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1-Hour Ozone (1979) Designated Area State/Area/County Report - NAAQS Revoked
1-Hour Ozone (1979) Designated Area State/Area/County Report - NAAQS Revoked
Data is current as of March 31, 2024| ALABAMA (Region IV) | |
| Birmingham, AL (Marginal - Maintenance) | |
| Jefferson County | |
| Shelby County | |
| ARIZONA (Region IX) | |
| Phoenix, AZ (Serious - Maintenance) | |
| Maricopa County (P) | |
| Maricopa Association of Governments Urban Planning Area | |
| CALIFORNIA (Region IX) | |
| Chico, CA (Section 185A - Nonattainment) | |
| Butte County | |
| East Kern County, CA (Serious - Maintenance) | |
| Kern County (P) | |
| Imperial County, CA (Section 185A - Nonattainment) | |
| Imperial County | |
| Los Angeles-South Coast Air Basin, CA (Extreme - Nonattainment) | |
| Los Angeles County (P) | |
| Orange County | |
| Riverside County (P) | |
| San Bernardino County (P) | |
| Monterey Bay, CA (Moderate - Maintenance) | |
| Monterey County | |
| San Benito County | |
| Santa Cruz County | |
| Morongo Band of Mission Indians, CA (Severe-17 - Nonattainment) | |
| Riverside County (P) | |
| Sacramento Metro, CA (Severe-15 - Nonattainment) | |
| El Dorado County (P) | |
| (excluding Lake Tahoe Air Basin) | |
| Placer County (P) | |
| (excluding Lake Tahoe Air Basin) | |
| Sacramento County | |
| Solano County (P) | |
| Northeastern portion | |
| Sutter County (P) | |
| Southern portion | |
| Yolo County | |
| San Diego, CA (Serious - Maintenance) | |
| San Diego County | |
| San Francisco-Bay Area, CA (Other - Nonattainment) | |
| Alameda County | |
| Contra Costa County | |
| Marin County | |
| Napa County | |
| San Francisco County | |
| San Mateo County | |
| Santa Clara County | |
| Solano County (P) | |
| Southwestern portion | |
| Sonoma County (P) | |
| Southern portion | |
| San Joaquin Valley, CA (Extreme - Nonattainment) | |
| Fresno County | |
| Kern County (P) | |
| Kings County | |
| Madera County | |
| Merced County | |
| San Joaquin County | |
| Stanislaus County | |
| Tulare County | |
| Santa Barbara-Santa Maria-Lompoc, CA (Serious - Maintenance) | |
| Santa Barbara County | |
| Southeast Desert Modified AQMA, CA (Severe-17 - Nonattainment) | |
| Los Angeles County (P) | |
| Riverside County (P) | |
| San Bernardino County (P) | |
| Ventura County, CA (Severe-15 - Nonattainment) | |
| Ventura County | |
| Yuba City, CA (Section 185A - Nonattainment) | |
| Sutter County (P) | |
| Northern portion | |
| Yuba County | |
| COLORADO (Region VIII) | |
| Denver-Boulder, CO (Section 185A - Maintenance) | |
| Adams County (P) | |
| West of Kiowa Creek | |
| Arapahoe County (P) | |
| West of Kiowa Creek | |
| Boulder County (P) | |
| Excluding Rocky Mtn. National Park | |
| Broomfield County | |
| Denver County | |
| Douglas County | |
| Jefferson County | |
| CONNECTICUT (Region I) | |
| Greater Connecticut, CT (Serious - Nonattainment) | |
| Fairfield County (P) | |
| Shelton City | |
| Hartford County | |
| Litchfield County (P) | |
| All cities and townships except: Bridgewater Town, New Milford Town | |
| Middlesex County | |
| New Haven County | |
| New London County | |
| Tolland County | |
| Windham County | |
| New York-N. New Jersey-Long Island, NY-NJ-CT (Severe-17 - Nonattainment) | |
| Fairfield County (P) | |
