Contact Us Search: All EPA This Area

• You are here: EPA Home
• Green Book
• 8-Hour Ozone Area/State/County Report with Classifications

8-Hour Ozone Area/State/County Report with Classifications
for Carbon Monoxide (CO), Particulate Matter-10 microns (PM-10),
1997 and 2006 Particulate Matter-2.5 microns (PM-2.5), and Previous 1-hour Ozone*

As of March 30, 2012

8-Hr Ozone classified area designations for the 1997 standard were effective on June 15, 2004. Thirteen (13) 8-Hr EAC areas were designated attainment on April 15, 2008.
1997 PM-2.5 area designations were effective on April 5, 2005. 2006 PM-2.5 area designations are effective on December 14, 2009.

On June 8, 2007, the United States Court of Appeals vacated the Subpart 1 portion of the Phase 1 Rule (Court Order). The Subpart 1 areas in the Green Book are listed as "Former Subpart 1" until reclassification of the areas is finalized. Proposed reclassifications were published on January 16, 2009 74 FR 2936.

View Notes

Classification
8-Hr Ozone Area/State/County (P = Part County)	1-Hr Ozone Nonatt.*	1-Hr Ozone Maint.*	CO Nonatt.	CO Maint.	PM-10 Nonatt.	PM-10 Maint.	2006 PM-2.5 Nonatt.	1997 PM-2.5 Nonatt.
Albany-Schenectady-Troy, NY----Nonattainment 8-Hour Ozone Category/Classification: Former Subpart 1
NEW YORK(Region II)
Albany Co	Marginal
Greene Co	Marginal
Montgomery Co	Marginal
Rensselaer Co	Marginal
Saratoga Co	Marginal
Schenectady Co	Marginal
Schoharie Co
Allegan Co, MI----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
MICHIGAN(Region V)
Allegan Co		Incomplete Data
Allentown-Bethlehem-Easton, PA----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
PENNSYLVANIA(Region III)
Carbon Co	Marginal
Lehigh Co	Marginal						Nonatt.
Northampton Co	Marginal						Nonatt.
Altoona, PA----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Blair Co	Marginal
Amador and Calaveras Cos (Central Mtn), CA----Nonattainment 8-Hour Ozone Category/Classification: Former Subpart 1
CALIFORNIA(Region IX)
Amador Co
Calaveras Co
Atlanta, GA----Nonattainment 8-Hour Ozone Category/Classification: Moderate
GEORGIA(Region IV)
Barrow Co								Nonatt.
Bartow Co								Nonatt.
Carroll Co								Nonatt.
Cherokee Co		Severe-15						Nonatt.
Clayton Co		Severe-15						Nonatt.
Cobb Co		Severe-15						Nonatt.
Coweta Co		Severe-15						Nonatt.
De Kalb Co		Severe-15						Nonatt.
Douglas Co		Severe-15						Nonatt.
Fayette Co		Severe-15						Nonatt.
Forsyth Co		Severe-15						Nonatt.
Fulton Co		Severe-15						Nonatt.
Gwinnett Co		Severe-15						Nonatt.
Hall Co								Nonatt.
Henry Co		Severe-15						Nonatt.
Newton Co								Nonatt.
Paulding Co		Severe-15						Nonatt.
Rockdale Co		Severe-15						Nonatt.
Spalding Co								Nonatt.
Walton Co								Nonatt.
Baltimore, MD----Nonattainment 8-Hour Ozone Category/Classification: Serious
MARYLAND(Region III)
Anne Arundel Co	Severe-15							Nonatt.
Baltimore (City)	Severe-15			Moderate <= 12.7ppm				Nonatt.
Baltimore Co	Severe-15							Nonatt.
Carroll Co	Severe-15							Nonatt.
Harford Co	Severe-15							Nonatt.
Howard Co	Severe-15							Nonatt.
Baton Rouge, LA----Maintenance 8-Hour Ozone Category/Classification: Moderate
LOUISIANA(Region VI)
Ascension Par	Severe-15
East Baton Rouge Par	Severe-15
Iberville Par	Severe-15
Livingston Par	Severe-15
West Baton Rouge Par	Severe-15
Beaumont-Port Arthur, TX----Maintenance 8-Hour Ozone Category/Classification: Moderate
TEXAS(Region VI)
Hardin Co	Serious
Jefferson Co	Serious
Orange Co	Serious
Benton Harbor, MI----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
MICHIGAN(Region V)
Berrien Co
Benzie Co, MI----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Benzie Co
Birmingham, AL----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
ALABAMA(Region IV)
Jefferson Co		Marginal					Nonatt.	Nonatt.
