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PM-2.5 (1997) Designated Area Area/State/County Report
PM-2.5 (1997) Designated Area Area/State/County Report
Data is current as of March 31, 2024| Atlanta, GA (Moderate - Maintenance) | |
| GEORGIA (Region IV) | |
| 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 | |
| Heard County (P) | |
| Henry County | |
| Newton County | |
| Paulding County | |
| Putnam County (P) | |
| Rockdale County | |
| Spalding County | |
| Walton County | |
| Baltimore, MD (Moderate - Maintenance) | |
| MARYLAND (Region III) | |
| Anne Arundel County | |
| Baltimore County | |
| Baltimore city | |
| Carroll County | |
| Harford County | |
| Howard County | |
| Birmingham, AL (Former Subpart 1 - Maintenance) | |
| ALABAMA (Region IV) | |
| Jefferson County | |
| Shelby County | |
| Walker County (P) | |
| Canton-Massillon, OH (Former Subpart 1 - Maintenance) | |
| OHIO (Region V) | |
| Stark County | |
| Charleston, WV (Former Subpart 1 - Maintenance) | |
| WEST VIRGINIA (Region III) | |
| Kanawha County | |
| Putnam County | |
| Chattanooga, TN-GA-AL (Moderate - Maintenance) | |
| ALABAMA (Region IV) | |
| Jackson County (P) | |
| GEORGIA (Region IV) | |
| Catoosa County | |
| Walker County | |
| TENNESSEE (Region IV) | |
| Hamilton County | |
| Chicago-Gary-Lake County, IL-IN (Former Subpart 1 - Maintenance) | |
| ILLINOIS (Region V) | |
| Cook County | |
| DuPage County | |
| Grundy County (P) | |
| Goose Lake and Aux Sable Townships | |
| Kane County | |
| Kendall County (P) | |
| Oswego Township | |
| Lake County | |
| McHenry County | |
| Will County | |
| INDIANA (Region V) | |
| Lake County | |
| Porter County | |
| Cincinnati-Hamilton, OH-KY-IN (Former Subpart 1 - Maintenance) | |
| INDIANA (Region V) | |
| Dearborn County (P) | |
| Lawrenceburg Township | |
| KENTUCKY (Region IV) | |
| Boone County | |
| Campbell County | |
| Kenton County | |
| OHIO (Region V) | |
| Butler County | |
| Clermont County | |
| Hamilton County | |
| Warren County | |
| Cleveland-Akron-Lorain, OH (Former Subpart 1 - Maintenance) | |
| OHIO (Region V) | |
| Ashtabula County (P) | |
| Ashtabula Township | |
| Cuyahoga County | |
| Lake County | |
| Lorain County | |
| Medina County | |
| Portage County | |
| Summit County | |
| Columbus, OH (Former Subpart 1 - Maintenance) | |
| OHIO (Region V) | |
| Coshocton County (P) | |
| Franklin Township | |
| Delaware County | |
| Fairfield County | |
| Franklin County | |
| Licking County | |
| Dayton-Springfield, OH (Former Subpart 1 - Maintenance) | |
| OHIO (Region V) | |
| Clark County | |
| Greene County | |
| Montgomery County | |
| Detroit-Ann Arbor, MI (Former Subpart 1 - Maintenance) | |
| MICHIGAN (Region V) | |
| Livingston County | |
| Macomb County | |
| Monroe County | |
| Oakland County | |
| St. Clair County | |
| Washtenaw County | |
| Wayne County | |
| Evansville, IN (Former Subpart 1 - Maintenance) | |
| INDIANA (Region V) | |
| Dubois County | |
| Gibson County (P) | |
| Montgomery Township | |
| Pike County (P) | |
| Washington Township | |
| Spencer County (P) | |
| Ohio Township | |
| Vanderburgh County | |
| Warrick County | |
| Greensboro-Winston Salem-High Point, NC (Former Subpart 1 - Maintenance) | |
| NORTH CAROLINA (Region IV) | |
| Davidson County | |
| Guilford County | |
| Harrisburg-Lebanon-Carlisle, PA (Moderate - Maintenance) | |
| PENNSYLVANIA (Region III) | |
| Cumberland County | |
| Dauphin County | |
| Lebanon County | |
| Hickory-Morganton-Lenoir, NC (Former Subpart 1 - Maintenance) | |
| NORTH CAROLINA (Region IV) | |
| Catawba County | |
| Huntington-Ashland, WV-KY-OH (Former Subpart 1 - Maintenance) | |
| KENTUCKY (Region IV) | |
| Boyd County | |
| Lawrence County (P) | |
| OHIO (Region V) | |
| Adams County (P) | |
| Monroe Township, Sprigg Township | |
| Gallia County (P) | |
| Cheshire Township | |
| Lawrence County | |
| Scioto County | |
| WEST VIRGINIA (Region III) | |
| Cabell County | |
| Mason County (P) | |
| Graham Tax District | |
| Wayne County | |
| Indianapolis, IN (Former Subpart 1 - Maintenance) | |
| INDIANA (Region V) | |
| Hamilton County | |
| Hendricks County | |
| Johnson County | |
| Marion County | |
| Morgan County | |
| Johnstown, PA (Moderate - Maintenance) | |
| PENNSYLVANIA (Region III) | |
| Cambria County | |
| Indiana County (P) | |
| Knoxville, TN (Moderate - Maintenance) | |
| TENNESSEE (Region IV) | |
| Anderson County | |
| Blount County | |
| Knox County | |
| Loudon County | |
| Roane County (P) | |
