sullivan County",
    "county_or_equivalent_display": "Sullivan County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sullivan County",
    "census_2025_geoid": "47163",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sumner, TN",
    "epa_source_county_label": "Sumner County",
    "county_or_equivalent_display": "Sumner County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sumner County",
    "census_2025_geoid": "47165",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tipton, TN",
    "epa_source_county_label": "Tipton County",
    "county_or_equivalent_display": "Tipton County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tipton County",
    "census_2025_geoid": "47167",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Trousdale, TN",
    "epa_source_county_label": "Trousdale County",
    "county_or_equivalent_display": "Trousdale County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Trousdale County",
    "census_2025_geoid": "47169",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Unicoi, TN",
    "epa_source_county_label": "Unicoi County",
    "county_or_equivalent_display": "Unicoi County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Unicoi County",
    "census_2025_geoid": "47171",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Union, TN",
    "epa_source_county_label": "Union County",
    "county_or_equivalent_display": "Union County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Union County",
    "census_2025_geoid": "47173",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Van Buren, TN",
    "epa_source_county_label": "Van Buren County",
    "county_or_equivalent_display": "Van Buren County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Van Buren County",
    "census_2025_geoid": "47175",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Warren, TN",
    "epa_source_county_label": "Warren County",
    "county_or_equivalent_display": "Warren County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Warren County",
    "census_2025_geoid": "47177",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washington, TN",
    "epa_source_county_label": "Washington County",
    "county_or_equivalent_display": "Washington County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washington County",
    "census_2025_geoid": "47179",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wayne, TN",
    "epa_source_county_label": "Wayne County",
    "county_or_equivalent_display": "Wayne County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wayne County",
    "census_2025_geoid": "47181",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Weakley, TN",
    "epa_source_county_label": "Weakley County",
    "county_or_equivalent_display": "Weakley County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Weakley County",
    "census_2025_geoid": "47183",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "White, TN",
    "epa_source_county_label": "White County",
    "county_or_equivalent_display": "White County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "White County",
    "census_2025_geoid": "47185",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Williamson, TN",
    "epa_source_county_label": "Williamson County",
    "county_or_equivalent_display": "Williamson County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Williamson County",
    "census_2025_geoid": "47187",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wilson, TN",
    "epa_source_county_label": "Wilson County",
    "county_or_equivalent_display": "Wilson County",
    "state_name": "Tennessee",
    "state_abbreviation": "TN",
    "geography_type": "county",
    "epa_region_source_value": "4",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wilson County",
    "census_2025_geoid": "47189",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Anderson, TX",
    "epa_source_county_label": "Anderson County",
    "county_or_equivalent_display": "Anderson County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Anderson County",
    "census_2025_geoid": "48001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Andrews, TX",
    "epa_source_county_label": "Andrews County",
    "county_or_equivalent_display": "Andrews County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Andrews County",
    "census_2025_geoid": "48003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Angelina, TX",
    "epa_source_county_label": "Angelina County",
    "county_or_equivalent_display": "Angelina County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Angelina County",
    "census_2025_geoid": "48005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Aransas, TX",
    "epa_source_county_label": "Aransas County",
    "county_or_equivalent_display": "Aransas County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Aransas County",
    "census_2025_geoid": "48007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Archer, TX",
    "epa_source_county_label": "Archer County",
    "county_or_equivalent_display": "Archer County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Archer County",
    "census_2025_geoid": "48009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Armstrong, TX",
    "epa_source_county_label": "Armstrong County",
    "county_or_equivalent_display": "Armstrong County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Armstrong County",
    "census_2025_geoid": "48011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Atascosa, TX",
    "epa_source_county_label": "Atascosa County",
    "county_or_equivalent_display": "Atascosa County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Atascosa County",
    "census_2025_geoid": "48013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Austin, TX",
    "epa_source_county_label": "Austin County",
    "county_or_equivalent_display": "Austin County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Austin County",
    "census_2025_geoid": "48015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bailey, TX",
    "epa_source_county_label": "Bailey County",
    "county_or_equivalent_display": "Bailey County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bailey County",
    "census_2025_geoid": "48017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bandera, TX",
    "epa_source_county_label": "Bandera County",
    "county_or_equivalent_display": "Bandera County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bandera County",
    "census_2025_geoid": "48019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bastrop, TX",
    "epa_source_county_label": "Bastrop County",
    "county_or_equivalent_display": "Bastrop County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bastrop County",
    "census_2025_geoid": "48021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Baylor, TX",
    "epa_source_county_label": "Baylor County",
    "county_or_equivalent_display": "Baylor County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Baylor County",
    "census_2025_geoid": "48023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bee, TX",
    "epa_source_county_label": "Bee County",
    "county_or_equivalent_display": "Bee County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bee County",
    "census_2025_geoid": "48025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bell, TX",
    "epa_source_county_label": "Bell County",
    "county_or_equivalent_display": "Bell County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bell County",
    "census_2025_geoid": "48027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bexar, TX",
    "epa_source_county_label": "Bexar County",
    "county_or_equivalent_display": "Bexar County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bexar County",
    "census_2025_geoid": "48029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Blanco, TX",
    "epa_source_county_label": "Blanco County",
    "county_or_equivalent_display": "Blanco County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Blanco County",
    "census_2025_geoid": "48031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Borden, TX",
    "epa_source_county_label": "Borden County",
    "county_or_equivalent_display": "Borden County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Borden County",
    "census_2025_geoid": "48033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bosque, TX",
    "epa_source_county_label": "Bosque County",
    "county_or_equivalent_display": "Bosque County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bosque County",
    "census_2025_geoid": "48035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bowie, TX",
    "epa_source_county_label": "Bowie County",
    "county_or_equivalent_display": "Bowie County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bowie County",
    "census_2025_geoid": "48037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Brazoria, TX",
    "epa_source_county_label": "Brazoria County",
    "county_or_equivalent_display": "Brazoria County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Brazoria County",
    "census_2025_geoid": "48039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Brazos, TX",
    "epa_source_county_label": "Brazos County",
    "county_or_equivalent_display": "Brazos County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Brazos County",
    "census_2025_geoid": "48041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Brewster, TX",
    "epa_source_county_label": "Brewster County",
    "county_or_equivalent_display": "Brewster County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Brewster County",
    "census_2025_geoid": "48043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Briscoe, TX",
    "epa_source_county_label": "Briscoe County",
    "county_or_equivalent_display": "Briscoe County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Briscoe County",
    "census_2025_geoid": "48045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Brooks, TX",
    "epa_source_county_label": "Brooks County",
    "county_or_equivalent_display": "Brooks County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Brooks County",
    "census_2025_geoid": "48047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Brown, TX",
    "epa_source_county_label": "Brown County",
    "county_or_equivalent_display": "Brown County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Brown County",
    "census_2025_geoid": "48049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Burleson, TX",
    "epa_source_county_label": "Burleson County",
    "county_or_equivalent_display": "Burleson County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Burleson County",
    "census_2025_geoid": "48051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Burnet, TX",
    "epa_source_county_label": "Burnet County",
    "county_or_equivalent_display": "Burnet County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Burnet County",
    "census_2025_geoid": "48053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Caldwell, TX",
    "epa_source_county_label": "Caldwell County",
    "county_or_equivalent_display": "Caldwell County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Caldwell County",
    "census_2025_geoid": "48055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Calhoun, TX",
    "epa_source_county_label": "Calhoun County",
    "county_or_equivalent_display": "Calhoun County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Calhoun County",
    "census_2025_geoid": "48057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Callahan, TX",
    "epa_source_county_label": "Callahan County",
    "county_or_equivalent_display": "Callahan County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Callahan County",
    "census_2025_geoid": "48059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cameron, TX",
    "epa_source_county_label": "Cameron County",
    "county_or_equivalent_display": "Cameron County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cameron County",
    "census_2025_geoid": "48061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Camp, TX",
    "epa_source_county_label": "Camp County",
    "county_or_equivalent_display": "Camp County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Camp County",
    "census_2025_geoid": "48063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Carson, TX",
    "epa_source_county_label": "Carson County",
    "county_or_equivalent_display": "Carson County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Carson County",
    "census_2025_geoid": "48065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cass, TX",
    "epa_source_county_label": "Cass County",
    "county_or_equivalent_display": "Cass County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cass County",
    "census_2025_geoid": "48067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Castro, TX",
    "epa_source_county_label": "Castro County",
    "county_or_equivalent_display": "Castro County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Castro County",
    "census_2025_geoid": "48069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chambers, TX",
    "epa_source_county_label": "Chambers County",
    "county_or_equivalent_display": "Chambers County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chambers County",
    "census_2025_geoid": "48071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cherokee, TX",
    "epa_source_county_label": "Cherokee County",
    "county_or_equivalent_display": "Cherokee County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cherokee County",
    "census_2025_geoid": "48073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Childress, TX",
    "epa_source_county_label": "Childress County",
    "county_or_equivalent_display": "Childress County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Childress County",
    "census_2025_geoid": "48075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clay, TX",
    "epa_source_county_label": "Clay County",
    "county_or_equivalent_display": "Clay County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clay County",
    "census_2025_geoid": "48077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cochran, TX",
    "epa_source_county_label": "Cochran County",
    "county_or_equivalent_display": "Cochran County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cochran County",
    "census_2025_geoid": "48079",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Coke, TX",
    "epa_source_county_label": "Coke County",
    "county_or_equivalent_display": "Coke County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Coke County",
    "census_2025_geoid": "48081",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Coleman, TX",
    "epa_source_county_label": "Coleman County",
    "county_or_equivalent_display": "Coleman County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Coleman County",
    "census_2025_geoid": "48083",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Collin, TX",
    "epa_source_county_label": "Collin County",
    "county_or_equivalent_display": "Collin County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Collin County",
    "census_2025_geoid": "48085",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Collingsworth, TX",
    "epa_source_county_label": "Collingsworth County",
    "county_or_equivalent_display": "Collingsworth County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Collingsworth County",
    "census_2025_geoid": "48087",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Colorado, TX",
    "epa_source_county_label": "Colorado County",
    "county_or_equivalent_display": "Colorado County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Colorado County",
    "census_2025_geoid": "48089",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Comal, TX",
    "epa_source_county_label": "Comal County",
    "county_or_equivalent_display": "Comal County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Comal County",
    "census_2025_geoid": "48091",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Comanche, TX",
    "epa_source_county_label": "Comanche County",
    "county_or_equivalent_display": "Comanche County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Comanche County",
    "census_2025_geoid": "48093",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Concho, TX",
    "epa_source_county_label": "Concho County",
    "county_or_equivalent_display": "Concho County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Concho County",
    "census_2025_geoid": "48095",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cooke, TX",
    "epa_source_county_label": "Cooke County",
    "county_or_equivalent_display": "Cooke County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cooke County",
    "census_2025_geoid": "48097",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Coryell, TX",
    "epa_source_county_label": "Coryell County",
    "county_or_equivalent_display": "Coryell County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Coryell County",
    "census_2025_geoid": "48099",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cottle, TX",
    "epa_source_county_label": "Cottle County",
    "county_or_equivalent_display": "Cottle County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cottle County",
    "census_2025_geoid": "48101",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Crane, TX",
    "epa_source_county_label": "Crane County",
    "county_or_equivalent_display": "Crane County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Crane County",
    "census_2025_geoid": "48103",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Crockett, TX",
    "epa_source_county_label": "Crockett County",
    "county_or_equivalent_display": "Crockett County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Crockett County",
    "census_2025_geoid": "48105",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Crosby, TX",
    "epa_source_county_label": "Crosby County",
    "county_or_equivalent_display": "Crosby County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Crosby County",
    "census_2025_geoid": "48107",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Culberson, TX",
    "epa_source_county_label": "Culberson County",
    "county_or_equivalent_display": "Culberson County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Culberson County",
    "census_2025_geoid": "48109",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dallam, TX",
    "epa_source_county_label": "Dallam County",
    "county_or_equivalent_display": "Dallam County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dallam County",
    "census_2025_geoid": "48111",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dallas, TX",
    "epa_source_county_label": "Dallas County",
    "county_or_equivalent_display": "Dallas County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dallas County",
    "census_2025_geoid": "48113",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dawson, TX",
    "epa_source_county_label": "Dawson County",
    "county_or_equivalent_display": "Dawson County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dawson County",
    "census_2025_geoid": "48115",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "De Witt, TX",
    "epa_source_county_label": "DeWitt County",
    "county_or_equivalent_display": "DeWitt County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "DeWitt County",
    "census_2025_geoid": "48123",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Deaf Smith, TX",
    "epa_source_county_label": "Deaf Smith County",
    "county_or_equivalent_display": "Deaf Smith County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Deaf Smith County",
    "census_2025_geoid": "48117",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Delta, TX",
    "epa_source_county_label": "Delta County",
    "county_or_equivalent_display": "Delta County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Delta County",
    "census_2025_geoid": "48119",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Denton, TX",
    "epa_source_county_label": "Denton County",
    "county_or_equivalent_display": "Denton County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Denton County",
    "census_2025_geoid": "48121",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dickens, TX",
    "epa_source_county_label": "Dickens County",
    "county_or_equivalent_display": "Dickens County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dickens County",
    "census_2025_geoid": "48125",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dimmit, TX",
    "epa_source_county_label": "Dimmit County",
    "county_or_equivalent_display": "Dimmit County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dimmit County",
    "census_2025_geoid": "48127",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Donley, TX",
    "epa_source_county_label": "Donley County",
    "county_or_equivalent_display": "Donley County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Donley County",
    "census_2025_geoid": "48129",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Duval, TX",
    "epa_source_county_label": "Duval County",
    "county_or_equivalent_display": "Duval County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Duval County",
    "census_2025_geoid": "48131",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Eastland, TX",
    "epa_source_county_label": "Eastland County",
    "county_or_equivalent_display": "Eastland County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Eastland County",
    "census_2025_geoid": "48133",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ector, TX",
    "epa_source_county_label": "Ector County",
    "county_or_equivalent_display": "Ector County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ector County",
    "census_2025_geoid": "48135",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Edwards, TX",
    "epa_source_county_label": "Edwards County",
    "county_or_equivalent_display": "Edwards County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Edwards County",
    "census_2025_geoid": "48137",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "El Paso, TX",
    "epa_source_county_label": "El Paso County",
