county string | data_as_of string | derived_fields list | id string | nonattainment_area_name string | pollutant_naaqs string | row_id string | source string | source_quote string | state string | url string | verified_fields list | partial_county string |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Adams County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-adams-county-colorado-denver-boulder-greeley-ft-collins-loveland-co-severe-15 | Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Severe 15) | 8-Hour Ozone (2008) | denver-boulder-greeley-ft-collins-loveland-co-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Adams County | 8-Hour Ozone (2008) | | Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Severe 15) | COLORADO | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-adams-county-colorado-denver-boulder-greeley-ft-collins-loveland-co-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Alameda County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-alameda-county-california-san-francisco-bay-area-ca-marginal | San Francisco Bay Area, CA - (Marginal) | 8-Hour Ozone (2008) | san-francisco-bay-area-ca-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Alameda County | PM-2.5 (2006) | | San Francisco Bay Area, CA - (Moderate) | 8-Hour Ozone (2008) | | San Francisco Bay Area, CA - (Marginal) | CALIFORNIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-alameda-county-california-san-francisco-bay-area-ca-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Allegheny County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-allegheny-county-pennsylvania-pittsburgh-beaver-valley-pa-marginal | Pittsburgh-Beaver Valley, PA - (Marginal) | 8-Hour Ozone (2008) | pittsburgh-beaver-valley-pa-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Allegheny County | 8-Hour Ozone (2008) | | Pittsburgh-Beaver Valley, PA - (Marginal) | PENNSYLVANIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-allegheny-county-pennsylvania-pittsburgh-beaver-valley-pa-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Anne Arundel County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-anne-arundel-county-maryland-baltimore-md-moderate | Baltimore, MD - (Moderate) | 8-Hour Ozone (2008) | baltimore-md-moderate | https://www3.epa.gov/airquality/greenbook/ancl.html | Anne Arundel County | Sulfur Dioxide (2010) | * | Anne Arundel County and Baltimore County, MD | 8-Hour Ozone (2008) | | Baltimore, MD - (Moderate) | MARYLAND | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-anne-arundel-county-maryland-baltimore-md-moderate/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Arapahoe County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-arapahoe-county-colorado-denver-boulder-greeley-ft-collins-loveland-co-severe-15 | Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Severe 15) | 8-Hour Ozone (2008) | denver-boulder-greeley-ft-collins-loveland-co-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Arapahoe County | 8-Hour Ozone (2008) | | Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Severe 15) | COLORADO | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-arapahoe-county-colorado-denver-boulder-greeley-ft-collins-loveland-co-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Armstrong County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-armstrong-county-pennsylvania-pittsburgh-beaver-valley-pa-marginal | Pittsburgh-Beaver Valley, PA - (Marginal) | 8-Hour Ozone (2008) | pittsburgh-beaver-valley-pa-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Armstrong County | Sulfur Dioxide (1971) | * | Armstrong County: Madison, Mahoning, Boggs, Washington, Pine, PA | Sulfur Dioxide (2010) | * | Indiana, PA | 8-Hour Ozone (2008) | | Pittsburgh-Beaver Valley, PA - (Marginal) | PENNSYLVANIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-armstrong-county-pennsylvania-pittsburgh-beaver-valley-pa-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Atlantic County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-atlantic-county-new-jersey-philadelphia-atlantic-city-pa-nj-marginal | Philadelphia-Atlantic City, PA-NJ - (Marginal) | 8-Hour Ozone (2008) | philadelphia-atlantic-city-pa-nj-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Atlantic County | 8-Hour Ozone (2008) | | Philadelphia-Atlantic City, PA-NJ - (Marginal) | NEW JERSEY | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-atlantic-county-new-jersey-philadelphia-atlantic-city-pa-nj-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Baltimore city | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-baltimore-city-maryland-baltimore-md-moderate | Baltimore, MD - (Moderate) | 8-Hour Ozone (2008) | baltimore-md-moderate | https://www3.epa.gov/airquality/greenbook/ancl.html | Baltimore city | 8-Hour Ozone (2008) | | Baltimore, MD - (Moderate) | MARYLAND | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-baltimore-city-maryland-baltimore-md-moderate/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Baltimore County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-baltimore-county-maryland-baltimore-md-moderate | Baltimore, MD - (Moderate) | 8-Hour Ozone (2008) | baltimore-md-moderate | https://www3.epa.gov/airquality/greenbook/ancl.html | Baltimore County | Sulfur Dioxide (2010) | * | Anne Arundel County and Baltimore County, MD | 8-Hour Ozone (2008) | | Baltimore, MD - (Moderate) | MARYLAND | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-baltimore-county-maryland-baltimore-md-moderate/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Beaver County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-beaver-county-pennsylvania-pittsburgh-beaver-valley-pa-marginal | Pittsburgh-Beaver Valley, PA - (Marginal) | 8-Hour Ozone (2008) | pittsburgh-beaver-valley-pa-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Beaver County | Lead (2008) | * | Lower Beaver Valley, PA | 8-Hour Ozone (2008) | | Pittsburgh-Beaver Valley, PA - (Marginal) | PENNSYLVANIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-beaver-county-pennsylvania-pittsburgh-beaver-valley-pa-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Bergen County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-bergen-county-new-jersey-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | 8-Hour Ozone (2008) | new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Bergen County | 8-Hour Ozone (2008) | | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | NEW JERSEY | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-bergen-county-new-jersey-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Berks County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-berks-county-pennsylvania-reading-pa-marginal | Reading, PA - (Marginal) | 8-Hour Ozone (2008) | reading-pa-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Berks County | Lead (2008) | * | Lyons, PA | Lead (2008) | * | North Reading, PA | 8-Hour Ozone (2008) | | Reading, PA - (Marginal) | PENNSYLVANIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-berks-county-pennsylvania-reading-pa-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Boulder County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-boulder-county-colorado-denver-boulder-greeley-ft-collins-loveland-co-severe-15 | Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Severe 15) | 8-Hour Ozone (2008) | denver-boulder-greeley-ft-collins-loveland-co-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Boulder