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1-Hour Ozone (1979) Designated Area/State Information - NAAQS Revoked

Data is current as of August 31, 2020

Display:       Nonattainment and Maintenance Areas       Nonattainment Areas       Maintenance Areas
Area Name  State  Current Status  class sort Current
Classification
or at
Redesignation
 
No.
Counties
 
2000
Population
 
EPA
Region
 
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click area name for state/county list
click for
Classification history
 
Total
Areas

Total
Counties
Total
Population
(2000)
 
Nonattainment 63 219 103,431,708  
Maintenance 73 191 62,150,220  
Nonattainment and Maintenance 136 409 165,581,928  
Albany-Schenectady-Troy, NY NY Nonattainment G Marginal 6 892,196 02
Allegan Co, MI MI Maintenance K Incomplete Data 1 105,665 05
Allentown-Bethlehem-Easton, PA-NJ NJ Nonattainment G Marginal 1 102,437 02
Allentown-Bethlehem-Easton, PA-NJ PA Nonattainment G Marginal 3 637,958 03
Altoona, PA PA Nonattainment G Marginal 1 129,144 03
Atlanta, GA GA Maintenance C Severe-15 13 3,698,679 04
Atlantic City, NJ NJ Nonattainment E Moderate 2 354,878 02
Baltimore, MD MD Nonattainment C Severe-15 6 2,512,431 03
Baton Rouge, LA LA Nonattainment C Severe-15 5 636,214 06
Beaumont-Port Arthur, TX TX Nonattainment D Serious 3 385,090 06
Beauregard Par, LA LA Maintenance K Incomplete Data 1 32,986 06
Birmingham, AL AL Maintenance G Marginal 2 805,340 04
Boston-Lawrence-Worcester (E. Mass), MA-NH MA Nonattainment D Serious 10 5,534,130 01
Boston-Lawrence-Worcester (E. Mass), MA-NH NH Nonattainment D Serious 2 349,352 01
Buffalo-Niagara Falls, NY NY Nonattainment G Marginal 2 1,170,111 02
Canton, OH OH Maintenance G Marginal 1 378,098 05
Charleston, WV WV Maintenance E Moderate 2 251,662 03
Charlotte-Gastonia, NC NC Maintenance E Moderate 2 885,819 04
Cherokee Co, SC SC Maintenance G Marginal 1 52,537 04
Cheshire Co, NH NH Nonattainment K Incomplete Data 1 73,825 01
Chicago-Gary-Lake County, IL-IN IL Nonattainment B Severe-17 8 8,126,446 05
Chicago-Gary-Lake County, IL-IN IN Nonattainment B Severe-17 2 631,362 05
Chico, CA CA Nonattainment J Section 185A 1 203,171 09
Cincinnati-Hamilton, OH-KY KY Maintenance E Moderate 3 326,071 04
Cincinnati-Hamilton, OH-KY OH Maintenance E Moderate 4 1,514,470 05
Cleveland-Akron-Lorain, OH OH Maintenance E Moderate 8 2,945,831 05
Clinton Co, OH OH Maintenance J Section 185A 1 40,543 05
Columbiana Co, OH OH Maintenance K Incomplete Data 1 112,075 05
Columbus, OH OH Maintenance G Marginal 3 1,324,458 05
Crawford Co, PA PA Nonattainment K Incomplete Data 1 90,366 03
Dallas-Fort Worth, TX TX Nonattainment D Serious 4 4,589,769 06
Dayton-Springfield, OH OH Maintenance E Moderate 4 950,558 05
Denver-Boulder, CO CO Maintenance J Section 185A 7 2,389,470 08
Detroit-Ann Arbor, MI MI Maintenance E Moderate 7 4,833,493 05
Door Co, WI WI Maintenance H Rural Transport (Marginal) 1 27,961 05
East Kern Co, CA CA Maintenance D Serious 1 111,425 09
Edmonson Co, KY KY Maintenance H Rural Transport (Marginal) 1 11,644 04
El Paso, TX TX Nonattainment D Serious 1 679,622 06
Erie, PA PA Nonattainment G Marginal 1 280,843 03
Essex Co, NY NY Nonattainment H Rural Transport (Marginal) 1 0 02
Evansville, IN IN Maintenance G Marginal 1 171,922 05
Flint, MI MI Maintenance J Section 185A 1 436,141 05
Franklin Co, PA PA Nonattainment K Incomplete Data 1 129,313 03
Grand Rapids, MI MI Maintenance E Moderate 2 812,649 05
Grant Par, LA LA Maintenance K Incomplete Data 1 18,698 06
Greater Connecticut, CT CT Nonattainment D Serious 8 2,532,154 01
