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1-Hour Ozone (1979) Designated Areas by State/County/Area - NAAQS Revoked
1-Hour Ozone (1979) Designated Areas by State/County/Area - NAAQS Revoked
Data is current as of December 31, 2024Click underlined column heading to change report order
| State | County | Area Name | Current Status | County NA Whole/Part |
2010 Population |
State/ County FIPS |
|---|---|---|---|---|---|---|
| click link for partial county description |
whole or partial county population |
|||||
| ALABAMA | Jefferson County | Birmingham, AL | Maintenance | Whole | 658,466 | 01/073 |
| ALABAMA | Shelby County | Birmingham, AL | Maintenance | Whole | 195,085 | 01/117 |
| ARIZONA | Maricopa County | Phoenix, AZ | Maintenance | Part | 3,763,324 | 04/013 |
| CALIFORNIA | Alameda County | San Francisco-Bay Area, CA | Nonattainment | Whole | 1,510,271 | 06/001 |
| CALIFORNIA | Butte County | Chico, CA | Nonattainment | Whole | 220,000 | 06/007 |
| CALIFORNIA | Contra Costa County | San Francisco-Bay Area, CA | Nonattainment | Whole | 1,049,025 | 06/013 |
| CALIFORNIA | El Dorado County | Sacramento Metro, CA | Nonattainment | Part | 143,832 | 06/017 |
| CALIFORNIA | Fresno County | San Joaquin Valley, CA | Nonattainment | Whole | 930,450 | 06/019 |
| CALIFORNIA | Imperial County | Imperial County, CA | Nonattainment | Whole | 174,528 | 06/025 |
| CALIFORNIA | Kern County | East Kern County, CA | Maintenance | Part | 141,398 | 06/029 |
| CALIFORNIA | Kern County | San Joaquin Valley, CA | Nonattainment | Part | 698,229 | 06/029 |
| CALIFORNIA | Kings County | San Joaquin Valley, CA | Nonattainment | Whole | 152,982 | 06/031 |
| CALIFORNIA | Los Angeles County | Los Angeles-South Coast Air Basin, CA | Nonattainment | Part | 9,512,219 | 06/037 |
| CALIFORNIA | Los Angeles County | Southeast Desert Modified AQMA, CA | Nonattainment | Part | 306,386 | 06/037 |
| CALIFORNIA | Madera County | San Joaquin Valley, CA | Nonattainment | Whole | 150,865 | 06/039 |
| CALIFORNIA | Marin County | San Francisco-Bay Area, CA | Nonattainment | Whole | 252,409 | 06/041 |
| CALIFORNIA | Merced County | San Joaquin Valley, CA | Nonattainment | Whole | 255,793 | 06/047 |
| CALIFORNIA | Monterey County | Monterey Bay, CA | Maintenance | Whole | 415,057 | 06/053 |
| CALIFORNIA | Napa County | San Francisco-Bay Area, CA | Nonattainment | Whole | 136,484 | 06/055 |
| CALIFORNIA | Orange County | Los Angeles-South Coast Air Basin, CA | Nonattainment | Whole | 3,010,232 | 06/059 |
| CALIFORNIA | Placer County | Sacramento Metro, CA | Nonattainment | Part | 336,617 | 06/061 |
| CALIFORNIA | Riverside County | Los Angeles-South Coast Air Basin, CA | Nonattainment | Part | 1,692,083 | 06/065 |
| CALIFORNIA | Riverside County | Morongo Band of Mission Indians, CA | Nonattainment | Part | 913 | 06/065 |
| CALIFORNIA | Riverside County | Southeast Desert Modified AQMA, CA | Nonattainment | Part | 460,138 | 06/065 |
| CALIFORNIA | Sacramento County | Sacramento Metro, CA | Nonattainment | Whole | 1,418,788 | 06/067 |
| CALIFORNIA | San Benito County | Monterey Bay, CA | Maintenance | Whole | 55,269 | 06/069 |
| CALIFORNIA | San Bernardino County | Los Angeles-South Coast Air Basin, CA | Nonattainment | Part | 1,583,657 | 06/071 |
| CALIFORNIA | San Bernardino County | Southeast Desert Modified AQMA, CA | Nonattainment | Part | 427,842 | 06/071 |
| CALIFORNIA | San Diego County | San Diego, CA | Maintenance | Whole | 3,095,313 | 06/073 |
| CALIFORNIA | San Francisco County | San Francisco-Bay Area, CA | Nonattainment | Whole | 805,235 | 06/075 |
| CALIFORNIA | San Joaquin County | San Joaquin Valley, CA | Nonattainment | Whole | 685,306 | 06/077 |
| CALIFORNIA | San Mateo County | San Francisco-Bay Area, CA | Nonattainment | Whole | 718,451 | 06/081 |
| CALIFORNIA | Santa Barbara County | Santa Barbara-Santa Maria-Lompoc, CA | Maintenance | Whole | 423,895 | 06/083 |
| CALIFORNIA | Santa Clara County | San Francisco-Bay Area, CA | Nonattainment | Whole | 1,781,642 | 06/085 |
| CALIFORNIA | Santa Cruz County | Monterey Bay, CA | Maintenance | Whole | 262,382 | 06/087 |
| CALIFORNIA | Solano County | Sacramento Metro, CA | Nonattainment | Part | 206,433 | 06/095 |
| CALIFORNIA | Solano County | San Francisco-Bay Area, CA | Nonattainment | Part | 206,929 | 06/095 |
| CALIFORNIA | Sonoma County | San Francisco-Bay Area, CA | Nonattainment | Part | 436,512 | 06/097 |
| CALIFORNIA | Stanislaus County | San Joaquin Valley, CA | Nonattainment | Whole | 514,453 | 06/099 |
| CALIFORNIA | Sutter County | Sacramento Metro, CA | Nonattainment | Part | 30,023 | 06/101 |
| CALIFORNIA | Sutter County | Yuba City, CA | Nonattainment | Part | 64,717 | 06/101 |
| CALIFORNIA | Tulare County | San Joaquin Valley, CA | Nonattainment | Whole | 442,179 | 06/107 |
| CALIFORNIA | Ventura County | Ventura County, CA | Nonattainment | Whole | 823,318 | 06/111 |
| CALIFORNIA | Yolo County | Sacramento Metro, CA | Nonattainment | Whole | 200,849 | 06/113 |
| CALIFORNIA | Yuba County | Yuba City, CA | Nonattainment | Whole | 72,155 | 06/115 |
| COLORADO | Adams County | Denver-Boulder, CO | Maintenance | Part | 432,838 | 08/001 |
| COLORADO | Arapahoe County | Denver-Boulder, CO | Maintenance | Part | 567,075 | 08/005 |
| COLORADO | Boulder County | Denver-Boulder, CO | Maintenance | Part | 294,556 | 08/013 |
| COLORADO | Broomfield County | Denver-Boulder, CO | Maintenance | Whole | 55,889 | 08/014 |