    "county_or_equivalent_display": "El Paso County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "El Paso County",
    "census_2025_geoid": "48141",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ellis, TX",
    "epa_source_county_label": "Ellis County",
    "county_or_equivalent_display": "Ellis County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ellis County",
    "census_2025_geoid": "48139",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Erath, TX",
    "epa_source_county_label": "Erath County",
    "county_or_equivalent_display": "Erath County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Erath County",
    "census_2025_geoid": "48143",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Falls, TX",
    "epa_source_county_label": "Falls County",
    "county_or_equivalent_display": "Falls County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Falls County",
    "census_2025_geoid": "48145",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fannin, TX",
    "epa_source_county_label": "Fannin County",
    "county_or_equivalent_display": "Fannin County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fannin County",
    "census_2025_geoid": "48147",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fayette, TX",
    "epa_source_county_label": "Fayette County",
    "county_or_equivalent_display": "Fayette County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fayette County",
    "census_2025_geoid": "48149",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fisher, TX",
    "epa_source_county_label": "Fisher County",
    "county_or_equivalent_display": "Fisher County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fisher County",
    "census_2025_geoid": "48151",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Floyd, TX",
    "epa_source_county_label": "Floyd County",
    "county_or_equivalent_display": "Floyd County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Floyd County",
    "census_2025_geoid": "48153",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Foard, TX",
    "epa_source_county_label": "Foard County",
    "county_or_equivalent_display": "Foard County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Foard County",
    "census_2025_geoid": "48155",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fort Bend, TX",
    "epa_source_county_label": "Fort Bend County",
    "county_or_equivalent_display": "Fort Bend County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fort Bend County",
    "census_2025_geoid": "48157",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Franklin, TX",
    "epa_source_county_label": "Franklin County",
    "county_or_equivalent_display": "Franklin County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Franklin County",
    "census_2025_geoid": "48159",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Freestone, TX",
    "epa_source_county_label": "Freestone County",
    "county_or_equivalent_display": "Freestone County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Freestone County",
    "census_2025_geoid": "48161",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Frio, TX",
    "epa_source_county_label": "Frio County",
    "county_or_equivalent_display": "Frio County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Frio County",
    "census_2025_geoid": "48163",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gaines, TX",
    "epa_source_county_label": "Gaines County",
    "county_or_equivalent_display": "Gaines County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gaines County",
    "census_2025_geoid": "48165",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Galveston, TX",
    "epa_source_county_label": "Galveston County",
    "county_or_equivalent_display": "Galveston County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Galveston County",
    "census_2025_geoid": "48167",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Garza, TX",
    "epa_source_county_label": "Garza County",
    "county_or_equivalent_display": "Garza County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Garza County",
    "census_2025_geoid": "48169",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gillespie, TX",
    "epa_source_county_label": "Gillespie County",
    "county_or_equivalent_display": "Gillespie County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gillespie County",
    "census_2025_geoid": "48171",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Glasscock, TX",
    "epa_source_county_label": "Glasscock County",
    "county_or_equivalent_display": "Glasscock County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Glasscock County",
    "census_2025_geoid": "48173",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Goliad, TX",
    "epa_source_county_label": "Goliad County",
    "county_or_equivalent_display": "Goliad County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Goliad County",
    "census_2025_geoid": "48175",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gonzales, TX",
    "epa_source_county_label": "Gonzales County",
    "county_or_equivalent_display": "Gonzales County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gonzales County",
    "census_2025_geoid": "48177",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gray, TX",
    "epa_source_county_label": "Gray County",
    "county_or_equivalent_display": "Gray County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gray County",
    "census_2025_geoid": "48179",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grayson, TX",
    "epa_source_county_label": "Grayson County",
    "county_or_equivalent_display": "Grayson County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grayson County",
    "census_2025_geoid": "48181",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gregg, TX",
    "epa_source_county_label": "Gregg County",
    "county_or_equivalent_display": "Gregg County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gregg County",
    "census_2025_geoid": "48183",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grimes, TX",
    "epa_source_county_label": "Grimes County",
    "county_or_equivalent_display": "Grimes County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grimes County",
    "census_2025_geoid": "48185",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Guadalupe, TX",
    "epa_source_county_label": "Guadalupe County",
    "county_or_equivalent_display": "Guadalupe County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Guadalupe County",
    "census_2025_geoid": "48187",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hale, TX",
    "epa_source_county_label": "Hale County",
    "county_or_equivalent_display": "Hale County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hale County",
    "census_2025_geoid": "48189",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hall, TX",
    "epa_source_county_label": "Hall County",
    "county_or_equivalent_display": "Hall County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hall County",
    "census_2025_geoid": "48191",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hamilton, TX",
    "epa_source_county_label": "Hamilton County",
    "county_or_equivalent_display": "Hamilton County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hamilton County",
    "census_2025_geoid": "48193",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hansford, TX",
    "epa_source_county_label": "Hansford County",
    "county_or_equivalent_display": "Hansford County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hansford County",
    "census_2025_geoid": "48195",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hardeman, TX",
    "epa_source_county_label": "Hardeman County",
    "county_or_equivalent_display": "Hardeman County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hardeman County",
    "census_2025_geoid": "48197",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hardin, TX",
    "epa_source_county_label": "Hardin County",
    "county_or_equivalent_display": "Hardin County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hardin County",
    "census_2025_geoid": "48199",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Harris, TX",
    "epa_source_county_label": "Harris County",
    "county_or_equivalent_display": "Harris County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Harris County",
    "census_2025_geoid": "48201",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Harrison, TX",
    "epa_source_county_label": "Harrison County",
    "county_or_equivalent_display": "Harrison County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Harrison County",
    "census_2025_geoid": "48203",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hartley, TX",
    "epa_source_county_label": "Hartley County",
    "county_or_equivalent_display": "Hartley County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hartley County",
    "census_2025_geoid": "48205",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Haskell, TX",
    "epa_source_county_label": "Haskell County",
    "county_or_equivalent_display": "Haskell County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Haskell County",
    "census_2025_geoid": "48207",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hays, TX",
    "epa_source_county_label": "Hays County",
    "county_or_equivalent_display": "Hays County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hays County",
    "census_2025_geoid": "48209",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hemphill, TX",
    "epa_source_county_label": "Hemphill County",
    "county_or_equivalent_display": "Hemphill County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hemphill County",
    "census_2025_geoid": "48211",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Henderson, TX",
    "epa_source_county_label": "Henderson County",
    "county_or_equivalent_display": "Henderson County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Henderson County",
    "census_2025_geoid": "48213",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hidalgo, TX",
    "epa_source_county_label": "Hidalgo County",
    "county_or_equivalent_display": "Hidalgo County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hidalgo County",
    "census_2025_geoid": "48215",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hill, TX",
    "epa_source_county_label": "Hill County",
    "county_or_equivalent_display": "Hill County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hill County",
    "census_2025_geoid": "48217",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hockley, TX",
    "epa_source_county_label": "Hockley County",
    "county_or_equivalent_display": "Hockley County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hockley County",
    "census_2025_geoid": "48219",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hood, TX",
    "epa_source_county_label": "Hood County",
    "county_or_equivalent_display": "Hood County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hood County",
    "census_2025_geoid": "48221",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hopkins, TX",
    "epa_source_county_label": "Hopkins County",
    "county_or_equivalent_display": "Hopkins County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hopkins County",
    "census_2025_geoid": "48223",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Houston, TX",
    "epa_source_county_label": "Houston County",
    "county_or_equivalent_display": "Houston County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Houston County",
    "census_2025_geoid": "48225",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Howard, TX",
    "epa_source_county_label": "Howard County",
    "county_or_equivalent_display": "Howard County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Howard County",
    "census_2025_geoid": "48227",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hudspeth, TX",
    "epa_source_county_label": "Hudspeth County",
    "county_or_equivalent_display": "Hudspeth County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hudspeth County",
    "census_2025_geoid": "48229",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hunt, TX",
    "epa_source_county_label": "Hunt County",
    "county_or_equivalent_display": "Hunt County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hunt County",
    "census_2025_geoid": "48231",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hutchinson, TX",
    "epa_source_county_label": "Hutchinson County",
    "county_or_equivalent_display": "Hutchinson County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hutchinson County",
    "census_2025_geoid": "48233",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Irion, TX",
    "epa_source_county_label": "Irion County",
    "county_or_equivalent_display": "Irion County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Irion County",
    "census_2025_geoid": "48235",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jack, TX",
    "epa_source_county_label": "Jack County",
    "county_or_equivalent_display": "Jack County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jack County",
    "census_2025_geoid": "48237",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jackson, TX",
    "epa_source_county_label": "Jackson County",
    "county_or_equivalent_display": "Jackson County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jackson County",
    "census_2025_geoid": "48239",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jasper, TX",
    "epa_source_county_label": "Jasper County",
    "county_or_equivalent_display": "Jasper County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jasper County",
    "census_2025_geoid": "48241",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jeff Davis, TX",
    "epa_source_county_label": "Jeff Davis County",
    "county_or_equivalent_display": "Jeff Davis County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jeff Davis County",
    "census_2025_geoid": "48243",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jefferson, TX",
    "epa_source_county_label": "Jefferson County",
    "county_or_equivalent_display": "Jefferson County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jefferson County",
    "census_2025_geoid": "48245",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jim Hogg, TX",
    "epa_source_county_label": "Jim Hogg County",
    "county_or_equivalent_display": "Jim Hogg County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jim Hogg County",
    "census_2025_geoid": "48247",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jim Wells, TX",
    "epa_source_county_label": "Jim Wells County",
    "county_or_equivalent_display": "Jim Wells County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jim Wells County",
    "census_2025_geoid": "48249",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Johnson, TX",
    "epa_source_county_label": "Johnson County",
    "county_or_equivalent_display": "Johnson County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Johnson County",
    "census_2025_geoid": "48251",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jones, TX",
    "epa_source_county_label": "Jones County",
    "county_or_equivalent_display": "Jones County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jones County",
    "census_2025_geoid": "48253",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Karnes, TX",
    "epa_source_county_label": "Karnes County",
    "county_or_equivalent_display": "Karnes County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Karnes County",
    "census_2025_geoid": "48255",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kaufman, TX",
    "epa_source_county_label": "Kaufman County",
    "county_or_equivalent_display": "Kaufman County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kaufman County",
    "census_2025_geoid": "48257",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kendall, TX",
    "epa_source_county_label": "Kendall County",
    "county_or_equivalent_display": "Kendall County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kendall County",
    "census_2025_geoid": "48259",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kenedy, TX",
    "epa_source_county_label": "Kenedy County",
    "county_or_equivalent_display": "Kenedy County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kenedy County",
    "census_2025_geoid": "48261",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kent, TX",
    "epa_source_county_label": "Kent County",
    "county_or_equivalent_display": "Kent County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kent County",
    "census_2025_geoid": "48263",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kerr, TX",
    "epa_source_county_label": "Kerr County",
    "county_or_equivalent_display": "Kerr County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kerr County",
    "census_2025_geoid": "48265",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kimble, TX",
    "epa_source_county_label": "Kimble County",
    "county_or_equivalent_display": "Kimble County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kimble County",
    "census_2025_geoid": "48267",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "King, TX",
    "epa_source_county_label": "King County",
    "county_or_equivalent_display": "King County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "King County",
    "census_2025_geoid": "48269",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kinney, TX",
    "epa_source_county_label": "Kinney County",
    "county_or_equivalent_display": "Kinney County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kinney County",
    "census_2025_geoid": "48271",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kleberg, TX",
    "epa_source_county_label": "Kleberg County",
    "county_or_equivalent_display": "Kleberg County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kleberg County",
    "census_2025_geoid": "48273",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Knox, TX",
    "epa_source_county_label": "Knox County",
    "county_or_equivalent_display": "Knox County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Knox County",
    "census_2025_geoid": "48275",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "La Salle, TX",
    "epa_source_county_label": "La Salle County",
    "county_or_equivalent_display": "La Salle County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "La Salle County",
    "census_2025_geoid": "48283",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lamar, TX",
    "epa_source_county_label": "Lamar County",
    "county_or_equivalent_display": "Lamar County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lamar County",
    "census_2025_geoid": "48277",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lamb, TX",
    "epa_source_county_label": "Lamb County",
    "county_or_equivalent_display": "Lamb County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lamb County",
    "census_2025_geoid": "48279",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lampasas, TX",
    "epa_source_county_label": "Lampasas County",
    "county_or_equivalent_display": "Lampasas County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lampasas County",
    "census_2025_geoid": "48281",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lavaca, TX",
    "epa_source_county_label": "Lavaca County",
    "county_or_equivalent_display": "Lavaca County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lavaca County",
    "census_2025_geoid": "48285",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lee, TX",
    "epa_source_county_label": "Lee County",
    "county_or_equivalent_display": "Lee County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lee County",
    "census_2025_geoid": "48287",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Leon, TX",
    "epa_source_county_label": "Leon County",
    "county_or_equivalent_display": "Leon County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Leon County",
    "census_2025_geoid": "48289",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Liberty, TX",
    "epa_source_county_label": "Liberty County",
    "county_or_equivalent_display": "Liberty County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Liberty County",
    "census_2025_geoid": "48291",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Limestone, TX",
    "epa_source_county_label": "Limestone County",
    "county_or_equivalent_display": "Limestone County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Limestone County",
    "census_2025_geoid": "48293",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lipscomb, TX",
    "epa_source_county_label": "Lipscomb County",
    "county_or_equivalent_display": "Lipscomb County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lipscomb County",
    "census_2025_geoid": "48295",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Live Oak, TX",
    "epa_source_county_label": "Live Oak County",
    "county_or_equivalent_display": "Live Oak County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Live Oak County",
    "census_2025_geoid": "48297",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Llano, TX",
    "epa_source_county_label": "Llano County",
    "county_or_equivalent_display": "Llano County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Llano County",
    "census_2025_geoid": "48299",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Loving, TX",
    "epa_source_county_label": "Loving County",
    "county_or_equivalent_display": "Loving County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Loving County",
    "census_2025_geoid": "48301",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lubbock, TX",
    "epa_source_county_label": "Lubbock County",
    "county_or_equivalent_display": "Lubbock County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lubbock County",
    "census_2025_geoid": "48303",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lynn, TX",
    "epa_source_county_label": "Lynn County",
    "county_or_equivalent_display": "Lynn County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lynn County",
