Explore Air Quality by City
Your entry point to US city air quality data. Check AQI today, compare median AQI in 2021, and see unhealthy days per year for any city. 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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| City | State | Score | Grade | PM2.5 (Ann.) | Trend | |
|---|---|---|---|---|---|---|
| Newark | DE | 77.1 | Grade B | 7.1 | Stable | View |
| Iowa City | IA | 77.1 | Grade B | 7.1 | Improving β | View |
| Michigan City | IN | 77.1 | Grade B | 7.1 | Improving β | View |
| LaPorte | IN | 77.1 | Grade B | 7.1 | Improving β | View |
| La Porte | IN | 77.1 | Grade B | 7.1 | Improving β | View |
| Coralville | IA | 77.1 | Grade B | 7.1 | Improving β | View |
| Middletown | DE | 77.1 | Grade B | 7.1 | Stable | View |
| Bear | DE | 77.1 | Grade B | 7.1 | Stable | View |
| Mesa | AZ | 77 | Grade B | 7 | Worsening β | View |
| Simi Valley | CA | 77 | Grade B | 7.1 | Stable | View |
| Galveston | TX | 77 | Grade B | 7.1 | Improving β | View |
| Chandler | AZ | 77 | Grade B | 7 | Worsening β | View |
| Gilbert | AZ | 77 | Grade B | 7 | Worsening β | View |
| Santa Clarita | CA | 77 | Grade B | 7.1 | Stable | View |
| Valencia | CA | 77 | Grade B | 7.1 | Stable | View |
| Woodland Hills | CA | 77 | Grade B | 7.1 | Stable | View |
| Northridge | CA | 77 | Grade B | 7.1 | Stable | View |
| Canoga Park | CA | 77 | Grade B | 7.1 | Stable | View |
| North Hills | CA | 77 | Grade B | 7.1 | Stable | View |
| Texas City | TX | 77 | Grade B | 7.1 | Improving β | View |
| West Hills | CA | 77 | Grade B | 7.1 | Stable | View |
| Chatsworth | CA | 77 | Grade B | 7.1 | Stable | View |
| Moorpark | CA | 77 | Grade B | 7.1 | Stable | View |
| Santa Paula | CA | 77 | Grade B | 7.1 | Stable | View |
| Lake Jackson | TX | 77 | Grade B | 7.1 | Improving β | View |
| Fountain Hills | AZ | 77 | Grade B | 7 | Worsening β | View |
| Calabasas | CA | 77 | Grade B | 7.1 | Stable | View |
| Angleton | TX | 77 | Grade B | 7.1 | Improving β | View |
| Castaic | CA | 77 | Grade B | 7.1 | Stable | View |
| Stevenson Ranch | CA | 77 | Grade B | 7.1 | Stable | View |
| Northbrook | IL | 76.9 | Grade B | 7.2 | Improving β | View |
| Evanston | IL | 76.9 | Grade B | 7.2 | Improving β | View |
| Glenview | IL | 76.9 | Grade B | 7.2 | Improving β | View |
| Buffalo Grove | IL | 76.9 | Grade B | 7.2 | Improving β | View |
| Wheeling | IL | 76.9 | Grade B | 7.2 | Improving β | View |
| Highland Park | IL | 76.9 | Grade B | 7.2 | Improving β | View |
| North Chicago | IL | 76.9 | Grade B | 7.2 | Improving β | View |
| Wilmette | IL | 76.9 | Grade B | 7.2 | Improving β | View |
| Vernon Hills | IL | 76.9 | Grade B | 7.2 | Improving β | View |
| Libertyville | IL | 76.9 | Grade B | 7.2 | Improving β | View |
| Lake Forest | IL | 76.9 | Grade B | 7.2 | Improving β | View |
| Deerfield | IL | 76.9 | Grade B | 7.2 | Improving β | View |
| Cockeysville | MD | 76.8 | Grade B | 7.2 | Stable | View |
| Towson | MD | 76.8 | Grade B | 7.2 | Stable | View |
| Owings Mills | MD | 76.8 | Grade B | 7.2 | Stable | View |
| Eldersburg | MD | 76.8 | Grade B | 7.2 | Stable | View |
| Reisterstown | MD | 76.8 | Grade B | 7.2 | Stable | View |
| Hunt Valley | MD | 76.8 | Grade B | 7.2 | Stable | View |
| Westminster | MD | 76.8 | Grade B | 7.2 | Stable | View |
| Hollister | CA | 76.7 | Grade B | 7.2 | Worsening β | View |