| COLORADO | Denver County | Denver-Boulder, CO | Maintenance | Whole | 600,158 | 08/031 |
| COLORADO | Douglas County | Denver-Boulder, CO | Maintenance | Whole | 285,465 | 08/035 |
| COLORADO | Jefferson County | Denver-Boulder, CO | Maintenance | Whole | 534,543 | 08/059 |
| CONNECTICUT | Fairfield County | Greater Connecticut, CT | Nonattainment | Part | 39,559 | 09/001 |
| CONNECTICUT | Fairfield County | New York-N. New Jersey-Long Island, NY-NJ-CT | Nonattainment | Part | 877,270 | 09/001 |
| CONNECTICUT | Hartford County | Greater Connecticut, CT | Nonattainment | Whole | 894,014 | 09/003 |
| CONNECTICUT | Litchfield County | Greater Connecticut, CT | Nonattainment | Part | 160,058 | 09/005 |
| CONNECTICUT | Litchfield County | New York-N. New Jersey-Long Island, NY-NJ-CT | Nonattainment | Part | 30,172 | 09/005 |
| CONNECTICUT | Middlesex County | Greater Connecticut, CT | Nonattainment | Whole | 165,676 | 09/007 |
| CONNECTICUT | New Haven County | Greater Connecticut, CT | Nonattainment | Whole | 862,477 | 09/009 |
| CONNECTICUT | New London County | Greater Connecticut, CT | Nonattainment | Whole | 274,055 | 09/011 |
| CONNECTICUT | Tolland County | Greater Connecticut, CT | Nonattainment | Whole | 152,691 | 09/013 |
| CONNECTICUT | Windham County | Greater Connecticut, CT | Nonattainment | Whole | 118,428 | 09/015 |
| DELAWARE | Kent County | Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD | Nonattainment | Whole | 162,310 | 10/001 |
| DELAWARE | New Castle County | Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD | Nonattainment | Whole | 538,479 | 10/003 |
| DELAWARE | Sussex County | Sussex County, DE | Nonattainment | Whole | 197,145 | 10/005 |
| DISTRICT OF COLUMBIA | District of Columbia | Washington, DC-MD-VA | Nonattainment | Whole | 601,723 | 11/001 |
| FLORIDA | Broward County | Miami-Fort Lauderdale-W. Palm Beach, FL | Maintenance | Whole | 1,748,066 | 12/011 |
| FLORIDA | Duval County | Jacksonville, FL | Maintenance | Whole | 864,263 | 12/031 |
| FLORIDA | Hillsborough County | Tampa-St. Petersburg-Clearwater, FL | Maintenance | Whole | 1,229,226 | 12/057 |
| FLORIDA | Miami-Dade County | Miami-Fort Lauderdale-W. Palm Beach, FL | Maintenance | Whole | 2,496,435 | 12/086 |
| FLORIDA | Palm Beach County | Miami-Fort Lauderdale-W. Palm Beach, FL | Maintenance | Whole | 1,320,134 | 12/099 |
| FLORIDA | Pinellas County | Tampa-St. Petersburg-Clearwater, FL | Maintenance | Whole | 916,542 | 12/103 |
| GEORGIA | Cherokee County | Atlanta, GA | Maintenance | Whole | 214,346 | 13/057 |
| GEORGIA | Clayton County | Atlanta, GA | Maintenance | Whole | 259,424 | 13/063 |
| GEORGIA | Cobb County | Atlanta, GA | Maintenance | Whole | 688,078 | 13/067 |
| GEORGIA | Coweta County | Atlanta, GA | Maintenance | Whole | 127,317 | 13/077 |
| GEORGIA | DeKalb County | Atlanta, GA | Maintenance | Whole | 691,893 | 13/089 |
| GEORGIA | Douglas County | Atlanta, GA | Maintenance | Whole | 132,403 | 13/097 |
| GEORGIA | Fayette County | Atlanta, GA | Maintenance | Whole | 106,567 | 13/113 |
| GEORGIA | Forsyth County | Atlanta, GA | Maintenance | Whole | 175,511 | 13/117 |
| GEORGIA | Fulton County | Atlanta, GA | Maintenance | Whole | 920,581 | 13/121 |
| GEORGIA | Gwinnett County | Atlanta, GA | Maintenance | Whole | 805,321 | 13/135 |
| GEORGIA | Henry County | Atlanta, GA | Maintenance | Whole | 203,922 | 13/151 |
| GEORGIA | Paulding County | Atlanta, GA | Maintenance | Whole | 142,324 | 13/223 |
| GEORGIA | Rockdale County | Atlanta, GA | Maintenance | Whole | 85,215 | 13/247 |
| ILLINOIS | Cook County | Chicago-Gary-Lake County, IL-IN | Nonattainment | Whole | 5,194,675 | 17/031 |
| ILLINOIS | DuPage County | Chicago-Gary-Lake County, IL-IN | Nonattainment | Whole | 916,924 | 17/043 |
| ILLINOIS | Grundy County | Chicago-Gary-Lake County, IL-IN | Nonattainment | Part | 14,735 | 17/063 |
| ILLINOIS | Jersey County | Jersey County, IL | Maintenance | Whole | 22,985 | 17/083 |
| ILLINOIS | Kane County | Chicago-Gary-Lake County, IL-IN | Nonattainment | Whole | 515,269 | 17/089 |
| ILLINOIS | Kendall County | Chicago-Gary-Lake County, IL-IN | Nonattainment | Part | 30,355 | 17/093 |
| ILLINOIS | Lake County | Chicago-Gary-Lake County, IL-IN | Nonattainment | Whole | 703,462 | 17/097 |
| ILLINOIS | Madison County | St. Louis, MO-IL | Maintenance | Whole | 269,282 | 17/119 |
| ILLINOIS | McHenry County | Chicago-Gary-Lake County, IL-IN | Nonattainment | Whole | 308,760 | 17/111 |
| ILLINOIS | Monroe County | St. Louis, MO-IL | Maintenance | Whole | 32,957 | 17/133 |
| ILLINOIS | St. Clair County | St. Louis, MO-IL | Maintenance | Whole | 270,056 | 17/163 |
| ILLINOIS | Will County | Chicago-Gary-Lake County, IL-IN | Nonattainment | Whole | 677,560 | 17/197 |
| INDIANA | Clark County | Louisville, KY-IN | Maintenance | Whole | 110,232 | 18/019 |
| INDIANA | Elkhart County | South Bend-Elkhart, IN | Maintenance | Whole | 197,559 | 18/039 |
| INDIANA | Floyd County | Louisville, KY-IN | Maintenance | Whole | 74,578 | 18/043 |
| INDIANA | Lake County | Chicago-Gary-Lake County, IL-IN | Nonattainment | Whole | 496,005 | 18/089 |
| INDIANA | Marion County | Indianapolis, IN | Maintenance | Whole | 903,393 | 18/097 |
| INDIANA | Porter County | Chicago-Gary-Lake County, IL-IN | Nonattainment | Whole | 164,343 | 18/127 |
| INDIANA | St. Joseph County | South Bend-Elkhart, IN | Maintenance | Whole | 266,931 | 18/141 |