| All cities and townships except Shelton City | |
| Litchfield County (P) | |
| Bridgewater Town, New Milford Town | |
| DELAWARE (Region III) | |
| Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD (Severe-15 - Nonattainment) | |
| Kent County | |
| New Castle County | |
| Sussex County, DE (Marginal - Nonattainment) | |
| Sussex County | |
| DISTRICT OF COLUMBIA (Region III) | |
| Washington, DC-MD-VA (Severe-15 - Nonattainment) | |
| District of Columbia | |
| FLORIDA (Region IV) | |
| Jacksonville, FL (Section 185A - Maintenance) | |
| Duval County | |
| Miami-Fort Lauderdale-W. Palm Beach, FL (Moderate - Maintenance) | |
| Broward County | |
| Miami-Dade County | |
| Palm Beach County | |
| Tampa-St. Petersburg-Clearwater, FL (Marginal - Maintenance) | |
| Hillsborough County | |
| Pinellas County | |
| GEORGIA (Region IV) | |
| Atlanta, GA (Severe-15 - Maintenance) | |
| Cherokee County | |
| Clayton County | |
| Cobb County | |
| Coweta County | |
| DeKalb County | |
| Douglas County | |
| Fayette County | |
| Forsyth County | |
| Fulton County | |
| Gwinnett County | |
| Henry County | |
| Paulding County | |
| Rockdale County | |
| ILLINOIS (Region V) | |
| Chicago-Gary-Lake County, IL-IN (Severe-17 - Nonattainment) | |
| Cook County | |
| DuPage County | |
| Grundy County (P) | |
| Aux Sable Township, Gooselake Township | |
| Kane County | |
| Kendall County (P) | |
| Oswego Township | |
| Lake County | |
| McHenry County | |
| Will County | |
| Jersey County, IL (Marginal - Maintenance) | |
| Jersey County | |
| St. Louis, MO-IL (Serious - Maintenance) | |
| Madison County | |
| Monroe County | |
| St. Clair County | |
| INDIANA (Region V) | |
| Chicago-Gary-Lake County, IL-IN (Severe-17 - Nonattainment) | |
| Lake County | |
| Porter County | |
| Evansville, IN (Marginal - Maintenance) | |
| Vanderburgh County | |
| Indianapolis, IN (Marginal - Maintenance) | |
| Marion County | |
| Louisville, KY-IN (Moderate - Maintenance) | |
| Clark County | |
| Floyd County | |
| South Bend-Elkhart, IN (Marginal - Maintenance) | |
| Elkhart County | |
| St. Joseph County | |
| KANSAS (Region VII) | |
| Kansas City, MO-KS (Other - Maintenance) | |
| Johnson County | |
| Wyandotte County | |
| KENTUCKY (Region IV) | |
| Cincinnati-Hamilton, OH-KY (Moderate - Maintenance) | |
| Boone County | |
| Campbell County | |
| Kenton County | |
| Edmonson County, KY (Rural Transport (Marginal) - Maintenance) | |
| Edmonson County | |
| Huntington-Ashland, WV-KY (Moderate - Maintenance) | |
| Boyd County | |
| Greenup County (P) | |
| Lexington-Fayette, KY (Marginal - Maintenance) | |
| Fayette County | |
| Scott County | |
| Louisville, KY-IN (Moderate - Maintenance) | |
| Bullitt County (P) | |
| Jefferson County | |
| Oldham County (P) | |
| Owensboro, KY (Marginal - Maintenance) | |
| Daviess County | |
| Hancock County (P) | |
| Paducah, KY (Marginal - Maintenance) | |
| Livingston County (P) | |
| Marshall County | |
| LOUISIANA (Region VI) | |
| Baton Rouge, LA (Severe-15 - Nonattainment) | |
| Ascension Parish | |
| East Baton Rouge Parish | |
| Iberville Parish | |
| Livingston Parish | |
| West Baton Rouge Parish | |
| Beauregard Parish, LA (Incomplete Data - Maintenance) | |
| Beauregard Parish | |
| Grant Parish, LA (Incomplete Data - Maintenance) | |
| Grant Parish | |