| Lancaster, PA (Moderate - Maintenance) | |
| PENNSYLVANIA (Region III) | |
| Lancaster County | |
| Libby, MT (Moderate - Maintenance) | |
| MONTANA (Region VIII) | |
| Lincoln County (P) | |
| Liberty-Clairton, PA (Moderate - Nonattainment) | |
| PENNSYLVANIA (Region III) | |
| Allegheny County (P) | |
| Lincoln Borough, Clairton City, Glassport Borough, Liberty Borough, Port Vue Borough | |
| Los Angeles-South Coast Air Basin, CA (Moderate - Nonattainment) | |
| CALIFORNIA (Region IX) | |
| Los Angeles County (P) | |
| Orange County | |
| Riverside County (P) | |
| San Bernardino County (P) | |
| Louisville, KY-IN (Moderate - Maintenance) | |
| INDIANA (Region V) | |
| Clark County | |
| Floyd County | |
| Jefferson County (P) | |
| Madison Township | |
| KENTUCKY (Region IV) | |
| Bullitt County | |
| Jefferson County | |
| Macon, GA (Former Subpart 1 - Maintenance) | |
| GEORGIA (Region IV) | |
| Bibb County | |
| Monroe County (P) | |
| Martinsburg-Hagerstown, WV-MD (Moderate - Maintenance) | |
| MARYLAND (Region III) | |
| Washington County | |
| WEST VIRGINIA (Region III) | |
| Berkeley County | |
| New York-N. New Jersey-Long Island, NY-NJ-CT (Former Subpart 1 - Maintenance) | |
| CONNECTICUT (Region I) | |
| Fairfield County | |
| New Haven County | |
| NEW JERSEY (Region II) | |
| Bergen County | |
| Essex County | |
| Hudson County | |
| Mercer County | |
| Middlesex County | |
| Monmouth County | |
| Morris County | |
| Passaic County | |
| Somerset County | |
| Union County | |
| NEW YORK (Region II) | |
| Bronx County | |
| Kings County | |
| Nassau County | |
| New York County | |
| Orange County | |
| Queens County | |
| Richmond County | |
| Rockland County | |
| Suffolk County | |
| Westchester County | |
| Parkersburg-Marietta, WV-OH (Former Subpart 1 - Maintenance) | |
| OHIO (Region V) | |
| Washington County | |
| WEST VIRGINIA (Region III) | |
| Pleasants County (P) | |
| Tax District of Grant | |
| Wood County | |
| Philadelphia-Wilmington, PA-NJ-DE (Moderate - Maintenance) | |
| DELAWARE (Region III) | |
| New Castle County | |
| NEW JERSEY (Region II) | |
| Burlington County | |
| Camden County | |
| Gloucester County | |
| PENNSYLVANIA (Region III) | |
| Bucks County | |
| Chester County | |
| Delaware County | |
| Montgomery County | |
| Philadelphia County | |
| Pittsburgh-Beaver Valley, PA (Moderate - Maintenance) | |
| PENNSYLVANIA (Region III) | |
| Allegheny County (P) | |
| Remainder | |
| Armstrong County (P) | |
| Elderton Borough and Plumcreek and Washington Townships | |
| Beaver County | |
| Butler County | |
| Greene County (P) | |
| Monongahela Township | |
| Lawrence County (P) | |
| Township of Taylor south of New Castle City | |
| Washington County | |
| Westmoreland County | |
| Reading, PA (Moderate - Maintenance) | |
| PENNSYLVANIA (Region III) | |
| Berks County | |
| Rome, GA (Former Subpart 1 - Maintenance) | |
| GEORGIA (Region IV) | |
| Floyd County | |
| San Joaquin Valley, CA (Serious - Nonattainment) | |
| CALIFORNIA (Region IX) | |
| Fresno County | |
| Kern County (P) | |
| Kings County | |
| Madera County | |
| Merced County | |
| San Joaquin County | |
| Stanislaus County | |
| Tulare County | |
| St. Louis, MO-IL (Moderate - Maintenance) | |
| ILLINOIS (Region V) | |
| Madison County | |
| Monroe County | |
| Randolph County (P) | |
| Baldwin Village | |
| St. Clair County | |
| MISSOURI (Region VII) | |
| Franklin County | |
| Jefferson County | |
| St. Charles County | |
| St. Louis County | |
| St. Louis city | |
| Steubenville-Weirton, OH-WV (Former Subpart 1 - Maintenance) | |
| OHIO (Region V) | |
| Jefferson County | |
| WEST VIRGINIA (Region III) | |
| Brooke County | |
| Hancock County | |
| Washington, DC-MD-VA (Moderate - Maintenance) | |
| DISTRICT OF COLUMBIA (Region III) | |
| District of Columbia | |
| MARYLAND (Region III) | |
| Charles County | |
| Frederick County | |
| Montgomery County | |
| Prince George's County | |
| VIRGINIA (Region III) | |
| Alexandria city | |
| Arlington County | |
| Fairfax County | |
| Fairfax city | |
| Falls Church city | |
| Loudoun County | |
| Manassas Park city | |
| Manassas city | |
| Prince William County | |
| Wheeling, WV-OH (Former Subpart 1 - Maintenance) | |
| OHIO (Region V) | |
| Belmont County | |
| WEST VIRGINIA (Region III) | |
| Marshall County | |
| Ohio County | |
| York, PA (Moderate - Maintenance) | |
| PENNSYLVANIA (Region III) | |
| York County | |
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