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8-Hour Ozone (1997) Designated Area State/Area/County Report - NAAQS Revoked
8-Hour Ozone (1997) Designated Area State/Area/County Report - NAAQS Revoked
Data is current as of November 30, 2024View Notes
Area Name (Category/Classification) (P) Partial County
| ALABAMA (Region IV) | |
| Birmingham, AL (Former Subpart 1 - Maintenance) | |
| Jefferson County | |
| Shelby County | |
| ARIZONA (Region IX) | |
| Phoenix-Mesa, AZ (Marginal - Maintenance) | |
| Maricopa County (P) | |
| Pinal County (P) | |
| ARKANSAS (Region VI) | |
| Memphis, TN-AR (Moderate - Maintenance) | |
| Crittenden County | |
| CALIFORNIA (Region IX) | |
| Amador and Calaveras Cos. (Central Mountain Cos.), CA (Moderate - Nonattainment) | |
| Amador County | |
| Calaveras County | |
| Chico, CA (Marginal - Nonattainment) | |
| Butte County | |
| Imperial County, CA (Moderate - Nonattainment) | |
| Imperial County | |
| Kern County (Eastern Kern), CA (Moderate - Nonattainment) | |
| Kern County (P) | |
| Los Angeles and San Bernardino Counties (Western Mojave Desert), CA (Severe 15 - Nonattainment) | |
| Los Angeles County (P) | |
| San Bernardino County (P) | |
| Los Angeles-South Coast Air Basin, CA (Extreme - Nonattainment) | |
| Los Angeles County (P) | |
| Orange County | |
| Riverside County (P) | |
| San Bernardino County (P) | |
| Mariposa and Tuolumne Cos. (Southern Mountain Counties), CA (Moderate - Nonattainment) | |
| Mariposa County | |
| Tuolumne County | |
| Morongo Band of Mission Indians, CA (Severe 17 - Nonattainment) | |
| Riverside County (P) | |
| Nevada County (Western part), CA (Moderate - Nonattainment) | |
| Nevada County (P) | |
| Pechanga Band of Luiseno Mission Indians of the Pechanga Reservation, CA (Severe 17 - Maintenance) | |
| Riverside County (P) | |
| San Diego County (P) | |
| Riverside County (Coachella Valley), CA (Extreme - Nonattainment) | |
| Riverside County (P) | |
| Sacramento Metro, CA (Severe 15 - Nonattainment) | |
| El Dorado County (P) | |
| Placer County (P) | |
| Sacramento County | |
| Solano County (P) | |
| Sutter County (P) | |
| Yolo County | |
| San Diego, CA (Moderate - Maintenance) | |
| San Diego County (P) | |
| San Francisco Bay Area, CA (Marginal - Nonattainment) | |
| Alameda County | |
| Contra Costa County | |
| Marin County | |
| Napa County | |
| San Francisco County | |
| San Mateo County | |
| Santa Clara County | |
| Solano County (P) | |
| Sonoma County (P) | |
| San Joaquin Valley, CA (Extreme - Nonattainment) | |
| Fresno County | |
| Kern County (P) | |
| Kings County | |
| Madera County | |
| Merced County | |
| San Joaquin County | |
| Stanislaus County | |
| Tulare County | |
| Sutter County (part) (Sutter Buttes), CA (Marginal - Nonattainment) | |
| Sutter County (P) | |
| Ventura County (part), CA (Serious - Nonattainment) | |
| Ventura County (P) | |
| COLORADO (Region VIII) | |
| Denver-Boulder-Greeley-Ft. Collins-Loveland, CO (Marginal - Nonattainment) | |
| Adams County | |
| Arapahoe County | |
| Boulder County | |
| Broomfield County | |
| Denver County | |
| Douglas County | |
| Jefferson County | |
| Larimer County (P) | |
| Weld County (P) | |
| CONNECTICUT (Region I) | |
| Greater Connecticut, CT (Moderate - Nonattainment) | |
| Hartford County | |