| INDIANA | Vanderburgh County | Evansville, IN | Maintenance | Whole | 179,703 | 18/163 |
| KANSAS | Johnson County | Kansas City, MO-KS | Maintenance | Whole | 544,179 | 20/091 |
| KANSAS | Wyandotte County | Kansas City, MO-KS | Maintenance | Whole | 157,505 | 20/209 |
| KENTUCKY | Boone County | Cincinnati-Hamilton, OH-KY | Maintenance | Whole | 118,811 | 21/015 |
| KENTUCKY | Boyd County | Huntington-Ashland, WV-KY | Maintenance | Whole | 49,542 | 21/019 |
| KENTUCKY | Bullitt County | Louisville, KY-IN | Maintenance | Part | 17,539 | 21/029 |
| KENTUCKY | Campbell County | Cincinnati-Hamilton, OH-KY | Maintenance | Whole | 90,336 | 21/037 |
| KENTUCKY | Daviess County | Owensboro, KY | Maintenance | Whole | 96,656 | 21/059 |
| KENTUCKY | Edmonson County | Edmonson County, KY | Maintenance | Whole | 12,161 | 21/061 |
| KENTUCKY | Fayette County | Lexington-Fayette, KY | Maintenance | Whole | 295,803 | 21/067 |
| KENTUCKY | Greenup County | Huntington-Ashland, WV-KY | Maintenance | Part | 17,134 | 21/089 |
| KENTUCKY | Hancock County | Owensboro, KY | Maintenance | Part | 861 | 21/091 |
| KENTUCKY | Jefferson County | Louisville, KY-IN | Maintenance | Whole | 741,096 | 21/111 |
| KENTUCKY | Kenton County | Cincinnati-Hamilton, OH-KY | Maintenance | Whole | 159,720 | 21/117 |
| KENTUCKY | Livingston County | Paducah, KY | Maintenance | Part | 1,242 | 21/139 |
| KENTUCKY | Marshall County | Paducah, KY | Maintenance | Whole | 31,448 | 21/157 |
| KENTUCKY | Oldham County | Louisville, KY-IN | Maintenance | Part | 10,447 | 21/185 |
| KENTUCKY | Scott County | Lexington-Fayette, KY | Maintenance | Whole | 47,173 | 21/209 |
| LOUISIANA | Ascension Parish | Baton Rouge, LA | Nonattainment | Whole | 107,215 | 22/005 |
| LOUISIANA | Beauregard Parish | Beauregard Parish, LA | Maintenance | Whole | 35,654 | 22/011 |
| LOUISIANA | Calcasieu Parish | Lake Charles, LA | Maintenance | Whole | 192,768 | 22/019 |
| LOUISIANA | East Baton Rouge Parish | Baton Rouge, LA | Nonattainment | Whole | 440,171 | 22/033 |
| LOUISIANA | Grant Parish | Grant Parish, LA | Maintenance | Whole | 22,309 | 22/043 |
| LOUISIANA | Iberville Parish | Baton Rouge, LA | Nonattainment | Whole | 33,387 | 22/047 |
| LOUISIANA | Jefferson Parish | New Orleans, LA | Maintenance | Whole | 432,552 | 22/051 |
| LOUISIANA | Lafayette Parish | Lafayette, LA | Maintenance | Whole | 221,578 | 22/055 |
| LOUISIANA | Lafourche Parish | Lafourche Parish, LA | Maintenance | Whole | 96,318 | 22/057 |
| LOUISIANA | Livingston Parish | Baton Rouge, LA | Nonattainment | Whole | 128,026 | 22/063 |
| LOUISIANA | Orleans Parish | New Orleans, LA | Maintenance | Whole | 343,829 | 22/071 |
| LOUISIANA | Pointe Coupee Parish | Pointe Coupee Parish, LA | Maintenance | Whole | 22,802 | 22/077 |
| LOUISIANA | St. Bernard Parish | New Orleans, LA | Maintenance | Whole | 35,897 | 22/087 |
| LOUISIANA | St. Charles Parish | New Orleans, LA | Maintenance | Whole | 52,780 | 22/089 |
| LOUISIANA | St. James Parish | St. James Parish, LA | Maintenance | Whole | 22,102 | 22/093 |
| LOUISIANA | St. Mary Parish | St. Mary Parish, LA | Maintenance | Whole | 54,650 | 22/101 |
| LOUISIANA | West Baton Rouge Parish | Baton Rouge, LA | Nonattainment | Whole | 23,788 | 22/121 |
| MAINE | Androscoggin County | Lewiston-Auburn, ME | Nonattainment | Whole | 107,702 | 23/001 |
| MAINE | Cumberland County | Portland, ME | Nonattainment | Whole | 281,674 | 23/005 |
| MAINE | Hancock County | Hancock County and Waldo County, ME | Maintenance | Whole | 54,418 | 23/009 |
| MAINE | Kennebec County | Lewiston-Auburn, ME | Nonattainment | Whole | 122,151 | 23/011 |
| MAINE | Knox County | Knox County and Lincoln County, ME | Nonattainment | Whole | 39,736 | 23/013 |
| MAINE | Lincoln County | Knox County and Lincoln County, ME | Nonattainment | Whole | 34,457 | 23/015 |
| MAINE | Sagadahoc County | Portland, ME | Nonattainment | Whole | 35,293 | 23/023 |
| MAINE | Waldo County | Hancock County and Waldo County, ME | Maintenance | Whole | 38,786 | 23/027 |
| MAINE | York County | Portland, ME | Nonattainment | Whole | 197,131 | 23/031 |
| MARYLAND | Anne Arundel County | Baltimore, MD | Nonattainment | Whole | 537,656 | 24/003 |
| MARYLAND | Baltimore County | Baltimore, MD | Nonattainment | Whole | 805,029 | 24/005 |
| MARYLAND | Baltimore city | Baltimore, MD | Nonattainment | Whole | 620,961 | 24/510 |
| MARYLAND | Calvert County | Washington, DC-MD-VA | Nonattainment | Whole | 88,737 | 24/009 |
| MARYLAND | Carroll County | Baltimore, MD | Nonattainment | Whole | 167,134 | 24/013 |
| MARYLAND | Cecil County | Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD | Nonattainment | Whole | 101,108 | 24/015 |
| MARYLAND | Charles County | Washington, DC-MD-VA | Nonattainment | Whole | 146,551 | 24/017 |
| MARYLAND | Frederick County | Washington, DC-MD-VA | Nonattainment | Whole | 233,385 | 24/021 |
| MARYLAND | Harford County | Baltimore, MD | Nonattainment | Whole | 244,826 | 24/025 |
| MARYLAND | Howard County | Baltimore, MD | Nonattainment | Whole | 287,085 | 24/027 |
| MARYLAND | Kent County | Kent County and Queen Anne's County, MD | Maintenance | Whole | 20,197 | 24/029 |
| MARYLAND | Montgomery County | Washington, DC-MD-VA | Nonattainment | Whole | 971,777 | 24/031 |
| MARYLAND | Prince George's County | Washington, DC-MD-VA | Nonattainment | Whole | 863,420 | 24/033 |
