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Maintenance 8-Hour Ozone (1997) Areas

As of December 14, 2012
View Notes
Current and historical design value data can be found at http://www.epa.gov/airtrends/values.html
Areas Listed Alphabetically Design Values
(2001-2003)
(ppm)		 Classification No.
Counties
NAA 		2010
Population		 EPA
Region		 State
8-Hr 1-Hr
Allegan Co, MI 0.097 0.115   Former Subpart 1 1 111,408    5 MI
Allentown-Bethlehem-Easton, PA 0.091 0.114   Former Subpart 1 3 712,481    3 PA
Altoona, PA 0.085 0.107   Former Subpart 1 1 127,089    3 PA
Baton Rouge, LA 0.086 0.131   Moderate 5 732,587    6 LA
Beaumont-Port Arthur, TX 0.091 0.129   Moderate 3 388,745    6 TX
Benton Harbor, MI 0.091 0.117   Former Subpart 1 1 156,813    5 MI
Benzie Co, MI 0.088 0.116   Former Subpart 1 1 17,525    5 MI
Birmingham, AL 0.087 0.113   Former Subpart 1 2 853,551    4 AL
Canton-Massillon, OH 0.090 0.109   Former Subpart 1 1 375,586    5 OH
Cass Co, MI 0.093 0.124   Marginal 1 52,293    5 MI
Charleston, WV 0.086 0.107   Former Subpart 1 2 248,549    3 WV
Chicago-Gary-Lake County, IL-IN 0.101 0.134   Moderate 10 9,049,894    5 IL-IN
Cincinnati-Hamilton, OH-KY-IN 0.096 0.118   Former Subpart 1 9 2,004,983    4 5 OH-KY-IN
Clarksville-Hopkinsville, TN-KY 0.085 0.099   Former Subpart 1 2 246,286    4 TN-KY
Clearfield and Indiana Cos, PA 0.090 0.106   Former Subpart 1 2 170,522    3 PA
Cleveland-Akron-Lorain, OH 0.103 0.128   Moderate 8 2,881,937    5 OH
Columbus, OH 0.095 0.117   Former Subpart 1 6 1,754,632    5 OH
Dayton-Springfield, OH 0.090 0.117   Former Subpart 1 4 937,565    5 OH
Detroit-Ann Arbor, MI 0.097 0.127   Marginal 8 4,804,635    5 MI
Door Co, WI 0.094 0.113   Former Subpart 1 1 27,785    5 WI
Erie, PA 0.092 0.114   Former Subpart 1 1 280,566    3 PA
Evansville, IN 0.085 0.106   Former Subpart 1 2 239,392    5 IN
Flint, MI 0.090 0.103   Former Subpart 1 2 514,109    5 MI
Fort Wayne, IN 0.088 0.106   Former Subpart 1 1 355,329    5 IN
Franklin Co, PA 0.093 0.114   Former Subpart 1 1 149,618    3 PA
Fredericksburg, VA 0.099 0.140   Moderate 3 275,644    3 VA
Grand Rapids, MI 0.089 0.110   Former Subpart 1 2 866,423    5 MI
Greene Co, IN 0.088 0.102   Former Subpart 1 1 33,165    5 IN
Greene Co, PA 0.089 0.107   Former Subpart 1 1 38,686    3 PA
Hancock, Knox, Lincoln & Waldo Cos, ME 0.094 0.120   Former Subpart 1 4 97,265    1 ME
Harrisburg-Lebanon-Carlisle, PA 0.088 0.111   Former Subpart 1 4 683,043    3 PA
Haywood and Swain Cos (Great Smoky NP), NC 0.085 0.104   Former Subpart 1 2 4,273    4 NC
Huntington-Ashland, WV-KY 0.091 0.115   Former Subpart 1 3 188,342    3 4 WV-KY
Huron Co, MI 0.087 0.109   Former Subpart 1 1 33,118    5 MI
Indianapolis, IN 0.096 0.119   Former Subpart 1 9 1,834,672    5 IN
Jackson Co, IN 0.085 0.100   Former Subpart 1 1 42,376    5 IN