| Litchfield County | |
| New London County | |
| Tolland County | |
| Windham County | |
| New York-N. New Jersey-Long Island, NY-NJ-CT (Moderate - Nonattainment) | |
| Fairfield County | |
| Middlesex County | |
| New Haven County | |
| DELAWARE (Region III) | |
| Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE (Moderate - Nonattainment) | |
| Kent County | |
| New Castle County | |
| Sussex County | |
| DISTRICT OF COLUMBIA (Region III) | |
| Washington, DC-MD-VA (Moderate - Nonattainment) | |
| District of Columbia | |
| GEORGIA (Region IV) | |
| Atlanta, GA (Moderate - Maintenance) | |
| Barrow County | |
| Bartow County | |
| Carroll County | |
| Cherokee County | |
| Clayton County | |
| Cobb County | |
| Coweta County | |
| DeKalb County | |
| Douglas County | |
| Fayette County | |
| Forsyth County | |
| Fulton County | |
| Gwinnett County | |
| Hall County | |
| Henry County | |
| Newton County | |
| Paulding County | |
| Rockdale County | |
| Spalding County | |
| Walton County | |
| Macon, GA (Former Subpart 1 - Maintenance) | |
| Bibb County | |
| Monroe County (P) | |
| Murray County (Chattahoochee Nat Forest), GA (Former Subpart 1 - Maintenance) | |
| Murray County (P) | |
| ILLINOIS (Region V) | |
| Chicago-Gary-Lake County, IL-IN (Moderate - Maintenance) | |
| Cook County | |
| DuPage County | |
| Grundy County (P) | |
| Aux Sable Township, Goose Lake Township | |
| Kane County | |
| Kendall County (P) | |
| Oswego Township | |
| Lake County | |
| McHenry County | |
| Will County | |
| St. Louis, MO-IL (Moderate - Maintenance) | |
| Jersey County | |
| Madison County | |
| Monroe County | |
| St. Clair County | |
| INDIANA (Region V) | |
| Chicago-Gary-Lake County, IL-IN (Moderate - Maintenance) | |
| Lake County | |
| Porter County | |
| Cincinnati-Hamilton, OH-KY-IN (Former Subpart 1 - Maintenance) | |
| Dearborn County (P) | |
| Lawrenceburg Township | |
| Evansville, IN (Former Subpart 1 - Maintenance) | |
| Vanderburgh County | |
| Warrick County | |
| Fort Wayne, IN (Former Subpart 1 - Maintenance) | |
| Allen County | |
| Greene County, IN (Former Subpart 1 - Maintenance) | |
| Greene County | |
| Indianapolis, IN (Former Subpart 1 - Maintenance) | |
| Boone County | |
| Hamilton County | |
| Hancock County | |
| Hendricks County | |
| Johnson County | |
| Madison County | |
| Marion County | |
| Morgan County | |
| Shelby County | |
| Jackson County, IN (Former Subpart 1 - Maintenance) | |
| Jackson County | |
| La Porte County, IN (Marginal - Maintenance) | |
| LaPorte County | |
| Louisville, KY-IN (Former Subpart 1 - Maintenance) | |
| Clark County | |
| Floyd County | |
| Muncie, IN (Former Subpart 1 - Maintenance) | |
| Delaware County | |
| South Bend-Elkhart, IN (Former Subpart 1 - Maintenance) | |
| Elkhart County | |
| St. Joseph County | |
| Terre Haute, IN (Former Subpart 1 - Maintenance) | |
| Vigo County | |
| KENTUCKY (Region IV) | |
| Cincinnati-Hamilton, OH-KY-IN (Former Subpart 1 - Maintenance) | |
| Boone County | |
| Campbell County | |
| Kenton County | |
| Clarksville-Hopkinsville, TN-KY (Former Subpart 1 - Maintenance) | |
| Christian County | |
| Huntington-Ashland, WV-KY (Former Subpart 1 - Maintenance) | |
| Boyd County | |
| Louisville, KY-IN (Former Subpart 1 - Maintenance) | |
| Bullitt County | |