County | 8-Hour Ozone (2008) | | Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Severe 15) | COLORADO | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-boulder-county-colorado-denver-boulder-greeley-ft-collins-loveland-co-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Brazoria County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-brazoria-county-texas-houston-galveston-brazoria-tx-severe-15 | Houston-Galveston-Brazoria, TX - (Severe 15) | 8-Hour Ozone (2008) | houston-galveston-brazoria-tx-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Brazoria County | 8-Hour Ozone (2008) | | Houston-Galveston-Brazoria, TX - (Severe 15) | TEXAS | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-brazoria-county-texas-houston-galveston-brazoria-tx-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Bronx County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-bronx-county-new-york-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | 8-Hour Ozone (2008) | new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Bronx County | 8-Hour Ozone (2008) | | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | NEW YORK | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-bronx-county-new-york-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Broomfield County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-broomfield-county-colorado-denver-boulder-greeley-ft-collins-loveland-co-severe-15 | Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Severe 15) | 8-Hour Ozone (2008) | denver-boulder-greeley-ft-collins-loveland-co-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Broomfield County | 8-Hour Ozone (2008) | | Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Severe 15) | COLORADO | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-broomfield-county-colorado-denver-boulder-greeley-ft-collins-loveland-co-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Bucks County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-bucks-county-pennsylvania-philadelphia-atlantic-city-pa-nj-marginal | Philadelphia-Atlantic City, PA-NJ - (Marginal) | 8-Hour Ozone (2008) | philadelphia-atlantic-city-pa-nj-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Bucks County | 8-Hour Ozone (2008) | | Philadelphia-Atlantic City, PA-NJ - (Marginal) | PENNSYLVANIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-bucks-county-pennsylvania-philadelphia-atlantic-city-pa-nj-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Burlington County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-burlington-county-new-jersey-philadelphia-atlantic-city-pa-nj-marginal | Philadelphia-Atlantic City, PA-NJ - (Marginal) | 8-Hour Ozone (2008) | philadelphia-atlantic-city-pa-nj-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Burlington County | 8-Hour Ozone (2008) | | Philadelphia-Atlantic City, PA-NJ - (Marginal) | NEW JERSEY | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-burlington-county-new-jersey-philadelphia-atlantic-city-pa-nj-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Butler County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-butler-county-pennsylvania-pittsburgh-beaver-valley-pa-marginal | Pittsburgh-Beaver Valley, PA - (Marginal) | 8-Hour Ozone (2008) | pittsburgh-beaver-valley-pa-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Butler County | 8-Hour Ozone (2008) | | Pittsburgh-Beaver Valley, PA - (Marginal) | PENNSYLVANIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-butler-county-pennsylvania-pittsburgh-beaver-valley-pa-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Butte County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-butte-county-california-chico-butte-county-ca-marginal | Chico (Butte County), CA - (Marginal) | 8-Hour Ozone (2008) | chico-butte-county-ca-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Butte County | 8-Hour Ozone (2008) | | Chico (Butte County), CA - (Marginal) | CALIFORNIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-butte-county-california-chico-butte-county-ca-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Calaveras County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-calaveras-county-california-calaveras-county-ca-marginal | Calaveras County, CA - (Marginal) | 8-Hour Ozone (2008) | calaveras-county-ca-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Calaveras County | 8-Hour Ozone (2008) | | Calaveras County, CA - (Marginal) | CALIFORNIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-calaveras-county-california-calaveras-county-ca-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Camden County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-camden-county-new-jersey-philadelphia-atlantic-city-pa-nj-marginal | Philadelphia-Atlantic City, PA-NJ - (Marginal) | 8-Hour Ozone (2008) | philadelphia-atlantic-city-pa-nj-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Camden County | 8-Hour Ozone (2008) | | Philadelphia-Atlantic City, PA-NJ - (Marginal) | NEW JERSEY | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-camden-county-new-jersey-philadelphia-atlantic-city-pa-nj-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Cape May County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-cape-may-county-new-jersey-philadelphia-atlantic-city-pa-nj-marginal | Philadelphia-Atlantic City, PA-NJ - (Marginal) | 8-Hour Ozone (2008) | philadelphia-atlantic-city-pa-nj-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Cape May County | 8-Hour Ozone (2008) | | Philadelphia-Atlantic City, PA-NJ - (Marginal) | NEW JERSEY | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-cape-may-county-new-jersey-philadelphia-atlantic-city-pa-nj-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Carbon County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-carbon-county-pennsylvania-allentown-bethlehem-easton-pa-marginal | Allentown-Bethlehem-Easton, PA - (Marginal) | 8-Hour Ozone (2008) | allentown-bethlehem-easton-pa-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Carbon County | 8-Hour Ozone (2008) | | Allentown-Bethlehem-Easton, PA - (Marginal) | PENNSYLVANIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-carbon-county-pennsylvania-allentown-bethlehem-easton-pa-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Carroll County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-carroll-county-maryland-baltimore-md-moderate | Baltimore, MD - (Moderate) | 8-Hour Ozone (2008) | baltimore-md-moderate | https://www3.epa.gov/airquality/greenbook/ancl.html | Carroll County | 8-Hour Ozone (2008) | | Baltimore, MD - (Moderate) | MARYLAND | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-carroll-county-maryland-baltimore-md-moderate/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Cecil County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-cecil-county-maryland-cecil-county-md-marginal | Cecil County, MD - (Marginal) | 8-Hour Ozone (2008) | cecil-county-md-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Cecil County | 8-Hour Ozone (2008) | | Cecil County, MD - (Marginal) | MARYLAND | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-cecil-county-maryland-cecil-county-md-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Chambers County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-chambers-county-texas-houston-galveston-brazoria-tx-severe-15 | Houston-Galveston-Brazoria, TX - (Severe 15) | 8-Hour Ozone (2008) | houston-galveston-brazoria-tx-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Chambers County | 8-Hour Ozone (2008) | | Houston-Galveston-Brazoria, TX - (Severe 15) | TEXAS | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-chambers-county-texas-houston-galveston-brazoria-tx-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Chautauqua County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-chautauqua-county-new-york-jamestown-ny-marginal | Jamestown, NY - (Marginal) | 8-Hour Ozone (2008) | jamestown-ny-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Chautauqua County | 8-Hour Ozone (2008) | | Jamestown, NY - (Marginal) | NEW YORK | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-chautauqua-county-new-york-jamestown-ny-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Chester County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-chester-county-pennsylvania-philadelphia-atlantic-city-pa-nj-marginal | Philadelphia-Atlantic City, PA-NJ - (Marginal) | 8-Hour Ozone (2008) | philadelphia-atlantic-city-pa-nj-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Chester County | 8-Hour Ozone (2008) | | Philadelphia-Atlantic City, PA-NJ - (Marginal) | PENNSYLVANIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-chester-county-pennsylvania-philadelphia-atlantic-city-pa-nj-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Collin County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-collin-county-texas-dallas-fort-worth-tx-severe-15 | Dallas-Fort Worth, TX - (Severe 15) | 8-Hour Ozone (2008) | dallas-fort-worth-tx-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Collin County | 8-Hour Ozone (2008) | | Dallas-Fort Worth, TX - (Severe 15) | TEXAS | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-collin-county-texas-dallas-fort-worth-tx-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Contra Costa County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-contra-costa-county-california-san-francisco-bay-area-ca-marginal | San Francisco Bay Area, CA - (Marginal) | 8-Hour Ozone (2008) | san-francisco-bay-area-ca-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Contra Costa County | PM-2.5 (2006) | | San Francisco Bay Area, CA - (Moderate) | 8-Hour Ozone (2008) | | San Francisco Bay Area, CA - (Marginal) | CALIFORNIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-contra-costa-county-california-san-francisco-bay-area-ca-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Cumberland County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-cumberland-county-new-jersey-philadelphia-atlantic-city-pa-nj-marginal | Philadelphia-Atlantic City, PA-NJ - (Marginal) | 8-Hour Ozone (2008) | philadelphia-atlantic-city-pa-nj-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Cumberland County | 8-Hour Ozone (2008) | | Philadelphia-Atlantic City, PA-NJ - (Marginal) | NEW JERSEY | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-cumberland-county-new-jersey-philadelphia-atlantic-city-pa-nj-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Dallas County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-dallas-county-texas-dallas-fort-worth-tx-severe-15 | Dallas-Fort Worth, TX - (Severe 15) | 8-Hour Ozone (2008) | dallas-fort-worth-tx-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Dallas County | 8-Hour Ozone (2008) | | Dallas-Fort Worth, TX - (Severe 15) | TEXAS | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-dallas-county-texas-dallas-fort-worth-tx-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Delaware County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-delaware-county-pennsylvania-philadelphia-atlantic-city-pa-nj-marginal | Philadelphia-Atlantic City, PA-NJ - (Marginal) | 8-Hour Ozone (2008) | philadelphia-atlantic-city-pa-nj-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Delaware County | 8-Hour Ozone (2008) | | Philadelphia-Atlantic City, PA-NJ - (Marginal) | PENNSYLVANIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-delaware-county-pennsylvania-philadelphia-atlantic-city-pa-nj-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Denton County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-denton-county-texas-dallas-fort-worth-tx-severe-15 | Dallas-Fort Worth, TX - (Severe 15) | 8-Hour Ozone (2008) | dallas-fort-worth-tx-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Denton County | 8-Hour Ozone (2008) | | Dallas-Fort Worth, TX - (Severe 15) | TEXAS | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-denton-county-texas-dallas-fort-worth-tx-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Denver County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-denver-county-colorado-denver-boulder-greeley-ft-collins-loveland-co-severe-15 | Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Severe 15) | 8-Hour Ozone (2008) | denver-boulder-greeley-ft-collins-loveland-co-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Denver County | 8-Hour Ozone (2008) | | Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Severe 15) | COLORADO | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-denver-county-colorado-denver-boulder-greeley-ft-collins-loveland-co-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Douglas County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-douglas-county-colorado-denver-boulder-greeley-ft-collins-loveland-co-severe-15 | Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Severe 15) | 8-Hour Ozone (2008) | denver-boulder-greeley-ft-collins-loveland-co-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Douglas County | 8-Hour Ozone (2008) | | Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Severe 15) | COLORADO | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-douglas-county-colorado-denver-boulder-greeley-ft-collins-loveland-co-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Dukes County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-dukes-county-massachusetts-dukes-county-ma-marginal | Dukes County, MA - (Marginal) | 8-Hour Ozone (2008) | dukes-county-ma-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Dukes County | 8-Hour Ozone (2008) | | Dukes County, MA - (Marginal) | MASSACHUSETTS | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-dukes-county-massachusetts-dukes-county-ma-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
El Dorado County | July 31, 2026 | [
"partial_county",
"row_id",
"state"
] | 8-hour-ozone-2008-el-dorado-county-california-sacramento-metro-ca-severe-15 | Sacramento Metro, CA - (Severe 15) | 8-Hour Ozone (2008) | sacramento-metro-ca-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | El Dorado County | PM-2.5 (2006) | * | Sacramento, CA - (Moderate) | 8-Hour Ozone (2008) | * | Sacramento Metro, CA - (Severe 15) | CALIFORNIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-el-dorado-county-california-sacramento-metro-ca-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | yes |
