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8-Hour Ozone (1997) Nonattainment Area/State/County Report
As of December 14, 2012View Notes
Area Name (Category/Classification) (P) Partial County
| Albany-Schenectady-Troy, NY | |
| NEW YORK (Region II) | |
| Albany Co | |
| Greene Co | |
| Montgomery Co | |
| Rensselaer Co | |
| Saratoga Co | |
| Schenectady Co | |
| Schoharie Co | |
| Amador and Calaveras Cos (Central Mtn), CA | |
| CALIFORNIA (Region IX) | |
| Amador Co | |
| Calaveras Co | |
| Atlanta, GA | |
| GEORGIA (Region IV) | |
| Barrow Co | |
| Bartow Co | |
| Carroll Co | |
| Cherokee Co | |
| Clayton Co | |
| Cobb Co | |
| Coweta Co | |
| De Kalb Co | |
| Douglas Co | |
| Fayette Co | |
| Forsyth Co | |
| Fulton Co | |
| Gwinnett Co | |
| Hall Co | |
| Henry Co | |
| Newton Co | |
| Paulding Co | |
| Rockdale Co | |
| Spalding Co | |
| Walton Co | |
| Baltimore, MD | |
| MARYLAND (Region III) | |
| Anne Arundel Co | |
| Baltimore (City) | |
| Baltimore Co | |
| Carroll Co | |
| Harford Co | |
| Howard Co | |
| Boston-Lawrence-Worcester (E. MA), MA | |
| MASSACHUSETTS (Region I) | |
| Barnstable Co | |
| Bristol Co | |
| Dukes Co | |
| Essex Co | |
| Middlesex Co | |
| Nantucket Co | |
| Norfolk Co | |
| Plymouth Co | |
| Suffolk Co | |
| Worcester Co | |
| Boston-Manchester-Portsmouth (SE), NH | |
| NEW HAMPSHIRE (Region I) | |
| Hillsborough Co (P) | |
| Merrimack Co (P) | |
| (includes only the following town): Hooksett | |
| Rockingham Co (P) | |
| Strafford Co (P) | |
| Buffalo-Niagara Falls, NY | |
| NEW YORK (Region II) | |
| Erie Co | |
| Niagara Co | |
| Charlotte-Gastonia-Rock Hill, NC-SC | |
| NORTH CAROLINA (Region IV) | |
| Cabarrus Co | |
| Gaston Co | |
| Iredell Co (P) | |
| Davidson Township Coddle Creek Township | |
| Lincoln Co | |
| Mecklenburg Co | |
| Rowan Co | |
| Union Co | |
| SOUTH CAROLINA (Region IV) | |
| York Co (P) | |
| Portion along MPO lines | |
| Chico, CA | |
| CALIFORNIA (Region IX) | |
| Butte Co | |
| Dallas-Fort Worth, TX | |
| TEXAS (Region VI) | |
| Collin Co | |
| Dallas Co | |
| Denton Co | |
| Ellis Co | |
| Johnson Co | |
| Kaufman Co | |
| Parker Co | |
| Rockwall Co | |
| Tarrant Co | |
| Denver-Boulder-Greeley-Ft Collins-Loveland, CO | |
| COLORADO (Region VIII) | |
| Adams Co | |
| Arapahoe Co | |
| Boulder Co | |
| Broomfield Co | |
| Denver Co | |
| Douglas Co | |
| Jefferson Co | |
| Larimer Co (P) | |
| Weld Co (P) | |
| Essex Co (Whiteface Mtn), NY | |
| NEW YORK (Region II) | |
| Essex Co (P) | |
| Greater Connecticut, CT | |
| CONNECTICUT (Region I) | |
| Hartford Co | |
| Litchfield Co | |
| New London Co | |
| Tolland Co | |
| Windham Co | |
| Houston-Galveston-Brazoria, TX | |
| TEXAS (Region VI) | |
| Brazoria Co | |
| Chambers Co | |
| Fort Bend Co | |
| Galveston Co | |
| Harris Co | |
| Liberty Co | |
| Montgomery Co | |
| Waller Co | |
| Imperial Co, CA | |
| CALIFORNIA (Region IX) | |
| Imperial Co | |
| Jamestown, NY | |
| NEW YORK (Region II) | |
| Chautauqua Co | |
| Jefferson Co, NY | |
| NEW YORK (Region II) | |
| Jefferson Co | |
| Kern Co (Eastern Kern), CA | |
| CALIFORNIA (Region IX) | |
| Kern Co (P) | |
| Las Vegas, NV | |
| NEVADA (Region IX) | |
| Clark Co (P) | |
| Los Angeles South Coast Air Basin, CA | |
| CALIFORNIA (Region IX) | |
| Los Angeles Co (P) | |
| Orange Co | |
| Riverside Co (P) | |
| San Bernardino Co (P) | |
| Los Angeles-San Bernardino Cos. (W Mojave Desert), CA | |
| CALIFORNIA (Region IX) | |
| Los Angeles Co (P) | |
| San Bernardino Co (P) | |
| Mariposa and Tuolumne Cos (Southern Mtn), CA | |
| CALIFORNIA (Region IX) | |
| Mariposa Co | |
| Tuolumne Co | |
| Nevada Co. (Western Part), CA | |
| CALIFORNIA (Region IX) | |
| Nevada Co (P) | |
| New York-N. New Jersey-Long Island, NY-NJ-CT | |