| Jefferson County | |
| Oldham County | |
| LOUISIANA (Region VI) | |
| Baton Rouge, LA (Moderate - Maintenance) | |
| Ascension Parish | |
| East Baton Rouge Parish | |
| Iberville Parish | |
| Livingston Parish | |
| West Baton Rouge Parish | |
| MAINE (Region I) | |
| Hancock, Knox, Lincoln and Waldo Counties (Central Maine Coast), ME (Former Subpart 1 - Maintenance) | |
| Hancock County (P) | |
| Knox County (P) | |
| Lincoln County (P) | |
| Waldo County (P) | |
| (includes only the following town):Islesboro | |
| Portland, ME (Marginal - Maintenance) | |
| Androscoggin County (P) | |
| (includes only the following town): Durham | |
| Cumberland County (P) | |
| Sagadahoc County | |
| York County (P) | |
| MARYLAND (Region III) | |
| Baltimore, MD (Serious - Nonattainment) | |
| Anne Arundel County | |
| Baltimore County | |
| Baltimore city | |
| Carroll County | |
| Harford County | |
| Howard County | |
| Kent and Queen Anne's Counties, MD (Marginal - Maintenance) | |
| Kent County | |
| Queen Anne's County | |
| Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE (Moderate - Nonattainment) | |
| Cecil County | |
| Washington, DC-MD-VA (Moderate - Nonattainment) | |
| Calvert County | |
| Charles County | |
| Frederick County | |
| Montgomery County | |
| Prince George's County | |
| MASSACHUSETTS (Region I) | |
| Boston-Lawrence-Worcester (E. Mass), MA (Moderate - Nonattainment) | |
| Barnstable County | |
| Bristol County | |
| Dukes County | |
| Essex County | |
| Middlesex County | |
| Nantucket County | |
| Norfolk County | |
| Plymouth County | |
| Suffolk County | |
| Worcester County | |
| Springfield (W. Mass), MA (Moderate - Nonattainment) | |
| Berkshire County | |
| Franklin County | |
| Hampden County | |
| Hampshire County | |
| MICHIGAN (Region V) | |
| Allegan County, MI (Former Subpart 1 - Maintenance) | |
| Allegan County | |
| Benton Harbor, MI (Former Subpart 1 - Maintenance) | |
| Berrien County | |
| Benzie County, MI (Former Subpart 1 - Maintenance) | |
| Benzie County | |
| Cass County, MI (Marginal - Maintenance) | |
| Cass County | |
| Detroit-Ann Arbor, MI (Marginal - Maintenance) | |
| Lenawee County | |
| Livingston County | |
| Macomb County | |
| Monroe County | |
| Oakland County | |
| St. Clair County | |
| Washtenaw County | |
| Wayne County | |
| Flint, MI (Former Subpart 1 - Maintenance) | |
| Genesee County | |
| Lapeer County | |
| Grand Rapids, MI (Former Subpart 1 - Maintenance) | |
| Kent County | |
| Ottawa County | |
| Huron County, MI (Former Subpart 1 - Maintenance) | |
| Huron County | |
| Kalamazoo-Battle Creek, MI (Former Subpart 1 - Maintenance) | |
| Calhoun County | |
| Kalamazoo County | |
| Van Buren County | |
| Lansing-East Lansing, MI (Former Subpart 1 - Maintenance) | |
| Clinton County | |
| Eaton County | |
| Ingham County | |
| Mason County, MI (Former Subpart 1 - Maintenance) | |
| Mason County | |
| Muskegon, MI (Marginal - Maintenance) | |
| Muskegon County | |
| MISSOURI (Region VII) | |
| St. Louis, MO-IL (Moderate - Maintenance) | |
| Franklin County | |
| Jefferson County | |
| St. Charles County | |
| St. Louis County | |
| St. Louis city | |
| NEVADA (Region IX) | |
| Las Vegas, NV (Marginal - Maintenance) | |
| Clark County (P) | |
| NEW HAMPSHIRE (Region I) | |
