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• 8-Hour Ozone State/Area/County Report with Classifications

8-Hour Ozone State/Area/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.
ALABAMA (Region IV)
Birmingham, AL		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Jefferson Co		Marginal					Nonatt.	Nonatt.
Shelby Co		Marginal					Nonatt.	Nonatt.
ARIZONA (Region IX)
Phoenix-Mesa, AZ		Nonattainment 8-Hour Ozone Category/Classification: Former Subpart 1
Maricopa Co (P)		Serious		Serious	Serious
Pinal Co (P)					Serious		Nonatt.
ARKANSAS (Region VI)
Memphis, TN-AR		Maintenance 8-Hour Ozone Category/Classification: Moderate
Crittenden Co
CALIFORNIA (Region IX)
Amador and Calaveras Cos (Central Mtn), CA		Nonattainment 8-Hour Ozone Category/Classification: Former Subpart 1
Amador Co
Calaveras Co
Chico, CA		Nonattainment 8-Hour Ozone Category/Classification: Former Subpart 1
Butte Co	Section 185A			Moderate <= 12.7ppm			Nonatt.
Imperial Co, CA		Nonattainment 8-Hour Ozone Category/Classification: Moderate
Imperial Co	Section 185A				Serious		Nonatt.
Kern Co (Eastern Kern), CA		Nonattainment 8-Hour Ozone Category/Classification: Former Subpart 1
Kern Co (P)		Serious		Not Classified	Serious	Serious	Nonatt.	Nonatt.
Los Angeles South Coast Air Basin, CA		Nonattainment 8-Hour Ozone Category/Classification: Extreme
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.
Mariposa and Tuolumne Cos (Southern Mtn),CA		Nonattainment 8-Hour Ozone Category/Classification: Former Subpart 1
Mariposa Co
Tuolumne Co
Nevada Co. (Western Part), CA		Nonattainment 8-Hour Ozone Category/Classification: Former Subpart 1
Nevada Co (P)
Riverside Co, (Coachella Valley), CA		Nonattainment 8-Hour Ozone Category/Classification: Severe 15
Riverside Co (P)	Severe-17			Serious	Serious		Nonatt.	Nonatt.
Sacramento Metro, CA		Nonattainment 8-Hour Ozone Category/Classification: Severe 15
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.
Sutter Co (Sutter Buttes), CA		Nonattainment 8-Hour Ozone Category/Classification: Former Subpart 1
Sutter Co (P)	Section 185A						Nonatt.
Ventura Co, CA		Nonattainment 8-Hour Ozone Category/Classification: Serious
Ventura Co (P)	Severe-15
COLORADO (Region VIII)
Denver-Boulder-Greeley-Ft Collins-Love., CO		Nonattainment 8-Hour Ozone Category/Classification: Former Subpart 1
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
CONNECTICUT (Region I)
Greater Connecticut, CT		Nonattainment 8-Hour Ozone Category/Classification: Moderate
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
New York-N. New Jersey-Long Island,NY-NJ-CT		Nonattainment 8-Hour Ozone Category/Classification: Moderate
Fairfield Co	Severe-17			Moderate > 12.7ppm			Nonatt.	Nonatt.
Middlesex Co	Serious			Moderate <= 12.7ppm
New Haven Co	Serious			Not Classified		Moderate	Nonatt.	Nonatt.
DELAWARE (Region III)
Philadelphia-Wilmin-Atlantic Ci,PA-NJ-MD-DE		Nonattainment 8-Hour Ozone Category/Classification: Moderate
Kent Co	Severe-15
New Castle Co	Severe-15						Nonatt.	Nonatt.
Sussex Co	Marginal
DISTRICT OF COLUMBIA (Region III)
Washington, DC-MD-VA		Nonattainment 8-Hour Ozone Category/Classification: Moderate
Entire District	Severe-15			Moderate <= 12.7ppm				Nonatt.
GEORGIA (Region IV)
Atlanta, GA		Nonattainment 8-Hour Ozone Category/Classification: Moderate
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.
Macon, GA		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Bibb Co								Nonatt.
Monroe Co (P)								Nonatt.
Murray Co (Chattahoochee Nat Forest), GA		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Murray Co (P)
ILLINOIS (Region V)
Chicago-Gary-Lake County, IL-IN (IL portion)		Nonattainment 8-Hour Ozone Category/Classification: Moderate
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.
St Louis, MO-IL		Nonattainment 8-Hour Ozone Category/Classification: Moderate
Jersey Co		Marginal
Madison Co		Serious				Moderate		Nonatt.
Monroe Co		Serious						Nonatt.
St Clair Co		Serious						Nonatt.
