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Maintenance 8-Hour Ozone Areas
As of November 13, 2009
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.
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 Greenbook are listed as "Former Subpart 1" until reclassification of the areas is finalized. Proposed reclassifications were published on January 16, 2009 (74 FR 2936).
* Design values for 2001-2003 period.
View Notes| Areas Listed Alphabetically | 8-hr* Design Value (ppm) |
1-hr* Design Value (ppm) |
Previous Category/ Classification |
2000 Pop. |
No. of 8-Hr Counties |
No. of 1-Hr** Counties |
EPA Region |
State |
|---|---|---|---|---|---|---|---|---|
| Allentown-Bethlehem-Easton, PA | 0.091 | 0.114 | Former Subpart 1 | 637,958 | 3 | 3 | 3 | PA |
| Altoona, PA | 0.085 | 0.107 | Former Subpart 1 | 129,144 | 1 | 1 | 3 | PA |
| Benton Harbor, MI | 0.091 | 0.117 | Former Subpart 1 | 162,453 | 1 | 0 | 5 | MI |
| Benzie Co, MI | 0.088 | 0.116 | Former Subpart 1 | 15,998 | 1 | 0 | 5 | MI |
| Birmingham, AL | 0.087 | 0.113 | Former Subpart 1 | 805,340 | 2 | 2 | 4 | AL |
| Canton-Massillon, OH | 0.090 | 0.109 | Former Subpart 1 | 378,098 | 1 | 1 | 5 | OH |
| Cass Co, MI | 0.093 | 0.124 | Marginal | 51,104 | 1 | 0 | 5 | MI |
| Charleston, WV | 0.086 | 0.107 | Former Subpart 1 | 251,662 | 2 | 2 | 3 | WV |
| Clarksville-Hopkinsville, TN-KY | 0.085 | 0.099 | Former Subpart 1 | 207,033 | 2 | 0 | 4 | TN-KY |
| Clearfield and Indiana Cos, PA | 0.090 | 0.106 | Former Subpart 1 | 172,987 | 2 | 0 | 3 | PA |
| Cleveland-Akron-Lorain, OH | 0.103 | 0.128 | Moderate | 2,945,831 | 8 | 8 | 5 | OH |
| Columbus, OH | 0.095 | 0.117 | Former Subpart 1 | 1,541,930 | 6 | 3 | 5 | OH |
| Dayton-Springfield, OH | 0.090 | 0.117 | Former Subpart 1 | 950,558 | 4 | 4 | 5 | OH |
| Detroit-Ann Arbor, MI | 0.097 | 0.127 | Marginal | 4,932,383 | 8 | 7 | 5 | MI |
| Erie, PA | 0.092 | 0.114 | Former Subpart 1 | 280,843 | 1 | 1 | 3 | PA |
| Evansville, IN | 0.085 | 0.106 | Former Subpart 1 | 224,305 | 2 | 1 | 5 | IN |
| Flint, MI | 0.090 | 0.103 | Former Subpart 1 | 524,045 | 2 | 1 | 5 | MI |
| Fort Wayne, IN | 0.088 | 0.106 | Former Subpart 1 | 331,849 | 1 | 0 | 5 | IN |
| Franklin Co, PA | 0.093 | 0.114 | Former Subpart 1 | 129,313 | 1 | 1 | 3 | PA |
| Fredericksburg, VA | 0.099 | 0.140 | Moderate | 202,120 | 3 | 1 | 3 | VA |
| Grand Rapids, MI | 0.089 | 0.110 | Former Subpart 1 | 812,649 | 2 | 2 | 5 | MI |
| Greene Co, IN | 0.088 | 0.102 | Former Subpart 1 | 33,157 | 1 | 0 | 5 | IN |
| Greene Co, PA | 0.089 | 0.107 | Former Subpart 1 | 40,672 | 1 | 1 | 3 | PA |
| Hancock, Knox, Lincoln & Waldo Cos, ME | 0.094 | 0.120 | Former Subpart 1 | 92,476 | 4 | 4 | 1 | ME |
| Harrisburg-Lebanon-Carlisle, PA | 0.088 | 0.111 | Former Subpart 1 | 629,401 | 4 | 4 | 3 | PA |
| Huntington-Ashland, WV-KY | 0.091 | 0.115 | Former Subpart 1 | 189,439 | 3 | 3 | 3 4 | WV-KY |
| Huron Co, MI | 0.087 | 0.109 | Former Subpart 1 | 36,079 | 1 | 0 | 5 | MI |
| Indianapolis, IN | 0.096 | 0.119 | Former Subpart 1 | 1,607,486 | 9 | 1 | 5 | IN |
| Jackson Co, IN | 0.085 | 0.100 | Former Subpart 1 | 41,335 | 1 | 0 | 5 | IN |