Ellis County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-ellis-county-texas-dallas-fort-worth-tx-severe-15 | Dallas-Fort Worth, TX - (Severe 15) | 8-Hour Ozone (2008) | dallas-fort-worth-tx-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Ellis County | 8-Hour Ozone (2008) | | Dallas-Fort Worth, TX - (Severe 15) | TEXAS | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-ellis-county-texas-dallas-fort-worth-tx-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Essex County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-essex-county-new-jersey-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | 8-Hour Ozone (2008) | new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Essex County | 8-Hour Ozone (2008) | | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | NEW JERSEY | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-essex-county-new-jersey-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Fairfield County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-fairfield-county-connecticut-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | 8-Hour Ozone (2008) | new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Fairfield County | 8-Hour Ozone (2008) | | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | CONNECTICUT | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-fairfield-county-connecticut-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Fayette County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-fayette-county-pennsylvania-pittsburgh-beaver-valley-pa-marginal | Pittsburgh-Beaver Valley, PA - (Marginal) | 8-Hour Ozone (2008) | pittsburgh-beaver-valley-pa-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Fayette County | 8-Hour Ozone (2008) | | Pittsburgh-Beaver Valley, PA - (Marginal) | PENNSYLVANIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-fayette-county-pennsylvania-pittsburgh-beaver-valley-pa-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Fort Bend County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-fort-bend-county-texas-houston-galveston-brazoria-tx-severe-15 | Houston-Galveston-Brazoria, TX - (Severe 15) | 8-Hour Ozone (2008) | houston-galveston-brazoria-tx-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Fort Bend County | 8-Hour Ozone (2008) | | Houston-Galveston-Brazoria, TX - (Severe 15) | TEXAS | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-fort-bend-county-texas-houston-galveston-brazoria-tx-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Fresno County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-fresno-county-california-san-joaquin-valley-ca-extreme | San Joaquin Valley, CA - (Extreme) | 8-Hour Ozone (2008) | san-joaquin-valley-ca-extreme | https://www3.epa.gov/airquality/greenbook/ancl.html | Fresno County | PM-2.5 (1997) | | San Joaquin Valley, CA - (Serious) | PM-2.5 (2006) | | San Joaquin Valley, CA - (Serious) | PM-2.5 (2012) | | San Joaquin Valley, CA - (Serious) | 8-Hour Ozone (2008) | | San Joaquin Valley, CA - (Extreme) | CALIFORNIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-fresno-county-california-san-joaquin-valley-ca-extreme/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Galveston County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-galveston-county-texas-houston-galveston-brazoria-tx-severe-15 | Houston-Galveston-Brazoria, TX - (Severe 15) | 8-Hour Ozone (2008) | houston-galveston-brazoria-tx-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Galveston County | 8-Hour Ozone (2008) | | Houston-Galveston-Brazoria, TX - (Severe 15) | TEXAS | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-galveston-county-texas-houston-galveston-brazoria-tx-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Gloucester County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-gloucester-county-new-jersey-philadelphia-atlantic-city-pa-nj-marginal | Philadelphia-Atlantic City, PA-NJ - (Marginal) | 8-Hour Ozone (2008) | philadelphia-atlantic-city-pa-nj-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Gloucester County | 8-Hour Ozone (2008) | | Philadelphia-Atlantic City, PA-NJ - (Marginal) | NEW JERSEY | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-gloucester-county-new-jersey-philadelphia-atlantic-city-pa-nj-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Harford County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-harford-county-maryland-baltimore-md-moderate | Baltimore, MD - (Moderate) | 8-Hour Ozone (2008) | baltimore-md-moderate | https://www3.epa.gov/airquality/greenbook/ancl.html | Harford County | 8-Hour Ozone (2008) | | Baltimore, MD - (Moderate) | MARYLAND | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-harford-county-maryland-baltimore-md-moderate/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Harris County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-harris-county-texas-houston-galveston-brazoria-tx-severe-15 | Houston-Galveston-Brazoria, TX - (Severe 15) | 8-Hour Ozone (2008) | houston-galveston-brazoria-tx-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Harris County | 8-Hour Ozone (2008) | | Houston-Galveston-Brazoria, TX - (Severe 15) | TEXAS | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-harris-county-texas-houston-galveston-brazoria-tx-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Hartford County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-hartford-county-connecticut-greater-connecticut-ct-serious | Greater Connecticut, CT - (Serious) | 8-Hour Ozone (2008) | greater-connecticut-ct-serious | https://www3.epa.gov/airquality/greenbook/ancl.html | Hartford County | 8-Hour Ozone (2008) | | Greater Connecticut, CT - (Serious) | CONNECTICUT | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-hartford-county-connecticut-greater-connecticut-ct-serious/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Howard County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-howard-county-maryland-baltimore-md-moderate | Baltimore, MD - (Moderate) | 8-Hour Ozone (2008) | baltimore-md-moderate | https://www3.epa.gov/airquality/greenbook/ancl.html | Howard County | 8-Hour Ozone (2008) | | Baltimore, MD - (Moderate) | MARYLAND | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-howard-county-maryland-baltimore-md-moderate/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Hudson County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-hudson-county-new-jersey-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | 8-Hour Ozone (2008) | new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Hudson County | 8-Hour Ozone (2008) | | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | NEW JERSEY | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-hudson-county-new-jersey-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Hunterdon County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-hunterdon-county-new-jersey-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | 8-Hour Ozone (2008) | new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Hunterdon County | 8-Hour Ozone (2008) | | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | NEW JERSEY | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-hunterdon-county-new-jersey-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Imperial County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-imperial-county-california-imperial-county-ca-moderate | Imperial County, CA - (Moderate) | 8-Hour Ozone (2008) | imperial-county-ca-moderate | https://www3.epa.gov/airquality/greenbook/ancl.html | Imperial County | PM-2.5 (2006) | * | Imperial County, CA - (Moderate) | PM-2.5 (2012) | * | Imperial County, CA - (Moderate) | 8-Hour Ozone (2008) | | Imperial County, CA - (Moderate) | CALIFORNIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-imperial-county-california-imperial-county-ca-moderate/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Jefferson County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-jefferson-county-colorado-denver-boulder-greeley-ft-collins-loveland-co-severe-15 | Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Severe 15) | 8-Hour Ozone (2008) | denver-boulder-greeley-ft-collins-loveland-co-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Jefferson County | 8-Hour Ozone (2008) | | Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Severe 15) | COLORADO | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-jefferson-county-colorado-denver-boulder-greeley-ft-collins-loveland-co-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Johnson County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-johnson-county-texas-dallas-fort-worth-tx-severe-15 | Dallas-Fort Worth, TX - (Severe 15) | 8-Hour Ozone (2008) | dallas-fort-worth-tx-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Johnson County | 8-Hour Ozone (2008) | | Dallas-Fort Worth, TX - (Severe 15) | TEXAS | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-johnson-county-texas-dallas-fort-worth-tx-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Kaufman County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-kaufman-county-texas-dallas-fort-worth-tx-severe-15 | Dallas-Fort Worth, TX - (Severe 15) | 8-Hour Ozone (2008) | dallas-fort-worth-tx-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Kaufman County | 8-Hour Ozone (2008) | | Dallas-Fort Worth, TX - (Severe 15) | TEXAS | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-kaufman-county-texas-dallas-fort-worth-tx-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Kern County | July 31, 2026 | [
"partial_county",
"row_id",
"state"
] | 8-hour-ozone-2008-kern-county-california-kern-county-eastern-kern-ca-severe-15 | Kern County (Eastern Kern), CA - (Severe 15) | 8-Hour Ozone (2008) | kern-county-eastern-kern-ca-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Kern County | PM-10 (1987) | * | East Kern County, CA - (Serious) | PM-2.5 (1997) | * | San Joaquin Valley, CA - (Serious) | PM-2.5 (2006) | * | San Joaquin Valley, CA - (Serious) | PM-2.5 (2012) | * | San Joaquin Valley, CA - (Serious) | 8-Hour Ozone (2008) | * | Kern County (Eastern Kern), CA - (Severe 15) | CALIFORNIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-kern-county-california-kern-county-eastern-kern-ca-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | yes |
Kern County | July 31, 2026 | [
"partial_county",
"row_id",
"state"
] | 8-hour-ozone-2008-kern-county-california-san-joaquin-valley-ca-extreme | San Joaquin Valley, CA - (Extreme) | 8-Hour Ozone (2008) | san-joaquin-valley-ca-extreme | https://www3.epa.gov/airquality/greenbook/ancl.html | Kern County | PM-10 (1987) | * | East Kern County, CA - (Serious) | PM-2.5 (1997) | * | San Joaquin Valley, CA - (Serious) | PM-2.5 (2006) | * | San Joaquin Valley, CA - (Serious) | PM-2.5 (2012) | * | San Joaquin Valley, CA - (Serious) | 8-Hour Ozone (2008) | * | Kern County (Eastern Kern), CA - (Severe 15) | 8-Hour O... | CALIFORNIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-kern-county-california-san-joaquin-valley-ca-extreme/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | yes |
Kings County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-kings-county-california-san-joaquin-valley-ca-extreme | San Joaquin Valley, CA - (Extreme) | 8-Hour Ozone (2008) | san-joaquin-valley-ca-extreme | https://www3.epa.gov/airquality/greenbook/ancl.html | Kings County | PM-2.5 (1997) | | San Joaquin Valley, CA - (Serious) | PM-2.5 (2006) | | San Joaquin Valley, CA - (Serious) | PM-2.5 (2012) | | San Joaquin Valley, CA - (Serious) | 8-Hour Ozone (2008) | | San Joaquin Valley, CA - (Extreme) | CALIFORNIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-kings-county-california-san-joaquin-valley-ca-extreme/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Kings County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-kings-county-new-york-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | 8-Hour Ozone (2008) | new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Kings County | 8-Hour Ozone (2008) | | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | NEW YORK | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-kings-county-new-york-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Lancaster County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-lancaster-county-pennsylvania-lancaster-pa-marginal | Lancaster, PA - (Marginal) | 8-Hour Ozone (2008) | lancaster-pa-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Lancaster County | 8-Hour Ozone (2008) | | Lancaster, PA - (Marginal) | PENNSYLVANIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-lancaster-county-pennsylvania-lancaster-pa-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Larimer County | July 31, 2026 | [
"partial_county",
"row_id",
"state"
] | 8-hour-ozone-2008-larimer-county-colorado-denver-boulder-greeley-ft-collins-loveland-co-severe-15 | Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Severe 15) | 8-Hour Ozone (2008) | denver-boulder-greeley-ft-collins-loveland-co-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Larimer County | 8-Hour Ozone (2008) | * | Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Severe 15) | COLORADO | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-larimer-county-colorado-denver-boulder-greeley-ft-collins-loveland-co-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | yes |
Lehigh County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-lehigh-county-pennsylvania-allentown-bethlehem-easton-pa-marginal | Allentown-Bethlehem-Easton, PA - (Marginal) | 8-Hour Ozone (2008) | allentown-bethlehem-easton-pa-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Lehigh County | 8-Hour Ozone (2008) | | Allentown-Bethlehem-Easton, PA - (Marginal) | PENNSYLVANIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-lehigh-county-pennsylvania-allentown-bethlehem-easton-pa-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Liberty County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-liberty-county-texas-houston-galveston-brazoria-tx-severe-15 | Houston-Galveston-Brazoria, TX - (Severe 15) | 8-Hour Ozone (2008) | houston-galveston-brazoria-tx-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Liberty County | 8-Hour Ozone (2008) | | Houston-Galveston-Brazoria, TX - (Severe 15) | TEXAS | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-liberty-county-texas-houston-galveston-brazoria-tx-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Lincoln County | July 31, 2026 | [
"partial_county",
"row_id",
"state"
] | 8-hour-ozone-2008-lincoln-county-wyoming-upper-green-river-basin-area-wy-marginal | Upper Green River Basin Area, WY - (Marginal) | 8-Hour Ozone (2008) | upper-green-river-basin-area-wy-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Lincoln County | 8-Hour Ozone (2008) | * | Upper Green River Basin Area, WY - (Marginal) | WYOMING | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-lincoln-county-wyoming-upper-green-river-basin-area-wy-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | yes |
Litchfield County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-litchfield-county-connecticut-greater-connecticut-ct-serious | Greater Connecticut, CT - (Serious) | 8-Hour Ozone (2008) | greater-connecticut-ct-serious | https://www3.epa.gov/airquality/greenbook/ancl.html | Litchfield County | 8-Hour Ozone (2008) | | Greater Connecticut, CT - (Serious) | CONNECTICUT | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-litchfield-county-connecticut-greater-connecticut-ct-serious/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Los Angeles County | July 31, 2026 | [