Shelby Co		Marginal					Nonatt.	Nonatt.
Boston-Lawrence-Worcester (E. MA), MA----Nonattainment 8-Hour Ozone Category/Classification: Moderate
MASSACHUSETTS(Region I)
Barnstable Co	Serious
Bristol Co	Serious
Dukes Co	Serious
Essex Co	Serious
Middlesex Co	Serious			Moderate <= 12.7ppm
Nantucket Co	Serious
Norfolk Co	Serious			Moderate <= 12.7ppm
Plymouth Co	Serious
Suffolk Co	Serious			Moderate <= 12.7ppm
Worcester Co	Serious			Not Classified
Boston-Manchester-Portsmouth(SE),NH----Nonattainment 8-Hour Ozone Category/Classification: Moderate
NEW HAMPSHIRE(Region I)
Hillsborough Co (P)	Serious			Not Classified
Merrimack Co (P)	Marginal
Rockingham Co (P)	Serious
Strafford Co (P)	Serious
Buffalo-Niagara Falls, NY----Nonattainment 8-Hour Ozone Category/Classification: Former Subpart 1
NEW YORK(Region II)
Erie Co	Marginal
Niagara Co	Marginal
Canton-Massillon, OH----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
OHIO(Region V)
Stark Co		Marginal					Nonatt.	Nonatt.
Cass Co, MI----Maintenance 8-Hour Ozone Category/Classification: Marginal
MICHIGAN(Region V)
Cass Co
Charleston, WV----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
WEST VIRGINIA(Region III)
Kanawha Co		Moderate					Nonatt.	Nonatt.
Putnam Co		Moderate					Nonatt.	Nonatt.
Charlotte-Gastonia-Rock Hill, NC-SC----Nonattainment 8-Hour Ozone Category/Classification: Moderate
NORTH CAROLINA(Region IV)
Cabarrus Co
Gaston Co		Moderate
Iredell Co (P)
Lincoln Co
Mecklenburg Co		Moderate		Not Classified
Rowan Co
Union Co
SOUTH CAROLINA(Region IV)
York Co (P)
Chicago-Gary-Lake County, IL-IN (IL portion)----Nonattainment 8-Hour Ozone Category/Classification: Moderate
ILLINOIS(Region V)
Cook Co	Severe-17					Moderate		Nonatt.
Du Page Co	Severe-17							Nonatt.
Grundy Co (P)	Severe-17							Nonatt.
Kane Co	Severe-17							Nonatt.
Kendall Co (P)	Severe-17							Nonatt.
Lake Co	Severe-17							Nonatt.
Mc Henry Co	Severe-17							Nonatt.
Will Co	Severe-17							Nonatt.
Chicago-Gary-Lake County, IL-IN (IN portion)----Redesignated but Split Area** 8-Hour Ozone Category/Classification: Moderate
INDIANA(Region V)
Lake Co	Severe-17			Not Classified		Moderate
Porter Co	Severe-17
Chico, CA----Nonattainment 8-Hour Ozone Category/Classification: Former Subpart 1
CALIFORNIA(Region IX)
Butte Co	Section 185A			Moderate <= 12.7ppm			Nonatt.
Cincinnati-Hamilton, OH-KY-IN----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
INDIANA(Region V)
Dearborn Co (P)
KENTUCKY(Region IV)
Boone Co		Moderate
Campbell Co		Moderate
Kenton Co		Moderate
OHIO(Region V)
Butler Co		Moderate
Clermont Co		Moderate
Clinton Co		Section 185A
Hamilton Co		Moderate
Warren Co		Moderate
Clarksville-Hopkinsville, TN-KY----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
KENTUCKY(Region IV)
Christian Co
TENNESSEE(Region IV)
Montgomery Co
Clearfield and Indiana Cos, PA----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
PENNSYLVANIA(Region III)
Clearfield Co
Indiana Co							Nonatt.	Nonatt.
Cleveland-Akron-Lorain, OH----Maintenance 8-Hour Ozone Category/Classification: Moderate
OHIO(Region V)
Ashtabula Co		Moderate						Nonatt.