| Lafayette, LA (Section 185A - Maintenance) | |
| Lafayette Parish | |
| Lafourche Parish, LA (Incomplete Data - Maintenance) | |
| Lafourche Parish | |
| Lake Charles, LA (Marginal - Maintenance) | |
| Calcasieu Parish | |
| New Orleans, LA (Section 185A - Maintenance) | |
| Jefferson Parish | |
| Orleans Parish | |
| St. Bernard Parish | |
| St. Charles Parish | |
| Pointe Coupee Parish, LA (Marginal - Maintenance) | |
| Pointe Coupee Parish | |
| St. James Parish, LA (Incomplete Data - Maintenance) | |
| St. James Parish | |
| St. Mary Parish, LA (Incomplete Data - Maintenance) | |
| St. Mary Parish | |
| MAINE (Region I) | |
| Hancock County and Waldo County, ME (Marginal - Maintenance) | |
| Hancock County | |
| Waldo County | |
| Knox County and Lincoln County, ME (Moderate - Nonattainment) | |
| Knox County | |
| Lincoln County | |
| Lewiston-Auburn, ME (Moderate - Nonattainment) | |
| Androscoggin County | |
| Kennebec County | |
| Portland, ME (Moderate - Nonattainment) | |
| Cumberland County | |
| Sagadahoc County | |
| York County | |
| MARYLAND (Region III) | |
| Baltimore, MD (Severe-15 - Nonattainment) | |
| Anne Arundel County | |
| Baltimore County | |
| Baltimore city | |
| Carroll County | |
| Harford County | |
| Howard County | |
| Kent County and Queen Anne's County, MD (Marginal - Maintenance) | |
| Kent County | |
| Queen Anne's County | |
| Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD (Severe-15 - Nonattainment) | |
| Cecil County | |
| Washington, DC-MD-VA (Severe-15 - Nonattainment) | |
| Calvert County | |
| Charles County | |
| Frederick County | |
| Montgomery County | |
| Prince George's County | |
| MASSACHUSETTS (Region I) | |
| Boston-Lawrence-Worcester (E. Mass), MA-NH (Serious - Nonattainment) | |
| Barnstable County | |
| Bristol County | |
| Dukes County | |
| Essex County | |
| Middlesex County | |
| Nantucket County | |
| Norfolk County | |
| Plymouth County | |
| Suffolk County | |
| Worcester County | |
| Springfield (Western MA), MA (Serious - Nonattainment) | |
| Berkshire County | |
| Franklin County | |
| Hampden County | |
| Hampshire County | |
| MICHIGAN (Region V) | |
| Allegan County, MI (Incomplete Data - Maintenance) | |
| Allegan County | |
| Detroit-Ann Arbor, MI (Moderate - Maintenance) | |
| Livingston County | |
| Macomb County | |
| Monroe County | |
| Oakland County | |
| St. Clair County | |
| Washtenaw County | |
| Wayne County | |
| Flint, MI (Section 185A - Maintenance) | |
| Genesee County | |
| Grand Rapids, MI (Moderate - Maintenance) | |
| Kent County | |
| Ottawa County | |
| Muskegon, MI (Moderate - Maintenance) | |
| Muskegon County | |
| Saginaw-Bay City-Midland, MI (Incomplete Data - Maintenance) | |
| Bay County | |
| Midland County | |
| Saginaw County | |
| MISSOURI (Region VII) | |
| Kansas City, MO-KS (Other - Maintenance) | |
| Clay County | |
| Jackson County | |
| Platte County | |
| St. Louis, MO-IL (Serious - Maintenance) | |
| Franklin County | |
| Jefferson County | |
| St. Charles County | |
| St. Louis County | |
| St. Louis city | |
| NEVADA (Region IX) | |
| Reno, NV (Marginal - Nonattainment) | |
| Washoe County | |
| NEW HAMPSHIRE (Region I) | |
| Boston-Lawrence-Worcester (E. Mass), MA-NH (Serious - Nonattainment) | |
| Hillsborough County (P) | |
| Rockingham County (P) | |