| Boston-Manchester-Portsmouth (SE), NH (Moderate - Maintenance) | |
| Hillsborough County (P) | |
| Merrimack County (P) | |
| (includes only the following town): Hooksett | |
| Rockingham County (P) | |
| Strafford County (P) | |
| NEW JERSEY (Region II) | |
| New York-N. New Jersey-Long Island, NY-NJ-CT (Moderate - Nonattainment) | |
| Bergen County | |
| Essex County | |
| Hudson County | |
| Hunterdon County | |
| Middlesex County | |
| Monmouth County | |
| Morris County | |
| Passaic County | |
| Somerset County | |
| Sussex County | |
| Union County | |
| Warren County | |
| Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE (Moderate - Nonattainment) | |
| Atlantic County | |
| Burlington County | |
| Camden County | |
| Cape May County | |
| Cumberland County | |
| Gloucester County | |
| Mercer County | |
| Ocean County | |
| Salem County | |
| NEW YORK (Region II) | |
| Albany-Schenectady-Troy, NY (Marginal - Nonattainment) | |
| Albany County | |
| Greene County | |
| Montgomery County | |
| Rensselaer County | |
| Saratoga County | |
| Schenectady County | |
| Schoharie County | |
| Buffalo-Niagara Falls, NY (Moderate - Nonattainment) | |
| Erie County | |
| Niagara County | |
| Essex County (Whiteface Mtn.), NY (Marginal - Nonattainment) | |
| Essex County (P) | |
| Jamestown, NY (Moderate - Nonattainment) | |
| Chautauqua County | |
| Jefferson County, NY (Moderate - Nonattainment) | |
| Jefferson County | |
| New York-N. New Jersey-Long Island, NY-NJ-CT (Moderate - Nonattainment) | |
| Bronx County | |
| Kings County | |
| Nassau County | |
| New York County | |
| Queens County | |
| Richmond County | |
| Rockland County | |
| Suffolk County | |
| Westchester County | |
| Poughkeepsie, NY (Moderate - Nonattainment) | |
| Dutchess County | |
| Orange County | |
| Putnam County | |
| Rochester, NY (Marginal - Nonattainment) | |
| Genesee County | |
| Livingston County | |
| Monroe County | |
| Ontario County | |
| Orleans County | |
| Wayne County | |
| NORTH CAROLINA (Region IV) | |
| Charlotte-Gastonia-Rock Hill, NC-SC (Moderate - Maintenance) | |
| Cabarrus County | |
| Gaston County | |
| Iredell County (P) | |
| Davidson Township Coddle Creek Township | |
| Lincoln County | |
| Mecklenburg County | |
| Rowan County | |
| Union County | |
| Haywood and Swain Counties (Great Smoky NP), NC (Former Subpart 1 - Maintenance) | |
| Haywood County (P) | |
| Great Smoky Mountain National Park | |
| Swain County (P) | |
| Great Smoky Mountain National Park | |
| Raleigh-Durham-Chapel Hill, NC (Former Subpart 1 - Maintenance) | |
| Chatham County (P) | |
| Baldwin Township, Center Township, New Hope Township, Williams Township | |
| Durham County | |
| Franklin County | |
| Granville County | |
| Johnston County | |
| Orange County | |
| Person County | |
| Wake County | |
| Rocky Mount, NC (Former Subpart 1 - Maintenance) | |
| Edgecombe County | |
| Nash County | |
| OHIO (Region V) | |
| Canton-Massillon, OH (Former Subpart 1 - Maintenance) | |
| Stark County | |
| Cincinnati-Hamilton, OH-KY-IN (Former Subpart 1 - Maintenance) | |
| Butler County | |
| Clermont County | |
| Clinton County | |
| Hamilton County | |
| Warren County | |
| Cleveland-Akron-Lorain, OH (Moderate - Maintenance) | |
| Ashtabula County | |
| Cuyahoga County | |
| Geauga County | |