Cuyahoga Co		Moderate		Moderate <= 12.7ppm		Moderate	Nonatt.	Nonatt.
Geauga Co		Moderate
Lake Co		Moderate					Nonatt.	Nonatt.
Lorain Co		Moderate					Nonatt.	Nonatt.
Medina Co		Moderate					Nonatt.	Nonatt.
Portage Co		Moderate					Nonatt.	Nonatt.
Summit Co		Moderate					Nonatt.	Nonatt.
Columbus, OH----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Delaware Co		Marginal						Nonatt.
Fairfield Co								Nonatt.
Franklin Co		Marginal						Nonatt.
Knox Co
Licking Co		Marginal						Nonatt.
Madison Co
Dallas-Fort Worth, TX----Nonattainment 8-Hour Ozone Category/Classification: Serious
TEXAS(Region VI)
Collin Co	Serious
Dallas Co	Serious
Denton Co	Serious
Ellis Co
Johnson Co
Kaufman Co
Parker Co
Rockwall Co
Tarrant Co	Serious
Dayton-Springfield, OH----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
OHIO(Region V)
Clark Co		Moderate						Nonatt.
Greene Co		Moderate						Nonatt.
Miami Co		Moderate
Montgomery Co		Moderate						Nonatt.
Denver-Boulder-Greeley-Ft Collins-Love., CO----Nonattainment 8-Hour Ozone Category/Classification: Former Subpart 1
COLORADO(Region VIII)
Adams Co		Section 185A		Serious		Moderate
Arapahoe Co		Section 185A		Serious		Moderate
Boulder Co		Section 185A		Serious		Moderate
Broomfield Co		Section 185A		Serious		Moderate
Denver Co		Section 185A		Serious		Moderate
Douglas Co		Section 185A		Serious		Moderate
Jefferson Co		Section 185A		Serious		Moderate
Larimer Co (P)				Moderate <= 12.7ppm
Weld Co (P)				Moderate <= 12.7ppm
Detroit-Ann Arbor, MI----Maintenance 8-Hour Ozone Category/Classification: Marginal
MICHIGAN(Region V)
Lenawee Co
Livingston Co		Moderate					Nonatt.	Nonatt.
Macomb Co		Moderate		Not Classified			Nonatt.	Nonatt.
Monroe Co		Moderate					Nonatt.	Nonatt.
Oakland Co		Moderate		Not Classified			Nonatt.	Nonatt.
St Clair Co		Moderate					Nonatt.	Nonatt.
Washtenaw Co		Moderate					Nonatt.	Nonatt.
Wayne Co		Moderate		Not Classified		Moderate	Nonatt.	Nonatt.
Door Co, WI----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
WISCONSIN(Region V)
Door Co		Rural Transport (Marginal)
Erie, PA----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
PENNSYLVANIA(Region III)
Erie Co	Marginal
Essex Co (Whiteface Mtn), NY----Nonattainment 8-Hour Ozone Category/Classification: Former Subpart 1
NEW YORK(Region II)
Essex Co (P)	Rural Transport (Marginal)
Evansville, IN----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
INDIANA(Region V)
Vanderburgh Co		Marginal
Warrick Co
Flint, MI----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
MICHIGAN(Region V)
Genesee Co		Section 185A
Lapeer Co
Fort Wayne, IN----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
INDIANA(Region V)
Allen Co
Franklin Co, PA----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
PENNSYLVANIA(Region III)
Franklin Co	Incomplete Data
Fredericksburg, VA----Maintenance 8-Hour Ozone Category/Classification: Moderate
VIRGINIA(Region III)
Fredericksburg
Spotsylvania Co
Stafford Co	Severe-15
Grand Rapids, MI----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
MICHIGAN(Region V)
Kent Co		Moderate
Ottawa Co		Moderate
Greater Connecticut, CT----Nonattainment 8-Hour Ozone Category/Classification: Moderate
CONNECTICUT(Region I)
Hartford Co	Serious			Moderate <= 12.7ppm
Litchfield Co	Severe-17			Moderate > 12.7ppm
New London Co	Serious
Tolland Co	Serious			Moderate <= 12.7ppm
Windham Co	Serious
Greene Co, IN----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
INDIANA(Region V)
Greene Co
Greene Co, PA----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
PENNSYLVANIA(Region III)
Greene Co	Incomplete Data						Nonatt.	Nonatt.