INDIANA (Region V)
Chicago-Gary-Lake County, IL-IN (IN portion)		Redesignated but Split Area** 8-Hour Ozone Category/Classification: Moderate
Lake Co	Severe-17			Not Classified		Moderate
Porter Co	Severe-17
Cincinnati-Hamilton, OH-KY-IN		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Dearborn Co (P)
Evansville, IN		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Vanderburgh Co		Marginal
Warrick Co
Fort Wayne, IN		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Allen Co
Greene Co, IN		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Greene Co
Indianapolis, IN		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
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
La Porte, IN		Maintenance 8-Hour Ozone Category/Classification: Marginal
La Porte Co
Louisville, KY-IN		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Clark Co		Moderate						Nonatt.
Floyd Co		Moderate						Nonatt.
Muncie, IN		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Delaware Co
South Bend-Elkhart, IN		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Elkhart Co		Marginal
St Joseph Co		Marginal
Terre Haute, IN		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Vigo Co
KENTUCKY (Region IV)
Cincinnati-Hamilton, OH-KY-IN		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Boone Co		Moderate
Campbell Co		Moderate
Kenton Co		Moderate
Clarksville-Hopkinsville, TN-KY		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Christian Co
Huntington-Ashland, WV-KY		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Boyd Co		Moderate						Nonatt.
Louisville, KY-IN		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Bullitt Co		Moderate						Nonatt.
Jefferson Co		Moderate						Nonatt.
Oldham Co		Moderate
LOUISIANA (Region VI)
Baton Rouge, LA		Maintenance 8-Hour Ozone Category/Classification: Moderate
Ascension Par	Severe-15
East Baton Rouge Par	Severe-15
Iberville Par	Severe-15
Livingston Par	Severe-15
West Baton Rouge Par	Severe-15
MAINE (Region I)
Hancock, Knox, Lincoln & Waldo Cos, ME		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Hancock Co (P)		Marginal
Knox Co (P)	Moderate
Lincoln Co (P)	Moderate
Waldo Co (P)		Marginal
Portland, ME		Maintenance 8-Hour Ozone Category/Classification: Marginal
Androscoggin Co (P)	Moderate
Cumberland Co (P)	Moderate
Sagadahoc Co	Moderate
York Co (P)	Moderate
MARYLAND (Region III)
Baltimore, MD		Nonattainment 8-Hour Ozone Category/Classification: Serious
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.
Kent and Queen Anne's Cos, MD		Maintenance 8-Hour Ozone Category/Classification: Marginal
Kent Co		Marginal
Queen Annes Co		Marginal
Philadelphia-Wilmin-Atlantic Ci,PA-NJ-MD-DE		Nonattainment 8-Hour Ozone Category/Classification: Moderate
Cecil Co	Severe-15
Washington, DC-MD-VA		Nonattainment 8-Hour Ozone Category/Classification: Moderate
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.
MASSACHUSETTS (Region I)
Boston-Lawrence-Worcester (E. MA), MA		Nonattainment 8-Hour Ozone Category/Classification: Moderate
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
Springfield (Western MA), MA		Nonattainment 8-Hour Ozone Category/Classification: Moderate
Berkshire Co	Serious
Franklin Co	Serious
Hampden Co	Serious			Not Classified
Hampshire Co	Serious
MICHIGAN (Region V)
Allegan Co, MI		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Allegan Co		Incomplete Data
Benton Harbor, MI		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Berrien Co
Benzie Co, MI		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Benzie Co
Cass Co, MI		Maintenance 8-Hour Ozone Category/Classification: Marginal
Cass Co
Detroit-Ann Arbor, MI		Maintenance 8-Hour Ozone Category/Classification: Marginal
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.
Flint, MI		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Genesee Co		Section 185A
Lapeer Co
Grand Rapids, MI		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Kent Co		Moderate
Ottawa Co		Moderate
Huron Co, MI		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Huron Co
Kalamazoo-Battle Creek, MI		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Calhoun Co
Kalamazoo Co
Van Buren Co
Lansing-East Lansing, MI		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Clinton Co
Eaton Co
Ingham Co
Mason Co, MI		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Mason Co
Muskegon, MI		Maintenance 8-Hour Ozone Category/Classification: Marginal
Muskegon Co		Moderate
MISSOURI (Region VII)
St Louis, MO-IL		Nonattainment 8-Hour Ozone Category/Classification: Moderate
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.