Johnstown, PA 0.087 0.106   Former Subpart 1 1 143,679    3 PA
Kalamazoo-Battle Creek, MI 0.086 0.102   Former Subpart 1 3 462,735    5 MI
Kent and Queen Anne's Cos, MD 0.095 0.122   Marginal 2 67,995    3 MD
Kewaunee Co, WI 0.093 0.110   Former Subpart 1 1 20,574    5 WI
Knoxville, TN 0.092 0.114   Former Subpart 1 7 821,883    4 TN
La Porte, IN 0.093 0.135   Marginal 1 111,467    5 IN
Lancaster, PA 0.092 0.124   Marginal 1 519,445    3 PA
Lansing-East Lansing, MI 0.086 0.102   Former Subpart 1 3 464,036    5 MI
Lima, OH 0.089 0.108   Former Subpart 1 1 106,331    5 OH
Louisville, KY-IN 0.092 0.120   Former Subpart 1 5 1,060,541    4 5 KY-IN
Macon, GA 0.086 0.113   Former Subpart 1 2 158,123    4 GA
Madison and Page Cos (Shenandoah NP), VA 0.087 0.104   Former Subpart 1 2 2,026    3 VA
Manitowoc Co, WI 0.090 0.110   Former Subpart 1 1 81,442    5 WI
Mason Co, MI 0.089 0.114   Former Subpart 1 1 28,705    5 MI
Memphis, TN-AR 0.092 0.126   Moderate 2 978,546    4 6 TN-AR
Milwaukee-Racine, WI 0.101 0.134   Moderate 6 1,917,742    5 WI
Muncie, IN 0.088 0.104   Former Subpart 1 1 117,671    5 IN
Murray Co (Chattahoochee Nat Forest), GA 0.085 0.103   Former Subpart 1 1 6,231    4 GA
Muskegon, MI 0.095 0.121   Marginal 1 172,188    5 MI
Norfolk-Virginia Beach-Newport News (HR), VA 0.090 0.121   Marginal 13 1,632,100    3 VA
Parkersburg-Marietta, WV-OH 0.087 0.113   Former Subpart 1 2 148,734    3 5 WV-OH
Portland, ME 0.091 0.126   Marginal 4 481,641    1 ME
Raleigh-Durham-Chapel Hill, NC 0.094 0.118   Former Subpart 1 8 1,663,630    4 NC
Reading, PA 0.091 0.116   Former Subpart 1 1 411,442    3 PA
Richmond-Petersburg, VA 0.094 0.131   Marginal 9 1,042,651    3 VA
Rocky Mount, NC 0.089 0.106   Former Subpart 1 2 152,392    4 NC
Scranton-Wilkes-Barre, PA 0.086 0.108   Former Subpart 1 4 733,473    3 PA
South Bend-Elkhart, IN 0.093 0.116   Former Subpart 1 2 464,490    5 IN
State College, PA 0.088 0.109   Former Subpart 1 1 153,990    3 PA
Steubenville-Weirton, OH-WV 0.086 0.113   Former Subpart 1 3 124,454    3 5 OH-WV
Terre Haute, IN 0.087 0.108   Former Subpart 1 1 107,848    5 IN
Tioga Co, PA 0.086 0.102   Former Subpart 1 1 41,981    3 PA
Toledo, OH 0.093 0.112   Former Subpart 1 2 567,303    5 OH
Wheeling, WV-OH 0.087 0.111   Former Subpart 1 3 147,950    3 5 WV-OH
York, PA 0.089 0.114   Former Subpart 1 2 536,379    3 PA
Youngstown-Warren-Sharon, OH-PA 0.095 0.118   Former Subpart 1 4 673,614    3 5 OH-PA
 
72 Total Areas 213 47,616,319     

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

On June 8, 2007, the United States Court of Appeals vacated the Subpart 1 portion of the Phase 1 Rule (Court Order) (PDF). On May 14, 2012, the Former Subpart 1 nonattainment areas were classified under Subpart 2 (77 FR 28424 (PDF)), effective June 13, 2012.


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