| MARYLAND | Queen Anne's County | Kent County and Queen Anne's County, MD | Maintenance | Whole | 47,798 | 24/035 |
| MASSACHUSETTS | Barnstable County | Boston-Lawrence-Worcester (E. Mass), MA-NH | Nonattainment | Whole | 215,888 | 25/001 |
| MASSACHUSETTS | Berkshire County | Springfield (Western MA), MA | Nonattainment | Whole | 131,219 | 25/003 |
| MASSACHUSETTS | Bristol County | Boston-Lawrence-Worcester (E. Mass), MA-NH | Nonattainment | Whole | 548,285 | 25/005 |
| MASSACHUSETTS | Dukes County | Boston-Lawrence-Worcester (E. Mass), MA-NH | Nonattainment | Whole | 16,535 | 25/007 |
| MASSACHUSETTS | Essex County | Boston-Lawrence-Worcester (E. Mass), MA-NH | Nonattainment | Whole | 743,159 | 25/009 |
| MASSACHUSETTS | Franklin County | Springfield (Western MA), MA | Nonattainment | Whole | 71,372 | 25/011 |
| MASSACHUSETTS | Hampden County | Springfield (Western MA), MA | Nonattainment | Whole | 463,490 | 25/013 |
| MASSACHUSETTS | Hampshire County | Springfield (Western MA), MA | Nonattainment | Whole | 158,080 | 25/015 |
| MASSACHUSETTS | Middlesex County | Boston-Lawrence-Worcester (E. Mass), MA-NH | Nonattainment | Whole | 1,503,085 | 25/017 |
| MASSACHUSETTS | Nantucket County | Boston-Lawrence-Worcester (E. Mass), MA-NH | Nonattainment | Whole | 10,172 | 25/019 |
| MASSACHUSETTS | Norfolk County | Boston-Lawrence-Worcester (E. Mass), MA-NH | Nonattainment | Whole | 670,850 | 25/021 |
| MASSACHUSETTS | Plymouth County | Boston-Lawrence-Worcester (E. Mass), MA-NH | Nonattainment | Whole | 494,919 | 25/023 |
| MASSACHUSETTS | Suffolk County | Boston-Lawrence-Worcester (E. Mass), MA-NH | Nonattainment | Whole | 722,023 | 25/025 |
| MASSACHUSETTS | Worcester County | Boston-Lawrence-Worcester (E. Mass), MA-NH | Nonattainment | Whole | 798,552 | 25/027 |
| MICHIGAN | Allegan County | Allegan County, MI | Maintenance | Whole | 111,408 | 26/005 |
| MICHIGAN | Bay County | Saginaw-Bay City-Midland, MI | Maintenance | Whole | 107,771 | 26/017 |
| MICHIGAN | Genesee County | Flint, MI | Maintenance | Whole | 425,790 | 26/049 |
| MICHIGAN | Kent County | Grand Rapids, MI | Maintenance | Whole | 602,622 | 26/081 |
| MICHIGAN | Livingston County | Detroit-Ann Arbor, MI | Maintenance | Whole | 180,967 | 26/093 |
| MICHIGAN | Macomb County | Detroit-Ann Arbor, MI | Maintenance | Whole | 840,978 | 26/099 |
| MICHIGAN | Midland County | Saginaw-Bay City-Midland, MI | Maintenance | Whole | 83,629 | 26/111 |
| MICHIGAN | Monroe County | Detroit-Ann Arbor, MI | Maintenance | Whole | 152,021 | 26/115 |
| MICHIGAN | Muskegon County | Muskegon, MI | Maintenance | Whole | 172,188 | 26/121 |
| MICHIGAN | Oakland County | Detroit-Ann Arbor, MI | Maintenance | Whole | 1,202,362 | 26/125 |
| MICHIGAN | Ottawa County | Grand Rapids, MI | Maintenance | Whole | 263,801 | 26/139 |
| MICHIGAN | Saginaw County | Saginaw-Bay City-Midland, MI | Maintenance | Whole | 200,169 | 26/145 |
| MICHIGAN | St. Clair County | Detroit-Ann Arbor, MI | Maintenance | Whole | 163,040 | 26/147 |
| MICHIGAN | Washtenaw County | Detroit-Ann Arbor, MI | Maintenance | Whole | 344,791 | 26/161 |
| MICHIGAN | Wayne County | Detroit-Ann Arbor, MI | Maintenance | Whole | 1,820,584 | 26/163 |
| MISSOURI | Clay County | Kansas City, MO-KS | Maintenance | Whole | 221,939 | 29/047 |
| MISSOURI | Franklin County | St. Louis, MO-IL | Maintenance | Whole | 101,492 | 29/071 |
| MISSOURI | Jackson County | Kansas City, MO-KS | Maintenance | Whole | 674,158 | 29/095 |
| MISSOURI | Jefferson County | St. Louis, MO-IL | Maintenance | Whole | 218,733 | 29/099 |
| MISSOURI | Platte County | Kansas City, MO-KS | Maintenance | Whole | 89,322 | 29/165 |
| MISSOURI | St. Charles County | St. Louis, MO-IL | Maintenance | Whole | 360,485 | 29/183 |
| MISSOURI | St. Louis County | St. Louis, MO-IL | Maintenance | Whole | 998,954 | 29/189 |
| MISSOURI | St. Louis city | St. Louis, MO-IL | Maintenance | Whole | 319,294 | 29/510 |
| NEVADA | Washoe County | Reno, NV | Nonattainment | Whole | 421,407 | 32/031 |
| NEW HAMPSHIRE | Cheshire County | Cheshire County, NH | Nonattainment | Whole | 77,117 | 33/005 |
| NEW HAMPSHIRE | Hillsborough County | Boston-Lawrence-Worcester (E. Mass), MA-NH | Nonattainment | Part | 202,700 | 33/011 |
| NEW HAMPSHIRE | Hillsborough County | Manchester, NH | Nonattainment | Part | 198,021 | 33/011 |
| NEW HAMPSHIRE | Merrimack County | Manchester, NH | Nonattainment | Whole | 146,445 | 33/013 |
| NEW HAMPSHIRE | Rockingham County | Boston-Lawrence-Worcester (E. Mass), MA-NH | Nonattainment | Part | 164,200 | 33/015 |
| NEW HAMPSHIRE | Rockingham County | Manchester, NH | Nonattainment | Part | 47,768 | 33/015 |
| NEW HAMPSHIRE | Rockingham County | Portsmouth-Dover-Rochester, NH | Nonattainment | Part | 83,255 | 33/015 |
| NEW HAMPSHIRE | Strafford County | Portsmouth-Dover-Rochester, NH | Nonattainment | Whole | 123,143 | 33/017 |
| NEW JERSEY | Atlantic County | Atlantic City, NJ | Nonattainment | Whole | 274,549 | 34/001 |
| NEW JERSEY | Bergen County | New York-N. New Jersey-Long Island, NY-NJ-CT | Nonattainment | Whole | 905,116 | 34/003 |
| NEW JERSEY | Burlington County | Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD | Nonattainment | Whole | 448,734 | 34/005 |
| NEW JERSEY | Camden County | Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD | Nonattainment | Whole | 513,657 | 34/007 |