NEVADA (Region IX)
Las Vegas, NV		Nonattainment 8-Hour Ozone Category/Classification: Former Subpart 1
Clark Co (P)				Serious	Serious
NEW HAMPSHIRE (Region I)
Boston-Manchester-Portsmouth(SE),NH		Nonattainment 8-Hour Ozone Category/Classification: Moderate
Hillsborough Co (P)	Serious			Not Classified
Merrimack Co (P)	Marginal
Rockingham Co (P)	Serious
Strafford Co (P)	Serious
NEW JERSEY (Region II)
New York-N. New Jersey-Long Island,NY-NJ-CT		Nonattainment 8-Hour Ozone Category/Classification: Moderate
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
Philadelphia-Wilmin-Atlantic Ci,PA-NJ-MD-DE		Nonattainment 8-Hour Ozone Category/Classification: Moderate
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
NEW YORK (Region II)
Albany-Schenectady-Troy, NY		Nonattainment 8-Hour Ozone Category/Classification: Former Subpart 1
Albany Co	Marginal
Greene Co	Marginal
Montgomery Co	Marginal
Rensselaer Co	Marginal
Saratoga Co	Marginal
Schenectady Co	Marginal
Schoharie Co
Buffalo-Niagara Falls, NY		Nonattainment 8-Hour Ozone Category/Classification: Former Subpart 1
Erie Co	Marginal
Niagara Co	Marginal
Essex Co (Whiteface Mtn), NY		Nonattainment 8-Hour Ozone Category/Classification: Former Subpart 1
Essex Co (P)	Rural Transport (Marginal)
Jamestown, NY		Nonattainment 8-Hour Ozone Category/Classification: Former Subpart 1
Chautauqua Co
Jefferson Co, NY		Nonattainment 8-Hour Ozone Category/Classification: Moderate
Jefferson Co	Marginal
New York-N. New Jersey-Long Island,NY-NJ-CT		Nonattainment 8-Hour Ozone Category/Classification: Moderate
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.
Poughkeepsie, NY		Nonattainment 8-Hour Ozone Category/Classification: Moderate
Dutchess Co	Moderate
Orange Co	Severe-17						Nonatt.	Nonatt.
Putnam Co	Moderate
Rochester, NY		Nonattainment 8-Hour Ozone Category/Classification: Former Subpart 1
Genesee Co
Livingston Co
Monroe Co
Ontario Co
Orleans Co
Wayne Co
NORTH CAROLINA (Region IV)
Charlotte-Gastonia-Rock Hill, NC-SC		Nonattainment 8-Hour Ozone Category/Classification: Moderate
Cabarrus Co
Gaston Co		Moderate
Iredell Co (P)
Lincoln Co
Mecklenburg Co		Moderate		Not Classified
Rowan Co
Union Co
Haywood and Swain Cos (Great Smoky NP), NC		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Haywood Co (P)
Swain Co (P)
Raleigh-Durham-Chapel Hill, NC		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
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
Rocky Mount, NC		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Edgecombe Co
Nash Co
OHIO (Region V)
Canton-Massillon, OH		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Stark Co		Marginal					Nonatt.	Nonatt.
Cincinnati-Hamilton, OH-KY-IN		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Butler Co		Moderate
Clermont Co		Moderate
Clinton Co		Section 185A
Hamilton Co		Moderate
Warren Co		Moderate
Cleveland-Akron-Lorain, OH		Maintenance 8-Hour Ozone Category/Classification: Moderate
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
Dayton-Springfield, OH		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Clark Co		Moderate						Nonatt.
Greene Co		Moderate						Nonatt.
Miami Co		Moderate
Montgomery Co		Moderate						Nonatt.
Lima, OH		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Allen Co
Parkersburg-Marietta, WV-OH		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Washington Co								Nonatt.
Steubenville-Weirton, OH-WV		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Jefferson Co		Section 185A				Moderate	Nonatt.	Nonatt.
Toledo, OH		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Lucas Co		Moderate
Wood Co		Moderate
Wheeling, WV-OH		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Belmont Co								Nonatt.
Youngstown-Warren-Sharon, OH-PA		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Columbiana Co		Incomplete Data
Mahoning Co		Marginal
Trumbull Co		Marginal
PENNSYLVANIA (Region III)
Allentown-Bethlehem-Easton, PA		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
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
Clearfield and Indiana Cos, PA		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Clearfield Co
Indiana Co							Nonatt.	Nonatt.
Erie, PA		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Erie Co	Marginal
Franklin Co, PA		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Franklin Co	Incomplete Data
Greene Co, PA		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Greene Co	Incomplete Data						Nonatt.	Nonatt.
Harrisburg-Lebanon-Carlisle, PA		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Cumberland Co	Marginal						Nonatt.	Nonatt.
Dauphin Co	Marginal						Nonatt.	Nonatt.
Lebanon Co	Marginal						Nonatt.	Nonatt.
Perry Co	Marginal
Johnstown, PA		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Cambria Co	Marginal						Nonatt.	Nonatt.
Lancaster, PA		Maintenance 8-Hour Ozone Category/Classification: Marginal
Lancaster Co	Marginal						Nonatt.	Nonatt.