Greenbrier, WV WV Maintenance G Marginal 1 34,453 03
Greene Co, PA PA Nonattainment K Incomplete Data 1 40,672 03
Greensboro-Winston-Salem-High Point, NC NC Maintenance E Moderate 4 874,362 04
Hancock & Waldo Cos, ME ME Maintenance G Marginal 2 88,071 01
Harrisburg-Lebanon-Carlisle, PA PA Nonattainment G Marginal 4 629,401 03
Houston-Galveston-Brazoria, TX TX Nonattainment B Severe-17 8 4,669,571 06
Huntington-Ashland, WV-KY KY Maintenance E Moderate 2 66,877 04
Huntington-Ashland, WV-KY WV Maintenance E Moderate 2 139,687 03
Imperial Co, CA CA Nonattainment J Section 185A 1 142,361 09
Indianapolis, IN IN Maintenance G Marginal 1 860,454 05
Jacksonville, FL FL Maintenance J Section 185A 1 778,879 04
Jefferson Co, NY NY Nonattainment G Marginal 1 111,738 02
Jersey Co, IL IL Maintenance G Marginal 1 21,668 05
Johnstown, PA PA Nonattainment G Marginal 2 232,621 03
Juniata Co, PA PA Nonattainment K Incomplete Data 1 22,821 03
Kansas City, MO-KS KS Maintenance F Other 2 608,968 07
Kansas City, MO-KS MO Maintenance F Other 3 912,667 07
Kent and Queen Anne's Co.s, MD MD Maintenance G Marginal 2 59,760 03
Kewaunee Co, WI WI Maintenance E Moderate 1 20,187 05
Knox & Lincoln Co.s, ME ME Nonattainment E Moderate 2 73,234 01
Knoxville, TN TN Maintenance G Marginal 1 382,032 04
Lafayette, LA LA Maintenance J Section 185A 1 190,503 06
Lafourche Par, LA LA Maintenance K Incomplete Data 1 89,974 06
Lake Charles, LA LA Maintenance G Marginal 1 183,577 06
Lancaster, PA PA Nonattainment G Marginal 1 470,658 03
Lawrence Co, PA PA Nonattainment K Incomplete Data 1 94,643 03
Lewiston-Auburn, ME ME Nonattainment E Moderate 2 220,907 01
Lexington-Fayette, KY KY Maintenance G Marginal 2 293,573 04
Los Angeles-South Coast Air Basin, CA CA Nonattainment A Extreme 4 14,593,587 09
Louisville, KY-IN IN Maintenance E Moderate 2 167,295 05
Louisville, KY-IN KY Maintenance E Moderate 3 716,054 04
Manchester, NH NH Nonattainment G Marginal 3 364,927 01
Manitowoc Co, WI WI Maintenance E Moderate 1 82,887 05
Memphis, TN TN Maintenance G Marginal 1 897,472 04
Miami-Fort Lauderdale-W. Palm Beach, FL FL Maintenance E Moderate 3 5,007,564 04
Milwaukee-Racine, WI WI Nonattainment B Severe-17 6 1,839,149 05
Monterey Bay, CA CA Maintenance E Moderate 3 710,598 09
Morongo Band of Mission Indians CA Nonattainment B Severe-17 1 0 09
Muskegon, MI MI Maintenance E Moderate 1 170,200 05
Nashville, TN TN Maintenance E Moderate 5 1,097,810 04
New Orleans, LA LA Maintenance J Section 185A 4 1,055,441 06
New York-N. New Jersey-Long Island, NY-NJ-CT CT Nonattainment B Severe-17 2 873,411 01
New York-N. New Jersey-Long Island, NY-NJ-CT NJ Nonattainment B Severe-17 12 6,208,552 02
New York-N. New Jersey-Long Island, NY-NJ-CT NY Nonattainment B Severe-17 10 12,089,343 02
Norfolk-Virginia Beach-Newport News (Hampton Roads), VA VA Maintenance G Marginal 11 1,477,636 03
Northumberland Co, PA PA Nonattainment K Incomplete Data 1 94,556 03
Owensboro, KY KY Maintenance G Marginal 2 92,389 04
Paducah, KY KY Maintenance G Marginal 2 31,404 04
Parkersburg-Marietta, WV WV Maintenance E Moderate 1 87,986 03
Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD DE Nonattainment C Severe-15 2 626,962 03
Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD MD Nonattainment C Severe-15 1 85,951 03
Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD NJ Nonattainment C Severe-15 6 1,748,483 02
Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD PA Nonattainment C Severe-15 5 3,849,647 03
Phoenix, AZ AZ Maintenance D Serious 1 3,028,832 09
Pike Co, PA PA Nonattainment K Incomplete Data 1 46,302 03
