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 | |
|---|---|---|---|---|---|---|
| Crystal Lake | IL | 74.3 | Grade B | 7.6 | Stable | View |
| Carpentersville | IL | 74.3 | Grade B | 7.6 | Stable | View |
| Orange | NJ | 74.3 | Grade B | 7.6 | Improving β | View |
| Mundelein | IL | 74.3 | Grade B | 7.6 | Stable | View |
| Algonquin | IL | 74.3 | Grade B | 7.6 | Stable | View |
| Lake in the Hills | IL | 74.3 | Grade B | 7.6 | Stable | View |
| Livingston | NJ | 74.3 | Grade B | 7.6 | Improving β | View |
| Round Lake Beach | IL | 74.3 | Grade B | 7.6 | Stable | View |
| McHenry | IL | 74.3 | Grade B | 7.6 | Stable | View |
| Huntley | IL | 74.3 | Grade B | 7.6 | Stable | View |
| Woodstock | IL | 74.3 | Grade B | 7.6 | Stable | View |
| Maplewood | NJ | 74.3 | Grade B | 7.6 | Improving β | View |
| South Elgin | IL | 74.3 | Grade B | 7.6 | Stable | View |
| Hillside | NJ | 74.3 | Grade B | 7.6 | Improving β | View |
| Chillicothe | OH | 74.3 | Grade B | 7.6 | Worsening β | View |
| Roselle | NJ | 74.3 | Grade B | 7.6 | Improving β | View |
| Grayslake | IL | 74.3 | Grade B | 7.6 | Stable | View |
| New Springville | NJ | 74.3 | Grade B | 7.6 | Improving β | View |
| Lake Zurich | IL | 74.3 | Grade B | 7.6 | Stable | View |
| Mariners Harbor | NJ | 74.3 | Grade B | 7.6 | Improving β | View |
| Round Lake | IL | 74.3 | Grade B | 7.6 | Stable | View |
| Sycamore | IL | 74.3 | Grade B | 7.6 | Stable | View |
| South Orange | NJ | 74.3 | Grade B | 7.6 | Improving β | View |
| Raleigh | NC | 74.2 | Grade B | 7.7 | Improving β | View |
| North Las Vegas | NV | 74.2 | Grade B | 7.1 | Improving β | View |
| Springfield | OH | 74.2 | Grade B | 7.7 | Improving β | View |
| West Raleigh | NC | 74.2 | Grade B | 7.7 | Improving β | View |
| Cary | NC | 74.2 | Grade B | 7.7 | Improving β | View |
| Rocky Mount | NC | 74.2 | Grade B | 7.7 | Improving β | View |
| Wilson | NC | 74.2 | Grade B | 7.7 | Improving β | View |
| Apex | NC | 74.2 | Grade B | 7.7 | Improving β | View |
| Wake Forest | NC | 74.2 | Grade B | 7.7 | Improving β | View |
| Goldsboro | NC | 74.2 | Grade B | 7.7 | Improving β | View |
| Holly Springs | NC | 74.2 | Grade B | 7.7 | Improving β | View |
| Garner | NC | 74.2 | Grade B | 7.7 | Improving β | View |
| Fuquay-Varina | NC | 74.2 | Grade B | 7.7 | Improving β | View |
| Morrisville | NC | 74.2 | Grade B | 7.7 | Improving β | View |
| Sidney | OH | 74.2 | Grade B | 7.7 | Improving β | View |
| Clayton | NC | 74.2 | Grade B | 7.7 | Improving β | View |
| Valrico | FL | 74.1 | Grade B | 7.7 | Stable | View |
| Lakeland | FL | 74.1 | Grade B | 7.7 | Stable | View |
| Brandon | FL | 74.1 | Grade B | 7.7 | Stable | View |
| Riverview | FL | 74.1 | Grade B | 7.7 | Stable | View |
| Wesley Chapel | FL | 74.1 | Grade B | 7.7 | Stable | View |
| Winter Haven | FL | 74.1 | Grade B | 7.7 | Stable | View |
| Plant City | FL | 74.1 | Grade B | 7.7 | Stable | View |
| Bloomingdale | FL | 74.1 | Grade B | 7.7 | Stable | View |
| Sun City Center | FL | 74.1 | Grade B | 7.7 | Stable | View |
| Bartow | FL | 74.1 | Grade B | 7.7 | Stable | View |
| Louisville | KY | 74 | Grade B | 7.7 | Improving β | View |