| CONNECTICUT (Region I) | |
| Fairfield Co | |
| Middlesex Co | |
| New Haven Co | |
| NEW JERSEY (Region II) | |
| Bergen Co | |
| Essex Co | |
| Hudson Co | |
| Hunterdon Co | |
| Middlesex Co | |
| Monmouth Co | |
| Morris Co | |
| Passaic Co | |
| Somerset Co | |
| Sussex Co | |
| Union Co | |
| Warren Co | |
| NEW YORK (Region II) | |
| Bronx Co | |
| Kings Co | |
| Nassau Co | |
| New York Co | |
| Queens Co | |
| Richmond Co | |
| Rockland Co | |
| Suffolk Co | |
| Westchester Co | |
| Philadelphia-Wilmin-Atlantic City, PA-NJ-MD-DE | |
| DELAWARE (Region III) | |
| Kent Co | |
| New Castle Co | |
| Sussex Co | |
| MARYLAND (Region III) | |
| Cecil Co | |
| NEW JERSEY (Region II) | |
| Atlantic Co | |
| Burlington Co | |
| Camden Co | |
| Cape May Co | |
| Cumberland Co | |
| Gloucester Co | |
| Mercer Co | |
| Ocean Co | |
| Salem Co | |
| PENNSYLVANIA (Region III) | |
| Bucks Co | |
| Chester Co | |
| Delaware Co | |
| Montgomery Co | |
| Philadelphia Co | |
| Phoenix-Mesa, AZ | |
| ARIZONA (Region IX) | |
| Maricopa Co (P) | |
| Pinal Co (P) | |
| Pittsburgh-Beaver Valley, PA | |
| PENNSYLVANIA (Region III) | |
| Allegheny Co | |
| Armstrong Co | |
| Beaver Co | |
| Butler Co | |
| Fayette Co | |
| Washington Co | |
| Westmoreland Co | |
| Poughkeepsie, NY | |
| NEW YORK (Region II) | |
| Dutchess Co | |
| Orange Co | |
| Putnam Co | |
| Providence (All RI), RI | |
| RHODE ISLAND (Region I) | |
| Bristol Co | |
| Kent Co | |
| Newport Co | |
| Providence Co | |
| Washington Co | |
| Riverside Co, (Coachella Valley), CA | |
| CALIFORNIA (Region IX) | |
| Riverside Co (P) | |
| Rochester, NY | |
| NEW YORK (Region II) | |
| Genesee Co | |
| Livingston Co | |
| Monroe Co | |
| Ontario Co | |
| Orleans Co | |
| Wayne Co | |
| Sacramento Metro, CA | |
| CALIFORNIA (Region IX) | |
| El Dorado Co (P) | |
| Placer Co (P) | |
| Sacramento Co | |
| Solano Co (P) | |
| Sutter Co (P) | |
| Yolo Co | |
| San Diego, CA | |
| CALIFORNIA (Region IX) | |
| San Diego Co (P) | |
| San Francisco Bay Area, CA | |
| CALIFORNIA (Region IX) | |
| Alameda Co | |
| Contra Costa Co | |
| Marin Co | |
| Napa Co | |
| San Francisco Co | |
| San Mateo Co | |
| Santa Clara Co | |
| Solano Co (P) | |
| Sonoma Co (P) | |
| San Joaquin Valley, CA | |
| CALIFORNIA (Region IX) | |
| Fresno Co | |
| Kern Co (P) | |
| Kings Co | |
| Madera Co | |
| Merced Co | |
| San Joaquin Co | |
| Stanislaus Co | |
| Tulare Co | |
| Sheboygan, WI | |
| WISCONSIN (Region V) | |
| Sheboygan Co | |
| Springfield (Western MA), MA | |
| MASSACHUSETTS (Region I) | |
| Berkshire Co | |
| Franklin Co | |
| Hampden Co | |
| Hampshire Co | |
| St Louis, MO-IL (MO portion) | |
| MISSOURI (Region VII) | |
| Franklin Co | |
| Jefferson Co | |
| St Charles Co | |
| St Louis | |
| St Louis Co | |
| Sutter Co (Sutter Buttes), CA | |
| CALIFORNIA (Region IX) | |
| Sutter Co (P) | |
| Ventura Co, CA | |
| CALIFORNIA (Region IX) | |
| Ventura Co (P) | |
| Washington, DC-MD-VA | |
| DISTRICT OF COLUMBIA (Region III) | |
| Entire District | |
| MARYLAND (Region III) | |
| Calvert Co | |
| Charles Co | |
| Frederick Co | |
| Montgomery Co | |
| Prince George's Co | |
| VIRGINIA (Region III) | |
| Alexandria | |
| Arlington Co | |
| Fairfax | |
| Fairfax Co | |
| Falls Church | |
| Loudoun Co | |
| Manassas | |
| Manassas Park | |
| Prince William Co | |
Details about the designations and classifications of previous 1-hour ozone nonattainment and maintenance areas can be found here.
On June 8, 2007, the United States Court of Appeals vacated the Subpart 1 portion of the Phase 1 Rule (Court Order) (PDF). On May 14, 2012, the Former Subpart 1 nonattainment areas were classified under Subpart 2 (77 FR 28424 (PDF)), effective June 13, 2012.
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