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Previous Maintenance Areas No Longer Subject to the 1-hour Standard
As of June 15, 2005
View Notes
| Areas Listed Alphabetically | Design Value (ppm) |
Average Expected Exceedence |
Yr | Previous Classification |
No. of NAA Counties Before Nov 90 |
No. of New Counties |
Total No. of Counties |
2000 Pop. (1000's) |
EPA Region |
State | Located in MSA/CMSA |
Year of SIP Call |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Atlanta, GA | 0.162 | 9.3 | 1989 | Severe-15 | 11 | 2 | 13 | 3,699 | 4 | GA | msa | 1988 |
| Birmingham, AL | 0.133 | 3.0 | 1989 | Marginal | 1 | 1 | 2 | 805 | 4 | AL | msa | 1988 |
| Canton, OH | 0.135 | 1.7 | 1989 | Marginal | 1 | 0 | 1 | 378 | 5 | OH | msa | 1989 |
| Charleston, WV | 0.138 | 2.3 | 1989 | Moderate | 0 | 2 | 2 | 252 | 3 | WV | msa | 1989 |
| Charlotte-Gastonia, NC | 0.158 | 3.4 | 1989 | Moderate | 1 | 1 | 2 | 886 | 4 | NC | msa | 1988 |
| Cherokee Co, SC | 0.132 | 2.4 | 1989 | Marginal | 0 | 1 | 1 | 53 | 4 | SC | no | 1989 |
| Cincinnati-Hamilton, OH-KY | 0.157 | 5.4 | 1989 | Moderate | 7 | 0 | 7 | 1,841 | 5 4 | OH-KY | cmsa | 1988 |
| Cleveland-Akron-Lorain, OH | 0.157 | 5.2 | 1989 | Moderate | 7 | 1 | 8 | 2,946 | 5 | OH | cmsa | 1988 |
| Columbus, OH | 0.131 | 1.4 | 1989 | Marginal | 0 | 3 | 3 | 1,324 | 5 | OH | msa | 1989 |
| Dayton-Springfield, OH | 0.143 | 3.1 | 1989 | Moderate | 4 | 0 | 4 | 951 | 5 | OH | msa | 1989 |
| Detroit-Ann Arbor, MI | 0.144 | 3.7 | 1989 | Moderate | 7 | 0 | 7 | 4,833 | 5 | MI | cmsa | 1988 |
| Door Co, WI | 0.126 | 1.8 | 1990 | Marginal RT | 0 | 1 | 1 | 28 | 5 | WI | no | no |
| East Kern Co, CA | 0.170 | 44.2 | 1989 | Serious | 0 | 1 | 1 | 111 | 9 | CA | ||
| Edmonson Co, KY | 0.140 | 2.1 | 1989 | Marginal RT | 0 | 1 | 1 | 12 | 4 | KY | no | 1989 |
| Evansville, IN | 0.124 | 1.1 | 1989 | Marginal | 0 | 1 | 1 | 172 | 5 | IN | msa | 1989 |
| Grand Rapids, MI | 0.143 | 4.4 | 1989 | Moderate | 2 | 0 | 2 | 813 | 5 | MI | msa | 1988 |
| Greenbrier Co, WV | 0.125 | 1.4 | 1989 | Marginal | 0 | 1 | 1 | 34 | 4 | WV | no | 1989 |
| Hancock & Waldo Cos, ME | 0.133 | 2.8 | 1989 | Marginal | 1 | 1 | 2 | 88 | 1 | ME | no | 1988 |
| Huntington-Ashland, WV-KY | 0.164 | 5.5 | 1989 | Moderate* | 1 | 3 | 4 | 207 | 3 4 | WV-KY | msa | 1988 |
| Indianapolis, IN | 0.121 | 1.1 | 1989 | Marginal | 1 | 0 | 1 | 860 | 5 | IN | msa | 1988 |
| Jersey Co, IL | 0.129 | 3.1 | 1990 | Marginal | 0 | 1 | 1 | 22 | 5 | IL | msa | 1988 |
| Kansas City, MO-KS | 0.120 | 1.2 | 1989 | Other | 5 | 0 | 5 | 1,522 | 7 | MO-KS | msa | no |
| Kent & Queen Anne's Co.s, MD | 0.131 | 1.6 | 1990 | Marginal | 0 | 2 | 2 | 60 | 3 | MD | part | part |
| Kewaunee Co, WI | 0.147 | 5.5 | 1989 | Moderate | 0 | 1 | 1 | 20 | 5 | WI | no | 1988 |
| Knoxville, TN | 0.135 | 1.8 | 1989 | Marginal | 0 | 1 | 1 | 382 | 4 | TN | msa | 1989 |
| Lake Charles, LA | 0.131 | 2.0 | 1989 | Marginal | 1 | 0 | 1 | 184 | 6 | LA | msa | 1989 |
| Lexington-Fayette, KY | 0.126 | 2.0 | 1989 | Marginal | 0 | 2 | 2 | 294 | 4 | KY | msa | 1988 |
| Louisville, KY-IN | 0.149 | 1.9 | 1989 | Moderate | 3 | 2 | 5 | 883 | 4 5 | KY-IN | msa | 1988 |
| Manitowoc Co, WI | 0.167 | 9.9 | 1989 | Moderate* | 0 | 1 | 1 | 83 | 5 | WI | no | 1988 |
| Memphis, TN | 0.140 | 2.0 | 1989 | Marginal* | 1 | 0 | 1 | 897 | 4 | TN | msa | 1988 |
| Miami-Fort Lauderdale-W. Palm Beach, FL | 0.138 | 1.7 | 1989 | Moderate | 3 | 0 | 3 | 5,008 | 4 | FL | cmsa | 1988 |
| Monterey Bay, CA | 0.138 | 1.8 | 1989 | Moderate | 3 | 0 | 3 | 711 | 9 | CA | msa | no |
| Muskegon, MI | 0.181 | 9.4 | 1989 | Moderate | 1 | 0 | 1 | 170 | 5 | MI | msa | 1988 |