| Johnstown, PA | 0.087 | 0.106 | Former Subpart 1 | 152,598 | 1 | 1 | 3 | PA |
| Kalamazoo-Battle Creek, MI | 0.086 | 0.102 | Former Subpart 1 | 452,851 | 3 | 0 | 5 | MI |
| Kent and Queen Anne's Cos, MD | 0.095 | 0.122 | Marginal | 59,760 | 2 | 2 | 3 | MD |
| Kewaunee Co, WI | 0.093 | 0.110 | Former Subpart 1 | 20,187 | 1 | 1 | 5 | WI |
| La Porte, IN | 0.093 | 0.135 | Marginal | 110,106 | 1 | 0 | 5 | IN |
| Lancaster, PA | 0.092 | 0.124 | Marginal | 470,658 | 1 | 1 | 3 | PA |
| Lansing-East Lansing, MI | 0.086 | 0.102 | Former Subpart 1 | 447,728 | 3 | 0 | 5 | MI |
| Lima, OH | 0.089 | 0.108 | Former Subpart 1 | 108,473 | 1 | 0 | 5 | OH |
| Louisville, KY-IN | 0.092 | 0.120 | Former Subpart 1 | 968,313 | 5 | 5 | 4 5 | KY-IN |
| Macon, GA | 0.086 | 0.113 | Former Subpart 1 | 153,937 | 2 | 0 | 4 | GA |
| Madison and Page Cos (Shenandoah NP), VA | 0.087 | 0.104 | Former Subpart 1 | 2 | 2 | 0 | 3 | VA |
| Mason Co, MI | 0.089 | 0.114 | Former Subpart 1 | 28,274 | 1 | 0 | 5 | MI |
| Muncie, IN | 0.088 | 0.104 | Former Subpart 1 | 118,769 | 1 | 0 | 5 | IN |
| Murray Co (Chattahoochee Nat Forest), GA | 0.085 | 0.103 | Former Subpart 1 | 1,000 | 1 | 0 | 4 | GA |
| Muskegon, MI | 0.095 | 0.121 | Marginal | 170,200 | 1 | 1 | 5 | MI |
| Norfolk-Virginia Beach-Newport News (HR),VA | 0.090 | 0.121 | Marginal | 1,542,144 | 13 | 11 | 3 | VA |
| Parkersburg-Marietta, WV-OH | 0.087 | 0.113 | Former Subpart 1 | 151,237 | 2 | 1 | 3 5 | WV-OH |
| Portland, ME | 0.091 | 0.126 | Marginal | 456,508 | 4 | 4 | 1 | ME |
| Raleigh-Durham-Chapel Hill, NC | 0.094 | 0.118 | Former Subpart 1 | 1,244,053 | 8 | 3 | 4 | NC |
| Reading, PA | 0.091 | 0.116 | Former Subpart 1 | 373,638 | 1 | 1 | 3 | PA |
| Richmond-Petersburg, VA | 0.094 | 0.131 | Marginal | 919,277 | 9 | 7 | 3 | VA |
| Rocky Mount, NC | 0.089 | 0.106 | Former Subpart 1 | 143,026 | 2 | 0 | 4 | NC |
| Scranton-Wilkes-Barre, PA | 0.086 | 0.108 | Former Subpart 1 | 699,312 | 4 | 4 | 3 | PA |
| South Bend-Elkhart, IN | 0.093 | 0.116 | Former Subpart 1 | 448,350 | 2 | 2 | 5 | IN |
| State College, PA | 0.088 | 0.109 | Former Subpart 1 | 135,758 | 1 | 0 | 3 | PA |
| Steubenville-Weirton, OH-WV | 0.086 | 0.113 | Former Subpart 1 | 132,008 | 3 | 1 | 3 5 | OH-WV |
| Terre Haute, IN | 0.087 | 0.108 | Former Subpart 1 | 105,848 | 1 | 0 | 5 | IN |
| Tioga Co, PA | 0.086 | 0.102 | Former Subpart 1 | 41,373 | 1 | 0 | 3 | PA |
| Toledo, OH | 0.093 | 0.112 | Former Subpart 1 | 576,119 | 2 | 2 | 5 | OH |
| Wheeling, WV-OH | 0.087 | 0.111 | Former Subpart 1 | 153,172 | 3 | 0 | 3 5 | WV-OH |
| York, PA | 0.089 | 0.114 | Former Subpart 1 | 473,043 | 2 | 2 | 3 | PA |
| Youngstown-Warren-Sharon, OH-PA | 0.095 | 0.118 | Former Subpart 1 | 715,039 | 4 | 4 | 3 5 | OH-PA |
| 61 Total Areas | 29,930,409 | 166 | ||||||
** The 1-hour ozone standard, as well as designations and classifications for all 1-hour ozone nonattainment and maintenance areas, have been revoked except for the Greensboro, NC, Nashville, TN, and Denver, CO maintenance areas. See details here.
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