| NEW JERSEY | Cape May County | Atlantic City, NJ | Nonattainment | Whole | 97,265 | 34/009 |
| NEW JERSEY | Cumberland County | Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD | Nonattainment | Whole | 156,898 | 34/011 |
| NEW JERSEY | Essex County | New York-N. New Jersey-Long Island, NY-NJ-CT | Nonattainment | Whole | 783,969 | 34/013 |
| NEW JERSEY | Gloucester County | Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD | Nonattainment | Whole | 288,288 | 34/015 |
| NEW JERSEY | Hudson County | New York-N. New Jersey-Long Island, NY-NJ-CT | Nonattainment | Whole | 634,266 | 34/017 |
| NEW JERSEY | Hunterdon County | New York-N. New Jersey-Long Island, NY-NJ-CT | Nonattainment | Whole | 128,349 | 34/019 |
| NEW JERSEY | Mercer County | Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD | Nonattainment | Whole | 366,513 | 34/021 |
| NEW JERSEY | Middlesex County | New York-N. New Jersey-Long Island, NY-NJ-CT | Nonattainment | Whole | 809,858 | 34/023 |
| NEW JERSEY | Monmouth County | New York-N. New Jersey-Long Island, NY-NJ-CT | Nonattainment | Whole | 630,380 | 34/025 |
| NEW JERSEY | Morris County | New York-N. New Jersey-Long Island, NY-NJ-CT | Nonattainment | Whole | 492,276 | 34/027 |
| NEW JERSEY | Ocean County | New York-N. New Jersey-Long Island, NY-NJ-CT | Nonattainment | Whole | 576,567 | 34/029 |
| NEW JERSEY | Passaic County | New York-N. New Jersey-Long Island, NY-NJ-CT | Nonattainment | Whole | 501,226 | 34/031 |
| NEW JERSEY | Salem County | Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD | Nonattainment | Whole | 66,083 | 34/033 |
| NEW JERSEY | Somerset County | New York-N. New Jersey-Long Island, NY-NJ-CT | Nonattainment | Whole | 323,444 | 34/035 |
| NEW JERSEY | Sussex County | New York-N. New Jersey-Long Island, NY-NJ-CT | Nonattainment | Whole | 149,265 | 34/037 |
| NEW JERSEY | Union County | New York-N. New Jersey-Long Island, NY-NJ-CT | Nonattainment | Whole | 536,499 | 34/039 |
| NEW JERSEY | Warren County | Allentown-Bethlehem-Easton, PA-NJ | Nonattainment | Whole | 108,692 | 34/041 |
| NEW MEXICO | Dona Ana County | Dona Ana County (part); Sunland Park, NM | Nonattainment | Part | 12,345 | 35/013 |
| NEW YORK | Albany County | Albany-Schenectady-Troy, NY | Nonattainment | Whole | 304,204 | 36/001 |
| NEW YORK | Bronx County | New York-N. New Jersey-Long Island, NY-NJ-CT | Nonattainment | Whole | 1,385,108 | 36/005 |
| NEW YORK | Dutchess County | Poughkeepsie, NY | Nonattainment | Whole | 297,488 | 36/027 |
| NEW YORK | Erie County | Buffalo-Niagara Falls, NY | Nonattainment | Whole | 919,040 | 36/029 |
| NEW YORK | Essex County | Essex County; Whiteface Mountain, NY | Nonattainment | Part | 0 | 36/031 |
| NEW YORK | Greene County | Albany-Schenectady-Troy, NY | Nonattainment | Whole | 49,221 | 36/039 |
| NEW YORK | Jefferson County | Jefferson County, NY | Nonattainment | Whole | 116,229 | 36/045 |
| NEW YORK | Kings County | New York-N. New Jersey-Long Island, NY-NJ-CT | Nonattainment | Whole | 2,504,700 | 36/047 |
| NEW YORK | Montgomery County | Albany-Schenectady-Troy, NY | Nonattainment | Whole | 50,219 | 36/057 |
| NEW YORK | Nassau County | New York-N. New Jersey-Long Island, NY-NJ-CT | Nonattainment | Whole | 1,339,532 | 36/059 |
| NEW YORK | New York County | New York-N. New Jersey-Long Island, NY-NJ-CT | Nonattainment | Whole | 1,585,873 | 36/061 |
| NEW YORK | Niagara County | Buffalo-Niagara Falls, NY | Nonattainment | Whole | 216,469 | 36/063 |
| NEW YORK | Orange County | New York-N. New Jersey-Long Island, NY-NJ-CT | Nonattainment | Part | 129,455 | 36/071 |
| NEW YORK | Orange County | Poughkeepsie, NY | Nonattainment | Part | 243,358 | 36/071 |
| NEW YORK | Putnam County | Poughkeepsie, NY | Nonattainment | Whole | 99,710 | 36/079 |
| NEW YORK | Queens County | New York-N. New Jersey-Long Island, NY-NJ-CT | Nonattainment | Whole | 2,230,722 | 36/081 |
| NEW YORK | Rensselaer County | Albany-Schenectady-Troy, NY | Nonattainment | Whole | 159,429 | 36/083 |
| NEW YORK | Richmond County | New York-N. New Jersey-Long Island, NY-NJ-CT | Nonattainment | Whole | 468,730 | 36/085 |
| NEW YORK | Rockland County | New York-N. New Jersey-Long Island, NY-NJ-CT | Nonattainment | Whole | 311,687 | 36/087 |
| NEW YORK | Saratoga County | Albany-Schenectady-Troy, NY | Nonattainment | Whole | 219,607 | 36/091 |
| NEW YORK | Schenectady County | Albany-Schenectady-Troy, NY | Nonattainment | Whole | 154,727 | 36/093 |
| NEW YORK | Suffolk County | New York-N. New Jersey-Long Island, NY-NJ-CT | Nonattainment | Whole | 1,493,350 | 36/103 |
| NEW YORK | Westchester County | New York-N. New Jersey-Long Island, NY-NJ-CT | Nonattainment | Whole | 949,113 | 36/119 |
| NORTH CAROLINA | Davidson County | Greensboro-Winston-Salem-High Point, NC | Maintenance | Whole | 162,878 | 37/057 |
| NORTH CAROLINA | Davie County | Greensboro-Winston-Salem-High Point, NC | Maintenance | Part | 1 | 37/059 |
| NORTH CAROLINA | Durham County | Raleigh-Durham, NC | Maintenance | Whole | 267,587 | 37/063 |
| NORTH CAROLINA | Forsyth County | Greensboro-Winston-Salem-High Point, NC | Maintenance | Whole | 350,670 | 37/067 |
| NORTH CAROLINA | Gaston County | Charlotte-Gastonia, NC | Maintenance | Whole | 206,086 | 37/071 |
| NORTH CAROLINA | Granville County | Raleigh-Durham, NC | Maintenance | Part | 17,725 | 37/077 |
| NORTH CAROLINA | Guilford County | Greensboro-Winston-Salem-High Point, NC | Maintenance | Whole | 488,406 | 37/081 |