"partial_county",
"row_id",
"state"
] | 8-hour-ozone-2008-los-angeles-county-california-los-angeles-san-bernardino-counties-west-mojave-desert-ca-severe-15 | Los Angeles-San Bernardino Counties (West Mojave Desert), CA - (Severe 15) | 8-Hour Ozone (2008) | los-angeles-san-bernardino-counties-west-mojave-desert-ca-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Los Angeles County | Lead (2008) | * | Los Angeles County-South Coast Air Basin, CA | PM-2.5 (1997) | * | Los Angeles-South Coast Air Basin, CA - (Moderate) | PM-2.5 (2006) | * | Los Angeles-South Coast Air Basin, CA - (Serious) | PM-2.5 (2012) | * | Los Angeles-South Coast Air Basin, CA - (Serious) | 8-Hour Ozone (200... | CALIFORNIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-los-angeles-county-california-los-angeles-san-bernardino-counties-west-mojave-desert-ca-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | yes |
Los Angeles County | July 31, 2026 | [
"partial_county",
"row_id",
"state"
] | 8-hour-ozone-2008-los-angeles-county-california-los-angeles-south-coast-air-basin-ca-extreme | Los Angeles-South Coast Air Basin, CA - (Extreme) | 8-Hour Ozone (2008) | los-angeles-south-coast-air-basin-ca-extreme | https://www3.epa.gov/airquality/greenbook/ancl.html | Los Angeles County | Lead (2008) | * | Los Angeles County-South Coast Air Basin, CA | PM-2.5 (1997) | * | Los Angeles-South Coast Air Basin, CA - (Moderate) | PM-2.5 (2006) | * | Los Angeles-South Coast Air Basin, CA - (Serious) | PM-2.5 (2012) | * | Los Angeles-South Coast Air Basin, CA - (Serious) | 8-Hour Ozone (200... | CALIFORNIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-los-angeles-county-california-los-angeles-south-coast-air-basin-ca-extreme/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | yes |
Madera County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-madera-county-california-san-joaquin-valley-ca-extreme | San Joaquin Valley, CA - (Extreme) | 8-Hour Ozone (2008) | san-joaquin-valley-ca-extreme | https://www3.epa.gov/airquality/greenbook/ancl.html | Madera County | PM-2.5 (1997) | | San Joaquin Valley, CA - (Serious) | PM-2.5 (2006) | | San Joaquin Valley, CA - (Serious) | PM-2.5 (2012) | | San Joaquin Valley, CA - (Serious) | 8-Hour Ozone (2008) | | San Joaquin Valley, CA - (Extreme) | CALIFORNIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-madera-county-california-san-joaquin-valley-ca-extreme/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Maricopa County | July 31, 2026 | [
"partial_county",
"row_id",
"state"
] | 8-hour-ozone-2008-maricopa-county-arizona-phoenix-mesa-az-moderate | Phoenix-Mesa, AZ - (Moderate) | 8-Hour Ozone (2008) | phoenix-mesa-az-moderate | https://www3.epa.gov/airquality/greenbook/ancl.html | Maricopa County | PM-10 (1987) | * | Maricopa and Pinal Counties; Phoenix planning area, AZ - (Serious) | 8-Hour Ozone (2008) | * | Phoenix-Mesa, AZ - (Moderate) | ARIZONA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-maricopa-county-arizona-phoenix-mesa-az-moderate/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | yes |
Marin County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-marin-county-california-san-francisco-bay-area-ca-marginal | San Francisco Bay Area, CA - (Marginal) | 8-Hour Ozone (2008) | san-francisco-bay-area-ca-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Marin County | PM-2.5 (2006) | | San Francisco Bay Area, CA - (Moderate) | 8-Hour Ozone (2008) | | San Francisco Bay Area, CA - (Marginal) | CALIFORNIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-marin-county-california-san-francisco-bay-area-ca-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Mariposa County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-mariposa-county-california-mariposa-county-ca-moderate | Mariposa County, CA - (Moderate) | 8-Hour Ozone (2008) | mariposa-county-ca-moderate | https://www3.epa.gov/airquality/greenbook/ancl.html | Mariposa County | 8-Hour Ozone (2008) | | Mariposa County, CA - (Moderate) | CALIFORNIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-mariposa-county-california-mariposa-county-ca-moderate/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Merced County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-merced-county-california-san-joaquin-valley-ca-extreme | San Joaquin Valley, CA - (Extreme) | 8-Hour Ozone (2008) | san-joaquin-valley-ca-extreme | https://www3.epa.gov/airquality/greenbook/ancl.html | Merced County | PM-2.5 (1997) | | San Joaquin Valley, CA - (Serious) | PM-2.5 (2006) | | San Joaquin Valley, CA - (Serious) | PM-2.5 (2012) | | San Joaquin Valley, CA - (Serious) | 8-Hour Ozone (2008) | | San Joaquin Valley, CA - (Extreme) | CALIFORNIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-merced-county-california-san-joaquin-valley-ca-extreme/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Mercer County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-mercer-county-new-jersey-philadelphia-atlantic-city-pa-nj-marginal | Philadelphia-Atlantic City, PA-NJ - (Marginal) | 8-Hour Ozone (2008) | philadelphia-atlantic-city-pa-nj-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Mercer County | 8-Hour Ozone (2008) | | Philadelphia-Atlantic City, PA-NJ - (Marginal) | NEW JERSEY | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-mercer-county-new-jersey-philadelphia-atlantic-city-pa-nj-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Middlesex County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-middlesex-county-connecticut-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | 8-Hour Ozone (2008) | new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Middlesex County | 8-Hour Ozone (2008) | | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | CONNECTICUT | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-middlesex-county-connecticut-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Middlesex County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-middlesex-county-new-jersey-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | 8-Hour Ozone (2008) | new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Middlesex County | 8-Hour Ozone (2008) | | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | NEW JERSEY | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-middlesex-county-new-jersey-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Monmouth County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-monmouth-county-new-jersey-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | 8-Hour Ozone (2008) | new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Monmouth County | 8-Hour Ozone (2008) | | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | NEW JERSEY | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-monmouth-county-new-jersey-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Montgomery County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-montgomery-county-pennsylvania-philadelphia-atlantic-city-pa-nj-marginal | Philadelphia-Atlantic City, PA-NJ - (Marginal) | 8-Hour Ozone (2008) | philadelphia-atlantic-city-pa-nj-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Montgomery County | 8-Hour Ozone (2008) | | Philadelphia-Atlantic City, PA-NJ - (Marginal) | PENNSYLVANIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-montgomery-county-pennsylvania-philadelphia-atlantic-city-pa-nj-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Montgomery County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-montgomery-county-texas-houston-galveston-brazoria-tx-severe-15 | Houston-Galveston-Brazoria, TX - (Severe 15) | 8-Hour Ozone (2008) | houston-galveston-brazoria-tx-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Montgomery County | 8-Hour Ozone (2008) | | Houston-Galveston-Brazoria, TX - (Severe 15) | TEXAS | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-montgomery-county-texas-houston-galveston-brazoria-tx-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Morris County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-morris-county-new-jersey-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | 8-Hour Ozone (2008) | new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Morris County | 8-Hour Ozone (2008) | | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | NEW JERSEY | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-morris-county-new-jersey-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Napa County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-napa-county-california-san-francisco-bay-area-ca-marginal | San Francisco Bay Area, CA - (Marginal) | 8-Hour Ozone (2008) | san-francisco-bay-area-ca-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Napa County | PM-2.5 (2006) | | San Francisco Bay Area, CA - (Moderate) | 8-Hour Ozone (2008) | | San Francisco Bay Area, CA - (Marginal) | CALIFORNIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-napa-county-california-san-francisco-bay-area-ca-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Nassau County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-nassau-county-new-york-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | 8-Hour Ozone (2008) | new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Nassau County | 8-Hour Ozone (2008) | | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | NEW YORK | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-nassau-county-new-york-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Nevada County | July 31, 2026 | [
"partial_county",
"row_id",
"state"
] | 8-hour-ozone-2008-nevada-county-california-nevada-county-western-part-ca-serious | Nevada County (Western part), CA - (Serious) | 8-Hour Ozone (2008) | nevada-county-western-part-ca-serious | https://www3.epa.gov/airquality/greenbook/ancl.html | Nevada County | 8-Hour Ozone (2008) | * | Nevada County (Western part), CA - (Serious) | CALIFORNIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-nevada-county-california-nevada-county-western-part-ca-serious/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | yes |
New Castle County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-new-castle-county-delaware-new-castle-county-de-marginal | New Castle County, DE - (Marginal) | 8-Hour Ozone (2008) | new-castle-county-de-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | New Castle County | 8-Hour Ozone (2008) | | New Castle County, DE - (Marginal) | DELAWARE | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-new-castle-county-delaware-new-castle-county-de-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
New Haven County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-new-haven-county-connecticut-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | 8-Hour Ozone (2008) | new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | New Haven County | 8-Hour Ozone (2008) | | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | CONNECTICUT | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-new-haven-county-connecticut-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
New London County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-new-london-county-connecticut-greater-connecticut-ct-serious | Greater Connecticut, CT - (Serious) | 8-Hour Ozone (2008) | greater-connecticut-ct-serious | https://www3.epa.gov/airquality/greenbook/ancl.html | New London County | 8-Hour Ozone (2008) | | Greater Connecticut, CT - (Serious) | CONNECTICUT | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-new-london-county-connecticut-greater-connecticut-ct-serious/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
New York County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-new-york-county-new-york-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | 8-Hour Ozone (2008) | new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | New York County | PM-10 (1987) | | New York County, NY - (Moderate) | 8-Hour Ozone (2008) | | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | NEW YORK | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-new-york-county-new-york-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Northampton County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-northampton-county-pennsylvania-allentown-bethlehem-easton-pa-marginal | Allentown-Bethlehem-Easton, PA - (Marginal) | 8-Hour Ozone (2008) | allentown-bethlehem-easton-pa-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Northampton County | 8-Hour Ozone (2008) | | Allentown-Bethlehem-Easton, PA - (Marginal) | PENNSYLVANIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-northampton-county-pennsylvania-allentown-bethlehem-easton-pa-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Ocean County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-ocean-county-new-jersey-philadelphia-atlantic-city-pa-nj-marginal | Philadelphia-Atlantic City, PA-NJ - (Marginal) | 8-Hour Ozone (2008) | philadelphia-atlantic-city-pa-nj-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Ocean County | 8-Hour Ozone (2008) | | Philadelphia-Atlantic City, PA-NJ - (Marginal) | NEW JERSEY | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-ocean-county-new-jersey-philadelphia-atlantic-city-pa-nj-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Orange County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-orange-county-california-los-angeles-south-coast-air-basin-ca-extreme | Los Angeles-South Coast Air Basin, CA - (Extreme) | 8-Hour Ozone (2008) | los-angeles-south-coast-air-basin-ca-extreme | https://www3.epa.gov/airquality/greenbook/ancl.html | Orange County | PM-2.5 (1997) | | Los Angeles-South Coast Air Basin, CA - (Moderate) | PM-2.5 (2006) | | Los Angeles-South Coast Air Basin, CA - (Serious) | PM-2.5 (2012) | | Los Angeles-South Coast Air Basin, CA - (Serious) | 8-Hour Ozone (2008) | | Los Angeles-South Coast Air Basin, CA - (Extreme) | CALIFORNIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-orange-county-california-los-angeles-south-coast-air-basin-ca-extreme/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Parker County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-parker-county-texas-dallas-fort-worth-tx-severe-15 | Dallas-Fort Worth, TX - (Severe 15) | 8-Hour Ozone (2008) | dallas-fort-worth-tx-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Parker County | 8-Hour Ozone (2008) | | Dallas-Fort Worth, TX - (Severe 15) | TEXAS | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-parker-county-texas-dallas-fort-worth-tx-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Passaic County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-passaic-county-new-jersey-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | 8-Hour Ozone (2008) | new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Passaic County | 8-Hour Ozone (2008) | | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | NEW JERSEY | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-passaic-county-new-jersey-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Philadelphia County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-philadelphia-county-pennsylvania-philadelphia-atlantic-city-pa-nj-marginal | Philadelphia-Atlantic City, PA-NJ - (Marginal) | 8-Hour Ozone (2008) | philadelphia-atlantic-city-pa-nj-marginal | https://www3.epa.gov/airquality/greenbook/ancl.html | Philadelphia County | 8-Hour Ozone (2008) | | Philadelphia-Atlantic City, PA-NJ - (Marginal) | PENNSYLVANIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-philadelphia-county-pennsylvania-philadelphia-atlantic-city-pa-nj-marginal/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Pinal County | July 31, 2026 | [
