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1-Hour Ozone (1979) Nonattainment Area State/Area/County Report - NAAQS Revoked

Data is current as of June 30, 2021


CALIFORNIA (Region IX)
  Chico, CA (Section 185A - Nonattainment)
Butte County
 
  Imperial Co, 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)
 
  Morongo Band of Mission Indians (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 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
 
  Southeast Desert Modified AQMA, CA (Severe-17 - Nonattainment)
Los Angeles County (P)
Riverside County (P)
San Bernardino County (P)
 
  Ventura Co, CA (Severe-15 - Nonattainment)
Ventura County
 
  Yuba City, CA (Section 185A - Nonattainment)
Sutter County (P)
Northern portion
Yuba 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 Co, DE (Marginal - Nonattainment)
Sussex County
 
DISTRICT OF COLUMBIA (Region III)
  Washington, DC-MD-VA (Severe-15 - Nonattainment)
District of Columbia
 
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
 
INDIANA (Region V)
  Chicago-Gary-Lake County, IL-IN (Severe-17 - Nonattainment)
Lake County
Porter County
 
LOUISIANA (Region VI)
  Baton Rouge, LA (Severe-15 - Nonattainment)
Ascension Parish
East Baton Rouge Parish
Iberville Parish
Livingston Parish
West Baton Rouge Parish
 
MAINE (Region I)
  Knox & Lincoln Co.s, 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
 
  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
 
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 Co, 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)
  Sunland Park, NM (New Area 1995) (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 Co, NY (Rural Transport (Marginal) - Nonattainment)
Essex County (P)
 
  Jefferson Co, 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
 
OREGON (Region X)
  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 Co, PA (Incomplete Data - Nonattainment)
Crawford County
 
  Erie, PA (Marginal - Nonattainment)
Erie County
 
  Franklin Co, PA (Incomplete Data - Nonattainment)
Franklin County
 
  Greene Co, 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 Co, PA (Incomplete Data - Nonattainment)
Juniata County
 
  Lancaster, PA (Marginal - Nonattainment)
Lancaster County
 
  Lawrence Co, PA (Incomplete Data - Nonattainment)
Lawrence County
 
  Northumberland Co, 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 Co, PA (Incomplete Data - Nonattainment)
Pike County
 
  Schuylkill Co, PA (Incomplete Data - Nonattainment)
Schuylkill County
 
  Scranton-Wilkes-Barre, PA (Marginal - Nonattainment)
Columbia County
Lackawanna County
Luzerne County
Monroe County
Wyoming County
 
  Snyder Co, PA (Incomplete Data - Nonattainment)
Snyder County
 
  Susquehanna Co, PA (Incomplete Data - Nonattainment)
Susquehanna County
 
  Warren Co, PA (Incomplete Data - Nonattainment)
Warren County
 
  Wayne Co, 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
 
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
 
VIRGINIA (Region III)
  Smyth Co, VA (White Top Mtn) (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
 
WISCONSIN (Region V)
  Milwaukee-Racine, WI (Severe-17 - Nonattainment)
Kenosha County
Milwaukee County
Ozaukee County
Racine County
Washington County
Waukesha County

Notes: (P) :

A portion of the county is located within the area and was designated nonattainment on June 14, 2005.

* : 5% classification change Sec. 181.(a)(3)

The former 1-hour ozone designations and classifications as of June 15, 2004, are being retained in subpart C of Part 81 for purposes of the anti backsliding provisions of 40 CFR 51.905. 40 CFR 51.905(c) references subpart C of part 81 for the areas affected by the anti-backsliding regulation.


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