| NORTH CAROLINA | Mecklenburg County | Charlotte-Gastonia, NC | Maintenance | Whole | 919,628 | 37/119 |
| NORTH CAROLINA | Wake County | Raleigh-Durham, NC | Maintenance | Whole | 900,993 | 37/183 |
| OHIO | Ashtabula County | Cleveland-Akron-Lorain, OH | Maintenance | Whole | 101,497 | 39/007 |
| OHIO | Butler County | Cincinnati-Hamilton, OH-KY | Maintenance | Whole | 368,130 | 39/017 |
| OHIO | Clark County | Dayton-Springfield, OH | Maintenance | Whole | 138,333 | 39/023 |
| OHIO | Clermont County | Cincinnati-Hamilton, OH-KY | Maintenance | Whole | 197,363 | 39/025 |
| OHIO | Clinton County | Clinton County, OH | Maintenance | Whole | 42,040 | 39/027 |
| OHIO | Columbiana County | Columbiana County, OH | Maintenance | Whole | 107,841 | 39/029 |
| OHIO | Cuyahoga County | Cleveland-Akron-Lorain, OH | Maintenance | Whole | 1,280,122 | 39/035 |
| OHIO | Delaware County | Columbus, OH | Maintenance | Whole | 174,214 | 39/041 |
| OHIO | Franklin County | Columbus, OH | Maintenance | Whole | 1,163,414 | 39/049 |
| OHIO | Geauga County | Cleveland-Akron-Lorain, OH | Maintenance | Whole | 93,389 | 39/055 |
| OHIO | Greene County | Dayton-Springfield, OH | Maintenance | Whole | 161,573 | 39/057 |
| OHIO | Hamilton County | Cincinnati-Hamilton, OH-KY | Maintenance | Whole | 802,374 | 39/061 |
| OHIO | Jefferson County | Steubenville, OH | Maintenance | Whole | 69,709 | 39/081 |
| OHIO | Lake County | Cleveland-Akron-Lorain, OH | Maintenance | Whole | 230,041 | 39/085 |
| OHIO | Licking County | Columbus, OH | Maintenance | Whole | 166,492 | 39/089 |
| OHIO | Lorain County | Cleveland-Akron-Lorain, OH | Maintenance | Whole | 301,356 | 39/093 |
| OHIO | Lucas County | Toledo, OH | Maintenance | Whole | 441,815 | 39/095 |
| OHIO | Mahoning County | Youngstown-Warren-Sharon, OH-PA (OH portion) | Maintenance | Whole | 238,823 | 39/099 |
| OHIO | Medina County | Cleveland-Akron-Lorain, OH | Maintenance | Whole | 172,332 | 39/103 |
| OHIO | Miami County | Dayton-Springfield, OH | Maintenance | Whole | 102,506 | 39/109 |
| OHIO | Montgomery County | Dayton-Springfield, OH | Maintenance | Whole | 535,153 | 39/113 |
| OHIO | Portage County | Cleveland-Akron-Lorain, OH | Maintenance | Whole | 161,419 | 39/133 |
| OHIO | Preble County | Preble County, OH | Maintenance | Whole | 42,270 | 39/135 |
| OHIO | Stark County | Canton, OH | Maintenance | Whole | 375,586 | 39/151 |
| OHIO | Summit County | Cleveland-Akron-Lorain, OH | Maintenance | Whole | 541,781 | 39/153 |
| OHIO | Trumbull County | Youngstown-Warren-Sharon, OH-PA (OH portion) | Maintenance | Whole | 210,312 | 39/155 |
| OHIO | Warren County | Cincinnati-Hamilton, OH-KY | Maintenance | Whole | 212,693 | 39/165 |
| OHIO | Wood County | Toledo, OH | Maintenance | Whole | 125,488 | 39/173 |
| OREGON | Clackamas County | Portland-Vancouver AQMA, OR-WA | Maintenance | Part | 373,166 | 41/005 |
| OREGON | Marion County | Salem, OR | Nonattainment | Part | 313,385 | 41/047 |
| OREGON | Multnomah County | Portland-Vancouver AQMA, OR-WA | Maintenance | Part | 377,954 | 41/051 |
| OREGON | Polk County | Salem, OR | Nonattainment | Part | 75,179 | 41/053 |
| OREGON | Washington County | Portland-Vancouver AQMA, OR-WA | Maintenance | Part | 510,250 | 41/067 |
| PENNSYLVANIA | Adams County | York, PA | Nonattainment | Whole | 101,407 | 42/001 |
| PENNSYLVANIA | Allegheny County | Pittsburgh-Beaver Valley, PA | Maintenance | Whole | 1,223,348 | 42/003 |
| PENNSYLVANIA | Armstrong County | Pittsburgh-Beaver Valley, PA | Maintenance | Whole | 68,941 | 42/005 |
| PENNSYLVANIA | Beaver County | Pittsburgh-Beaver Valley, PA | Maintenance | Whole | 170,539 | 42/007 |
| PENNSYLVANIA | Berks County | Reading, PA | Maintenance | Whole | 411,442 | 42/011 |
| PENNSYLVANIA | Blair County | Altoona, PA | Nonattainment | Whole | 127,089 | 42/013 |
| PENNSYLVANIA | Bucks County | Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD | Nonattainment | Whole | 625,249 | 42/017 |
| PENNSYLVANIA | Butler County | Pittsburgh-Beaver Valley, PA | Maintenance | Whole | 183,862 | 42/019 |
| PENNSYLVANIA | Cambria County | Johnstown, PA | Nonattainment | Whole | 143,679 | 42/021 |
| PENNSYLVANIA | Carbon County | Allentown-Bethlehem-Easton, PA-NJ | Nonattainment | Whole | 65,249 | 42/025 |
| PENNSYLVANIA | Chester County | Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD | Nonattainment | Whole | 498,886 | 42/029 |
| PENNSYLVANIA | Columbia County | Scranton-Wilkes-Barre, PA | Nonattainment | Whole | 67,295 | 42/037 |
| PENNSYLVANIA | Crawford County | Crawford County, PA | Nonattainment | Whole | 88,765 | 42/039 |
| PENNSYLVANIA | Cumberland County | Harrisburg-Lebanon-Carlisle, PA | Nonattainment | Whole | 235,406 | 42/041 |
| PENNSYLVANIA | Dauphin County | Harrisburg-Lebanon-Carlisle, PA | Nonattainment | Whole | 268,100 | 42/043 |
| PENNSYLVANIA | Delaware County | Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD | Nonattainment | Whole | 558,979 | 42/045 |
| PENNSYLVANIA | Erie County | Erie, PA | Nonattainment | Whole | 280,566 | 42/049 |
| PENNSYLVANIA | Fayette County | Pittsburgh-Beaver Valley, PA | Maintenance | Whole | 136,606 | 42/051 |
| PENNSYLVANIA | Franklin County | Franklin County, PA | Nonattainment | Whole | 149,618 | 42/055 |
| PENNSYLVANIA | Greene County | Greene County, PA | Nonattainment | Whole | 38,686 | 42/059 |
| PENNSYLVANIA | Juniata County | Juniata County, PA | Nonattainment | Whole | 24,636 | 42/067 |
