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PM-2.5 (1997) Designated Area/State Information
PM-2.5 (1997) Designated Area/State Information
Data is current as of March 31, 2024PM-2.5 (1997) Notes
* The 1997 Primary Annual PM-2.5 NAAQS (level of 15 µg/m3) is revoked in attainment and maintenance areas for that NAAQS. For additional information see the PM-2.5 NAAQS SIP Requirements Final Rule, effective October 24, 2016. (81 FR 58009)
| Area Name | State | Current Status | Current Classification or at Redesignation |
No. Counties |
2010 Population |
EPA Region |
|---|---|---|---|---|---|---|
|
Click underlined column heading to change report order. click area name for state/county list |
click for Classification history |
|||||
Total Areas |
Total Counties |
Total Population (2010) |
||||
| Nonattainment | 3 | 13 | 19,579,289 | |||
| Maintenance | 36 | 196 | 74,536,788 | |||
| Nonattainment and Maintenance | 39 | 208 | 94,116,077 | |||
| Atlanta, GA | GA | Maintenance * | Moderate | 22 | 5,265,299 | 04 |
| Baltimore, MD | MD | Maintenance * | Moderate | 6 | 2,662,691 | 03 |
| Birmingham, AL | AL | Maintenance * | Former Subpart 1 | 3 | 857,680 | 04 |
| Canton-Massillon, OH | OH | Maintenance * | Former Subpart 1 | 1 | 375,586 | 05 |
| Charleston, WV | WV | Maintenance * | Former Subpart 1 | 2 | 248,549 | 03 |
| Chattanooga, TN-GA-AL | AL | Maintenance * | Moderate | 1 | 1,760 | 04 |
| Chattanooga, TN-GA-AL | GA | Maintenance * | Moderate | 2 | 132,698 | 04 |
| Chattanooga, TN-GA-AL | TN | Maintenance * | Moderate | 1 | 336,463 | 04 |
| Chicago-Gary-Lake County, IL-IN | IL | Maintenance * | Former Subpart 1 | 8 | 8,389,546 | 05 |
| Chicago-Gary-Lake County, IL-IN | IN | Maintenance * | Former Subpart 1 | 2 | 660,348 | 05 |
| Cincinnati-Hamilton, OH-KY-IN | IN | Maintenance * | Former Subpart 1 | 1 | 13,516 | 05 |
| Cincinnati-Hamilton, OH-KY-IN | KY | Maintenance * | Former Subpart 1 | 3 | 368,867 | 04 |
| Cincinnati-Hamilton, OH-KY-IN | OH | Maintenance * | Former Subpart 1 | 4 | 1,580,560 | 05 |
| Cleveland-Akron-Lorain, OH | OH | Maintenance * | Former Subpart 1 | 7 | 2,709,565 | 05 |
| Columbus, OH | OH | Maintenance * | Former Subpart 1 | 5 | 1,651,811 | 05 |
| Dayton-Springfield, OH | OH | Maintenance * | Former Subpart 1 | 3 | 835,059 | 05 |
| Detroit-Ann Arbor, MI | MI | Maintenance * | Former Subpart 1 | 7 | 4,704,743 | 05 |
| Evansville, IN | IN | Maintenance * | Former Subpart 1 | 6 | 296,995 | 05 |
| Greensboro-Winston Salem-High Point, NC | NC | Maintenance * | Former Subpart 1 | 2 | 651,284 | 04 |
| Harrisburg-Lebanon-Carlisle, PA | PA | Maintenance * | Moderate | 3 | 637,074 | 03 |
| Hickory-Morganton-Lenoir, NC | NC | Maintenance * | Former Subpart 1 | 1 | 154,358 | 04 |
| Huntington-Ashland, WV-KY-OH | KY | Maintenance * | Former Subpart 1 | 2 | 52,397 | 04 |
| Huntington-Ashland, WV-KY-OH | OH | Maintenance * | Former Subpart 1 | 4 | 149,579 | 05 |
| Huntington-Ashland, WV-KY-OH | WV | Maintenance * | Former Subpart 1 | 3 | 141,206 | 03 |
| Indianapolis, IN | IN | Maintenance * | Former Subpart 1 | 5 | 1,531,958 | 05 |