| Lake County | |
| Lorain County | |
| Medina County | |
| Portage County | |
| Summit County | |
| Columbus, OH (Former Subpart 1 - Maintenance) | |
| Delaware County | |
| Fairfield County | |
| Franklin County | |
| Knox County | |
| Licking County | |
| Madison County | |
| Dayton-Springfield, OH (Former Subpart 1 - Maintenance) | |
| Clark County | |
| Greene County | |
| Miami County | |
| Montgomery County | |
| Lima, OH (Former Subpart 1 - Maintenance) | |
| Allen County | |
| Parkersburg-Marietta, WV-OH (Former Subpart 1 - Maintenance) | |
| Washington County | |
| Steubenville-Weirton, OH-WV (Former Subpart 1 - Maintenance) | |
| Jefferson County | |
| Toledo, OH (Former Subpart 1 - Maintenance) | |
| Lucas County | |
| Wood County | |
| Wheeling, WV-OH (Former Subpart 1 - Maintenance) | |
| Belmont County | |
| Youngstown-Warren-Sharon, OH-PA (Former Subpart 1 - Maintenance) | |
| Columbiana County | |
| Mahoning County | |
| Trumbull County | |
| PENNSYLVANIA (Region III) | |
| Allentown-Bethlehem-Easton, PA (Former Subpart 1 - Maintenance) | |
| Carbon County | |
| Lehigh County | |
| Northampton County | |
| Altoona, PA (Former Subpart 1 - Maintenance) | |
| Blair County | |
| Clearfield and Indiana Counties, PA (Former Subpart 1 - Maintenance) | |
| Clearfield County | |
| Indiana County | |
| Erie, PA (Former Subpart 1 - Maintenance) | |
| Erie County | |
| Franklin County, PA (Former Subpart 1 - Maintenance) | |
| Franklin County | |
| Greene County, PA (Former Subpart 1 - Maintenance) | |
| Greene County | |
| Harrisburg-Lebanon-Carlisle, PA (Former Subpart 1 - Maintenance) | |
| Cumberland County | |
| Dauphin County | |
| Lebanon County | |
| Perry County | |
| Johnstown, PA (Former Subpart 1 - Maintenance) | |
| Cambria County | |
| Lancaster, PA (Marginal - Maintenance) | |
| Lancaster County | |
| Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE (Moderate - Nonattainment) | |
| Bucks County | |
| Chester County | |
| Delaware County | |
| Montgomery County | |
| Philadelphia County | |
| Pittsburgh-Beaver Valley, PA (Moderate - Nonattainment) | |
| Allegheny County | |
| Armstrong County | |
| Beaver County | |
| Butler County | |
| Fayette County | |
| Washington County | |
| Westmoreland County | |
| Reading, PA (Former Subpart 1 - Maintenance) | |
| Berks County | |
| Scranton-Wilkes-Barre, PA (Former Subpart 1 - Maintenance) | |
| Lackawanna County | |
| Luzerne County | |
| Monroe County | |
| Wyoming County | |
| State College, PA (Former Subpart 1 - Maintenance) | |
| Centre County | |
| Tioga County, PA (Former Subpart 1 - Maintenance) | |
| Tioga County | |
| York, PA (Former Subpart 1 - Maintenance) | |
| Adams County | |
| York County | |
| Youngstown-Warren-Sharon, OH-PA (Former Subpart 1 - Maintenance) | |
| Mercer County | |
| RHODE ISLAND (Region I) | |
| Providence (all of RI), RI (Moderate - Nonattainment) | |
| Bristol County | |
| Kent County | |
| Newport County | |
| Providence County | |
| Washington County | |
| SOUTH CAROLINA (Region IV) | |
| Charlotte-Gastonia-Rock Hill, NC-SC (Moderate - Maintenance) | |
| York County (P) | |
| Portion along MPO lines | |
| TENNESSEE (Region IV) | |
| Clarksville-Hopkinsville, TN-KY (Former Subpart 1 - Maintenance) | |
| Montgomery County | |
| Knoxville, TN (Former Subpart 1 - Maintenance) | |
