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Understand its air.
Explore historical PM2.5 patterns, available local observations, and the context behind each city’s score. Browse EPA-based Clean Air Scores, see how cities compare in our National Rankings, and learn about our data sources in the Methodology.
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Local observations and historical context for major cities.
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| City | State | Score | Grade | PM2.5 (Ann.) | Trend | |
|---|---|---|---|---|---|---|
| Sevierville | TN | 69.8 | Grade C | 8.4 | Stable | View |
| Gary | IN | 69.7 | Grade C | 8.4 | Stable | View |
| Portage | IN | 69.7 | Grade C | 8.4 | Stable | View |
| Merrillville | IN | 69.7 | Grade C | 8.4 | Stable | View |
| Valparaiso | IN | 69.7 | Grade C | 8.4 | Stable | View |
| Crown Point | IN | 69.7 | Grade C | 8.4 | Stable | View |
| Hobart | IN | 69.7 | Grade C | 8.4 | Stable | View |
| Columbia | SC | 69.6 | Grade C | 8.2 | Improving ↓ | View |
| Saint Andrews | SC | 69.6 | Grade C | 8.2 | Improving ↓ | View |
| Lexington | SC | 69.6 | Grade C | 8.2 | Improving ↓ | View |
| Canton | OH | 69.4 | Grade C | 8.5 | Improving ↓ | View |
| Massillon | OH | 69.4 | Grade C | 8.5 | Improving ↓ | View |
| Alliance | OH | 69.4 | Grade C | 8.5 | Improving ↓ | View |
| New Philadelphia | OH | 69.4 | Grade C | 8.5 | Improving ↓ | View |
| North Canton | OH | 69.4 | Grade C | 8.5 | Improving ↓ | View |
| Rochester | MN | 69.3 | Grade C | 8.1 | Worsening ↑ | View |
| South Valley | NM | 69.3 | Grade C | 8.4 | Worsening ↑ | View |
| Philadelphia | PA | 69.3 | Grade C | 8.5 | Stable | View |
| Center City | PA | 69.3 | Grade C | 8.5 | Stable | View |
| Wharton | PA | 69.3 | Grade C | 8.5 | Stable | View |
| Drexel Hill | PA | 69.3 | Grade C | 8.5 | Stable | View |
| Winona | MN | 69.3 | Grade C | 8.1 | Worsening ↑ | View |
| Owatonna | MN | 69.3 | Grade C | 8.1 | Worsening ↑ | View |
| Austin | MN | 69.3 | Grade C | 8.1 | Worsening ↑ | View |
| Topeka | KS | 69.2 | Grade C | 8.1 | Stable | View |
| Lawrence | KS | 69.2 | Grade C | 8.1 | Stable | View |
| Manhattan | KS | 69.2 | Grade C | 8.1 | Stable | View |
| College Station | TX | 68.9 | Grade C | 8.2 | Stable | View |
| Bryan | TX | 68.9 | Grade C | 8.2 | Stable | View |
| Brenham | TX | 68.9 | Grade C | 8.2 | Stable | View |
| Jackson | MS | 68.7 | Grade C | 8.6 | Stable | View |
| Oklahoma City | OK | 68.7 | Grade C | 8.6 | Stable | View |
| Medford | OR | 68.7 | Grade C | 7.9 | Improving ↓ | View |
| Edmond | OK | 68.7 | Grade C | 8.6 | Stable | View |
| Midwest City | OK | 68.7 | Grade C | 8.6 | Stable | View |
| Pearl | MS | 68.7 | Grade C | 8.6 | Stable | View |
| Yukon | OK | 68.7 | Grade C | 8.6 | Stable | View |
| Madison | MS | 68.7 | Grade C | 8.6 | Stable | View |
| Clinton | MS | 68.7 | Grade C | 8.6 | Stable | View |
| Ridgeland | MS | 68.7 | Grade C | 8.6 | Stable | View |
| Brandon | MS | 68.7 | Grade C | 8.6 | Stable | View |
| Vicksburg | MS | 68.7 | Grade C | 8.6 | Stable | View |
| Del City | OK | 68.7 | Grade C | 8.6 | Stable | View |
| Ashland | OR | 68.7 | Grade C | 7.9 | Improving ↓ | View |
| Mustang | OK | 68.7 | Grade C | 8.6 | Stable | View |
| Bethany | OK | 68.7 | Grade C | 8.6 | Stable | View |
| El Reno | OK | 68.7 | Grade C | 8.6 | Stable | View |
| Central Point | OR | 68.7 | Grade C | 7.9 | Improving ↓ | View |
| Manteca | CA | 68.6 | Grade C | 8.2 | Stable | View |
| East Saint Louis | IL | 68.6 | Grade C | 8.6 | Improving ↓ | View |