Hancock, Knox, Lincoln & Waldo Cos, ME----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
MAINE(Region I)
Hancock Co (P)		Marginal
Knox Co (P)	Moderate
Lincoln Co (P)	Moderate
Waldo Co (P)		Marginal
Harrisburg-Lebanon-Carlisle, PA----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
PENNSYLVANIA(Region III)
Cumberland Co	Marginal						Nonatt.	Nonatt.
Dauphin Co	Marginal						Nonatt.	Nonatt.
Lebanon Co	Marginal						Nonatt.	Nonatt.
Perry Co	Marginal
Haywood and Swain Cos (Great Smoky NP), NC----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
NORTH CAROLINA(Region IV)
Haywood Co (P)
Swain Co (P)
Houston-Galveston-Brazoria, TX----Nonattainment 8-Hour Ozone Category/Classification: Severe 15
TEXAS(Region VI)
Brazoria Co	Severe-17
Chambers Co	Severe-17
Fort Bend Co	Severe-17
Galveston Co	Severe-17
Harris Co	Severe-17
Liberty Co	Severe-17
Montgomery Co	Severe-17
Waller Co	Severe-17
Huntington-Ashland, WV-KY----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
KENTUCKY(Region IV)
Boyd Co		Moderate						Nonatt.
WEST VIRGINIA(Region III)
Cabell Co		Moderate						Nonatt.
Wayne Co		Moderate						Nonatt.
Huron Co, MI----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
MICHIGAN(Region V)
Huron Co
Imperial Co, CA----Nonattainment 8-Hour Ozone Category/Classification: Moderate
CALIFORNIA(Region IX)
Imperial Co	Section 185A				Serious		Nonatt.
Indianapolis, IN----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
INDIANA(Region V)
Boone Co
Hamilton Co								Nonatt.
Hancock Co
Hendricks Co								Nonatt.
Johnson Co								Nonatt.
Madison Co
Marion Co		Marginal		Not Classified				Nonatt.
Morgan Co								Nonatt.
Shelby Co
Jackson Co, IN----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Jackson Co
Jamestown, NY----Nonattainment 8-Hour Ozone Category/Classification: Former Subpart 1
NEW YORK(Region II)
Chautauqua Co
Jefferson Co, NY----Nonattainment 8-Hour Ozone Category/Classification: Moderate
Jefferson Co	Marginal
Johnstown, PA----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
PENNSYLVANIA(Region III)
Cambria Co	Marginal						Nonatt.	Nonatt.
Kalamazoo-Battle Creek, MI----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
MICHIGAN(Region V)
Calhoun Co
Kalamazoo Co
Van Buren Co
Kent and Queen Anne's Cos, MD----Maintenance 8-Hour Ozone Category/Classification: Marginal
MARYLAND(Region III)
Kent Co		Marginal
Queen Annes Co		Marginal
Kern Co (Eastern Kern), CA----Nonattainment 8-Hour Ozone Category/Classification: Former Subpart 1
CALIFORNIA(Region IX)
Kern Co (P)		Serious		Not Classified	Serious	Serious	Nonatt.	Nonatt.
Kewaunee Co, WI----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
WISCONSIN(Region V)
Kewaunee Co		Moderate
Knoxville, TN----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
TENNESSEE(Region IV)
Anderson Co							Nonatt.	Nonatt.
Blount Co							Nonatt.	Nonatt.
Cocke Co (P)
Jefferson Co
Knox Co		Marginal					Nonatt.	Nonatt.
Loudon Co							Nonatt.	Nonatt.
Sevier Co
La Porte, IN----Maintenance 8-Hour Ozone Category/Classification: Marginal
INDIANA(Region V)
La Porte Co
Lancaster, PA----Maintenance 8-Hour Ozone Category/Classification: Marginal
PENNSYLVANIA(Region III)
Lancaster Co	Marginal						Nonatt.	Nonatt.
Lansing-East Lansing, MI----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
MICHIGAN(Region V)
Clinton Co
Eaton Co
Ingham Co
Las Vegas, NV----Nonattainment 8-Hour Ozone Category/Classification: Former Subpart 1
NEVADA(Region IX)
Clark Co (P)				Serious	Serious
Lima, OH----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
OHIO(Region V)
Allen Co
Los Angeles South Coast Air Basin, CA----Nonattainment 8-Hour Ozone Category/Classification: Extreme
CALIFORNIA(Region IX)
Los Angeles Co (P)	Extreme			Serious	Serious		Nonatt.	Nonatt.
