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 | |
|---|---|---|---|---|---|---|
| Herriman | UT | 82.7 | Grade B | 5.8 | Worsening β | View |
| Santa Cruz | CA | 82.7 | Grade B | 6.2 | Stable | View |
| Lehi | UT | 82.7 | Grade B | 5.8 | Worsening β | View |
| Watsonville | CA | 82.7 | Grade B | 6.2 | Stable | View |
| Riverton | UT | 82.7 | Grade B | 5.8 | Worsening β | View |
| Tooele | UT | 82.7 | Grade B | 5.8 | Worsening β | View |
| American Fork | UT | 82.7 | Grade B | 5.8 | Worsening β | View |
| Eagle Mountain | UT | 82.7 | Grade B | 5.8 | Worsening β | View |
| Saratoga Springs | UT | 82.7 | Grade B | 5.8 | Worsening β | View |
| Highland | UT | 82.7 | Grade B | 5.8 | Worsening β | View |
| Edgewood | MD | 82.6 | Grade B | 5.9 | Improving β | View |
| Green Bay | WI | 82.6 | Grade B | 6.2 | Improving β | View |
| South Bel Air | MD | 82.6 | Grade B | 5.9 | Improving β | View |
| Bel Air South | MD | 82.6 | Grade B | 5.9 | Improving β | View |
| North Bel Air | MD | 82.6 | Grade B | 5.9 | Improving β | View |
| Manitowoc | WI | 82.6 | Grade B | 6.2 | Improving β | View |
| Bel Air North | MD | 82.6 | Grade B | 5.9 | Improving β | View |
| Perry Hall | MD | 82.6 | Grade B | 5.9 | Improving β | View |
| Middle River | MD | 82.6 | Grade B | 5.9 | Improving β | View |
| De Pere | WI | 82.6 | Grade B | 6.2 | Improving β | View |
| Howard | WI | 82.6 | Grade B | 6.2 | Improving β | View |
| Ashwaubenon | WI | 82.6 | Grade B | 6.2 | Improving β | View |
| Des Moines | IA | 82.5 | Grade B | 6.2 | Improving β | View |
| Las Vegas | NV | 82.5 | Grade B | 5.9 | Stable | View |
| Paradise | NV | 82.5 | Grade B | 5.9 | Stable | View |
| Ames | IA | 82.5 | Grade B | 6.2 | Improving β | View |
| West Des Moines | IA | 82.5 | Grade B | 6.2 | Improving β | View |
| Ankeny | IA | 82.5 | Grade B | 6.2 | Improving β | View |
| Urbandale | IA | 82.5 | Grade B | 6.2 | Improving β | View |
| Winchester | NV | 82.5 | Grade B | 5.9 | Stable | View |
| Marshalltown | IA | 82.5 | Grade B | 6.2 | Improving β | View |
| Johnston | IA | 82.5 | Grade B | 6.2 | Improving β | View |
| Waukee | IA | 82.5 | Grade B | 6.2 | Improving β | View |
| Altoona | IA | 82.5 | Grade B | 6.2 | Improving β | View |
| Dyersburg | TN | 82.3 | Grade B | 6.2 | Stable | View |
| Gillette | WY | 82.3 | Grade B | 5.5 | Improving β | View |
| Clearwater | FL | 82.1 | Grade B | 6.1 | Stable | View |
| St. Petersburg | FL | 82.1 | Grade B | 6.1 | Stable | View |
| Largo | FL | 82.1 | Grade B | 6.1 | Stable | View |
| Palm Harbor | FL | 82.1 | Grade B | 6.1 | Stable | View |
| Pinellas Park | FL | 82.1 | Grade B | 6.1 | Stable | View |
| Dunedin | FL | 82.1 | Grade B | 6.1 | Stable | View |
| East Lake | FL | 82.1 | Grade B | 6.1 | Stable | View |
| Tarpon Springs | FL | 82.1 | Grade B | 6.1 | Stable | View |
| Keystone | FL | 82.1 | Grade B | 6.1 | Stable | View |
| Bayonet Point | FL | 82.1 | Grade B | 6.1 | Stable | View |
| Holiday | FL | 82.1 | Grade B | 6.1 | Stable | View |
| West and East Lealman | FL | 82.1 | Grade B | 6.1 | Stable | View |
| Lealman | FL | 82.1 | Grade B | 6.1 | Stable | View |
| Jasmine Estates | FL | 82.1 | Grade B | 6.1 | Stable | View |