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PM-2.5 (1997) Maintenance Area (Redesignated from Nonattainment) Area/State/County Report

Data is current as of May 31, 2019

The 1997 Primary Annual PM-2.5 NAAQS (level of 15 µg/m3) is revoked in attainment and maintenance areas for that NAAQS. For additional information see the PM-2.5 NAAQS SIP Requirements Final Rule, effective October 24, 2016. (81 FR 58009)


  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
 
  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, WV-Hagerstown, 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
 
  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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