Technology Transfer Network / NAAQS
Ozone Implementation
Area/State/County Report
Ozone Nonattainment Areas Which Were Revoked Without Maintenance Plans
Note: EPA no longer updates this information, but it may be useful as a reference or resource.Albany-Schenectady-Troy, NY (Marginal) NEW YORK (Region II) Albany Co Greene Co Montgomery Co Rensselaer Co Saratoga Co Schenectady Co Allegan Co, MI (Incomplete Data) MICHIGAN (Region V) Allegan Co Allentown-Bethlehem-Easton, PA-NJ (Marginal) NEW JERSEY (Region II) Warren Co PENNSYLVANIA (Region III) Carbon Co Lehigh Co Northampton Co Altoona, PA (Marginal) PENNSYLVANIA (Region III) Blair Co Atlantic City, NJ (Moderate) NEW JERSEY (Region II) Atlantic Co Cape May Co Boston-Lawrence-Worcester (E. MA), MA-NH (Serious) MASSACHUSETTS (Region I) Barnstable Co Bristol Co Dukes Co Essex Co Middlesex Co Nantucket Co Norfolk Co Plymouth Co Suffolk Co Worcester Co NEW HAMPSHIRE (Region I) Hillsborough Co (P) Pelham town Amherst town Brookline town Hollis town Hudson town Litchfield town Merrimack town Milford town Mont Vernon town Nashua city Wilton town Rockingham Co (P) Atkinson town Brentwood town Danville town Derry town E. Kingston town Hampstead town Hampton Falls town Kensington town Kingston town Londonderry town Newton town Plaistow town Salem town Sandown town Seabrook town South Hampton town Windham town Buffalo-Niagara Falls, NY (Marginal) NEW YORK (Region II) Erie Co Niagara Co Cheshire Co, NH (Incomplete Data) NEW HAMPSHIRE (Region I) Cheshire Co Chico, CA (Section 185A) CALIFORNIA (Region IX) Butte Co Crawford Co, PA (Incomplete Data) PENNSYLVANIA (Region III) Crawford Co Denver-Boulder, CO (Section 185A) COLORADO (Region VIII) Adams Co (P) West of Kiowa Creek Arapahoe Co (P) West of Kiowa Creek Boulder Co (P) Excluding Rocky Mtn. National Park Denver Co Douglas Co Jefferson Co Door Co, WI (Marginal RT) WISCONSIN (Region V) Door Co Erie, PA (Marginal) PENNSYLVANIA (Region III) Erie Co Essex Co, NY (Marginal RT) NEW YORK (Region II) Essex Co (P) The portion of Whiteface Mountain above 4,500 feet in elevation in Essex County Flint, MI (Section 185A) MICHIGAN (Region V) Genesee Co Franklin Co, PA (Incomplete Data) PENNSYLVANIA (Region III) Franklin Co Greene Co, PA (Incomplete Data) PENNSYLVANIA (Region III) Greene Co Harrisburg-Lebanon-Carlisle, PA (Marginal) PENNSYLVANIA (Region III) Cumberland Co Dauphin Co Lebanon Co Perry Co Jefferson Co, NY (Marginal*) NEW YORK (Region II) Jefferson Co Johnstown, PA (Marginal) PENNSYLVANIA (Region III) Cambria Co Somerset Co Juniata Co, PA (Incomplete Data) PENNSYLVANIA (Region III) Juniata Co Knox & Lincoln Co.s, ME (Moderate*) MAINE (Region I) Knox Co Lincoln Co Lawrence Co, PA (Incomplete Data) PENNSYLVANIA (Region III) Lawrence Co Lewiston-Auburn, ME (Moderate*) MAINE (Region I) Androscoggin Co Kennebec Co Manchester, NH (Marginal) NEW HAMPSHIRE (Region I) Hillsborough Co (P) Antrim town Bedford town Bennington town Deering town Francestown town Goffstown town Greenfield town Greenville town Hancock town Hillsborough town Lyndeborough town Manchester city Mason town New Boston town New Ipswich town Peterborough town Sharon town Temple town Weare town Windsor town Merrimack Co Rockingham Co (P) Auburn town Candia town Chester town Deerfield town Epping town Fremont town Northwood town Nottingham town Raymond town Muskegon, MI (Moderate) MICHIGAN (Region V) Muskegon Co Northumberland Co, PA (Incomplete Data) PENNSYLVANIA (Region III) Northumberland Co Pike Co, PA (Incomplete Data) PENNSYLVANIA (Region III) Pike Co Portland, ME (Moderate) MAINE (Region I) Cumberland Co Sagadahoc Co York Co Portsmouth-Dover-Rochester, NH (Serious) NEW HAMPSHIRE (Region I) Rockingham Co (P) Exeter town Greenland town Hampton town New Castle town Newfields town Newington town Newmarket town North Hampton town Portsmouth city Rye town Stratham town Strafford Co Poughkeepsie, NY (Moderate-b) NEW YORK (Region II) Dutchess Co Orange Co (P) Remainder of County Putnam Co Providence (All RI), RI (Serious) RHODE ISLAND (Region I) Bristol Co Kent Co Newport Co Providence Co Washington Co Reno, NV (Marginal) NEVADA (Region IX) Washoe Co Saginaw-Bay City-Midland, MI (Incomplete Data) MICHIGAN (Region V) Bay Co Midland Co Saginaw Co Salem, OR (Incomplete Data) OREGON (Region X) Marion Co (P) Salem Area Transportation Study Polk Co (P) Salem Area Transportation Study Schuylkill Co, PA (Incomplete Data) PENNSYLVANIA (Region III) Schuylkill Co Scranton-Wilkes-Barre, PA (Marginal) PENNSYLVANIA (Region III) Columbia Co Lackawanna Co Luzerne Co Monroe Co Wyoming Co Smyth Co, VA (White Top Mtn) (Marginal RT) VIRGINIA (Region III) Smyth Co (P) The portion of White Top Mountain above 4,500 feet elevation in Smyth county Snyder Co, PA (Incomplete Data) PENNSYLVANIA (Region III) Snyder Co Susquehanna Co, PA (Incomplete Data) PENNSYLVANIA (Region III) Susquehanna Co Sussex Co, DE (Marginal) DELAWARE (Region III) Sussex Co Warren Co, PA (Incomplete Data) PENNSYLVANIA (Region III) Warren Co Wayne Co, PA (Incomplete Data) PENNSYLVANIA (Region III) Wayne Co York, PA (Marginal) PENNSYLVANIA (Region III) Adams Co York Co Youngstown-Warren-Sharon, PA portion (Marginal) PENNSYLVANIA (Region III) Mercer Co Yuba City, CA (Section 185A) CALIFORNIA (Region IX) Sutter Co (P) Northern portion Yuba Co Notes: (P) : A portion of the county is located within the area and is designated nonattainment. * : 5% classification change Sec. 181.(a)(3)