"partial_county",
"row_id",
"state"
] | 8-hour-ozone-2008-pinal-county-arizona-phoenix-mesa-az-moderate | Phoenix-Mesa, AZ - (Moderate) | 8-Hour Ozone (2008) | phoenix-mesa-az-moderate | https://www3.epa.gov/airquality/greenbook/ancl.html | Pinal County | Lead (2008) | * | Hayden, AZ | PM-10 (1987) | * | Hayden, AZ - (Moderate) | PM-10 (1987) | * | Maricopa and Pinal Counties; Phoenix planning area, AZ - (Serious) | PM-10 (1987) | * | Miami, AZ - (Moderate) | PM-10 (1987) | * | Pinal County (part); West Pinal, AZ - (Serious) | PM-2.5 (2006) | * | West Cen... | ARIZONA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-pinal-county-arizona-phoenix-mesa-az-moderate/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | yes |
Placer County | July 31, 2026 | [
"partial_county",
"row_id",
"state"
] | 8-hour-ozone-2008-placer-county-california-sacramento-metro-ca-severe-15 | Sacramento Metro, CA - (Severe 15) | 8-Hour Ozone (2008) | sacramento-metro-ca-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Placer County | PM-2.5 (2006) | * | Sacramento, CA - (Moderate) | 8-Hour Ozone (2008) | * | Sacramento Metro, CA - (Severe 15) | CALIFORNIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-placer-county-california-sacramento-metro-ca-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | yes |
Queens County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-queens-county-new-york-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | 8-Hour Ozone (2008) | new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Queens County | 8-Hour Ozone (2008) | | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | NEW YORK | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-queens-county-new-york-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Richmond County | July 31, 2026 | [
"row_id",
"state"
] | 8-hour-ozone-2008-richmond-county-new-york-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | 8-Hour Ozone (2008) | new-york-n-new-jersey-long-island-ny-nj-ct-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Richmond County | 8-Hour Ozone (2008) | | New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 15) | NEW YORK | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-richmond-county-new-york-new-york-n-new-jersey-long-island-ny-nj-ct-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | null |
Riverside County | July 31, 2026 | [
"partial_county",
"row_id",
"state"
] | 8-hour-ozone-2008-riverside-county-california-los-angeles-south-coast-air-basin-ca-extreme | Los Angeles-South Coast Air Basin, CA - (Extreme) | 8-Hour Ozone (2008) | los-angeles-south-coast-air-basin-ca-extreme | https://www3.epa.gov/airquality/greenbook/ancl.html | Riverside County | PM-10 (1987) | * | Riverside County; Coachella Valley planning area, CA - (Serious) | PM-2.5 (1997) | * | Los Angeles-South Coast Air Basin, CA - (Moderate) | PM-2.5 (2006) | * | Los Angeles-South Coast Air Basin, CA - (Serious) | PM-2.5 (2012) | * | Los Angeles-South Coast Air Basin, CA - (Serious) ... | CALIFORNIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-riverside-county-california-los-angeles-south-coast-air-basin-ca-extreme/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | yes |
Riverside County | July 31, 2026 | [
"partial_county",
"row_id",
"state"
] | 8-hour-ozone-2008-riverside-county-california-morongo-band-of-mission-indians-ca-severe-15 | Morongo Band of Mission Indians, CA - (Severe 15) | 8-Hour Ozone (2008) | morongo-band-of-mission-indians-ca-severe-15 | https://www3.epa.gov/airquality/greenbook/ancl.html | Riverside County | PM-10 (1987) | * | Riverside County; Coachella Valley planning area, CA - (Serious) | PM-2.5 (1997) | * | Los Angeles-South Coast Air Basin, CA - (Moderate) | PM-2.5 (2006) | * | Los Angeles-South Coast Air Basin, CA - (Serious) | PM-2.5 (2012) | * | Los Angeles-South Coast Air Basin, CA - (Serious) ... | CALIFORNIA | https://referencesource.org/nonattainment-county-designations-by-pollutant/8-hour-ozone-2008-riverside-county-california-morongo-band-of-mission-indians-ca-severe-15/ | [
"county",
"data_as_of",
"nonattainment_area_name",
"pollutant_naaqs"
] | yes |
End of preview. Expand in Data Studio
Current EPA nonattainment county designations by pollutant
Canonical, always-current version: https://referencesource.org/nonattainment-county-designations-by-pollutant/ Machine-readable: https://referencesource.org/nonattainment-county-designations-by-pollutant/data.json — this mirror is a point-in-time copy.
- Last verified: 2026-08-24
- Stale after: 2027-02-20 (past this date, prefer the canonical copy — it re-verifies on a cadence this snapshot does not)
- Records: 463
Whether a US county is in 'nonattainment' for a given Clean Air Act pollutant (and if so, at what severity classification) drives real obligations for anyone building, permitting, or selling into that county: stricter new-source review, vehicle inspection and reformulated-fuel requirements, and federal highway-funding conditions all key off this status. EPA's Green Book is the single authoritative list, but it is a very long plain-text table with no per-county lookup and no API — a resident, contractor, or small manufacturer has to scan hundreds of rows by hand to find their county. Each record is one county x one pollutant NAAQS combination: whether it is designated nonattainment, the classification if the pollutant test has one (Marginal through Extreme for ozone; Moderate/Serious for PM), and the named nonattainment area it belongs to. Answers 'is [county] in nonattainment for ozone', 'what classification is [county] for PM-2.5', 'does building in [county] trigger nonattainment-area permitting'.
Provenance — what every record carries
Every record carries source (the URL the value was read from) and
source_quote (a verbatim quote from that page stating it). A value you
cannot check against its page is indistinguishable from an invented one;
these can all be checked. Each record is also individually addressable on
the canonical site at its url.
Licence position
US federal government work, no copyright (17 USC 105)
Facts are not copyrightable; what this dataset takes from each source is a fact plus a short attributed quote linking back to the page that states it.
Sources
Fields
See any record in data/records.jsonl — field names are self-describing,
and the canonical page for each record renders them with labels:
https://referencesource.org/nonattainment-county-designations-by-pollutant/
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