| Anderson County | |
| Blount County | |
| Cocke County (P) | |
| (Great Smoky Mtn Park) | |
| Jefferson County | |
| Knox County | |
| Loudon County | |
| Sevier County | |
| Memphis, TN-AR (Moderate - Maintenance) | |
| Shelby County | |
| TEXAS (Region VI) | |
| Beaumont-Port Arthur, TX (Moderate - Maintenance) | |
| Hardin County | |
| Jefferson County | |
| Orange County | |
| Dallas-Fort Worth, TX (Serious - Nonattainment) | |
| Collin County | |
| Dallas County | |
| Denton County | |
| Ellis County | |
| Johnson County | |
| Kaufman County | |
| Parker County | |
| Rockwall County | |
| Tarrant County | |
| Houston-Galveston-Brazoria, TX (Severe 15 - Nonattainment) | |
| Brazoria County | |
| Chambers County | |
| Fort Bend County | |
| Galveston County | |
| Harris County | |
| Liberty County | |
| Montgomery County | |
| Waller County | |
| VIRGINIA (Region III) | |
| Fredericksburg, VA (Moderate - Maintenance) | |
| Fredericksburg city | |
| Spotsylvania County | |
| Stafford County | |
| Madison and Page Counties (Shenandoah NP), VA (Former Subpart 1 - Maintenance) | |
| Madison County (P) | |
| Page County (P) | |
| Norfolk-Virginia Beach-Newport News (Hampton Roads), VA (Marginal - Maintenance) | |
| Chesapeake city | |
| Gloucester County | |
| Hampton city | |
| Isle of Wight County | |
| James City County | |
| Newport News city | |
| Norfolk city | |
| Poquoson city | |
| Portsmouth city | |
| Suffolk city | |
| Virginia Beach city | |
| Williamsburg city | |
| York County | |
| Richmond-Petersburg, VA (Marginal - Maintenance) | |
| Charles City County | |
| Chesterfield County | |
| Colonial Heights city | |
| Hanover County | |
| Henrico County | |
| Hopewell city | |
| Petersburg city | |
| Prince George County | |
| Richmond city | |
| Washington, DC-MD-VA (Moderate - Nonattainment) | |
| Alexandria city | |
| Arlington County | |
| Fairfax County | |
| Fairfax city | |
| Falls Church city | |
| Loudoun County | |
| Manassas Park city | |
| Manassas city | |
| Prince William County | |
| WEST VIRGINIA (Region III) | |
| Charleston, WV (Former Subpart 1 - Maintenance) | |
| Kanawha County | |
| Putnam County | |
| Huntington-Ashland, WV-KY (Former Subpart 1 - Maintenance) | |
| Cabell County | |
| Wayne County | |
| Parkersburg-Marietta, WV-OH (Former Subpart 1 - Maintenance) | |
| Wood County | |
| Steubenville-Weirton, OH-WV (Former Subpart 1 - Maintenance) | |
| Brooke County | |
| Hancock County | |
| Wheeling, WV-OH (Former Subpart 1 - Maintenance) | |
| Marshall County | |
| Ohio County | |
| WISCONSIN (Region V) | |
| Door County, WI (Former Subpart 1 - Maintenance) | |
| Door County | |
| Inland Sheboygan County, WI (Moderate - Nonattainment) | |
| Sheboygan County (P) | |
| Kewaunee County, WI (Former Subpart 1 - Maintenance) | |
| Kewaunee County | |
| Manitowoc County, WI (Former Subpart 1 - Maintenance) | |
| Manitowoc County | |
| Milwaukee-Racine, WI (Moderate - Maintenance) | |
| Kenosha County | |
| Milwaukee County | |
| Ozaukee County | |
| Racine County | |
| Washington County | |
| Waukesha County | |
| Shoreline Sheboygan County, WI (Moderate - Nonattainment) | |
| Sheboygan County (P) | |
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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