    "census_2025_geoid": "48305",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Madison, TX",
    "epa_source_county_label": "Madison County",
    "county_or_equivalent_display": "Madison County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Madison County",
    "census_2025_geoid": "48313",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marion, TX",
    "epa_source_county_label": "Marion County",
    "county_or_equivalent_display": "Marion County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marion County",
    "census_2025_geoid": "48315",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Martin, TX",
    "epa_source_county_label": "Martin County",
    "county_or_equivalent_display": "Martin County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Martin County",
    "census_2025_geoid": "48317",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mason, TX",
    "epa_source_county_label": "Mason County",
    "county_or_equivalent_display": "Mason County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mason County",
    "census_2025_geoid": "48319",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Matagorda, TX",
    "epa_source_county_label": "Matagorda County",
    "county_or_equivalent_display": "Matagorda County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Matagorda County",
    "census_2025_geoid": "48321",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Maverick, TX",
    "epa_source_county_label": "Maverick County",
    "county_or_equivalent_display": "Maverick County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Maverick County",
    "census_2025_geoid": "48323",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "McCulloch, TX",
    "epa_source_county_label": "McCulloch County",
    "county_or_equivalent_display": "McCulloch County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "McCulloch County",
    "census_2025_geoid": "48307",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "McLennan, TX",
    "epa_source_county_label": "McLennan County",
    "county_or_equivalent_display": "McLennan County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "McLennan County",
    "census_2025_geoid": "48309",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "McMullen, TX",
    "epa_source_county_label": "McMullen County",
    "county_or_equivalent_display": "McMullen County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "McMullen County",
    "census_2025_geoid": "48311",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Medina, TX",
    "epa_source_county_label": "Medina County",
    "county_or_equivalent_display": "Medina County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Medina County",
    "census_2025_geoid": "48325",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Menard, TX",
    "epa_source_county_label": "Menard County",
    "county_or_equivalent_display": "Menard County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Menard County",
    "census_2025_geoid": "48327",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Midland, TX",
    "epa_source_county_label": "Midland County",
    "county_or_equivalent_display": "Midland County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Midland County",
    "census_2025_geoid": "48329",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Milam, TX",
    "epa_source_county_label": "Milam County",
    "county_or_equivalent_display": "Milam County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Milam County",
    "census_2025_geoid": "48331",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mills, TX",
    "epa_source_county_label": "Mills County",
    "county_or_equivalent_display": "Mills County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mills County",
    "census_2025_geoid": "48333",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mitchell, TX",
    "epa_source_county_label": "Mitchell County",
    "county_or_equivalent_display": "Mitchell County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mitchell County",
    "census_2025_geoid": "48335",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Montague, TX",
    "epa_source_county_label": "Montague County",
    "county_or_equivalent_display": "Montague County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Montague County",
    "census_2025_geoid": "48337",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Montgomery, TX",
    "epa_source_county_label": "Montgomery County",
    "county_or_equivalent_display": "Montgomery County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Montgomery County",
    "census_2025_geoid": "48339",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Moore, TX",
    "epa_source_county_label": "Moore County",
    "county_or_equivalent_display": "Moore County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Moore County",
    "census_2025_geoid": "48341",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Morris, TX",
    "epa_source_county_label": "Morris County",
    "county_or_equivalent_display": "Morris County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Morris County",
    "census_2025_geoid": "48343",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Motley, TX",
    "epa_source_county_label": "Motley County",
    "county_or_equivalent_display": "Motley County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Motley County",
    "census_2025_geoid": "48345",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Nacogdoches, TX",
    "epa_source_county_label": "Nacogdoches County",
    "county_or_equivalent_display": "Nacogdoches County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Nacogdoches County",
    "census_2025_geoid": "48347",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Navarro, TX",
    "epa_source_county_label": "Navarro County",
    "county_or_equivalent_display": "Navarro County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Navarro County",
    "census_2025_geoid": "48349",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Newton, TX",
    "epa_source_county_label": "Newton County",
    "county_or_equivalent_display": "Newton County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Newton County",
    "census_2025_geoid": "48351",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Nolan, TX",
    "epa_source_county_label": "Nolan County",
    "county_or_equivalent_display": "Nolan County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Nolan County",
    "census_2025_geoid": "48353",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Nueces, TX",
    "epa_source_county_label": "Nueces County",
    "county_or_equivalent_display": "Nueces County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Nueces County",
    "census_2025_geoid": "48355",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ochiltree, TX",
    "epa_source_county_label": "Ochiltree County",
    "county_or_equivalent_display": "Ochiltree County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ochiltree County",
    "census_2025_geoid": "48357",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Oldham, TX",
    "epa_source_county_label": "Oldham County",
    "county_or_equivalent_display": "Oldham County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Oldham County",
    "census_2025_geoid": "48359",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Orange, TX",
    "epa_source_county_label": "Orange County",
    "county_or_equivalent_display": "Orange County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Orange County",
    "census_2025_geoid": "48361",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Palo Pinto, TX",
    "epa_source_county_label": "Palo Pinto County",
    "county_or_equivalent_display": "Palo Pinto County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Palo Pinto County",
    "census_2025_geoid": "48363",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Panola, TX",
    "epa_source_county_label": "Panola County",
    "county_or_equivalent_display": "Panola County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Panola County",
    "census_2025_geoid": "48365",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Parker, TX",
    "epa_source_county_label": "Parker County",
    "county_or_equivalent_display": "Parker County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Parker County",
    "census_2025_geoid": "48367",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Parmer, TX",
    "epa_source_county_label": "Parmer County",
    "county_or_equivalent_display": "Parmer County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Parmer County",
    "census_2025_geoid": "48369",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pecos, TX",
    "epa_source_county_label": "Pecos County",
    "county_or_equivalent_display": "Pecos County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pecos County",
    "census_2025_geoid": "48371",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Polk, TX",
    "epa_source_county_label": "Polk County",
    "county_or_equivalent_display": "Polk County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Polk County",
    "census_2025_geoid": "48373",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Potter, TX",
    "epa_source_county_label": "Potter County",
    "county_or_equivalent_display": "Potter County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Potter County",
    "census_2025_geoid": "48375",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Presidio, TX",
    "epa_source_county_label": "Presidio County",
    "county_or_equivalent_display": "Presidio County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Presidio County",
    "census_2025_geoid": "48377",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rains, TX",
    "epa_source_county_label": "Rains County",
    "county_or_equivalent_display": "Rains County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rains County",
    "census_2025_geoid": "48379",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Randall, TX",
    "epa_source_county_label": "Randall County",
    "county_or_equivalent_display": "Randall County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Randall County",
    "census_2025_geoid": "48381",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Reagan, TX",
    "epa_source_county_label": "Reagan County",
    "county_or_equivalent_display": "Reagan County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Reagan County",
    "census_2025_geoid": "48383",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Real, TX",
    "epa_source_county_label": "Real County",
    "county_or_equivalent_display": "Real County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Real County",
    "census_2025_geoid": "48385",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Red River, TX",
    "epa_source_county_label": "Red River County",
    "county_or_equivalent_display": "Red River County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Red River County",
    "census_2025_geoid": "48387",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Reeves, TX",
    "epa_source_county_label": "Reeves County",
    "county_or_equivalent_display": "Reeves County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Reeves County",
    "census_2025_geoid": "48389",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Refugio, TX",
    "epa_source_county_label": "Refugio County",
    "county_or_equivalent_display": "Refugio County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Refugio County",
    "census_2025_geoid": "48391",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Roberts, TX",
    "epa_source_county_label": "Roberts County",
    "county_or_equivalent_display": "Roberts County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Roberts County",
    "census_2025_geoid": "48393",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Robertson, TX",
    "epa_source_county_label": "Robertson County",
    "county_or_equivalent_display": "Robertson County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Robertson County",
    "census_2025_geoid": "48395",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rockwall, TX",
    "epa_source_county_label": "Rockwall County",
    "county_or_equivalent_display": "Rockwall County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rockwall County",
    "census_2025_geoid": "48397",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Runnels, TX",
    "epa_source_county_label": "Runnels County",
    "county_or_equivalent_display": "Runnels County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Runnels County",
    "census_2025_geoid": "48399",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rusk, TX",
    "epa_source_county_label": "Rusk County",
    "county_or_equivalent_display": "Rusk County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rusk County",
    "census_2025_geoid": "48401",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sabine, TX",
    "epa_source_county_label": "Sabine County",
    "county_or_equivalent_display": "Sabine County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sabine County",
    "census_2025_geoid": "48403",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "San Augustine, TX",
    "epa_source_county_label": "San Augustine County",
    "county_or_equivalent_display": "San Augustine County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "San Augustine County",
    "census_2025_geoid": "48405",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "San Jacinto, TX",
    "epa_source_county_label": "San Jacinto County",
    "county_or_equivalent_display": "San Jacinto County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "San Jacinto County",
    "census_2025_geoid": "48407",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "San Patricio, TX",
    "epa_source_county_label": "San Patricio County",
    "county_or_equivalent_display": "San Patricio County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "San Patricio County",
    "census_2025_geoid": "48409",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "San Saba, TX",
    "epa_source_county_label": "San Saba County",
    "county_or_equivalent_display": "San Saba County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "San Saba County",
    "census_2025_geoid": "48411",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Schleicher, TX",
    "epa_source_county_label": "Schleicher County",
    "county_or_equivalent_display": "Schleicher County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Schleicher County",
    "census_2025_geoid": "48413",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Scurry, TX",
    "epa_source_county_label": "Scurry County",
    "county_or_equivalent_display": "Scurry County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Scurry County",
    "census_2025_geoid": "48415",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Shackelford, TX",
    "epa_source_county_label": "Shackelford County",
    "county_or_equivalent_display": "Shackelford County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Shackelford County",
    "census_2025_geoid": "48417",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Shelby, TX",
    "epa_source_county_label": "Shelby County",
    "county_or_equivalent_display": "Shelby County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Shelby County",
    "census_2025_geoid": "48419",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sherman, TX",
    "epa_source_county_label": "Sherman County",
    "county_or_equivalent_display": "Sherman County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sherman County",
    "census_2025_geoid": "48421",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Smith, TX",
    "epa_source_county_label": "Smith County",
    "county_or_equivalent_display": "Smith County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Smith County",
    "census_2025_geoid": "48423",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Somervell, TX",
    "epa_source_county_label": "Somervell County",
    "county_or_equivalent_display": "Somervell County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Somervell County",
    "census_2025_geoid": "48425",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Starr, TX",
    "epa_source_county_label": "Starr County",
    "county_or_equivalent_display": "Starr County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Starr County",
    "census_2025_geoid": "48427",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Stephens, TX",
    "epa_source_county_label": "Stephens County",
    "county_or_equivalent_display": "Stephens County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Stephens County",
    "census_2025_geoid": "48429",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sterling, TX",
    "epa_source_county_label": "Sterling County",
    "county_or_equivalent_display": "Sterling County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sterling County",
    "census_2025_geoid": "48431",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Stonewall, TX",
    "epa_source_county_label": "Stonewall County",
    "county_or_equivalent_display": "Stonewall County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Stonewall County",
    "census_2025_geoid": "48433",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sutton, TX",
    "epa_source_county_label": "Sutton County",
    "county_or_equivalent_display": "Sutton County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sutton County",
    "census_2025_geoid": "48435",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Swisher, TX",
    "epa_source_county_label": "Swisher County",
    "county_or_equivalent_display": "Swisher County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Swisher County",
    "census_2025_geoid": "48437",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tarrant, TX",
    "epa_source_county_label": "Tarrant County",
    "county_or_equivalent_display": "Tarrant County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tarrant County",
    "census_2025_geoid": "48439",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Taylor, TX",
    "epa_source_county_label": "Taylor County",
    "county_or_equivalent_display": "Taylor County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Taylor County",
    "census_2025_geoid": "48441",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Terrell, TX",
    "epa_source_county_label": "Terrell County",
    "county_or_equivalent_display": "Terrell County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Terrell County",
    "census_2025_geoid": "48443",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Terry, TX",
    "epa_source_county_label": "Terry County",
    "county_or_equivalent_display": "Terry County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Terry County",
    "census_2025_geoid": "48445",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Throckmorton, TX",
    "epa_source_county_label": "Throckmorton County",
    "county_or_equivalent_display": "Throckmorton County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Throckmorton County",
    "census_2025_geoid": "48447",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Titus, TX",
    "epa_source_county_label": "Titus County",
    "county_or_equivalent_display": "Titus County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Titus County",
    "census_2025_geoid": "48449",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tom Green, TX",
    "epa_source_county_label": "Tom Green County",
    "county_or_equivalent_display": "Tom Green County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tom Green County",
    "census_2025_geoid": "48451",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Travis, TX",
    "epa_source_county_label": "Travis County",
    "county_or_equivalent_display": "Travis County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Travis County",
    "census_2025_geoid": "48453",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Trinity, TX",
    "epa_source_county_label": "Trinity County",
    "county_or_equivalent_display": "Trinity County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Trinity County",
    "census_2025_geoid": "48455",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tyler, TX",
    "epa_source_county_label": "Tyler County",
    "county_or_equivalent_display": "Tyler County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tyler County",
    "census_2025_geoid": "48457",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Upshur, TX",
    "epa_source_county_label": "Upshur County",
    "county_or_equivalent_display": "Upshur County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Upshur County",
    "census_2025_geoid": "48459",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Upton, TX",
    "epa_source_county_label": "Upton County",
    "county_or_equivalent_display": "Upton County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Upton County",
    "census_2025_geoid": "48461",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Uvalde, TX",
    "epa_source_county_label": "Uvalde County",
    "county_or_equivalent_display": "Uvalde County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Uvalde County",
    "census_2025_geoid": "48463",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Val Verde, TX",
    "epa_source_county_label": "Val Verde County",
    "county_or_equivalent_display": "Val Verde County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Val Verde County",
    "census_2025_geoid": "48465",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Van Zandt, TX",
    "epa_source_county_label": "Van Zandt County",
    "county_or_equivalent_display": "Van Zandt County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Van Zandt County",
    "census_2025_geoid": "48467",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Victoria, TX",
    "epa_source_county_label": "Victoria County",
    "county_or_equivalent_display": "Victoria County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Victoria County",
    "census_2025_geoid": "48469",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Walker, TX",
    "epa_source_county_label": "Walker County",
    "county_or_equivalent_display": "Walker County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Walker County",