| Cheshire County, NH (Incomplete Data - Nonattainment) | |
| Cheshire County | |
| Manchester, NH (Marginal - Nonattainment) | |
| Hillsborough County (P) | |
| Merrimack County | |
| Rockingham County (P) | |
| Portsmouth-Dover-Rochester, NH (Serious - Nonattainment) | |
| Rockingham County (P) | |
| Strafford County | |
| NEW JERSEY (Region II) | |
| Allentown-Bethlehem-Easton, PA-NJ (Marginal - Nonattainment) | |
| Warren County | |
| Atlantic City, NJ (Moderate - Nonattainment) | |
| Atlantic County | |
| Cape May County | |
| New York-N. New Jersey-Long Island, NY-NJ-CT (Severe-17 - Nonattainment) | |
| Bergen County | |
| Essex County | |
| Hudson County | |
| Hunterdon County | |
| Middlesex County | |
| Monmouth County | |
| Morris County | |
| Ocean County | |
| Passaic County | |
| Somerset County | |
| Sussex County | |
| Union County | |
| Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD (Severe-15 - Nonattainment) | |
| Burlington County | |
| Camden County | |
| Cumberland County | |
| Gloucester County | |
| Mercer County | |
| Salem County | |
| NEW MEXICO (Region VI) | |
| Dona Ana County (part); Sunland Park, NM (Marginal - Nonattainment) | |
| Dona Ana County (P) | |
| NEW YORK (Region II) | |
| Albany-Schenectady-Troy, NY (Marginal - Nonattainment) | |
| Albany County | |
| Greene County | |
| Montgomery County | |
| Rensselaer County | |
| Saratoga County | |
| Schenectady County | |
| Buffalo-Niagara Falls, NY (Marginal - Nonattainment) | |
| Erie County | |
| Niagara County | |
| Essex County; Whiteface Mountain, NY (Rural Transport (Marginal) - Nonattainment) | |
| Essex County (P) | |
| Jefferson County, NY (Marginal - Nonattainment) | |
| Jefferson County | |
| New York-N. New Jersey-Long Island, NY-NJ-CT (Severe-17 - Nonattainment) | |
| Bronx County | |
| Kings County | |
| Nassau County | |
| New York County | |
| Orange County (P) | |
| Queens County | |
| Richmond County | |
| Rockland County | |
| Suffolk County | |
| Westchester County | |
| Poughkeepsie, NY (Moderate - Nonattainment) | |
| Dutchess County | |
| Orange County (P) | |
| Remainder of County | |
| Putnam County | |
| NORTH CAROLINA (Region IV) | |
| Charlotte-Gastonia, NC (Moderate - Maintenance) | |
| Gaston County | |
| Mecklenburg County | |
| Greensboro-Winston-Salem-High Point, NC (Moderate - Maintenance) | |
| Davidson County | |
| Davie County (P) | |
| Forsyth County | |
| Guilford County | |
| Raleigh-Durham, NC (Moderate - Maintenance) | |
| Durham County | |
| Granville County (P) | |
| Dutchville Township | |
| Wake County | |
| OHIO (Region V) | |
| Canton, OH (Marginal - Maintenance) | |
| Stark County | |
| Cincinnati-Hamilton, OH-KY (Moderate - Maintenance) | |
| Butler County | |
| Clermont 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 | |
| Clinton County, OH (Section 185A - Maintenance) | |
| Clinton County | |
| Columbiana County, OH (Incomplete Data - Maintenance) | |
| Columbiana County | |
| Columbus, OH (Marginal - Maintenance) | |
| Delaware County | |
| Franklin County | |
| Licking County | |
| Dayton-Springfield, OH (Moderate - Maintenance) | |
| Clark County | |
| Greene County | |
| Miami County | |
| Montgomery County | |
| Preble County, OH (Section 185A - Maintenance) | |
| Preble County | |
| Steubenville, OH (Section 185A - Maintenance) | |
