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Maintenance Particulate Matter (PM-10) Areas
As of November 13, 2009
| Areas Listed Alphabetically | Classification | No. Counties NAA |
Population | EPA Region |
State |
|---|---|---|---|---|---|
| Aspen, CO | Moderate | 1 | 5,873 | 8 | CO |
| Boise-Northern Ada County, ID | Moderate | 1 | 184,244 | 10 | ID |
| Canon City, CO | Moderate | 1 | 18,587 | 8 | CO |
| Clairton & 4 Boroughs, PA | Moderate | 1 | 21,600 | 3 | PA |
| Cuyahoga Co, OH | Moderate | 1 | 1,393,978 | 5 | OH |
| Denver Metro, CO | Moderate | 7 | 2,389,470 | 8 | CO |
| East Chicago, IN | Moderate | 1 | 209,913 | 5 | IN |
| Follansbee, WV | Moderate | 1 | 2,827 | 3 | WV |
| Granite City, Nameoki Twsp, IL | Moderate | 1 | 34,284 | 5 | IL |
| Grants Pass, OR | Moderate | 1 | 20,552 | 10 | OR |
| Indian Wells, CA | Moderate | 1 | 12,174 | 9 | CA |
| Jefferson Co, OH | Moderate | 1 | 3,680 | 5 | OH |
| Kent, WA | Moderate | 1 | 42,557 | 10 | WA |
| King Co, WA | Moderate | 1 | 594,587 | 10 | WA |
| Klamath Falls, OR | Moderate | 1 | 19,891 | 10 | OR |
| LaGrande, OR | Moderate | 1 | 12,474 | 10 | OR |
| Lake Co, OR | Moderate | 1 | 3,099 | 10 | OR |
| Lamar, CO | Moderate | 1 | 8,681 | 8 | CO |
| Lyons Twsp., IL | Moderate | 1 | 109,264 | 5 | IL |
| Medford-Ashland, OR | Moderate | 1 | 78,018 | 10 | OR |
| Mohave Co, AZ | Moderate | 1 | 8,294 | 9 | AZ |
| New Haven Co, CT | Moderate | 1 | 123,626 | 1 | CT |
| Oglesby, IL | Moderate | 1 | 3,780 | 5 | IL |
| Olmsted Co, MN | Moderate | 1 | 82,880 | 5 | MN |
| Olympia, Tumwater, Lacey, WA | Moderate | 1 | 81,014 | 10 | WA |
| Pagosa Springs, CO | Moderate | 1 | 1,852 | 8 | CO |
| Payson, AZ | Moderate | 1 | 5,108 | 9 | AZ |
| Pierce Co, WA | Moderate | 1 | 210,386 | 10 | WA |
| Portneuf Valley, ID | Moderate | 2 | 66,382 | 10 | ID |
| Presque Isle, ME | Moderate | 1 | 1,000 | 1 | ME |
| Ramsey Co, MN | Moderate | 1 | 286,128 | 5 | MN |
| San Joaquin Valley Air Basin, CA | Serious | 7 | 2,980,813 | 9 | CA |
| Southeast Chicago, IL | Moderate | 1 | 3,226 | 5 | IL |
| Spokane Co, WA | Moderate | 1 | 204,707 | 10 | WA |
| Steamboat Springs, CO | Moderate | 1 | 9,815 | 8 | CO |
| Telluride, CO | Moderate | 1 | 1,805 | 8 | CO |
| Vermillion Co, IN | Moderate | 1 | 9,544 | 5 | IN |
| Wallula, WA | Serious | 1 | 400 | 10 | WA |
| Wayne Co, MI | Moderate | 1 | 951,270 | 5 | MI |
| Weirton, WV | Moderate | 2 | 15,085 | 3 | WV |
| Yakima Co, WA | Moderate | 1 | 63,658 | 10 | WA |
| 41 Total Areas | 51 | 10,276,526 | |||
The county total was 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.