Orange Co	Extreme			Serious	Serious		Nonatt.	Nonatt.
Riverside Co (P)	Extreme			Serious	Serious		Nonatt.	Nonatt.
San Bernardino Co (P)	Extreme			Serious	Serious		Nonatt.	Nonatt.
Los Angeles-San Bernardino Cos(W Mojave),CA----Nonattainment 8-Hour Ozone Category/Classification: Moderate
Los Angeles Co (P)	Severe-17			Serious	Serious		Nonatt.	Nonatt.
San Bernardino Co (P)	Severe-17			Serious	Serious		Nonatt.	Nonatt.
Louisville, KY-IN----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
INDIANA(Region V)
Clark Co		Moderate						Nonatt.
Floyd Co		Moderate						Nonatt.
KENTUCKY(Region IV)
Bullitt Co		Moderate						Nonatt.
Jefferson Co		Moderate						Nonatt.
Oldham Co		Moderate
Macon, GA----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
GEORGIA(Region IV)
Bibb Co								Nonatt.
Monroe Co (P)								Nonatt.
Madison and Page Cos (Shenandoah NP), VA----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
VIRGINIA(Region III)
Madison Co (P)
Page Co (P)
Manitowoc Co, WI----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
WISCONSIN(Region V)
Manitowoc Co		Moderate
Mariposa and Tuolumne Cos (Southern Mtn),CA----Nonattainment 8-Hour Ozone Category/Classification: Former Subpart 1
CALIFORNIA(Region IX)
Mariposa Co
Tuolumne Co
Mason Co, MI----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
MICHIGAN(Region V)
Mason Co
Memphis, TN-AR----Maintenance 8-Hour Ozone Category/Classification: Moderate
ARKANSAS(Region VI)
Crittenden Co
TENNESSEE(Region IV)
Shelby Co		Marginal		Moderate <= 12.7ppm
Milwaukee-Racine, WI----Nonattainment 8-Hour Ozone Category/Classification: Moderate
WISCONSIN(Region V)
Kenosha Co	Severe-17
Milwaukee Co	Severe-17						Nonatt.
Ozaukee Co	Severe-17
Racine Co	Severe-17						Nonatt.
Washington Co	Severe-17
Waukesha Co	Severe-17						Nonatt.
Muncie, IN----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
INDIANA(Region V)
Delaware Co
Murray Co (Chattahoochee Nat Forest), GA----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
GEORGIA(Region IV)
Murray Co (P)
Muskegon, MI----Maintenance 8-Hour Ozone Category/Classification: Marginal
MICHIGAN(Region V)
Muskegon Co		Moderate
Nevada Co. (Western Part), CA----Nonattainment 8-Hour Ozone Category/Classification: Former Subpart 1
CALIFORNIA(Region IX)
Nevada Co (P)
New York-N. New Jersey-Long Island,NY-NJ-CT----Nonattainment 8-Hour Ozone Category/Classification: Moderate
CONNECTICUT(Region I)
Fairfield Co	Severe-17			Moderate > 12.7ppm			Nonatt.	Nonatt.
Middlesex Co	Serious			Moderate <= 12.7ppm
New Haven Co	Serious			Not Classified		Moderate	Nonatt.	Nonatt.
NEW JERSEY(Region II)
Bergen Co	Severe-17			Moderate > 12.7ppm			Nonatt.	Nonatt.
Essex Co	Severe-17			Moderate > 12.7ppm			Nonatt.	Nonatt.
Hudson Co	Severe-17			Moderate > 12.7ppm			Nonatt.	Nonatt.
Hunterdon Co	Severe-17
Middlesex Co	Severe-17			Not Classified			Nonatt.	Nonatt.
Monmouth Co	Severe-17			Not Classified			Nonatt.	Nonatt.
Morris Co	Severe-17			Not Classified			Nonatt.	Nonatt.
Passaic Co	Severe-17			Moderate > 12.7ppm			Nonatt.	Nonatt.
Somerset Co	Severe-17			Not Classified			Nonatt.	Nonatt.
Sussex Co	Severe-17
Union Co	Severe-17			Moderate > 12.7ppm			Nonatt.	Nonatt.