| Jefferson County | |
| Toledo, OH (Moderate - Maintenance) | |
| Lucas County | |
| Wood County | |
| Youngstown-Warren-Sharon, OH-PA (OH portion) (Marginal - Maintenance) | |
| Mahoning County | |
| Trumbull County | |
| OREGON (Region X) | |
| Portland-Vancouver AQMA, OR-WA (Marginal - Maintenance) | |
| Clackamas County (P) | |
| Air Quality Maintenance Area | |
| Multnomah County (P) | |
| Air Quality Maintenance Area | |
| Washington County (P) | |
| Air Quality Maintenance Area | |
| Salem, OR (Incomplete Data - Nonattainment) | |
| Marion County (P) | |
| Salem Area Transportation Study | |
| Polk County (P) | |
| Salem Area Transportation Study | |
| PENNSYLVANIA (Region III) | |
| Allentown-Bethlehem-Easton, PA-NJ (Marginal - Nonattainment) | |
| Carbon County | |
| Lehigh County | |
| Northampton County | |
| Altoona, PA (Marginal - Nonattainment) | |
| Blair County | |
| Crawford County, PA (Incomplete Data - Nonattainment) | |
| Crawford County | |
| Erie, PA (Marginal - Nonattainment) | |
| Erie County | |
| Franklin County, PA (Incomplete Data - Nonattainment) | |
| Franklin County | |
| Greene County, PA (Incomplete Data - Nonattainment) | |
| Greene County | |
| Harrisburg-Lebanon-Carlisle, PA (Marginal - Nonattainment) | |
| Cumberland County | |
| Dauphin County | |
| Lebanon County | |
| Perry County | |
| Johnstown, PA (Marginal - Nonattainment) | |
| Cambria County | |
| Somerset County | |
| Juniata County, PA (Incomplete Data - Nonattainment) | |
| Juniata County | |
| Lancaster, PA (Marginal - Nonattainment) | |
| Lancaster County | |
| Lawrence County, PA (Incomplete Data - Nonattainment) | |
| Lawrence County | |
| Northumberland County, PA (Incomplete Data - Nonattainment) | |
| Northumberland County | |
| Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD (Severe-15 - Nonattainment) | |
| Bucks County | |
| Chester County | |
| Delaware County | |
| Montgomery County | |
| Philadelphia County | |
| Pike County, PA (Incomplete Data - Nonattainment) | |
| Pike County | |
| Pittsburgh-Beaver Valley, PA (Moderate - Maintenance) | |
| Allegheny County | |
| Armstrong County | |
| Beaver County | |
| Butler County | |
| Fayette County | |
| Washington County | |
| Westmoreland County | |
| Reading, PA (Moderate - Maintenance) | |
| Berks County | |
| Schuylkill County, PA (Incomplete Data - Nonattainment) | |
| Schuylkill County | |
| Scranton-Wilkes-Barre, PA (Marginal - Nonattainment) | |
| Columbia County | |
| Lackawanna County | |
| Luzerne County | |
| Monroe County | |
| Wyoming County | |
| Snyder County, PA (Incomplete Data - Nonattainment) | |
| Snyder County | |
| Susquehanna County, PA (Incomplete Data - Nonattainment) | |
| Susquehanna County | |
| Warren County, PA (Incomplete Data - Nonattainment) | |
| Warren County | |
| Wayne County, PA (Incomplete Data - Nonattainment) | |
| Wayne County | |
| York, PA (Marginal - Nonattainment) | |
| Adams County | |
| York County | |
| Youngstown-Warren-Sharon, OH-PA (PA portion) (Marginal - Nonattainment) | |
| Mercer County | |
| RHODE ISLAND (Region I) | |
| Providence (all of RI), RI (Serious - Nonattainment) | |
| Bristol County | |
| Kent County | |
| Newport County | |
| Providence County | |
| Washington County | |
| SOUTH CAROLINA (Region IV) | |
| Cherokee County, SC (Marginal - Maintenance) | |