| PENNSYLVANIA | Lackawanna County | Scranton-Wilkes-Barre, PA | Nonattainment | Whole | 214,437 | 42/069 |
| PENNSYLVANIA | Lancaster County | Lancaster, PA | Nonattainment | Whole | 519,445 | 42/071 |
| PENNSYLVANIA | Lawrence County | Lawrence County, PA | Nonattainment | Whole | 91,108 | 42/073 |
| PENNSYLVANIA | Lebanon County | Harrisburg-Lebanon-Carlisle, PA | Nonattainment | Whole | 133,568 | 42/075 |
| PENNSYLVANIA | Lehigh County | Allentown-Bethlehem-Easton, PA-NJ | Nonattainment | Whole | 349,497 | 42/077 |
| PENNSYLVANIA | Luzerne County | Scranton-Wilkes-Barre, PA | Nonattainment | Whole | 320,918 | 42/079 |
| PENNSYLVANIA | Mercer County | Youngstown-Warren-Sharon, OH-PA (PA portion) | Nonattainment | Whole | 116,638 | 42/085 |
| PENNSYLVANIA | Monroe County | Scranton-Wilkes-Barre, PA | Nonattainment | Whole | 169,842 | 42/089 |
| PENNSYLVANIA | Montgomery County | Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD | Nonattainment | Whole | 799,874 | 42/091 |
| PENNSYLVANIA | Northampton County | Allentown-Bethlehem-Easton, PA-NJ | Nonattainment | Whole | 297,735 | 42/095 |
| PENNSYLVANIA | Northumberland County | Northumberland County, PA | Nonattainment | Whole | 94,528 | 42/097 |
| PENNSYLVANIA | Perry County | Harrisburg-Lebanon-Carlisle, PA | Nonattainment | Whole | 45,969 | 42/099 |
| PENNSYLVANIA | Philadelphia County | Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD | Nonattainment | Whole | 1,526,006 | 42/101 |
| PENNSYLVANIA | Pike County | Pike County, PA | Nonattainment | Whole | 57,369 | 42/103 |
| PENNSYLVANIA | Schuylkill County | Schuylkill County, PA | Nonattainment | Whole | 148,289 | 42/107 |
| PENNSYLVANIA | Snyder County | Snyder County, PA | Nonattainment | Whole | 39,702 | 42/109 |
| PENNSYLVANIA | Somerset County | Johnstown, PA | Nonattainment | Whole | 77,742 | 42/111 |
| PENNSYLVANIA | Susquehanna County | Susquehanna County, PA | Nonattainment | Whole | 43,356 | 42/115 |
| PENNSYLVANIA | Warren County | Warren County, PA | Nonattainment | Whole | 41,815 | 42/123 |
| PENNSYLVANIA | Washington County | Pittsburgh-Beaver Valley, PA | Maintenance | Whole | 207,820 | 42/125 |
| PENNSYLVANIA | Wayne County | Wayne County, PA | Nonattainment | Whole | 52,822 | 42/127 |
| PENNSYLVANIA | Westmoreland County | Pittsburgh-Beaver Valley, PA | Maintenance | Whole | 365,169 | 42/129 |
| PENNSYLVANIA | Wyoming County | Scranton-Wilkes-Barre, PA | Nonattainment | Whole | 28,276 | 42/131 |
| PENNSYLVANIA | York County | York, PA | Nonattainment | Whole | 434,972 | 42/133 |
| RHODE ISLAND | Bristol County | Providence (all of RI), RI | Nonattainment | Whole | 49,875 | 44/001 |
| RHODE ISLAND | Kent County | Providence (all of RI), RI | Nonattainment | Whole | 166,158 | 44/003 |
| RHODE ISLAND | Newport County | Providence (all of RI), RI | Nonattainment | Whole | 82,888 | 44/005 |
| RHODE ISLAND | Providence County | Providence (all of RI), RI | Nonattainment | Whole | 626,667 | 44/007 |
| RHODE ISLAND | Washington County | Providence (all of RI), RI | Nonattainment | Whole | 126,979 | 44/009 |
| SOUTH CAROLINA | Cherokee County | Cherokee County, SC | Maintenance | Whole | 55,342 | 45/021 |
| TENNESSEE | Davidson County | Nashville, TN | Maintenance | Whole | 626,681 | 47/037 |
| TENNESSEE | Knox County | Knoxville, TN | Maintenance | Whole | 432,226 | 47/093 |
| TENNESSEE | Rutherford County | Nashville, TN | Maintenance | Whole | 262,604 | 47/149 |
| TENNESSEE | Shelby County | Memphis, TN | Maintenance | Whole | 927,644 | 47/157 |
| TENNESSEE | Sumner County | Nashville, TN | Maintenance | Whole | 160,645 | 47/165 |
| TENNESSEE | Williamson County | Nashville, TN | Maintenance | Whole | 183,182 | 47/187 |
| TENNESSEE | Wilson County | Nashville, TN | Maintenance | Whole | 113,993 | 47/189 |
| TEXAS | Brazoria County | Houston-Galveston-Brazoria, TX | Nonattainment | Whole | 313,166 | 48/039 |
| TEXAS | Chambers County | Houston-Galveston-Brazoria, TX | Nonattainment | Whole | 35,096 | 48/071 |
| TEXAS | Collin County | Dallas-Fort Worth, TX | Nonattainment | Whole | 782,341 | 48/085 |
| TEXAS | Dallas County | Dallas-Fort Worth, TX | Nonattainment | Whole | 2,368,139 | 48/113 |
| TEXAS | Denton County | Dallas-Fort Worth, TX | Nonattainment | Whole | 662,614 | 48/121 |
| TEXAS | El Paso County | El Paso, TX | Nonattainment | Whole | 800,647 | 48/141 |
| TEXAS | Fort Bend County | Houston-Galveston-Brazoria, TX | Nonattainment | Whole | 585,375 | 48/157 |
| TEXAS | Galveston County | Houston-Galveston-Brazoria, TX | Nonattainment | Whole | 291,309 | 48/167 |
| TEXAS | Hardin County | Beaumont-Port Arthur, TX | Nonattainment | Whole | 54,635 | 48/199 |
| TEXAS | Harris County | Houston-Galveston-Brazoria, TX | Nonattainment | Whole | 4,092,459 | 48/201 |
| TEXAS | Jefferson County | Beaumont-Port Arthur, TX | Nonattainment | Whole | 252,273 | 48/245 |
| TEXAS | Liberty County | Houston-Galveston-Brazoria, TX | Nonattainment | Whole | 75,643 | 48/291 |
| TEXAS | Montgomery County | Houston-Galveston-Brazoria, TX | Nonattainment | Whole | 455,746 | 48/339 |
| TEXAS | Orange County | Beaumont-Port Arthur, TX | Nonattainment | Whole | 81,837 | 48/361 |
| TEXAS | Tarrant County | Dallas-Fort Worth, TX | Nonattainment | Whole | 1,809,034 | 48/439 |
| TEXAS | Victoria County | Victoria, TX | Maintenance | Whole | 86,793 | 48/469 |