| Johnstown, PA | PA | Maintenance * | Moderate | 2 | 156,923 | 03 |
| Knoxville, TN | TN | Maintenance * | Moderate | 5 | 681,523 | 04 |
| Lancaster, PA | PA | Maintenance * | Moderate | 1 | 519,445 | 03 |
| Libby, MT | MT | Maintenance * | Moderate | 1 | 9,429 | 08 |
| Liberty-Clairton, PA | PA | Nonattainment | Moderate | 1 | 20,789 | 03 |
| Los Angeles-South Coast Air Basin, CA | CA | Nonattainment | Moderate | 4 | 15,716,335 | 09 |
| Louisville, KY-IN | IN | Maintenance * | Moderate | 3 | 203,489 | 05 |
| Louisville, KY-IN | KY | Maintenance * | Moderate | 2 | 815,415 | 04 |
| Macon, GA | GA | Maintenance * | Former Subpart 1 | 2 | 158,123 | 04 |
| Martinsburg-Hagerstown, WV-MD | MD | Maintenance * | Moderate | 1 | 147,430 | 03 |
| Martinsburg-Hagerstown, WV-MD | WV | Maintenance * | Moderate | 1 | 104,169 | 03 |
| New York-N. New Jersey-Long Island, NY-NJ-CT | CT | Maintenance * | Former Subpart 1 | 2 | 1,779,306 | 01 |
| New York-N. New Jersey-Long Island, NY-NJ-CT | NJ | Maintenance * | Former Subpart 1 | 10 | 5,983,547 | 02 |
| New York-N. New Jersey-Long Island, NY-NJ-CT | NY | Maintenance * | Former Subpart 1 | 10 | 12,641,628 | 02 |
| Parkersburg-Marietta, WV-OH | OH | Maintenance * | Former Subpart 1 | 1 | 61,778 | 05 |
| Parkersburg-Marietta, WV-OH | WV | Maintenance * | Former Subpart 1 | 2 | 88,538 | 03 |
| Philadelphia-Wilmington, PA-NJ-DE | DE | Maintenance * | Moderate | 1 | 538,479 | 03 |
| Philadelphia-Wilmington, PA-NJ-DE | NJ | Maintenance * | Former Subpart 1 | 3 | 1,250,679 | 02 |
| Philadelphia-Wilmington, PA-NJ-DE | PA | Maintenance * | Moderate | 5 | 4,008,994 | 03 |
| Pittsburgh-Beaver Valley, PA | PA | Maintenance * | Moderate | 8 | 2,142,981 | 03 |
| Reading, PA | PA | Maintenance * | Moderate | 1 | 411,442 | 03 |
| Rome, GA | GA | Maintenance * | Former Subpart 1 | 1 | 96,317 | 04 |
| San Joaquin Valley, CA | CA | Nonattainment | Serious | 8 | 3,842,165 | 09 |
| St. Louis, MO-IL | IL | Maintenance * | Moderate | 4 | 573,748 | 05 |
| St. Louis, MO-IL | MO | Maintenance * | Moderate | 5 | 1,998,958 | 07 |
| Steubenville-Weirton, OH-WV | OH | Maintenance * | Former Subpart 1 | 1 | 69,709 | 05 |
| Steubenville-Weirton, OH-WV | WV | Maintenance * | Former Subpart 1 | 2 | 54,745 | 03 |
| Washington, DC-MD-VA | DC | Maintenance * | Moderate | 1 | 601,723 | 03 |
| Washington, DC-MD-VA | MD | Maintenance * | Moderate | 4 | 2,215,133 | 03 |
| Washington, DC-MD-VA | VA | Maintenance * | Moderate | 9 | 2,230,623 | 03 |
| Wheeling, WV-OH | OH | Maintenance * | Former Subpart 1 | 1 | 70,400 | 05 |
| Wheeling, WV-OH | WV | Maintenance * | Former Subpart 1 | 2 | 77,550 | 03 |
| York, PA | PA | Maintenance * | Moderate | 1 | 434,972 | 03 |
PM-2.5 (1997) Notes
County subtotals and grand totals may not equal sum of the counties. Part counties are only counted one time within groupings. Multi-state areas are counted only once in area totals, and are counted in maintenance totals when all states in the area have been redesignated.
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