    "census_2025_geoid": "48471",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Waller, TX",
    "epa_source_county_label": "Waller County",
    "county_or_equivalent_display": "Waller County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Waller County",
    "census_2025_geoid": "48473",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ward, TX",
    "epa_source_county_label": "Ward County",
    "county_or_equivalent_display": "Ward County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ward County",
    "census_2025_geoid": "48475",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washington, TX",
    "epa_source_county_label": "Washington County",
    "county_or_equivalent_display": "Washington County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washington County",
    "census_2025_geoid": "48477",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Webb, TX",
    "epa_source_county_label": "Webb County",
    "county_or_equivalent_display": "Webb County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Webb County",
    "census_2025_geoid": "48479",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wharton, TX",
    "epa_source_county_label": "Wharton County",
    "county_or_equivalent_display": "Wharton County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wharton County",
    "census_2025_geoid": "48481",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wheeler, TX",
    "epa_source_county_label": "Wheeler County",
    "county_or_equivalent_display": "Wheeler County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wheeler County",
    "census_2025_geoid": "48483",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wichita, TX",
    "epa_source_county_label": "Wichita County",
    "county_or_equivalent_display": "Wichita County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wichita County",
    "census_2025_geoid": "48485",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wilbarger, TX",
    "epa_source_county_label": "Wilbarger County",
    "county_or_equivalent_display": "Wilbarger County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wilbarger County",
    "census_2025_geoid": "48487",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Willacy, TX",
    "epa_source_county_label": "Willacy County",
    "county_or_equivalent_display": "Willacy County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Willacy County",
    "census_2025_geoid": "48489",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Williamson, TX",
    "epa_source_county_label": "Williamson County",
    "county_or_equivalent_display": "Williamson County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Williamson County",
    "census_2025_geoid": "48491",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wilson, TX",
    "epa_source_county_label": "Wilson County",
    "county_or_equivalent_display": "Wilson County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wilson County",
    "census_2025_geoid": "48493",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Winkler, TX",
    "epa_source_county_label": "Winkler County",
    "county_or_equivalent_display": "Winkler County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Winkler County",
    "census_2025_geoid": "48495",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wise, TX",
    "epa_source_county_label": "Wise County",
    "county_or_equivalent_display": "Wise County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wise County",
    "census_2025_geoid": "48497",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wood, TX",
    "epa_source_county_label": "Wood County",
    "county_or_equivalent_display": "Wood County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wood County",
    "census_2025_geoid": "48499",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Yoakum, TX",
    "epa_source_county_label": "Yoakum County",
    "county_or_equivalent_display": "Yoakum County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Yoakum County",
    "census_2025_geoid": "48501",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Young, TX",
    "epa_source_county_label": "Young County",
    "county_or_equivalent_display": "Young County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Young County",
    "census_2025_geoid": "48503",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Zapata, TX",
    "epa_source_county_label": "Zapata County",
    "county_or_equivalent_display": "Zapata County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Zapata County",
    "census_2025_geoid": "48505",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Zavala, TX",
    "epa_source_county_label": "Zavala County",
    "county_or_equivalent_display": "Zavala County",
    "state_name": "Texas",
    "state_abbreviation": "TX",
    "geography_type": "county",
    "epa_region_source_value": "6",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Zavala County",
    "census_2025_geoid": "48507",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Beaver, UT",
    "epa_source_county_label": "Beaver County",
    "county_or_equivalent_display": "Beaver County",
    "state_name": "Utah",
    "state_abbreviation": "UT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Beaver County",
    "census_2025_geoid": "49001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Box Elder, UT",
    "epa_source_county_label": "Box Elder County",
    "county_or_equivalent_display": "Box Elder County",
    "state_name": "Utah",
    "state_abbreviation": "UT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Box Elder County",
    "census_2025_geoid": "49003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cache, UT",
    "epa_source_county_label": "Cache County",
    "county_or_equivalent_display": "Cache County",
    "state_name": "Utah",
    "state_abbreviation": "UT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cache County",
    "census_2025_geoid": "49005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Carbon, UT",
    "epa_source_county_label": "Carbon County",
    "county_or_equivalent_display": "Carbon County",
    "state_name": "Utah",
    "state_abbreviation": "UT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Carbon County",
    "census_2025_geoid": "49007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Daggett, UT",
    "epa_source_county_label": "Daggett County",
    "county_or_equivalent_display": "Daggett County",
    "state_name": "Utah",
    "state_abbreviation": "UT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Daggett County",
    "census_2025_geoid": "49009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Davis, UT",
    "epa_source_county_label": "Davis County",
    "county_or_equivalent_display": "Davis County",
    "state_name": "Utah",
    "state_abbreviation": "UT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Davis County",
    "census_2025_geoid": "49011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Duchesne, UT",
    "epa_source_county_label": "Duchesne County",
    "county_or_equivalent_display": "Duchesne County",
    "state_name": "Utah",
    "state_abbreviation": "UT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Duchesne County",
    "census_2025_geoid": "49013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Emery, UT",
    "epa_source_county_label": "Emery County",
    "county_or_equivalent_display": "Emery County",
    "state_name": "Utah",
    "state_abbreviation": "UT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Emery County",
    "census_2025_geoid": "49015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Garfield, UT",
    "epa_source_county_label": "Garfield County",
    "county_or_equivalent_display": "Garfield County",
    "state_name": "Utah",
    "state_abbreviation": "UT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Garfield County",
    "census_2025_geoid": "49017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grand, UT",
    "epa_source_county_label": "Grand County",
    "county_or_equivalent_display": "Grand County",
    "state_name": "Utah",
    "state_abbreviation": "UT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grand County",
    "census_2025_geoid": "49019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Iron, UT",
    "epa_source_county_label": "Iron County",
    "county_or_equivalent_display": "Iron County",
    "state_name": "Utah",
    "state_abbreviation": "UT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Iron County",
    "census_2025_geoid": "49021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Juab, UT",
    "epa_source_county_label": "Juab County",
    "county_or_equivalent_display": "Juab County",
    "state_name": "Utah",
    "state_abbreviation": "UT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Juab County",
    "census_2025_geoid": "49023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kane, UT",
    "epa_source_county_label": "Kane County",
    "county_or_equivalent_display": "Kane County",
    "state_name": "Utah",
    "state_abbreviation": "UT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kane County",
    "census_2025_geoid": "49025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Millard, UT",
    "epa_source_county_label": "Millard County",
    "county_or_equivalent_display": "Millard County",
    "state_name": "Utah",
    "state_abbreviation": "UT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Millard County",
    "census_2025_geoid": "49027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Morgan, UT",
    "epa_source_county_label": "Morgan County",
    "county_or_equivalent_display": "Morgan County",
    "state_name": "Utah",
    "state_abbreviation": "UT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Morgan County",
    "census_2025_geoid": "49029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Piute, UT",
    "epa_source_county_label": "Piute County",
    "county_or_equivalent_display": "Piute County",
    "state_name": "Utah",
    "state_abbreviation": "UT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Piute County",
    "census_2025_geoid": "49031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rich, UT",
    "epa_source_county_label": "Rich County",
    "county_or_equivalent_display": "Rich County",
    "state_name": "Utah",
    "state_abbreviation": "UT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rich County",
    "census_2025_geoid": "49033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Salt Lake, UT",
    "epa_source_county_label": "Salt Lake County",
    "county_or_equivalent_display": "Salt Lake County",
    "state_name": "Utah",
    "state_abbreviation": "UT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Salt Lake County",
    "census_2025_geoid": "49035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "San Juan, UT",
    "epa_source_county_label": "San Juan County",
    "county_or_equivalent_display": "San Juan County",
    "state_name": "Utah",
    "state_abbreviation": "UT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "San Juan County",
    "census_2025_geoid": "49037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sanpete, UT",
    "epa_source_county_label": "Sanpete County",
    "county_or_equivalent_display": "Sanpete County",
    "state_name": "Utah",
    "state_abbreviation": "UT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sanpete County",
    "census_2025_geoid": "49039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sevier, UT",
    "epa_source_county_label": "Sevier County",
    "county_or_equivalent_display": "Sevier County",
    "state_name": "Utah",
    "state_abbreviation": "UT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sevier County",
    "census_2025_geoid": "49041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Summit, UT",
    "epa_source_county_label": "Summit County",
    "county_or_equivalent_display": "Summit County",
    "state_name": "Utah",
    "state_abbreviation": "UT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Summit County",
    "census_2025_geoid": "49043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tooele, UT",
    "epa_source_county_label": "Tooele County",
    "county_or_equivalent_display": "Tooele County",
    "state_name": "Utah",
    "state_abbreviation": "UT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tooele County",
    "census_2025_geoid": "49045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Uintah, UT",
    "epa_source_county_label": "Uintah County",
    "county_or_equivalent_display": "Uintah County",
    "state_name": "Utah",
    "state_abbreviation": "UT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Uintah County",
    "census_2025_geoid": "49047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Utah, UT",
    "epa_source_county_label": "Utah County",
    "county_or_equivalent_display": "Utah County",
    "state_name": "Utah",
    "state_abbreviation": "UT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Utah County",
    "census_2025_geoid": "49049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wasatch, UT",
    "epa_source_county_label": "Wasatch County",
    "county_or_equivalent_display": "Wasatch County",
    "state_name": "Utah",
    "state_abbreviation": "UT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wasatch County",
    "census_2025_geoid": "49051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washington, UT",
    "epa_source_county_label": "Washington County",
    "county_or_equivalent_display": "Washington County",
    "state_name": "Utah",
    "state_abbreviation": "UT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washington County",
    "census_2025_geoid": "49053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wayne, UT",
    "epa_source_county_label": "Wayne County",
    "county_or_equivalent_display": "Wayne County",
    "state_name": "Utah",
    "state_abbreviation": "UT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wayne County",
    "census_2025_geoid": "49055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Weber, UT",
    "epa_source_county_label": "Weber County",
    "county_or_equivalent_display": "Weber County",
    "state_name": "Utah",
    "state_abbreviation": "UT",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Weber County",
    "census_2025_geoid": "49057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Addison, VT",
    "epa_source_county_label": "Addison County",
    "county_or_equivalent_display": "Addison County",
    "state_name": "Vermont",
    "state_abbreviation": "VT",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Addison County",
    "census_2025_geoid": "50001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bennington, VT",
    "epa_source_county_label": "Bennington County",
    "county_or_equivalent_display": "Bennington County",
    "state_name": "Vermont",
    "state_abbreviation": "VT",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bennington County",
    "census_2025_geoid": "50003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Caledonia, VT",
    "epa_source_county_label": "Caledonia County",
    "county_or_equivalent_display": "Caledonia County",
    "state_name": "Vermont",
    "state_abbreviation": "VT",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Caledonia County",
    "census_2025_geoid": "50005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chittenden, VT",
    "epa_source_county_label": "Chittenden County",
    "county_or_equivalent_display": "Chittenden County",
    "state_name": "Vermont",
    "state_abbreviation": "VT",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chittenden County",
    "census_2025_geoid": "50007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Essex, VT",
    "epa_source_county_label": "Essex County",
    "county_or_equivalent_display": "Essex County",
    "state_name": "Vermont",
    "state_abbreviation": "VT",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Essex County",
    "census_2025_geoid": "50009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Franklin, VT",
    "epa_source_county_label": "Franklin County",
    "county_or_equivalent_display": "Franklin County",
    "state_name": "Vermont",
    "state_abbreviation": "VT",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Franklin County",
    "census_2025_geoid": "50011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grand Isle, VT",
    "epa_source_county_label": "Grand Isle County",
    "county_or_equivalent_display": "Grand Isle County",
    "state_name": "Vermont",
    "state_abbreviation": "VT",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grand Isle County",
    "census_2025_geoid": "50013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lamoille, VT",
    "epa_source_county_label": "Lamoille County",
    "county_or_equivalent_display": "Lamoille County",
    "state_name": "Vermont",
    "state_abbreviation": "VT",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lamoille County",
    "census_2025_geoid": "50015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Orange, VT",
    "epa_source_county_label": "Orange County",
    "county_or_equivalent_display": "Orange County",
    "state_name": "Vermont",
    "state_abbreviation": "VT",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Orange County",
    "census_2025_geoid": "50017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Orleans, VT",
    "epa_source_county_label": "Orleans County",
    "county_or_equivalent_display": "Orleans County",
    "state_name": "Vermont",
    "state_abbreviation": "VT",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Orleans County",
    "census_2025_geoid": "50019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rutland, VT",
    "epa_source_county_label": "Rutland County",
    "county_or_equivalent_display": "Rutland County",
    "state_name": "Vermont",
    "state_abbreviation": "VT",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rutland County",
    "census_2025_geoid": "50021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washington, VT",
    "epa_source_county_label": "Washington County",
    "county_or_equivalent_display": "Washington County",
    "state_name": "Vermont",
    "state_abbreviation": "VT",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washington County",
    "census_2025_geoid": "50023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Windham, VT",
    "epa_source_county_label": "Windham County",
    "county_or_equivalent_display": "Windham County",
    "state_name": "Vermont",
    "state_abbreviation": "VT",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Windham County",
    "census_2025_geoid": "50025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Windsor, VT",
    "epa_source_county_label": "Windsor County",
    "county_or_equivalent_display": "Windsor County",
    "state_name": "Vermont",
    "state_abbreviation": "VT",
    "geography_type": "county",
    "epa_region_source_value": "1",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Windsor County",
    "census_2025_geoid": "50027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Accomack, VA",
    "epa_source_county_label": "Accomack County",
    "county_or_equivalent_display": "Accomack County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Accomack County",
    "census_2025_geoid": "51001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Albemarle, VA",
    "epa_source_county_label": "Albemarle County",
    "county_or_equivalent_display": "Albemarle County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Albemarle County",
    "census_2025_geoid": "51003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Alexandria, VA",
    "epa_source_county_label": "Alexandria, VA",
    "county_or_equivalent_display": "Alexandria city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Alexandria city",
    "census_2025_geoid": "51510",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Alleghany, VA",
    "epa_source_county_label": "Alleghany County",
    "county_or_equivalent_display": "Alleghany County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Alleghany County",
    "census_2025_geoid": "51005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Amelia, VA",
    "epa_source_county_label": "Amelia County",
    "county_or_equivalent_display": "Amelia County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Amelia County",
    "census_2025_geoid": "51007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Amherst, VA",
    "epa_source_county_label": "Amherst County",
    "county_or_equivalent_display": "Amherst County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Amherst County",
    "census_2025_geoid": "51009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Appomattox, VA",
    "epa_source_county_label": "Appomattox County",
    "county_or_equivalent_display": "Appomattox County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Appomattox County",
    "census_2025_geoid": "51011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Arlington, VA",
    "epa_source_county_label": "Arlington County",
    "county_or_equivalent_display": "Arlington County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Arlington County",
    "census_2025_geoid": "51013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Augusta, VA",
    "epa_source_county_label": "Augusta County",
    "county_or_equivalent_display": "Augusta County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Augusta County",
    "census_2025_geoid": "51015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bath, VA",
    "epa_source_county_label": "Bath County",
    "county_or_equivalent_display": "Bath County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bath County",
    "census_2025_geoid": "51017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bedford, VA",
    "epa_source_county_label": "Bedford County",
    "county_or_equivalent_display": "Bedford County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bedford County",
    "census_2025_geoid": "51019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bedford, VA",
    "epa_source_county_label": "Bedford, VA",
    "county_or_equivalent_display": "Bedford city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "legacy_or_unmatched",