Warren Co	Marginal
NEW YORK(Region II)
Bronx Co	Severe-17			Moderate > 12.7ppm			Nonatt.	Nonatt.
Kings Co	Severe-17			Moderate > 12.7ppm			Nonatt.	Nonatt.
Nassau Co	Severe-17			Moderate > 12.7ppm			Nonatt.	Nonatt.
New York Co	Severe-17			Moderate > 12.7ppm	Moderate		Nonatt.	Nonatt.
Queens Co	Severe-17			Moderate > 12.7ppm			Nonatt.	Nonatt.
Richmond Co	Severe-17			Moderate > 12.7ppm			Nonatt.	Nonatt.
Rockland Co	Severe-17						Nonatt.	Nonatt.
Suffolk Co	Severe-17						Nonatt.	Nonatt.
Westchester Co	Severe-17			Moderate > 12.7ppm			Nonatt.	Nonatt.
Norfolk-Virginia Beach-Newport News (HR),VA----Maintenance 8-Hour Ozone Category/Classification: Marginal
VIRGINIA(Region III)
Chesapeake		Marginal
Gloucester Co
Hampton		Marginal
Isle Of Wight Co
James City Co		Marginal
Newport News		Marginal
Norfolk		Marginal
Poquoson		Marginal
Portsmouth		Marginal
Suffolk		Marginal
Virginia Beach		Marginal
Williamsburg		Marginal
York Co		Marginal
Parkersburg-Marietta, WV-OH----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
OHIO(Region V)
Washington Co								Nonatt.
WEST VIRGINIA(Region III)
Wood Co		Moderate						Nonatt.
Philadelphia-Wilmin-Atlantic Ci,PA-NJ-MD-DE----Nonattainment 8-Hour Ozone Category/Classification: Moderate
DELAWARE(Region III)
Kent Co	Severe-15
New Castle Co	Severe-15						Nonatt.	Nonatt.
Sussex Co	Marginal
MARYLAND(Region III)
Cecil Co	Severe-15
NEW JERSEY(Region II)
Atlantic Co	Moderate			Not Classified
Burlington Co	Severe-15			Not Classified			Nonatt.	Nonatt.
Camden Co	Severe-15			Moderate <= 12.7ppm			Nonatt.	Nonatt.
Cape May Co	Moderate
Cumberland Co	Severe-15
Gloucester Co	Severe-15						Nonatt.	Nonatt.
Mercer Co	Severe-15			Not Classified			Nonatt.	Nonatt.
Ocean Co	Severe-17			Not Classified
Salem Co	Severe-15			Not Classified
PENNSYLVANIA(Region III)
Bucks Co	Severe-15						Nonatt.	Nonatt.
Chester Co	Severe-15						Nonatt.	Nonatt.
Delaware Co	Severe-15						Nonatt.	Nonatt.
Montgomery Co	Severe-15						Nonatt.	Nonatt.
Philadelphia Co	Severe-15			Moderate <= 12.7ppm			Nonatt.	Nonatt.
Phoenix-Mesa, AZ----Nonattainment 8-Hour Ozone Category/Classification: Former Subpart 1
ARIZONA(Region IX)
Maricopa Co (P)		Serious		Serious	Serious
Pinal Co (P)					Serious		Nonatt.
Pittsburgh-Beaver Valley, PA----Nonattainment 8-Hour Ozone Category/Classification: Former Subpart 1
PENNSYLVANIA(Region III)
Allegheny Co		Moderate		Not Classified		Moderate	Nonatt.	Nonatt.
Armstrong Co		Moderate					Nonatt.	Nonatt.
Beaver Co		Moderate					Nonatt.	Nonatt.
Butler Co		Moderate					Nonatt.	Nonatt.
Fayette Co		Moderate
Washington Co		Moderate					Nonatt.	Nonatt.
Westmoreland Co		Moderate					Nonatt.	Nonatt.
Portland, ME----Maintenance 8-Hour Ozone Category/Classification: Marginal
MAINE(Region I)
Androscoggin Co (P)	Moderate
Cumberland Co (P)	Moderate
Sagadahoc Co	Moderate
York Co (P)	Moderate
Poughkeepsie, NY----Nonattainment 8-Hour Ozone Category/Classification: Moderate
NEW YORK(Region II)
Dutchess Co	Moderate
Orange Co	Severe-17						Nonatt.	Nonatt.