Pittsburgh-Beaver Valley, PA PA Maintenance E Moderate 7 2,431,087 03
Pointe Coupee Parish, LA LA Maintenance G Marginal 1 22,763 06
Portland, ME ME Nonattainment E Moderate 3 487,568 01
Portland-Vancouver AQMA, OR-WA OR Maintenance G Marginal 3 1,104,341 10
Portland-Vancouver AQMA, OR-WA WA Maintenance G Marginal 1 333,569 10
Portsmouth-Dover-Rochester, NH NH Nonattainment D Serious 2 192,379 01
Poughkeepsie, NY NY Nonattainment E Moderate 3 600,322 02
Preble Co, OH OH Maintenance J Section 185A 1 42,337 05
Providence (all of RI), RI RI Nonattainment D Serious 5 1,048,319 01
Raleigh-Durham, NC NC Maintenance E Moderate 3 864,961 04
Reading, PA PA Maintenance E Moderate 1 373,638 03
Reno, NV NV Nonattainment G Marginal 1 339,486 09
Richmond, VA VA Maintenance E Moderate 7 845,623 03
Sacramento Metro, CA CA Nonattainment C Severe-15 6 1,978,348 09
Saginaw-Bay City-Midland, MI MI Maintenance K Incomplete Data 3 403,070 05
Salem, OR OR Nonattainment K Incomplete Data 2 345,261 10
Salt Lake City, UT UT Maintenance E Moderate 2 1,137,381 08
San Diego, CA CA Maintenance D Serious 1 2,813,833 09
San Francisco Bay Area, CA CA Nonattainment F Other 9 6,541,828 09
San Joaquin Valley, CA CA Nonattainment A Extreme 8 3,191,367 09
Santa Barbara-Santa Maria-Lompoc, CA CA Maintenance D Serious 1 399,347 09
Schuylkill Co, PA PA Nonattainment K Incomplete Data 1 150,336 03
Scranton-Wilkes-Barre, PA PA Nonattainment G Marginal 5 763,463 03
Seattle-Tacoma, WA WA Maintenance G Marginal 3 3,043,878 10
Sheboygan, WI WI Maintenance E Moderate 1 112,646 05
Smyth Co, VA (White Top Mtn) VA Nonattainment H Rural Transport (Marginal) 1 0 03
Snyder Co, PA PA Nonattainment K Incomplete Data 1 37,546 03
South Bend-Elkhart, IN IN Maintenance G Marginal 2 448,350 05
Southeast Desert Modified AQMA, CA CA Nonattainment B Severe-17 3 981,158 09
Springfield (Western MA), MA MA Nonattainment D Serious 4 814,967 01
St James Par, LA LA Maintenance K Incomplete Data 1 21,216 06
St Mary Par, LA LA Maintenance K Incomplete Data 1 53,500 06
St. Louis, MO-IL IL Maintenance D Serious 3 542,642 05
St. Louis, MO-IL MO Maintenance D Serious 5 1,940,293 07
Steubenville, OH OH Maintenance J Section 185A 1 73,894 05
Sunland Park, NM (New Area 1995) NM Nonattainment G Marginal 1 10,306 06
Susquehanna Co, PA PA Nonattainment K Incomplete Data 1 42,238 03
Sussex Co, DE DE Nonattainment G Marginal 1 156,638 03
Tampa-St. Petersburg-Clearwater, FL FL Maintenance G Marginal 2 1,920,430 04
Toledo, OH OH Maintenance E Moderate 2 576,119 05
Ventura Co, CA CA Nonattainment C Severe-15 1 753,197 09
Victoria, TX TX Maintenance K Incomplete Data 1 84,088 06
Walworth Co, WI WI Maintenance G Marginal 1 93,759 05
Warren Co, PA PA Nonattainment K Incomplete Data 1 43,863 03
Washington, DC-MD-VA DC Nonattainment C Severe-15 1 572,059 03
Washington, DC-MD-VA MD Nonattainment C Severe-15 5 2,065,242 03
Washington, DC-MD-VA VA Nonattainment C Severe-15 10 1,907,643 03
Wayne Co, PA PA Nonattainment K Incomplete Data 1 47,722 03
York, PA PA Nonattainment G Marginal 2 473,043 03
Youngstown-Warren-Sharon, OH-PA OH Maintenance G Marginal 2 482,671 05
Youngstown-Warren-Sharon, OH-PA PA Nonattainment G Marginal 1 120,293 03
Yuba City, CA CA Nonattainment J Section 185A 2 114,136 09

County subtotals and grand totals may not equal sum of the counties. Part counties are only counted one time within groupings. Multi-state areas are counted only once in area totals, and are counted in maintenance totals when all states in the area have been redesignated.

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