| Norfolk-Virginia Beach-Newport News (Hampton Roa | 0.130 | 2.0 | 1989 | Marginal | 0 | 11 | 11 | 1,478 | 3 | VA | msa | 1988 |
| Owensboro, KY | 0.137 | 3.7 | 1989 | Marginal | 0 | 2 | 2 | 92 | 4 | KY | msa | 1989 |
| Paducah, KY | 0.124 | 1.1 | 1989 | Marginal | 0 | 2 | 2 | 31 | 4 | KY | no | 1989 |
| Parkersburg, WV | 0.152 | 6.7 | 1989 | Moderate | 0 | 1 | 1 | 88 | 3 | WV | msa | 1988 |
| Phoenix, AZ | 0.141 | 6.0 | 1990 | Serious | 1 | 0 | 1 | 3,029 | 9 | AZ | msa | 1988 |
| Pittsburgh-Beaver Valley, PA | 0.149 | 7.0 | 1989 | Moderate | 7 | 0 | 7 | 2,431 | 3 | PA | cmsa | 1988 |
| Pointe Coupee Parish, LA | 0.0 | Marginal | 0 | 1 | 1 | 23 | 6 | LA | ||||
| Portland-Vancouver AQMA, OR-WA | 0.128 | 2.2 | 1990 | Marginal | 4 | 0 | 4 | 1,438 | 10 | OR-WA | cmsa | 1988 |
| Raleigh-Durham, NC | 0.141 | 4.1 | 1989 | Moderate | 0 | 3 | 3 | 865 | 4 | NC | msa | 1988 |
| Reading, PA | 0.141 | 3.4 | 1989 | Moderate | 1 | 0 | 1 | 374 | 3 | PA | msa | 1989 |
| Richmond, VA | 0.142 | 4.4 | 1989 | Moderate | 3 | 4 | 7 | 846 | 3 | VA | msa | 1988 |
| Salt Lake City, UT | 0.143 | 2.0 | 1989 | Moderate | 2 | 0 | 2 | 1,137 | 8 | UT | msa | 1988 |
| San Diego, CA | 0.185 | 12.3 | 1989 | Serious | 1 | 0 | 1 | 2,814 | 9 | CA | msa | 1988 |
| Santa Barbara-Santa Maria-Lompoc, CA | 0.140 | 2.1 | 1989 | Serious | 1 | 0 | 1 | 399 | 9 | CA | msa | 1988 |
| Seattle-Tacoma, WA | 0.131 | 3.3 | 1990 | Marginal | 0 | 3 | 3 | 3,044 | 10 | WA | cmsa | no |
| Sheboygan, WI | 0.176 | 9.1 | 1989 | Moderate | 1 | 0 | 1 | 113 | 5 | WI | msa | 1988 |
| South Bend-Elkhart, IN | 0.121 | 1.1 | 1989 | Marginal | 2 | 0 | 2 | 448 | 5 | IN | msa | 1989 |
| St Louis, MO-IL | 0.156 | 6.2 | 1989 | Serious | 8 | 0 | 8 | 2,483 | 7 5 | MO-IL | msa | 1988 |
| Tampa-St. Petersburg-Clearwater, FL | 0.129 | 1.4 | 1989 | Marginal | 2 | 0 | 2 | 1,920 | 4 | FL | msa | 1988 |
| Toledo, OH | 0.140 | 2.7 | 1989 | Moderate | 1 | 1 | 2 | 576 | 5 | OH | msa | 1989 |
| Walworth Co, WI | 0.129 | 2.0 | 1989 | Marginal | 0 | 1 | 1 | 94 | 5 | WI | no | 1988 |
| Youngstown-Warren-Sharon, OH portion | 0.134 | 2.1 | 1989 | Marginal | 2 | 1 | 2 | 483 | 5 | OH | msa | 1989 |
| 54 Total Areas | 97 | 59 | 156 | 54,735 | ||||||||
Totals were adjusted to account for multiple maintenance areas in a single county, and the area total was adjusted to only include complete maintenance areas if all states of a multi-state area is listed.
Yr = Data from 1987-89 or 1988-90
RT = Rural Transport
* 5% Classification Change
No. Counties Before '90 = Prior designation retained by operation of law
Sip Call = EPA called for a new State Implementation Plan
The Ohio portion of the Youngstown-Warren-Sharon OH-PA area is a previous maintenance area, while the Pennsylvania portion remains previous nonattainment. This report lists the OH portion of the area, but does not include it in the total count.
The former 1-hour ozone designations and classifications as of June 15, 2004, are being retained in subpart C of Part 81 for purposes of the anti backsliding provisions of 40 CFR 51.905. 40 CFR 51.905(c) references subpart C of part 81 for the areas affected.
Two 1-hour Ozone Maintenance Areas (that were previously nonattainment areas) became Early Action Compact (EAC) areas. As EAC areas, their maintenance plans no longer applied, and they are not listed in the “Previous Maintenance Areas No Longer Subject to the 1-hour Standard” reports. The areas are: Greensboro Winston Salem High Point, NC (initially classified as a Moderate 1-hour Ozone area), and Denver Boulder, CO (initially classified as a Section 185 1-hour Ozone area).