    "census_2025_county_or_equivalent_name": "",
    "census_2025_geoid": "",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; current Census geography match intentionally left unresolved.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "EPA source geography has no direct name match in the 2025 Census file; no current GEOID was assigned and no zone was silently reallocated."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bland, VA",
    "epa_source_county_label": "Bland County",
    "county_or_equivalent_display": "Bland County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bland County",
    "census_2025_geoid": "51021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Botetourt, VA",
    "epa_source_county_label": "Botetourt County",
    "county_or_equivalent_display": "Botetourt County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Botetourt County",
    "census_2025_geoid": "51023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bristol, VA",
    "epa_source_county_label": "Bristol, VA",
    "county_or_equivalent_display": "Bristol city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bristol city",
    "census_2025_geoid": "51520",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Brunswick, VA",
    "epa_source_county_label": "Brunswick County",
    "county_or_equivalent_display": "Brunswick County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Brunswick County",
    "census_2025_geoid": "51025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Buchanan, VA",
    "epa_source_county_label": "Buchanan County",
    "county_or_equivalent_display": "Buchanan County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Buchanan County",
    "census_2025_geoid": "51027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Buckingham, VA",
    "epa_source_county_label": "Buckingham County",
    "county_or_equivalent_display": "Buckingham County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Buckingham County",
    "census_2025_geoid": "51029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Buena Vista, VA",
    "epa_source_county_label": "Buena Vista, VA",
    "county_or_equivalent_display": "Buena Vista city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Buena Vista city",
    "census_2025_geoid": "51530",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Campbell, VA",
    "epa_source_county_label": "Campbell County",
    "county_or_equivalent_display": "Campbell County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Campbell County",
    "census_2025_geoid": "51031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Caroline, VA",
    "epa_source_county_label": "Caroline County",
    "county_or_equivalent_display": "Caroline County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Caroline County",
    "census_2025_geoid": "51033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Carroll, VA",
    "epa_source_county_label": "Carroll County",
    "county_or_equivalent_display": "Carroll County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Carroll County",
    "census_2025_geoid": "51035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Charles City, VA",
    "epa_source_county_label": "Charles City County",
    "county_or_equivalent_display": "Charles City County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Charles City County",
    "census_2025_geoid": "51036",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Charlotte, VA",
    "epa_source_county_label": "Charlotte County",
    "county_or_equivalent_display": "Charlotte County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Charlotte County",
    "census_2025_geoid": "51037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Charlottesville, VA",
    "epa_source_county_label": "Charlottesville, VA",
    "county_or_equivalent_display": "Charlottesville city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Charlottesville city",
    "census_2025_geoid": "51540",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chesapeake, VA",
    "epa_source_county_label": "Chesapeake, VA",
    "county_or_equivalent_display": "Chesapeake city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chesapeake city",
    "census_2025_geoid": "51550",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chesterfield, VA",
    "epa_source_county_label": "Chesterfield County",
    "county_or_equivalent_display": "Chesterfield County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chesterfield County",
    "census_2025_geoid": "51041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clarke, VA",
    "epa_source_county_label": "Clarke County",
    "county_or_equivalent_display": "Clarke County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clarke County",
    "census_2025_geoid": "51043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clifton Forge, VA",
    "epa_source_county_label": "Clifton Forge, VA",
    "county_or_equivalent_display": "Clifton Forge city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "legacy_or_unmatched",
    "census_2025_county_or_equivalent_name": "",
    "census_2025_geoid": "",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; current Census geography match intentionally left unresolved.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "EPA source geography has no direct name match in the 2025 Census file; no current GEOID was assigned and no zone was silently reallocated."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Colonial Heights, VA",
    "epa_source_county_label": "Colonial Heights, VA",
    "county_or_equivalent_display": "Colonial Heights city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Colonial Heights city",
    "census_2025_geoid": "51570",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Covington, VA",
    "epa_source_county_label": "Covington, VA",
    "county_or_equivalent_display": "Covington city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Covington city",
    "census_2025_geoid": "51580",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Craig, VA",
    "epa_source_county_label": "Craig County",
    "county_or_equivalent_display": "Craig County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Craig County",
    "census_2025_geoid": "51045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Culpeper, VA",
    "epa_source_county_label": "Culpeper County",
    "county_or_equivalent_display": "Culpeper County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Culpeper County",
    "census_2025_geoid": "51047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cumberland, VA",
    "epa_source_county_label": "Cumberland County",
    "county_or_equivalent_display": "Cumberland County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cumberland County",
    "census_2025_geoid": "51049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Danville, VA",
    "epa_source_county_label": "Danville, VA",
    "county_or_equivalent_display": "Danville city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Danville city",
    "census_2025_geoid": "51590",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dickenson, VA",
    "epa_source_county_label": "Dickenson County",
    "county_or_equivalent_display": "Dickenson County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dickenson County",
    "census_2025_geoid": "51051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dinwiddie, VA",
    "epa_source_county_label": "Dinwiddie County",
    "county_or_equivalent_display": "Dinwiddie County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dinwiddie County",
    "census_2025_geoid": "51053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Emporia, VA",
    "epa_source_county_label": "Emporia, VA",
    "county_or_equivalent_display": "Emporia city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Emporia city",
    "census_2025_geoid": "51595",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Essex, VA",
    "epa_source_county_label": "Essex County",
    "county_or_equivalent_display": "Essex County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Essex County",
    "census_2025_geoid": "51057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fairfax, VA",
    "epa_source_county_label": "Fairfax County",
    "county_or_equivalent_display": "Fairfax County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fairfax County",
    "census_2025_geoid": "51059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fairfax, VA",
    "epa_source_county_label": "Fairfax, VA",
    "county_or_equivalent_display": "Fairfax city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fairfax city",
    "census_2025_geoid": "51600",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Falls Church, VA",
    "epa_source_county_label": "Falls Church, VA",
    "county_or_equivalent_display": "Falls Church city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Falls Church city",
    "census_2025_geoid": "51610",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fauquier, VA",
    "epa_source_county_label": "Fauquier County",
    "county_or_equivalent_display": "Fauquier County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fauquier County",
    "census_2025_geoid": "51061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Floyd, VA",
    "epa_source_county_label": "Floyd County",
    "county_or_equivalent_display": "Floyd County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Floyd County",
    "census_2025_geoid": "51063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fluvanna, VA",
    "epa_source_county_label": "Fluvanna County",
    "county_or_equivalent_display": "Fluvanna County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fluvanna County",
    "census_2025_geoid": "51065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Franklin, VA",
    "epa_source_county_label": "Franklin County",
    "county_or_equivalent_display": "Franklin County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Franklin County",
    "census_2025_geoid": "51067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Franklin, VA",
    "epa_source_county_label": "Franklin, VA",
    "county_or_equivalent_display": "Franklin city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Franklin city",
    "census_2025_geoid": "51620",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Frederick, VA",
    "epa_source_county_label": "Frederick County",
    "county_or_equivalent_display": "Frederick County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Frederick County",
    "census_2025_geoid": "51069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fredericksburg, VA",
    "epa_source_county_label": "Fredericksburg, VA",
    "county_or_equivalent_display": "Fredericksburg city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fredericksburg city",
    "census_2025_geoid": "51630",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Galax, VA",
    "epa_source_county_label": "Galax, VA",
    "county_or_equivalent_display": "Galax city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Galax city",
    "census_2025_geoid": "51640",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Giles, VA",
    "epa_source_county_label": "Giles County",
    "county_or_equivalent_display": "Giles County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Giles County",
    "census_2025_geoid": "51071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gloucester, VA",
    "epa_source_county_label": "Gloucester County",
    "county_or_equivalent_display": "Gloucester County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gloucester County",
    "census_2025_geoid": "51073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Goochland, VA",
    "epa_source_county_label": "Goochland County",
    "county_or_equivalent_display": "Goochland County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Goochland County",
    "census_2025_geoid": "51075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grayson, VA",
    "epa_source_county_label": "Grayson County",
    "county_or_equivalent_display": "Grayson County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grayson County",
    "census_2025_geoid": "51077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Greene, VA",
    "epa_source_county_label": "Greene County",
    "county_or_equivalent_display": "Greene County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Greene County",
    "census_2025_geoid": "51079",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Greensville, VA",
    "epa_source_county_label": "Greensville County",
    "county_or_equivalent_display": "Greensville County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Greensville County",
    "census_2025_geoid": "51081",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Halifax, VA",
    "epa_source_county_label": "Halifax County",
    "county_or_equivalent_display": "Halifax County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Halifax County",
    "census_2025_geoid": "51083",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hampton, VA",
    "epa_source_county_label": "Hampton, VA",
    "county_or_equivalent_display": "Hampton city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hampton city",
    "census_2025_geoid": "51650",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hanover, VA",
    "epa_source_county_label": "Hanover County",
    "county_or_equivalent_display": "Hanover County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hanover County",
    "census_2025_geoid": "51085",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Harrisonburg, VA",
    "epa_source_county_label": "Harrisonburg, VA",
    "county_or_equivalent_display": "Harrisonburg city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Harrisonburg city",
    "census_2025_geoid": "51660",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Henrico, VA",
    "epa_source_county_label": "Henrico County",
    "county_or_equivalent_display": "Henrico County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Henrico County",
    "census_2025_geoid": "51087",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Henry, VA",
    "epa_source_county_label": "Henry County",
    "county_or_equivalent_display": "Henry County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Henry County",
    "census_2025_geoid": "51089",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Highland, VA",
    "epa_source_county_label": "Highland County",
    "county_or_equivalent_display": "Highland County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Highland County",
    "census_2025_geoid": "51091",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hopewell, VA",
    "epa_source_county_label": "Hopewell, VA",
    "county_or_equivalent_display": "Hopewell city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hopewell city",
    "census_2025_geoid": "51670",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Isle of Wight, VA",
    "epa_source_county_label": "Isle of Wight County",
    "county_or_equivalent_display": "Isle of Wight County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Isle of Wight County",
    "census_2025_geoid": "51093",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "James City, VA",
    "epa_source_county_label": "James City County",
    "county_or_equivalent_display": "James City County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "James City County",
    "census_2025_geoid": "51095",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "King George, VA",
    "epa_source_county_label": "King George County",
    "county_or_equivalent_display": "King George County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "King George County",
    "census_2025_geoid": "51099",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "King William, VA",
    "epa_source_county_label": "King William County",
    "county_or_equivalent_display": "King William County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "King William County",
    "census_2025_geoid": "51101",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "King and Queen, VA",
    "epa_source_county_label": "King and Queen County",
    "county_or_equivalent_display": "King and Queen County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "King and Queen County",
    "census_2025_geoid": "51097",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lancaster, VA",
    "epa_source_county_label": "Lancaster County",
    "county_or_equivalent_display": "Lancaster County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lancaster County",
    "census_2025_geoid": "51103",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lee, VA",
    "epa_source_county_label": "Lee County",
    "county_or_equivalent_display": "Lee County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lee County",
    "census_2025_geoid": "51105",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lexington, VA",
    "epa_source_county_label": "Lexington, VA",
    "county_or_equivalent_display": "Lexington city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lexington city",
    "census_2025_geoid": "51678",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Loudoun, VA",
    "epa_source_county_label": "Loudoun County",
    "county_or_equivalent_display": "Loudoun County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Loudoun County",
    "census_2025_geoid": "51107",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Louisa, VA",
    "epa_source_county_label": "Louisa County",
    "county_or_equivalent_display": "Louisa County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Louisa County",
    "census_2025_geoid": "51109",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lunenburg, VA",
    "epa_source_county_label": "Lunenburg County",
    "county_or_equivalent_display": "Lunenburg County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lunenburg County",
    "census_2025_geoid": "51111",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lynchburg, VA",
    "epa_source_county_label": "Lynchburg, VA",
    "county_or_equivalent_display": "Lynchburg city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lynchburg city",
    "census_2025_geoid": "51680",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Madison, VA",
    "epa_source_county_label": "Madison County",
    "county_or_equivalent_display": "Madison County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Madison County",
    "census_2025_geoid": "51113",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Manassas Park, VA",
    "epa_source_county_label": "Manassas Park, VA",
    "county_or_equivalent_display": "Manassas Park city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Manassas Park city",
    "census_2025_geoid": "51685",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Manassas, VA",
    "epa_source_county_label": "Manassas, VA",
    "county_or_equivalent_display": "Manassas city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Manassas city",
    "census_2025_geoid": "51683",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Martinsville, VA",
    "epa_source_county_label": "Martinsville, VA",
    "county_or_equivalent_display": "Martinsville city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Martinsville city",
    "census_2025_geoid": "51690",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mathews, VA",
    "epa_source_county_label": "Mathews County",
    "county_or_equivalent_display": "Mathews County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mathews County",
    "census_2025_geoid": "51115",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mecklenburg, VA",
    "epa_source_county_label": "Mecklenburg County",
    "county_or_equivalent_display": "Mecklenburg County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mecklenburg County",
    "census_2025_geoid": "51117",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Middlesex, VA",
    "epa_source_county_label": "Middlesex County",
    "county_or_equivalent_display": "Middlesex County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Middlesex County",
    "census_2025_geoid": "51119",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Montgomery, VA",
    "epa_source_county_label": "Montgomery County",
    "county_or_equivalent_display": "Montgomery County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Montgomery County",
    "census_2025_geoid": "51121",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Nelson, VA",
    "epa_source_county_label": "Nelson County",
    "county_or_equivalent_display": "Nelson County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Nelson County",
    "census_2025_geoid": "51125",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "New Kent, VA",
    "epa_source_county_label": "New Kent County",
    "county_or_equivalent_display": "New Kent County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "New Kent County",
    "census_2025_geoid": "51127",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Newport News, VA",
    "epa_source_county_label": "Newport News, VA",
    "county_or_equivalent_display": "Newport News city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Newport News city",
    "census_2025_geoid": "51700",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Norfolk, VA",
    "epa_source_county_label": "Norfolk, VA",
    "county_or_equivalent_display": "Norfolk city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Norfolk city",
    "census_2025_geoid": "51710",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Northampton, VA",
    "epa_source_county_label": "Northampton County",
    "county_or_equivalent_display": "Northampton County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Northampton County",
    "census_2025_geoid": "51131",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Northumberland, VA",
    "epa_source_county_label": "Northumberland County",
    "county_or_equivalent_display": "Northumberland County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Northumberland County",
    "census_2025_geoid": "51133",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Norton, VA",
    "epa_source_county_label": "Norton, VA",
    "county_or_equivalent_display": "Norton city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Norton city",