Putnam Co	Moderate
Providence (All RI), RI----Nonattainment 8-Hour Ozone Category/Classification: Moderate
RHODE ISLAND(Region I)
Bristol Co	Serious
Kent Co	Serious
Newport Co	Serious
Providence Co	Serious
Washington Co	Serious
Raleigh-Durham-Chapel Hill, NC----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
NORTH CAROLINA(Region IV)
Chatham Co (P)
Durham Co		Moderate		Moderate <= 12.7ppm
Franklin Co
Granville Co		Moderate
Johnston Co
Orange Co
Person Co
Wake Co		Moderate		Moderate <= 12.7ppm
Reading, PA----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
PENNSYLVANIA(Region III)
Berks Co		Moderate						Nonatt.
Richmond-Petersburg, VA----Maintenance 8-Hour Ozone Category/Classification: Marginal
VIRGINIA(Region III)
Charles City Co		Moderate
Chesterfield Co		Moderate
Colonial Heights		Moderate
Hanover Co		Moderate
Henrico Co		Moderate
Hopewell		Moderate
Petersburg
Prince George Co
Richmond		Moderate
Riverside Co, (Coachella Valley), CA----Nonattainment 8-Hour Ozone Category/Classification: Severe 15
CALIFORNIA(Region IX)
Riverside Co (P)	Severe-17			Serious	Serious		Nonatt.	Nonatt.
Rochester, NY----Nonattainment 8-Hour Ozone Category/Classification: Former Subpart 1
NEW YORK(Region II)
Genesee Co
Livingston Co
Monroe Co
Ontario Co
Orleans Co
Wayne Co
Rocky Mount, NC----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
NORTH CAROLINA(Region IV)
Edgecombe Co
Nash Co
Sacramento Metro, CA----Nonattainment 8-Hour Ozone Category/Classification: Severe 15
CALIFORNIA(Region IX)
El Dorado Co (P)	Severe-15			Moderate <= 12.7ppm			Nonatt.
Placer Co (P)	Severe-15			Moderate <= 12.7ppm			Nonatt.
Sacramento Co	Severe-15			Moderate <= 12.7ppm	Moderate		Nonatt.
Solano Co (P)	Severe-15			Moderate <= 12.7ppm			Nonatt.
Sutter Co (P)	Severe-15						Nonatt.
Yolo Co	Severe-15			Moderate <= 12.7ppm			Nonatt.
San Diego, CA----Nonattainment 8-Hour Ozone Category/Classification: Former Subpart 1
San Diego Co (P)		Serious		Moderate <= 12.7ppm
San Francisco Bay Area, CA----Nonattainment 8-Hour Ozone Category/Classification: Marginal
Alameda Co	Other			Moderate <= 12.7ppm			Nonatt.
Contra Costa Co	Other			Moderate <= 12.7ppm			Nonatt.
Marin Co	Other			Moderate <= 12.7ppm			Nonatt.
Napa Co	Other			Moderate <= 12.7ppm			Nonatt.
San Francisco Co	Other			Moderate <= 12.7ppm			Nonatt.
San Mateo Co	Other			Moderate <= 12.7ppm			Nonatt.
Santa Clara Co	Other			Moderate <= 12.7ppm			Nonatt.
Solano Co (P)	Other			Moderate <= 12.7ppm			Nonatt.
Sonoma Co (P)	Other			Moderate <= 12.7ppm			Nonatt.
San Joaquin Valley, CA----Nonattainment 8-Hour Ozone Category/Classification: Extreme
Fresno Co	Extreme			Moderate > 12.7ppm		Serious	Nonatt.	Nonatt.
Kern Co (P)	Extreme			Not Classified	Serious	Serious	Nonatt.	Nonatt.
Kings Co	Extreme					Serious	Nonatt.	Nonatt.
Madera Co	Extreme					Serious	Nonatt.	Nonatt.
Merced Co	Extreme					Serious	Nonatt.	Nonatt.
San Joaquin Co	Extreme			Moderate <= 12.7ppm		Serious	Nonatt.	Nonatt.
Stanislaus Co	Extreme			Moderate <= 12.7ppm		Serious	Nonatt.	Nonatt.
Tulare Co	Extreme					Serious	Nonatt.	Nonatt.
