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8-Hr Ozone (1997) Maintenance Areas (Redesignated from Nonattainment)

As of April 06, 2015
View Notes
The 1997 Ozone NAAQS was revoked effective April 6, 2015 (80 FR 12264).
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
Atlanta, GA 0.091 0.125   Moderate 20 5,260,436    4 GA
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
Boston-Manchester-Portsmouth (SE), NH 0.095 0.124   Moderate 4 740,556    1 NH
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
Charlotte-Gastonia-Rock Hill, NC-SC 0.100 0.129   Moderate 8 1,968,712    4-4 NC-SC
Chicago-Gary-Lake County, IL-IN 0.101 0.134   Moderate 10 9,049,894    5-5 IL-IN
Cincinnati-Hamilton, OH-KY-IN 0.096 0.118   Former Subpart 1 9 2,004,983    5-4-5 OH-KY-IN
Clarksville-Hopkinsville, TN-KY 0.085 0.099   Former Subpart 1 2 246,286    4-4 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 and 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 Co., 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
Las Vegas, NV 0.086 0.107   Marginal 1 1,918,819    9 NV
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 (Hampton Roads), 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
Pechanga Band of Luiseno Mission Indians of the Pechanga Reservation 0.000   Severe 17 1 2,844    9 CA
Phoenix-Mesa, AZ 0.087 0.111   Marginal 2 3,848,627    9 AZ
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
San Diego, CA 0.093 0.118   Moderate 1 3,093,459    9 CA
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
St. Louis, MO-IL 0.092 0.122   Moderate 9 2,594,238    7-5 MO-IL
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    5-3 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    5-3 OH-PA
 
80 Total Areas 259 67,044,010     

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

No. of Counties reflects the number of counties in an area, while the total count only counts a county once and doesn't double count the county if it is in more than area.

Multi-state areas are counted in the nonattainment report until all state areas have been redesignated.

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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