    "census_2025_geoid": "51720",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Nottoway, VA",
    "epa_source_county_label": "Nottoway County",
    "county_or_equivalent_display": "Nottoway County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Nottoway County",
    "census_2025_geoid": "51135",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Orange, VA",
    "epa_source_county_label": "Orange County",
    "county_or_equivalent_display": "Orange County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Orange County",
    "census_2025_geoid": "51137",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Page, VA",
    "epa_source_county_label": "Page County",
    "county_or_equivalent_display": "Page County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Page County",
    "census_2025_geoid": "51139",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Patrick, VA",
    "epa_source_county_label": "Patrick County",
    "county_or_equivalent_display": "Patrick County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Patrick County",
    "census_2025_geoid": "51141",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Petersburg, VA",
    "epa_source_county_label": "Petersburg, VA",
    "county_or_equivalent_display": "Petersburg city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Petersburg city",
    "census_2025_geoid": "51730",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pittsylvania, VA",
    "epa_source_county_label": "Pittsylvania County",
    "county_or_equivalent_display": "Pittsylvania County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pittsylvania County",
    "census_2025_geoid": "51143",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Poquoson, VA",
    "epa_source_county_label": "Poquoson, VA",
    "county_or_equivalent_display": "Poquoson city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Poquoson city",
    "census_2025_geoid": "51735",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Portsmouth, VA",
    "epa_source_county_label": "Portsmouth, VA",
    "county_or_equivalent_display": "Portsmouth city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Portsmouth city",
    "census_2025_geoid": "51740",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Powhatan, VA",
    "epa_source_county_label": "Powhatan County",
    "county_or_equivalent_display": "Powhatan County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Powhatan County",
    "census_2025_geoid": "51145",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Prince Edward, VA",
    "epa_source_county_label": "Prince Edward County",
    "county_or_equivalent_display": "Prince Edward County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Prince Edward County",
    "census_2025_geoid": "51147",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Prince George, VA",
    "epa_source_county_label": "Prince George County",
    "county_or_equivalent_display": "Prince George County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Prince George County",
    "census_2025_geoid": "51149",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Prince William, VA",
    "epa_source_county_label": "Prince William County",
    "county_or_equivalent_display": "Prince William County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Prince William County",
    "census_2025_geoid": "51153",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pulaski, VA",
    "epa_source_county_label": "Pulaski County",
    "county_or_equivalent_display": "Pulaski County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pulaski County",
    "census_2025_geoid": "51155",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Radford, VA",
    "epa_source_county_label": "Radford, VA",
    "county_or_equivalent_display": "Radford city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Radford city",
    "census_2025_geoid": "51750",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rappahannock, VA",
    "epa_source_county_label": "Rappahannock County",
    "county_or_equivalent_display": "Rappahannock County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rappahannock County",
    "census_2025_geoid": "51157",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Richmond, VA",
    "epa_source_county_label": "Richmond County",
    "county_or_equivalent_display": "Richmond County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Richmond County",
    "census_2025_geoid": "51159",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Richmond, VA",
    "epa_source_county_label": "Richmond, VA",
    "county_or_equivalent_display": "Richmond city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Richmond city",
    "census_2025_geoid": "51760",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Roanoke, VA",
    "epa_source_county_label": "Roanoke County",
    "county_or_equivalent_display": "Roanoke County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Roanoke County",
    "census_2025_geoid": "51161",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Roanoke, VA",
    "epa_source_county_label": "Roanoke, VA",
    "county_or_equivalent_display": "Roanoke city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Roanoke city",
    "census_2025_geoid": "51770",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rockbridge, VA",
    "epa_source_county_label": "Rockbridge County",
    "county_or_equivalent_display": "Rockbridge County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rockbridge County",
    "census_2025_geoid": "51163",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rockingham, VA",
    "epa_source_county_label": "Rockingham County",
    "county_or_equivalent_display": "Rockingham County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rockingham County",
    "census_2025_geoid": "51165",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Russell, VA",
    "epa_source_county_label": "Russell County",
    "county_or_equivalent_display": "Russell County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Russell County",
    "census_2025_geoid": "51167",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Salem, VA",
    "epa_source_county_label": "Salem, VA",
    "county_or_equivalent_display": "Salem city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Salem city",
    "census_2025_geoid": "51775",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Scott, VA",
    "epa_source_county_label": "Scott County",
    "county_or_equivalent_display": "Scott County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Scott County",
    "census_2025_geoid": "51169",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Shenandoah, VA",
    "epa_source_county_label": "Shenandoah County",
    "county_or_equivalent_display": "Shenandoah County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Shenandoah County",
    "census_2025_geoid": "51171",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Smyth, VA",
    "epa_source_county_label": "Smyth County",
    "county_or_equivalent_display": "Smyth County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Smyth County",
    "census_2025_geoid": "51173",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "South Boston, VA",
    "epa_source_county_label": "South Boston, VA",
    "county_or_equivalent_display": "South Boston city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "legacy_or_unmatched",
    "census_2025_county_or_equivalent_name": "",
    "census_2025_geoid": "",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; current Census geography match intentionally left unresolved.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "EPA source geography has no direct name match in the 2025 Census file; no current GEOID was assigned and no zone was silently reallocated."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Southampton, VA",
    "epa_source_county_label": "Southampton County",
    "county_or_equivalent_display": "Southampton County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Southampton County",
    "census_2025_geoid": "51175",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Spotsylvania, VA",
    "epa_source_county_label": "Spotsylvania County",
    "county_or_equivalent_display": "Spotsylvania County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Spotsylvania County",
    "census_2025_geoid": "51177",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Stafford, VA",
    "epa_source_county_label": "Stafford County",
    "county_or_equivalent_display": "Stafford County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Stafford County",
    "census_2025_geoid": "51179",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Staunton, VA",
    "epa_source_county_label": "Staunton, VA",
    "county_or_equivalent_display": "Staunton city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Staunton city",
    "census_2025_geoid": "51790",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Suffolk, VA",
    "epa_source_county_label": "Suffolk, VA",
    "county_or_equivalent_display": "Suffolk city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Suffolk city",
    "census_2025_geoid": "51800",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Surry, VA",
    "epa_source_county_label": "Surry County",
    "county_or_equivalent_display": "Surry County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Surry County",
    "census_2025_geoid": "51181",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sussex, VA",
    "epa_source_county_label": "Sussex County",
    "county_or_equivalent_display": "Sussex County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sussex County",
    "census_2025_geoid": "51183",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tazewell, VA",
    "epa_source_county_label": "Tazewell County",
    "county_or_equivalent_display": "Tazewell County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tazewell County",
    "census_2025_geoid": "51185",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Virginia Beach, VA",
    "epa_source_county_label": "Virginia Beach, VA",
    "county_or_equivalent_display": "Virginia Beach city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Virginia Beach city",
    "census_2025_geoid": "51810",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Warren, VA",
    "epa_source_county_label": "Warren County",
    "county_or_equivalent_display": "Warren County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Warren County",
    "census_2025_geoid": "51187",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washington, VA",
    "epa_source_county_label": "Washington County",
    "county_or_equivalent_display": "Washington County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washington County",
    "census_2025_geoid": "51191",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Waynesboro, VA",
    "epa_source_county_label": "Waynesboro, VA",
    "county_or_equivalent_display": "Waynesboro city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Waynesboro city",
    "census_2025_geoid": "51820",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Westmoreland, VA",
    "epa_source_county_label": "Westmoreland County",
    "county_or_equivalent_display": "Westmoreland County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Westmoreland County",
    "census_2025_geoid": "51193",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Williamsburg, VA",
    "epa_source_county_label": "Williamsburg, VA",
    "county_or_equivalent_display": "Williamsburg city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Williamsburg city",
    "census_2025_geoid": "51830",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Winchester, VA",
    "epa_source_county_label": "Winchester, VA",
    "county_or_equivalent_display": "Winchester city",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "independent city",
    "epa_region_source_value": ".",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Winchester city",
    "census_2025_geoid": "51840",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wise, VA",
    "epa_source_county_label": "Wise County",
    "county_or_equivalent_display": "Wise County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wise County",
    "census_2025_geoid": "51195",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wythe, VA",
    "epa_source_county_label": "Wythe County",
    "county_or_equivalent_display": "Wythe County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wythe County",
    "census_2025_geoid": "51197",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "York, VA",
    "epa_source_county_label": "York County",
    "county_or_equivalent_display": "York County",
    "state_name": "Virginia",
    "state_abbreviation": "VA",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "York County",
    "census_2025_geoid": "51199",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Adams, WA",
    "epa_source_county_label": "Adams County",
    "county_or_equivalent_display": "Adams County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Adams County",
    "census_2025_geoid": "53001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Asotin, WA",
    "epa_source_county_label": "Asotin County",
    "county_or_equivalent_display": "Asotin County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Asotin County",
    "census_2025_geoid": "53003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Benton, WA",
    "epa_source_county_label": "Benton County",
    "county_or_equivalent_display": "Benton County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Benton County",
    "census_2025_geoid": "53005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chelan, WA",
    "epa_source_county_label": "Chelan County",
    "county_or_equivalent_display": "Chelan County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chelan County",
    "census_2025_geoid": "53007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clallam, WA",
    "epa_source_county_label": "Clallam County",
    "county_or_equivalent_display": "Clallam County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clallam County",
    "census_2025_geoid": "53009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clark, WA",
    "epa_source_county_label": "Clark County",
    "county_or_equivalent_display": "Clark County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clark County",
    "census_2025_geoid": "53011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Columbia, WA",
    "epa_source_county_label": "Columbia County",
    "county_or_equivalent_display": "Columbia County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Columbia County",
    "census_2025_geoid": "53013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cowlitz, WA",
    "epa_source_county_label": "Cowlitz County",
    "county_or_equivalent_display": "Cowlitz County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cowlitz County",
    "census_2025_geoid": "53015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Douglas, WA",
    "epa_source_county_label": "Douglas County",
    "county_or_equivalent_display": "Douglas County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Douglas County",
    "census_2025_geoid": "53017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ferry, WA",
    "epa_source_county_label": "Ferry County",
    "county_or_equivalent_display": "Ferry County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ferry County",
    "census_2025_geoid": "53019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Franklin, WA",
    "epa_source_county_label": "Franklin County",
    "county_or_equivalent_display": "Franklin County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Franklin County",
    "census_2025_geoid": "53021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Garfield, WA",
    "epa_source_county_label": "Garfield County",
    "county_or_equivalent_display": "Garfield County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Garfield County",
    "census_2025_geoid": "53023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grant, WA",
    "epa_source_county_label": "Grant County",
    "county_or_equivalent_display": "Grant County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grant County",
    "census_2025_geoid": "53025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grays Harbor, WA",
    "epa_source_county_label": "Grays Harbor County",
    "county_or_equivalent_display": "Grays Harbor County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grays Harbor County",
    "census_2025_geoid": "53027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Island, WA",
    "epa_source_county_label": "Island County",
    "county_or_equivalent_display": "Island County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Island County",
    "census_2025_geoid": "53029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jefferson, WA",
    "epa_source_county_label": "Jefferson County",
    "county_or_equivalent_display": "Jefferson County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jefferson County",
    "census_2025_geoid": "53031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "King, WA",
    "epa_source_county_label": "King County",
    "county_or_equivalent_display": "King County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "King County",
    "census_2025_geoid": "53033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kitsap, WA",
    "epa_source_county_label": "Kitsap County",
    "county_or_equivalent_display": "Kitsap County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kitsap County",
    "census_2025_geoid": "53035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kittitas, WA",
    "epa_source_county_label": "Kittitas County",
    "county_or_equivalent_display": "Kittitas County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kittitas County",
    "census_2025_geoid": "53037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Klickitat, WA",
    "epa_source_county_label": "Klickitat County",
    "county_or_equivalent_display": "Klickitat County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Klickitat County",
    "census_2025_geoid": "53039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lewis, WA",
    "epa_source_county_label": "Lewis County",
    "county_or_equivalent_display": "Lewis County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lewis County",
    "census_2025_geoid": "53041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lincoln, WA",
    "epa_source_county_label": "Lincoln County",
    "county_or_equivalent_display": "Lincoln County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lincoln County",
    "census_2025_geoid": "53043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mason, WA",
    "epa_source_county_label": "Mason County",
    "county_or_equivalent_display": "Mason County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mason County",
    "census_2025_geoid": "53045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Okanogan, WA",
    "epa_source_county_label": "Okanogan County",
    "county_or_equivalent_display": "Okanogan County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Okanogan County",
    "census_2025_geoid": "53047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pacific, WA",
    "epa_source_county_label": "Pacific County",
    "county_or_equivalent_display": "Pacific County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pacific County",
    "census_2025_geoid": "53049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pend Oreille, WA",
    "epa_source_county_label": "Pend Oreille County",
    "county_or_equivalent_display": "Pend Oreille County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pend Oreille County",
    "census_2025_geoid": "53051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pierce, WA",
    "epa_source_county_label": "Pierce County",
    "county_or_equivalent_display": "Pierce County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pierce County",
    "census_2025_geoid": "53053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "San Juan, WA",
    "epa_source_county_label": "San Juan County",
    "county_or_equivalent_display": "San Juan County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "San Juan County",
    "census_2025_geoid": "53055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Skagit, WA",
    "epa_source_county_label": "Skagit County",
    "county_or_equivalent_display": "Skagit County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Skagit County",
    "census_2025_geoid": "53057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Skamania, WA",
    "epa_source_county_label": "Skamania County",
    "county_or_equivalent_display": "Skamania County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Skamania County",
    "census_2025_geoid": "53059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Snohomish, WA",
    "epa_source_county_label": "Snohomish County",
    "county_or_equivalent_display": "Snohomish County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Snohomish County",
    "census_2025_geoid": "53061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Spokane, WA",
    "epa_source_county_label": "Spokane County",
    "county_or_equivalent_display": "Spokane County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Spokane County",
    "census_2025_geoid": "53063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Stevens, WA",
    "epa_source_county_label": "Stevens County",
    "county_or_equivalent_display": "Stevens County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Stevens County",
    "census_2025_geoid": "53065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Thurston, WA",
    "epa_source_county_label": "Thurston County",
    "county_or_equivalent_display": "Thurston County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Thurston County",
    "census_2025_geoid": "53067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wahkiakum, WA",
    "epa_source_county_label": "Wahkiakum County",
    "county_or_equivalent_display": "Wahkiakum County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wahkiakum County",
    "census_2025_geoid": "53069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Walla Walla, WA",
    "epa_source_county_label": "Walla Walla County",
    "county_or_equivalent_display": "Walla Walla County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Walla Walla County",
    "census_2025_geoid": "53071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Whatcom, WA",
    "epa_source_county_label": "Whatcom County",
    "county_or_equivalent_display": "Whatcom County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Whatcom County",
    "census_2025_geoid": "53073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Whitman, WA",
    "epa_source_county_label": "Whitman County",
    "county_or_equivalent_display": "Whitman County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Whitman County",
    "census_2025_geoid": "53075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Yakima, WA",
    "epa_source_county_label": "Yakima County",
    "county_or_equivalent_display": "Yakima County",
    "state_name": "Washington",
    "state_abbreviation": "WA",
    "geography_type": "county",
    "epa_region_source_value": "10",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Yakima County",
    "census_2025_geoid": "53077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Barbour, WV",
    "epa_source_county_label": "Barbour County",
    "county_or_equivalent_display": "Barbour County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Barbour County",
    "census_2025_geoid": "54001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Berkeley, WV",
    "epa_source_county_label": "Berkeley County",
    "county_or_equivalent_display": "Berkeley County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Berkeley County",
    "census_2025_geoid": "54003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Boone, WV",
    "epa_source_county_label": "Boone County",
    "county_or_equivalent_display": "Boone County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Boone County",
    "census_2025_geoid": "54005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Braxton, WV",
    "epa_source_county_label": "Braxton County",
    "county_or_equivalent_display": "Braxton County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Braxton County",
    "census_2025_geoid": "54007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Brooke, WV",
    "epa_source_county_label": "Brooke County",
    "county_or_equivalent_display": "Brooke County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Brooke County",
    "census_2025_geoid": "54009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Cabell, WV",
    "epa_source_county_label": "Cabell County",
    "county_or_equivalent_display": "Cabell County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Cabell County",
    "census_2025_geoid": "54011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Calhoun, WV",
    "epa_source_county_label": "Calhoun County",
    "county_or_equivalent_display": "Calhoun County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Calhoun County",
    "census_2025_geoid": "54013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clay, WV",
    "epa_source_county_label": "Clay County",
    "county_or_equivalent_display": "Clay County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clay County",
    "census_2025_geoid": "54015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Doddridge, WV",
    "epa_source_county_label": "Doddridge County",
    "county_or_equivalent_display": "Doddridge County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Doddridge County",
    "census_2025_geoid": "54017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fayette, WV",
    "epa_source_county_label": "Fayette County",
    "county_or_equivalent_display": "Fayette County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fayette County",
    "census_2025_geoid": "54019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Gilmer, WV",
    "epa_source_county_label": "Gilmer County",
    "county_or_equivalent_display": "Gilmer County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Gilmer County",
    "census_2025_geoid": "54021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grant, WV",
    "epa_source_county_label": "Grant County",
    "county_or_equivalent_display": "Grant County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grant County",
    "census_2025_geoid": "54023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Greenbrier, WV",
    "epa_source_county_label": "Greenbrier County",
    "county_or_equivalent_display": "Greenbrier County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Greenbrier County",
    "census_2025_geoid": "54025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hampshire, WV",
    "epa_source_county_label": "Hampshire County",
    "county_or_equivalent_display": "Hampshire County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hampshire County",
    "census_2025_geoid": "54027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hancock, WV",
    "epa_source_county_label": "Hancock County",
    "county_or_equivalent_display": "Hancock County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hancock County",
    "census_2025_geoid": "54029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hardy, WV",
    "epa_source_county_label": "Hardy County",
    "county_or_equivalent_display": "Hardy County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hardy County",
    "census_2025_geoid": "54031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Harrison, WV",
    "epa_source_county_label": "Harrison County",
    "county_or_equivalent_display": "Harrison County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Harrison County",
    "census_2025_geoid": "54033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jackson, WV",
    "epa_source_county_label": "Jackson County",
    "county_or_equivalent_display": "Jackson County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jackson County",
    "census_2025_geoid": "54035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jefferson, WV",
    "epa_source_county_label": "Jefferson County",
    "county_or_equivalent_display": "Jefferson County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jefferson County",
    "census_2025_geoid": "54037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kanawha, WV",
    "epa_source_county_label": "Kanawha County",
    "county_or_equivalent_display": "Kanawha County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kanawha County",
    "census_2025_geoid": "54039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lewis, WV",
    "epa_source_county_label": "Lewis County",
    "county_or_equivalent_display": "Lewis County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lewis County",
    "census_2025_geoid": "54041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lincoln, WV",
    "epa_source_county_label": "Lincoln County",
    "county_or_equivalent_display": "Lincoln County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lincoln County",
    "census_2025_geoid": "54043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Logan, WV",
    "epa_source_county_label": "Logan County",
    "county_or_equivalent_display": "Logan County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Logan County",
    "census_2025_geoid": "54045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marion, WV",
    "epa_source_county_label": "Marion County",
    "county_or_equivalent_display": "Marion County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marion County",
    "census_2025_geoid": "54049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marshall, WV",
    "epa_source_county_label": "Marshall County",
    "county_or_equivalent_display": "Marshall County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marshall County",
    "census_2025_geoid": "54051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mason, WV",
    "epa_source_county_label": "Mason County",
    "county_or_equivalent_display": "Mason County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mason County",
    "census_2025_geoid": "54053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "McDowell, WV",
    "epa_source_county_label": "McDowell County",
    "county_or_equivalent_display": "McDowell County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "McDowell County",
    "census_2025_geoid": "54047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mercer, WV",
    "epa_source_county_label": "Mercer County",
    "county_or_equivalent_display": "Mercer County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mercer County",
    "census_2025_geoid": "54055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mineral, WV",
    "epa_source_county_label": "Mineral County",
    "county_or_equivalent_display": "Mineral County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mineral County",
    "census_2025_geoid": "54057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Mingo, WV",
    "epa_source_county_label": "Mingo County",
    "county_or_equivalent_display": "Mingo County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Mingo County",
    "census_2025_geoid": "54059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Monongalia, WV",
    "epa_source_county_label": "Monongalia County",
    "county_or_equivalent_display": "Monongalia County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Monongalia County",
    "census_2025_geoid": "54061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Monroe, WV",
    "epa_source_county_label": "Monroe County",
    "county_or_equivalent_display": "Monroe County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Monroe County",
    "census_2025_geoid": "54063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Morgan, WV",
    "epa_source_county_label": "Morgan County",
    "county_or_equivalent_display": "Morgan County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Morgan County",
    "census_2025_geoid": "54065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Nicholas, WV",
    "epa_source_county_label": "Nicholas County",
    "county_or_equivalent_display": "Nicholas County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Nicholas County",
    "census_2025_geoid": "54067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ohio, WV",
    "epa_source_county_label": "Ohio County",
    "county_or_equivalent_display": "Ohio County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ohio County",
    "census_2025_geoid": "54069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pendleton, WV",
    "epa_source_county_label": "Pendleton County",
    "county_or_equivalent_display": "Pendleton County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pendleton County",
    "census_2025_geoid": "54071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pleasants, WV",
    "epa_source_county_label": "Pleasants County",
    "county_or_equivalent_display": "Pleasants County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pleasants County",
    "census_2025_geoid": "54073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pocahontas, WV",
    "epa_source_county_label": "Pocahontas County",
    "county_or_equivalent_display": "Pocahontas County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pocahontas County",
    "census_2025_geoid": "54075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Preston, WV",
    "epa_source_county_label": "Preston County",
    "county_or_equivalent_display": "Preston County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Preston County",
    "census_2025_geoid": "54077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Putnam, WV",
    "epa_source_county_label": "Putnam County",
    "county_or_equivalent_display": "Putnam County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Putnam County",
    "census_2025_geoid": "54079",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Raleigh, WV",
    "epa_source_county_label": "Raleigh County",
    "county_or_equivalent_display": "Raleigh County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Raleigh County",
    "census_2025_geoid": "54081",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Randolph, WV",
    "epa_source_county_label": "Randolph County",
    "county_or_equivalent_display": "Randolph County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Randolph County",
    "census_2025_geoid": "54083",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ritchie, WV",
    "epa_source_county_label": "Ritchie County",
    "county_or_equivalent_display": "Ritchie County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ritchie County",
    "census_2025_geoid": "54085",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Roane, WV",
    "epa_source_county_label": "Roane County",
    "county_or_equivalent_display": "Roane County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Roane County",
    "census_2025_geoid": "54087",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Summers, WV",
    "epa_source_county_label": "Summers County",
    "county_or_equivalent_display": "Summers County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Summers County",
    "census_2025_geoid": "54089",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Taylor, WV",
    "epa_source_county_label": "Taylor County",
    "county_or_equivalent_display": "Taylor County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Taylor County",
    "census_2025_geoid": "54091",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tucker, WV",
    "epa_source_county_label": "Tucker County",
    "county_or_equivalent_display": "Tucker County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tucker County",
    "census_2025_geoid": "54093",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Tyler, WV",
    "epa_source_county_label": "Tyler County",
    "county_or_equivalent_display": "Tyler County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Tyler County",
    "census_2025_geoid": "54095",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Upshur, WV",
    "epa_source_county_label": "Upshur County",
    "county_or_equivalent_display": "Upshur County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Upshur County",
    "census_2025_geoid": "54097",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wayne, WV",
    "epa_source_county_label": "Wayne County",
    "county_or_equivalent_display": "Wayne County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wayne County",
    "census_2025_geoid": "54099",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Webster, WV",
    "epa_source_county_label": "Webster County",
    "county_or_equivalent_display": "Webster County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Webster County",
    "census_2025_geoid": "54101",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wetzel, WV",
    "epa_source_county_label": "Wetzel County",
    "county_or_equivalent_display": "Wetzel County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wetzel County",
    "census_2025_geoid": "54103",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wirt, WV",
    "epa_source_county_label": "Wirt County",
    "county_or_equivalent_display": "Wirt County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wirt County",
    "census_2025_geoid": "54105",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wood, WV",
    "epa_source_county_label": "Wood County",
    "county_or_equivalent_display": "Wood County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wood County",
    "census_2025_geoid": "54107",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wyoming, WV",
    "epa_source_county_label": "Wyoming County",
    "county_or_equivalent_display": "Wyoming County",
    "state_name": "West Virginia",
    "state_abbreviation": "WV",
    "geography_type": "county",
    "epa_region_source_value": "3",
    "epa_radon_zone": "3",
    "epa_zone_descriptor": "Low potential",
    "epa_predicted_average_range": "Average indoor radon levels may be less than 2 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wyoming County",
    "census_2025_geoid": "54109",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Adams, WI",
    "epa_source_county_label": "Adams County",
    "county_or_equivalent_display": "Adams County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Adams County",
    "census_2025_geoid": "55001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ashland, WI",
    "epa_source_county_label": "Ashland County",
    "county_or_equivalent_display": "Ashland County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ashland County",
    "census_2025_geoid": "55003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Barron, WI",
    "epa_source_county_label": "Barron County",
    "county_or_equivalent_display": "Barron County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Barron County",
    "census_2025_geoid": "55005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Bayfield, WI",
    "epa_source_county_label": "Bayfield County",
    "county_or_equivalent_display": "Bayfield County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Bayfield County",
    "census_2025_geoid": "55007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Brown, WI",
    "epa_source_county_label": "Brown County",
    "county_or_equivalent_display": "Brown County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Brown County",
    "census_2025_geoid": "55009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Buffalo, WI",
    "epa_source_county_label": "Buffalo County",
    "county_or_equivalent_display": "Buffalo County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Buffalo County",
    "census_2025_geoid": "55011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Burnett, WI",
    "epa_source_county_label": "Burnett County",
    "county_or_equivalent_display": "Burnett County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Burnett County",
    "census_2025_geoid": "55013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Calumet, WI",
    "epa_source_county_label": "Calumet County",
    "county_or_equivalent_display": "Calumet County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Calumet County",
    "census_2025_geoid": "55015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Chippewa, WI",
    "epa_source_county_label": "Chippewa County",
    "county_or_equivalent_display": "Chippewa County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Chippewa County",
    "census_2025_geoid": "55017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Clark, WI",
    "epa_source_county_label": "Clark County",
    "county_or_equivalent_display": "Clark County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Clark County",
    "census_2025_geoid": "55019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Columbia, WI",
    "epa_source_county_label": "Columbia County",
    "county_or_equivalent_display": "Columbia County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Columbia County",
    "census_2025_geoid": "55021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Crawford, WI",
    "epa_source_county_label": "Crawford County",
    "county_or_equivalent_display": "Crawford County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Crawford County",
    "census_2025_geoid": "55023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dane, WI",
    "epa_source_county_label": "Dane County",
    "county_or_equivalent_display": "Dane County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dane County",
    "census_2025_geoid": "55025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dodge, WI",
    "epa_source_county_label": "Dodge County",
    "county_or_equivalent_display": "Dodge County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dodge County",
    "census_2025_geoid": "55027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Door, WI",
    "epa_source_county_label": "Door County",
    "county_or_equivalent_display": "Door County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Door County",
    "census_2025_geoid": "55029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Douglas, WI",
    "epa_source_county_label": "Douglas County",
    "county_or_equivalent_display": "Douglas County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Douglas County",
    "census_2025_geoid": "55031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Dunn, WI",
    "epa_source_county_label": "Dunn County",
    "county_or_equivalent_display": "Dunn County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Dunn County",
    "census_2025_geoid": "55033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Eau Claire, WI",
    "epa_source_county_label": "Eau Claire County",
    "county_or_equivalent_display": "Eau Claire County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Eau Claire County",
    "census_2025_geoid": "55035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Florence, WI",
    "epa_source_county_label": "Florence County",
    "county_or_equivalent_display": "Florence County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Florence County",
    "census_2025_geoid": "55037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fond du Lac, WI",
    "epa_source_county_label": "Fond du Lac County",
    "county_or_equivalent_display": "Fond du Lac County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fond du Lac County",
    "census_2025_geoid": "55039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Forest, WI",
    "epa_source_county_label": "Forest County",
    "county_or_equivalent_display": "Forest County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Forest County",
    "census_2025_geoid": "55041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Grant, WI",
    "epa_source_county_label": "Grant County",
    "county_or_equivalent_display": "Grant County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Grant County",
    "census_2025_geoid": "55043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Green, WI",
    "epa_source_county_label": "Green County",
    "county_or_equivalent_display": "Green County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Green County",
    "census_2025_geoid": "55045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Green Lake, WI",
    "epa_source_county_label": "Green Lake County",