| TEXAS | Waller County | Houston-Galveston-Brazoria, TX | Nonattainment | Whole | 43,205 | 48/473 |
| UTAH | Davis County | Salt Lake City, UT | Maintenance | Whole | 306,479 | 49/011 |
| UTAH | Salt Lake County | Salt Lake City, UT | Maintenance | Whole | 1,029,655 | 49/035 |
| VIRGINIA | Alexandria city | Washington, DC-MD-VA | Nonattainment | Whole | 139,966 | 51/510 |
| VIRGINIA | Arlington County | Washington, DC-MD-VA | Nonattainment | Whole | 207,627 | 51/013 |
| VIRGINIA | Charles City County | Richmond, VA | Maintenance | Part | 62 | 51/036 |
| VIRGINIA | Chesapeake city | Norfolk-Virginia Beach-Newport News (Hampton Roads), VA | Maintenance | Whole | 222,209 | 51/550 |
| VIRGINIA | Chesterfield County | Richmond, VA | Maintenance | Whole | 316,236 | 51/041 |
| VIRGINIA | Colonial Heights city | Richmond, VA | Maintenance | Whole | 17,411 | 51/570 |
| VIRGINIA | Fairfax County | Washington, DC-MD-VA | Nonattainment | Whole | 1,081,726 | 51/059 |
| VIRGINIA | Fairfax city | Washington, DC-MD-VA | Nonattainment | Whole | 22,565 | 51/600 |
| VIRGINIA | Falls Church city | Washington, DC-MD-VA | Nonattainment | Whole | 12,332 | 51/610 |
| VIRGINIA | Hampton city | Norfolk-Virginia Beach-Newport News (Hampton Roads), VA | Maintenance | Whole | 137,436 | 51/650 |
| VIRGINIA | Hanover County | Richmond, VA | Maintenance | Whole | 99,863 | 51/085 |
| VIRGINIA | Henrico County | Richmond, VA | Maintenance | Whole | 306,935 | 51/087 |
| VIRGINIA | Hopewell city | Richmond, VA | Maintenance | Whole | 22,591 | 51/670 |
| VIRGINIA | James City County | Norfolk-Virginia Beach-Newport News (Hampton Roads), VA | Maintenance | Whole | 67,009 | 51/095 |
| VIRGINIA | Loudoun County | Washington, DC-MD-VA | Nonattainment | Whole | 312,311 | 51/107 |
| VIRGINIA | Manassas Park city | Washington, DC-MD-VA | Nonattainment | Whole | 14,273 | 51/685 |
| VIRGINIA | Manassas city | Washington, DC-MD-VA | Nonattainment | Whole | 37,821 | 51/683 |
| VIRGINIA | Newport News city | Norfolk-Virginia Beach-Newport News (Hampton Roads), VA | Maintenance | Whole | 180,719 | 51/700 |
| VIRGINIA | Norfolk city | Norfolk-Virginia Beach-Newport News (Hampton Roads), VA | Maintenance | Whole | 242,803 | 51/710 |
| VIRGINIA | Poquoson city | Norfolk-Virginia Beach-Newport News (Hampton Roads), VA | Maintenance | Whole | 12,150 | 51/735 |
| VIRGINIA | Portsmouth city | Norfolk-Virginia Beach-Newport News (Hampton Roads), VA | Maintenance | Whole | 95,535 | 51/740 |
| VIRGINIA | Prince William County | Washington, DC-MD-VA | Nonattainment | Whole | 402,002 | 51/153 |
| VIRGINIA | Richmond city | Richmond, VA | Maintenance | Whole | 204,214 | 51/760 |
| VIRGINIA | Smyth County | Smyth County; White Top Mountain, VA | Nonattainment | Part | 0 | 51/173 |
| VIRGINIA | Stafford County | Washington, DC-MD-VA | Nonattainment | Whole | 128,961 | 51/179 |
| VIRGINIA | Suffolk city | Norfolk-Virginia Beach-Newport News (Hampton Roads), VA | Maintenance | Whole | 84,585 | 51/800 |
| VIRGINIA | Virginia Beach city | Norfolk-Virginia Beach-Newport News (Hampton Roads), VA | Maintenance | Whole | 437,994 | 51/810 |
| VIRGINIA | Williamsburg city | Norfolk-Virginia Beach-Newport News (Hampton Roads), VA | Maintenance | Whole | 14,068 | 51/830 |
| VIRGINIA | York County | Norfolk-Virginia Beach-Newport News (Hampton Roads), VA | Maintenance | Whole | 65,464 | 51/199 |
| WASHINGTON | Clark County | Portland-Vancouver AQMA, OR-WA | Maintenance | Part | 410,990 | 53/011 |
| WASHINGTON | King County | Seattle-Tacoma, WA | Maintenance | Part | 1,931,234 | 53/033 |
| WASHINGTON | Pierce County | Seattle-Tacoma, WA | Maintenance | Whole | 795,225 | 53/053 |
| WASHINGTON | Snohomish County | Seattle-Tacoma, WA | Maintenance | Part | 713,351 | 53/061 |
| WEST VIRGINIA | Cabell County | Huntington-Ashland, WV-KY | Maintenance | Whole | 96,319 | 54/011 |
| WEST VIRGINIA | Greenbrier County | Greenbrier, WV | Maintenance | Whole | 35,480 | 54/025 |
| WEST VIRGINIA | Kanawha County | Charleston, WV | Maintenance | Whole | 193,063 | 54/039 |
| WEST VIRGINIA | Putnam County | Charleston, WV | Maintenance | Whole | 55,486 | 54/079 |
| WEST VIRGINIA | Wayne County | Huntington-Ashland, WV-KY | Maintenance | Whole | 42,481 | 54/099 |
| WEST VIRGINIA | Wood County | Parkersburg-Marietta, WV | Maintenance | Whole | 86,956 | 54/107 |
| WISCONSIN | Door County | Door County, WI | Maintenance | Whole | 27,785 | 55/029 |
| WISCONSIN | Kenosha County | Milwaukee-Racine, WI | Nonattainment | Whole | 166,426 | 55/059 |
| WISCONSIN | Kewaunee County | Kewaunee County, WI | Maintenance | Whole | 20,574 | 55/061 |
| WISCONSIN | Manitowoc County | Manitowoc County, WI | Maintenance | Whole | 81,442 | 55/071 |
| WISCONSIN | Milwaukee County | Milwaukee-Racine, WI | Nonattainment | Whole | 947,735 | 55/079 |
| WISCONSIN | Ozaukee County | Milwaukee-Racine, WI | Nonattainment | Whole | 86,395 | 55/089 |
| WISCONSIN | Racine County | Milwaukee-Racine, WI | Nonattainment | Whole | 195,408 | 55/101 |
| WISCONSIN | Sheboygan County | Sheboygan, WI | Maintenance | Whole | 115,507 | 55/117 |
| WISCONSIN | Walworth County | Walworth County, WI | Maintenance | Whole | 102,228 | 55/127 |
| WISCONSIN | Washington County | Milwaukee-Racine, WI | Nonattainment | Whole | 131,887 | 55/131 |
| WISCONSIN | Waukesha County | Milwaukee-Racine, WI | Nonattainment | Whole | 389,891 | 55/133 |
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