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 | |
|---|---|---|---|---|---|---|
| West Milford | NJ | 79.9 | Grade B | 6.6 | Improving β | View |
| Randolph | NJ | 79.9 | Grade B | 6.6 | Improving β | View |
| Ridgewood | NJ | 79.9 | Grade B | 6.6 | Improving β | View |
| Lodi | NJ | 79.9 | Grade B | 6.6 | Improving β | View |
| Mahwah | NJ | 79.9 | Grade B | 6.6 | Improving β | View |
| Kiryas Joel | NJ | 79.9 | Grade B | 6.6 | Improving β | View |
| Elmwood Park | NJ | 79.9 | Grade B | 6.6 | Improving β | View |
| Sparta | NJ | 79.9 | Grade B | 6.6 | Improving β | View |
| Hawthorne | NJ | 79.9 | Grade B | 6.6 | Improving β | View |
| North Ogden | UT | 79.9 | Grade B | 6.5 | Stable | View |
| Monsey | NJ | 79.9 | Grade B | 6.6 | Improving β | View |
| Dover | NJ | 79.9 | Grade B | 6.6 | Improving β | View |
| Nanuet | NJ | 79.9 | Grade B | 6.6 | Improving β | View |
| Wyckoff | NJ | 79.9 | Grade B | 6.6 | Improving β | View |
| San Francisco | CA | 79.7 | Grade B | 6.6 | Improving β | View |
| Denver | CO | 79.7 | Grade B | 6.6 | Improving β | View |
| Danbury | CT | 79.7 | Grade B | 6.6 | Improving β | View |
| Grand Island | NE | 79.7 | Grade B | 6.6 | Worsening β | View |
| Richmond | VA | 79.7 | Grade B | 6.7 | Improving β | View |
| Lakewood | CO | 79.7 | Grade B | 6.6 | Improving β | View |
| North Stamford | CT | 79.7 | Grade B | 6.6 | Improving β | View |
| Arvada | CO | 79.7 | Grade B | 6.6 | Improving β | View |
| Centennial | CO | 79.7 | Grade B | 6.6 | Improving β | View |
| Daly City | CA | 79.7 | Grade B | 6.6 | Improving β | View |
| San Mateo | CA | 79.7 | Grade B | 6.6 | Improving β | View |
| Chinatown | CA | 79.7 | Grade B | 6.6 | Improving β | View |
| Highlands Ranch | CO | 79.7 | Grade B | 6.6 | Improving β | View |
| South San Francisco | CA | 79.7 | Grade B | 6.6 | Improving β | View |
| Castle Rock | CO | 79.7 | Grade B | 6.6 | Improving β | View |
| Parker | CO | 79.7 | Grade B | 6.6 | Improving β | View |
| Mission District | CA | 79.7 | Grade B | 6.6 | Improving β | View |
| Littleton | CO | 79.7 | Grade B | 6.6 | Improving β | View |
| Tuckahoe | VA | 79.7 | Grade B | 6.7 | Improving β | View |
| San Bruno | CA | 79.7 | Grade B | 6.6 | Improving β | View |
| Southglenn | CO | 79.7 | Grade B | 6.6 | Improving β | View |
| Pacifica | CA | 79.7 | Grade B | 6.6 | Improving β | View |
| Mechanicsville | VA | 79.7 | Grade B | 6.7 | Improving β | View |
| Englewood | CO | 79.7 | Grade B | 6.6 | Improving β | View |
| Kearney | NE | 79.7 | Grade B | 6.6 | Worsening β | View |
| Petersburg | VA | 79.7 | Grade B | 6.7 | Improving β | View |
| Ken Caryl | CO | 79.7 | Grade B | 6.6 | Improving β | View |
| Wheat Ridge | CO | 79.7 | Grade B | 6.6 | Improving β | View |
| Burlingame | CA | 79.7 | Grade B | 6.6 | Improving β | View |
| Poughkeepsie | CT | 79.7 | Grade B | 6.6 | Improving β | View |
| San Carlos | CA | 79.7 | Grade B | 6.6 | Improving β | View |
| Newburgh | CT | 79.7 | Grade B | 6.6 | Improving β | View |
| Belmont | CA | 79.7 | Grade B | 6.6 | Improving β | View |
| Castlewood | CO | 79.7 | Grade B | 6.6 | Improving β | View |
| Hastings | NE | 79.7 | Grade B | 6.6 | Worsening β | View |
| Short Pump | VA | 79.7 | Grade B | 6.7 | Improving β | View |