    "county_or_equivalent_display": "Green Lake County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Green Lake County",
    "census_2025_geoid": "55047",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Iowa, WI",
    "epa_source_county_label": "Iowa County",
    "county_or_equivalent_display": "Iowa County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Iowa County",
    "census_2025_geoid": "55049",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Iron, WI",
    "epa_source_county_label": "Iron County",
    "county_or_equivalent_display": "Iron County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Iron County",
    "census_2025_geoid": "55051",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jackson, WI",
    "epa_source_county_label": "Jackson County",
    "county_or_equivalent_display": "Jackson County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jackson County",
    "census_2025_geoid": "55053",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Jefferson, WI",
    "epa_source_county_label": "Jefferson County",
    "county_or_equivalent_display": "Jefferson County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Jefferson County",
    "census_2025_geoid": "55055",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Juneau, WI",
    "epa_source_county_label": "Juneau County",
    "county_or_equivalent_display": "Juneau County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Juneau County",
    "census_2025_geoid": "55057",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kenosha, WI",
    "epa_source_county_label": "Kenosha County",
    "county_or_equivalent_display": "Kenosha County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kenosha County",
    "census_2025_geoid": "55059",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Kewaunee, WI",
    "epa_source_county_label": "Kewaunee County",
    "county_or_equivalent_display": "Kewaunee County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Kewaunee County",
    "census_2025_geoid": "55061",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "La Crosse, WI",
    "epa_source_county_label": "La Crosse County",
    "county_or_equivalent_display": "La Crosse County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "La Crosse County",
    "census_2025_geoid": "55063",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lafayette, WI",
    "epa_source_county_label": "Lafayette County",
    "county_or_equivalent_display": "Lafayette County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lafayette County",
    "census_2025_geoid": "55065",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Langlade, WI",
    "epa_source_county_label": "Langlade County",
    "county_or_equivalent_display": "Langlade County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Langlade County",
    "census_2025_geoid": "55067",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lincoln, WI",
    "epa_source_county_label": "Lincoln County",
    "county_or_equivalent_display": "Lincoln County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lincoln County",
    "census_2025_geoid": "55069",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Manitowoc, WI",
    "epa_source_county_label": "Manitowoc County",
    "county_or_equivalent_display": "Manitowoc County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Manitowoc County",
    "census_2025_geoid": "55071",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marathon, WI",
    "epa_source_county_label": "Marathon County",
    "county_or_equivalent_display": "Marathon County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marathon County",
    "census_2025_geoid": "55073",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marinette, WI",
    "epa_source_county_label": "Marinette County",
    "county_or_equivalent_display": "Marinette County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marinette County",
    "census_2025_geoid": "55075",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Marquette, WI",
    "epa_source_county_label": "Marquette County",
    "county_or_equivalent_display": "Marquette County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Marquette County",
    "census_2025_geoid": "55077",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Menominee, WI",
    "epa_source_county_label": "Menominee County",
    "county_or_equivalent_display": "Menominee County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Menominee County",
    "census_2025_geoid": "55078",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Milwaukee, WI",
    "epa_source_county_label": "Milwaukee County",
    "county_or_equivalent_display": "Milwaukee County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Milwaukee County",
    "census_2025_geoid": "55079",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Monroe, WI",
    "epa_source_county_label": "Monroe County",
    "county_or_equivalent_display": "Monroe County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Monroe County",
    "census_2025_geoid": "55081",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Oconto, WI",
    "epa_source_county_label": "Oconto County",
    "county_or_equivalent_display": "Oconto County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Oconto County",
    "census_2025_geoid": "55083",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Oneida, WI",
    "epa_source_county_label": "Oneida County",
    "county_or_equivalent_display": "Oneida County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Oneida County",
    "census_2025_geoid": "55085",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Outagamie, WI",
    "epa_source_county_label": "Outagamie County",
    "county_or_equivalent_display": "Outagamie County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Outagamie County",
    "census_2025_geoid": "55087",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Ozaukee, WI",
    "epa_source_county_label": "Ozaukee County",
    "county_or_equivalent_display": "Ozaukee County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Ozaukee County",
    "census_2025_geoid": "55089",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pepin, WI",
    "epa_source_county_label": "Pepin County",
    "county_or_equivalent_display": "Pepin County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pepin County",
    "census_2025_geoid": "55091",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Pierce, WI",
    "epa_source_county_label": "Pierce County",
    "county_or_equivalent_display": "Pierce County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Pierce County",
    "census_2025_geoid": "55093",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Polk, WI",
    "epa_source_county_label": "Polk County",
    "county_or_equivalent_display": "Polk County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Polk County",
    "census_2025_geoid": "55095",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Portage, WI",
    "epa_source_county_label": "Portage County",
    "county_or_equivalent_display": "Portage County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Portage County",
    "census_2025_geoid": "55097",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Price, WI",
    "epa_source_county_label": "Price County",
    "county_or_equivalent_display": "Price County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Price County",
    "census_2025_geoid": "55099",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Racine, WI",
    "epa_source_county_label": "Racine County",
    "county_or_equivalent_display": "Racine County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Racine County",
    "census_2025_geoid": "55101",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Richland, WI",
    "epa_source_county_label": "Richland County",
    "county_or_equivalent_display": "Richland County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Richland County",
    "census_2025_geoid": "55103",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rock, WI",
    "epa_source_county_label": "Rock County",
    "county_or_equivalent_display": "Rock County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rock County",
    "census_2025_geoid": "55105",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Rusk, WI",
    "epa_source_county_label": "Rusk County",
    "county_or_equivalent_display": "Rusk County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Rusk County",
    "census_2025_geoid": "55107",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sauk, WI",
    "epa_source_county_label": "Sauk County",
    "county_or_equivalent_display": "Sauk County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sauk County",
    "census_2025_geoid": "55111",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sawyer, WI",
    "epa_source_county_label": "Sawyer County",
    "county_or_equivalent_display": "Sawyer County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sawyer County",
    "census_2025_geoid": "55113",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Shawano, WI",
    "epa_source_county_label": "Shawano County",
    "county_or_equivalent_display": "Shawano County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Shawano County",
    "census_2025_geoid": "55115",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sheboygan, WI",
    "epa_source_county_label": "Sheboygan County",
    "county_or_equivalent_display": "Sheboygan County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sheboygan County",
    "census_2025_geoid": "55117",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "St. Croix, WI",
    "epa_source_county_label": "St. Croix County",
    "county_or_equivalent_display": "St. Croix County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "St. Croix County",
    "census_2025_geoid": "55109",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Taylor, WI",
    "epa_source_county_label": "Taylor County",
    "county_or_equivalent_display": "Taylor County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Taylor County",
    "census_2025_geoid": "55119",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Trempealeau, WI",
    "epa_source_county_label": "Trempealeau County",
    "county_or_equivalent_display": "Trempealeau County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Trempealeau County",
    "census_2025_geoid": "55121",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Vernon, WI",
    "epa_source_county_label": "Vernon County",
    "county_or_equivalent_display": "Vernon County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Vernon County",
    "census_2025_geoid": "55123",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Vilas, WI",
    "epa_source_county_label": "Vilas County",
    "county_or_equivalent_display": "Vilas County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Vilas County",
    "census_2025_geoid": "55125",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Walworth, WI",
    "epa_source_county_label": "Walworth County",
    "county_or_equivalent_display": "Walworth County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Walworth County",
    "census_2025_geoid": "55127",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washburn, WI",
    "epa_source_county_label": "Washburn County",
    "county_or_equivalent_display": "Washburn County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washburn County",
    "census_2025_geoid": "55129",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washington, WI",
    "epa_source_county_label": "Washington County",
    "county_or_equivalent_display": "Washington County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washington County",
    "census_2025_geoid": "55131",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Waukesha, WI",
    "epa_source_county_label": "Waukesha County",
    "county_or_equivalent_display": "Waukesha County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Waukesha County",
    "census_2025_geoid": "55133",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Waupaca, WI",
    "epa_source_county_label": "Waupaca County",
    "county_or_equivalent_display": "Waupaca County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Waupaca County",
    "census_2025_geoid": "55135",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Waushara, WI",
    "epa_source_county_label": "Waushara County",
    "county_or_equivalent_display": "Waushara County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Waushara County",
    "census_2025_geoid": "55137",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Winnebago, WI",
    "epa_source_county_label": "Winnebago County",
    "county_or_equivalent_display": "Winnebago County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Winnebago County",
    "census_2025_geoid": "55139",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Wood, WI",
    "epa_source_county_label": "Wood County",
    "county_or_equivalent_display": "Wood County",
    "state_name": "Wisconsin",
    "state_abbreviation": "WI",
    "geography_type": "county",
    "epa_region_source_value": "5",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Wood County",
    "census_2025_geoid": "55141",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Albany, WY",
    "epa_source_county_label": "Albany County",
    "county_or_equivalent_display": "Albany County",
    "state_name": "Wyoming",
    "state_abbreviation": "WY",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Albany County",
    "census_2025_geoid": "56001",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Big Horn, WY",
    "epa_source_county_label": "Big Horn County",
    "county_or_equivalent_display": "Big Horn County",
    "state_name": "Wyoming",
    "state_abbreviation": "WY",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Big Horn County",
    "census_2025_geoid": "56003",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Campbell, WY",
    "epa_source_county_label": "Campbell County",
    "county_or_equivalent_display": "Campbell County",
    "state_name": "Wyoming",
    "state_abbreviation": "WY",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Campbell County",
    "census_2025_geoid": "56005",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Carbon, WY",
    "epa_source_county_label": "Carbon County",
    "county_or_equivalent_display": "Carbon County",
    "state_name": "Wyoming",
    "state_abbreviation": "WY",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Carbon County",
    "census_2025_geoid": "56007",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Converse, WY",
    "epa_source_county_label": "Converse County",
    "county_or_equivalent_display": "Converse County",
    "state_name": "Wyoming",
    "state_abbreviation": "WY",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Converse County",
    "census_2025_geoid": "56009",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Crook, WY",
    "epa_source_county_label": "Crook County",
    "county_or_equivalent_display": "Crook County",
    "state_name": "Wyoming",
    "state_abbreviation": "WY",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Crook County",
    "census_2025_geoid": "56011",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Fremont, WY",
    "epa_source_county_label": "Fremont County",
    "county_or_equivalent_display": "Fremont County",
    "state_name": "Wyoming",
    "state_abbreviation": "WY",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Fremont County",
    "census_2025_geoid": "56013",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Goshen, WY",
    "epa_source_county_label": "Goshen County",
    "county_or_equivalent_display": "Goshen County",
    "state_name": "Wyoming",
    "state_abbreviation": "WY",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Goshen County",
    "census_2025_geoid": "56015",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Hot Springs, WY",
    "epa_source_county_label": "Hot Springs County",
    "county_or_equivalent_display": "Hot Springs County",
    "state_name": "Wyoming",
    "state_abbreviation": "WY",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Hot Springs County",
    "census_2025_geoid": "56017",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Johnson, WY",
    "epa_source_county_label": "Johnson County",
    "county_or_equivalent_display": "Johnson County",
    "state_name": "Wyoming",
    "state_abbreviation": "WY",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Johnson County",
    "census_2025_geoid": "56019",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Laramie, WY",
    "epa_source_county_label": "Laramie County",
    "county_or_equivalent_display": "Laramie County",
    "state_name": "Wyoming",
    "state_abbreviation": "WY",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Laramie County",
    "census_2025_geoid": "56021",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Lincoln, WY",
    "epa_source_county_label": "Lincoln County",
    "county_or_equivalent_display": "Lincoln County",
    "state_name": "Wyoming",
    "state_abbreviation": "WY",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Lincoln County",
    "census_2025_geoid": "56023",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Natrona, WY",
    "epa_source_county_label": "Natrona County",
    "county_or_equivalent_display": "Natrona County",
    "state_name": "Wyoming",
    "state_abbreviation": "WY",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Natrona County",
    "census_2025_geoid": "56025",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Niobrara, WY",
    "epa_source_county_label": "Niobrara County",
    "county_or_equivalent_display": "Niobrara County",
    "state_name": "Wyoming",
    "state_abbreviation": "WY",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Niobrara County",
    "census_2025_geoid": "56027",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Park, WY",
    "epa_source_county_label": "Park County",
    "county_or_equivalent_display": "Park County",
    "state_name": "Wyoming",
    "state_abbreviation": "WY",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Park County",
    "census_2025_geoid": "56029",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Platte, WY",
    "epa_source_county_label": "Platte County",
    "county_or_equivalent_display": "Platte County",
    "state_name": "Wyoming",
    "state_abbreviation": "WY",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Platte County",
    "census_2025_geoid": "56031",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sheridan, WY",
    "epa_source_county_label": "Sheridan County",
    "county_or_equivalent_display": "Sheridan County",
    "state_name": "Wyoming",
    "state_abbreviation": "WY",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sheridan County",
    "census_2025_geoid": "56033",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sublette, WY",
    "epa_source_county_label": "Sublette County",
    "county_or_equivalent_display": "Sublette County",
    "state_name": "Wyoming",
    "state_abbreviation": "WY",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sublette County",
    "census_2025_geoid": "56035",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Sweetwater, WY",
    "epa_source_county_label": "Sweetwater County",
    "county_or_equivalent_display": "Sweetwater County",
    "state_name": "Wyoming",
    "state_abbreviation": "WY",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Sweetwater County",
    "census_2025_geoid": "56037",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Teton, WY",
    "epa_source_county_label": "Teton County",
    "county_or_equivalent_display": "Teton County",
    "state_name": "Wyoming",
    "state_abbreviation": "WY",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Teton County",
    "census_2025_geoid": "56039",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Uinta, WY",
    "epa_source_county_label": "Uinta County",
    "county_or_equivalent_display": "Uinta County",
    "state_name": "Wyoming",
    "state_abbreviation": "WY",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Uinta County",
    "census_2025_geoid": "56041",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Washakie, WY",
    "epa_source_county_label": "Washakie County",
    "county_or_equivalent_display": "Washakie County",
    "state_name": "Wyoming",
    "state_abbreviation": "WY",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "1",
    "epa_zone_descriptor": "Highest potential",
    "epa_predicted_average_range": "Average indoor radon levels may be greater than 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Washakie County",
    "census_2025_geoid": "56043",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  },
  {
    "dataset_version": "2026-07-24.1",
    "epa_source_county_state": "Weston, WY",
    "epa_source_county_label": "Weston County",
    "county_or_equivalent_display": "Weston County",
    "state_name": "Wyoming",
    "state_abbreviation": "WY",
    "geography_type": "county",
    "epa_region_source_value": "8",
    "epa_radon_zone": "2",
    "epa_zone_descriptor": "Moderate potential",
    "epa_predicted_average_range": "Average indoor radon levels may be between 2 and 4 pCi/L",
    "data_type": "EPA radon-potential classification; not an observed county average",
    "underlying_map_model_year": "1993",
    "source_file_vintage": "September 2025",
    "census_2025_geography_match_status": "matched",
    "census_2025_county_or_equivalent_name": "Weston County",
    "census_2025_geoid": "56045",
    "primary_source_publisher": "U.S. Environmental Protection Agency",
    "primary_source_url": "https://www.epa.gov/radon/epa-map-radon-zones-0",
    "geography_reference_publisher": "U.S. Census Bureau",
    "geography_reference_url": "https://www.census.gov/geographies/reference-files/time-series/geo/county-adjacency.2025.html",
    "verification_date": "2026-07-24",
    "verification_tier": "★",
    "verification_status": "★ EPA zone verified against the September 2025 XLS; 2025 Census name/GEOID matched.",
    "home_state_flag": "False",
    "home_county_flag": "False",
    "geography_note": "Direct normalized-name match to the 2025 Census county/county-equivalent file."
  }
]