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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 | |
|---|---|---|---|---|---|---|
| Seminole | FL | 82.1 | Grade B | 6.1 | Stable | View |
| Safety Harbor | FL | 82.1 | Grade B | 6.1 | Stable | View |
| Goleta | CA | 82 | Grade B | 6.2 | Worsening ↑ | View |
| Spanish Fork | UT | 82 | Grade B | 6.2 | Worsening ↑ | View |
| Provo | UT | 82 | Grade B | 6.2 | Worsening ↑ | View |
| Orem | UT | 82 | Grade B | 6.2 | Worsening ↑ | View |
| Pleasant Grove | UT | 82 | Grade B | 6.2 | Worsening ↑ | View |
| Springville | UT | 82 | Grade B | 6.2 | Worsening ↑ | View |
| Isla Vista | CA | 82 | Grade B | 6.2 | Worsening ↑ | View |
| Payson | UT | 82 | Grade B | 6.2 | Worsening ↑ | View |
| Thousand Oaks | CA | 81.8 | Grade B | 6.3 | Improving ↓ | View |
| Stuart | FL | 81.8 | Grade B | 6.3 | Stable | View |
| Oxnard | CA | 81.8 | Grade B | 6.3 | Improving ↓ | View |
| Port Saint Lucie | FL | 81.8 | Grade B | 6.3 | Stable | View |
| Camarillo | CA | 81.8 | Grade B | 6.3 | Improving ↓ | View |
| Jupiter | FL | 81.8 | Grade B | 6.3 | Stable | View |
| Fort Pierce | FL | 81.8 | Grade B | 6.3 | Stable | View |
| Palm City | FL | 81.8 | Grade B | 6.3 | Stable | View |
| Vero Beach South | FL | 81.8 | Grade B | 6.3 | Stable | View |
| Port Hueneme | CA | 81.8 | Grade B | 6.3 | Improving ↓ | View |
| Agoura Hills | CA | 81.8 | Grade B | 6.3 | Improving ↓ | View |
| Agoura | CA | 81.8 | Grade B | 6.3 | Improving ↓ | View |
| Florida Ridge | FL | 81.8 | Grade B | 6.3 | Stable | View |
| Redding | CA | 81.5 | Grade B | 6 | Improving ↓ | View |
| New Haven | CT | 81.5 | Grade B | 6.4 | Improving ↓ | View |
| Hamden | CT | 81.5 | Grade B | 6.4 | Improving ↓ | View |
| West Haven | CT | 81.5 | Grade B | 6.4 | Improving ↓ | View |
| Shelton | CT | 81.5 | Grade B | 6.4 | Improving ↓ | View |
| Branford | CT | 81.5 | Grade B | 6.4 | Improving ↓ | View |
| East Haven | CT | 81.5 | Grade B | 6.4 | Improving ↓ | View |
| North Haven | CT | 81.5 | Grade B | 6.4 | Improving ↓ | View |
| Guilford | CT | 81.5 | Grade B | 6.4 | Improving ↓ | View |
| Madison | CT | 81.5 | Grade B | 6.4 | Improving ↓ | View |
| Ansonia | CT | 81.5 | Grade B | 6.4 | Improving ↓ | View |
| Wallingford Center | CT | 81.5 | Grade B | 6.4 | Improving ↓ | View |
| Wallingford | CT | 81.5 | Grade B | 6.4 | Improving ↓ | View |
| Seymour | CT | 81.5 | Grade B | 6.4 | Improving ↓ | View |
| Missoula | MT | 81.4 | Grade B | 5.4 | Improving ↓ | View |
| Duluth | MN | 81.3 | Grade B | 5.9 | Stable | View |
| Superior | MN | 81.3 | Grade B | 5.9 | Stable | View |
| Dover | DE | 81.2 | Grade B | 6.4 | Stable | View |
| Normal | IL | 81.2 | Grade B | 6.4 | Improving ↓ | View |
| Bloomington | IN | 81.2 | Grade B | 6.5 | Improving ↓ | View |
| Bloomington | IL | 81.2 | Grade B | 6.4 | Improving ↓ | View |
| Plainfield | IN | 81.2 | Grade B | 6.5 | Improving ↓ | View |
| Easton | DE | 81.2 | Grade B | 6.4 | Stable | View |
| Avon | IN | 81.2 | Grade B | 6.5 | Improving ↓ | View |
| Hartford | CT | 81.1 | Grade B | 6.4 | Improving ↓ | View |
| Toms River | NJ | 81.1 | Grade B | 6.4 | Stable | View |
| Cranston | RI | 81.1 | Grade B | 6.4 | Improving ↓ | View |