Philadelphia-Wilmin-Atlantic Ci,PA-NJ-MD-DE		Nonattainment 8-Hour Ozone Category/Classification: Moderate
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.
Pittsburgh-Beaver Valley, PA		Nonattainment 8-Hour Ozone Category/Classification: Former Subpart 1
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.
Reading, PA		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Berks Co		Moderate						Nonatt.
Scranton-Wilkes-Barre, PA		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Lackawanna Co	Marginal
Luzerne Co	Marginal
Monroe Co	Marginal
Wyoming Co	Marginal
State College, PA		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Centre Co
Tioga Co, PA		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Tioga Co
York, PA		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Adams Co	Marginal
York Co	Marginal						Nonatt.	Nonatt.
Youngstown-Warren-Sharon, OH-PA		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Mercer Co	Marginal
RHODE ISLAND (Region I)
Providence (All RI), RI		Nonattainment 8-Hour Ozone Category/Classification: Moderate
Bristol Co	Serious
Kent Co	Serious
Newport Co	Serious
Providence Co	Serious
Washington Co	Serious
SOUTH CAROLINA (Region IV)
Charlotte-Gastonia-Rock Hill, NC-SC		Nonattainment 8-Hour Ozone Category/Classification: Moderate
York Co (P)
TENNESSEE (Region IV)
Clarksville-Hopkinsville, TN-KY		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Montgomery Co
Knoxville, TN		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Anderson Co							Nonatt.	Nonatt.
Blount Co							Nonatt.	Nonatt.
Cocke Co (P)
Jefferson Co
Knox Co		Marginal					Nonatt.	Nonatt.
Loudon Co							Nonatt.	Nonatt.
Sevier Co
Memphis, TN-AR		Maintenance 8-Hour Ozone Category/Classification: Moderate
Shelby Co		Marginal		Moderate <= 12.7ppm
TEXAS (Region VI)
Beaumont-Port Arthur, TX		Maintenance 8-Hour Ozone Category/Classification: Moderate
Hardin Co	Serious
Jefferson Co	Serious
Orange Co	Serious
Dallas-Fort Worth, TX		Nonattainment 8-Hour Ozone Category/Classification: Serious
Collin Co	Serious
Dallas Co	Serious
Denton Co	Serious
Ellis Co
Johnson Co
Kaufman Co
Parker Co
Rockwall Co
Tarrant Co	Serious
Houston-Galveston-Brazoria, TX		Nonattainment 8-Hour Ozone Category/Classification: Severe 15
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
VIRGINIA (Region III)
Fredericksburg, VA		Maintenance 8-Hour Ozone Category/Classification: Moderate
Fredericksburg
Spotsylvania Co
Stafford Co	Severe-15
Madison and Page Cos (Shenandoah NP), VA		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Madison Co (P)
Page Co (P)
Norfolk-Virginia Beach-Newport News (HR),VA		Maintenance 8-Hour Ozone Category/Classification: Marginal
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
Richmond-Petersburg, VA		Maintenance 8-Hour Ozone Category/Classification: Marginal
Charles City Co		Moderate
Chesterfield Co		Moderate
Colonial Heights		Moderate
Hanover Co		Moderate
Henrico Co		Moderate
Hopewell		Moderate
Petersburg
Prince George Co
Richmond		Moderate
Washington, DC-MD-VA		Nonattainment 8-Hour Ozone Category/Classification: Moderate
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.
WEST VIRGINIA (Region III)
Charleston, WV		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Kanawha Co		Moderate					Nonatt.	Nonatt.
Putnam Co		Moderate					Nonatt.	Nonatt.
Huntington-Ashland, WV-KY		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Cabell Co		Moderate						Nonatt.
Wayne Co		Moderate						Nonatt.
Parkersburg-Marietta, WV-OH		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Wood Co		Moderate						Nonatt.
Steubenville-Weirton, OH-WV		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Brooke Co						Moderate	Nonatt.	Nonatt.
Hancock Co						Moderate	Nonatt.	Nonatt.
Wheeling, WV-OH		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Marshall Co								Nonatt.
Ohio Co								Nonatt.
WISCONSIN (Region V)
Door Co, WI		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Door Co		Rural Transport (Marginal)
Kewaunee Co, WI		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Kewaunee Co		Moderate
Manitowoc Co, WI		Maintenance 8-Hour Ozone Category/Classification: Former Subpart 1
Manitowoc Co		Moderate
Milwaukee-Racine, WI		Nonattainment 8-Hour Ozone Category/Classification: Moderate
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.
Sheboygan, WI		Nonattainment 8-Hour Ozone Category/Classification: Moderate
Sheboygan Co		Moderate

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.

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