| Cherokee County | |
| TENNESSEE (Region IV) | |
| Knoxville, TN (Marginal - Maintenance) | |
| Knox County | |
| Memphis, TN (Marginal - Maintenance) | |
| Shelby County | |
| Nashville, TN (Moderate - Maintenance) | |
| Davidson County | |
| Rutherford County | |
| Sumner County | |
| Williamson County | |
| Wilson County | |
| TEXAS (Region VI) | |
| Beaumont-Port Arthur, TX (Serious - Nonattainment) | |
| Hardin County | |
| Jefferson County | |
| Orange County | |
| Dallas-Fort Worth, TX (Serious - Nonattainment) | |
| Collin County | |
| Dallas County | |
| Denton County | |
| Tarrant County | |
| El Paso, TX (Serious - Nonattainment) | |
| El Paso County | |
| Houston-Galveston-Brazoria, TX (Severe-17 - Nonattainment) | |
| Brazoria County | |
| Chambers County | |
| Fort Bend County | |
| Galveston County | |
| Harris County | |
| Liberty County | |
| Montgomery County | |
| Waller County | |
| Victoria, TX (Incomplete Data - Maintenance) | |
| Victoria County | |
| UTAH (Region VIII) | |
| Salt Lake City, UT (Moderate - Maintenance) | |
| Davis County | |
| Salt Lake County | |
| VIRGINIA (Region III) | |
| Norfolk-Virginia Beach-Newport News (Hampton Roads), VA (Marginal - Maintenance) | |
| Chesapeake city | |
| Hampton city | |
| James City County | |
| Newport News city | |
| Norfolk city | |
| Poquoson city | |
| Portsmouth city | |
| Suffolk city | |
| Virginia Beach city | |
| Williamsburg city | |
| York County | |
| Richmond, VA (Moderate - Maintenance) | |
| Charles City County (P) | |
| Chesterfield County | |
| Colonial Heights city | |
| Hanover County | |
| Henrico County | |
| Hopewell city | |
| Richmond city | |
| Smyth County; White Top Mountain, VA (Rural Transport (Marginal) - Nonattainment) | |
| Smyth County (P) | |
| Washington, DC-MD-VA (Severe-15 - Nonattainment) | |
| Alexandria city | |
| Arlington County | |
| Fairfax County | |
| Fairfax city | |
| Falls Church city | |
| Loudoun County | |
| Manassas Park city | |
| Manassas city | |
| Prince William County | |
| Stafford County | |
| WASHINGTON (Region X) | |
| Portland-Vancouver AQMA, OR-WA (Marginal - Maintenance) | |
| Clark County (P) | |
| Air Quality Maintenance Area | |
| Seattle-Tacoma, WA (Marginal - Maintenance) | |
| King County (P) | |
| Pierce County | |
| Snohomish County (P) | |
| WEST VIRGINIA (Region III) | |
| Charleston, WV (Moderate - Maintenance) | |
| Kanawha County | |
| Putnam County | |
| Greenbrier, WV (Marginal - Maintenance) | |
| Greenbrier County | |
| Huntington-Ashland, WV-KY (Moderate - Maintenance) | |
| Cabell County | |
| Wayne County | |
| Parkersburg-Marietta, WV (Moderate - Maintenance) | |
| Wood County | |
| WISCONSIN (Region V) | |
| Door County, WI (Rural Transport (Marginal) - Maintenance) | |
| Door County | |
| Kewaunee County, WI (Moderate - Maintenance) | |
| Kewaunee County | |
| Manitowoc County, WI (Moderate - Maintenance) | |
| Manitowoc County | |
| Milwaukee-Racine, WI (Severe-17 - Nonattainment) | |
| Kenosha County | |
| Milwaukee County | |
| Ozaukee County | |
| Racine County | |
| Washington County | |
| Waukesha County | |
| Sheboygan, WI (Moderate - Maintenance) | |
| Sheboygan County | |
| Walworth County, WI (Marginal - Maintenance) | |
| Walworth County | |
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