Scranton-Wilkes-Barre, PA----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
PENNSYLVANIA(Region III)
Lackawanna Co	Marginal
Luzerne Co	Marginal
Monroe Co	Marginal
Wyoming Co	Marginal
Sheboygan, WI----Nonattainment 8-Hour Ozone Category/Classification: Moderate
WISCONSIN(Region V)
Sheboygan Co		Moderate
South Bend-Elkhart, IN----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
INDIANA(Region V)
Elkhart Co		Marginal
St Joseph Co		Marginal
Springfield (Western MA), MA----Nonattainment 8-Hour Ozone Category/Classification: Moderate
MASSACHUSETTS(Region I)
Berkshire Co	Serious
Franklin Co	Serious
Hampden Co	Serious			Not Classified
Hampshire Co	Serious
St Louis, MO-IL----Nonattainment 8-Hour Ozone Category/Classification: Moderate
ILLINOIS(Region V)
Jersey Co		Marginal
Madison Co		Serious				Moderate		Nonatt.
Monroe Co		Serious						Nonatt.
St Clair Co		Serious						Nonatt.
MISSOURI(Region VII)
Franklin Co		Serious						Nonatt.
Jefferson Co		Serious						Nonatt.
St Charles Co		Serious						Nonatt.
St Louis		Serious		Not Classified				Nonatt.
St Louis Co		Serious		Not Classified				Nonatt.
State College, PA----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
PENNSYLVANIA(Region III)
Centre Co
Steubenville-Weirton, OH-WV----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
OHIO(Region V)
Jefferson Co		Section 185A				Moderate	Nonatt.	Nonatt.
WEST VIRGINIA(Region III)
Brooke Co						Moderate	Nonatt.	Nonatt.
Hancock Co						Moderate	Nonatt.	Nonatt.
Sutter Co (Sutter Buttes), CA----Nonattainment 8-Hour Ozone Category/Classification: Former Subpart 1
CALIFORNIA(Region IX)
Sutter Co (P)	Section 185A						Nonatt.
Terre Haute, IN----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
INDIANA(Region V)
Vigo Co
Tioga Co, PA----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
PENNSYLVANIA(Region III)
Tioga Co
Toledo, OH----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
OHIO(Region V)
Lucas Co		Moderate
Wood Co		Moderate
Ventura Co, CA----Nonattainment 8-Hour Ozone Category/Classification: Serious
CALIFORNIA(Region IX)
Ventura Co (P)	Severe-15
Washington, DC-MD-VA----Nonattainment 8-Hour Ozone Category/Classification: Moderate
DISTRICT OF COLUMBIA(Region III)
Entire District	Severe-15			Moderate <= 12.7ppm				Nonatt.
MARYLAND(Region III)
Calvert Co	Severe-15
Charles Co	Severe-15							Nonatt.
Frederick Co	Severe-15							Nonatt.
Montgomery Co	Severe-15			Moderate <= 12.7ppm				Nonatt.
Prince George's Co	Severe-15			Moderate <= 12.7ppm				Nonatt.
VIRGINIA(Region III)
Alexandria	Severe-15			Moderate <= 12.7ppm				Nonatt.
Arlington Co	Severe-15			Moderate <= 12.7ppm				Nonatt.
Fairfax	Severe-15							Nonatt.
Fairfax Co	Severe-15							Nonatt.
Falls Church	Severe-15							Nonatt.
Loudoun Co	Severe-15							Nonatt.
Manassas	Severe-15							Nonatt.
Manassas Park	Severe-15							Nonatt.
Prince William Co	Severe-15							Nonatt.
Wheeling, WV-OH----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
OHIO(Region V)
Belmont Co								Nonatt.
WEST VIRGINIA(Region III)
Marshall Co								Nonatt.
Ohio Co								Nonatt.
York, PA----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
PENNSYLVANIA(Region III)
Adams Co	Marginal
York Co	Marginal						Nonatt.	Nonatt.
Youngstown-Warren-Sharon, OH-PA----Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
OHIO(Region V)
Columbiana Co		Incomplete Data
Mahoning Co		Marginal
Trumbull Co		Marginal
PENNSYLVANIA(Region III)
Mercer Co	Marginal

View Notes

* Details about the designations and classifications of previous 1-hour ozone nonattainment and maintenance areas can be found here.

** 'Redesignated but Split Area' refers to a multi-state area where all of the area's states have not been redesignated. The area will not become a maintenance area until all states are redesignated.

Go Top

• EPA Home
• Privacy and Security Notice
• Contact Us