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 | |
|---|---|---|---|---|---|---|
| Queen Creek | AZ | 89.3 | Grade A | 4.5 | Stable | View |
| Northampton | MA | 89.3 | Grade A | 5 | Stable | View |
| West Linn | OR | 89.3 | Grade A | 4.8 | Improving β | View |
| Auburn | ME | 89.3 | Grade A | 4.2 | Improving β | View |
| Newberg | OR | 89.3 | Grade A | 4.8 | Improving β | View |
| Wilsonville | OR | 89.3 | Grade A | 4.8 | Improving β | View |
| Ludlow | MA | 89.3 | Grade A | 5 | Stable | View |
| Sherwood | OR | 89.3 | Grade A | 4.8 | Improving β | View |
| Amherst Center | MA | 89.3 | Grade A | 5 | Stable | View |
| South Hadley | MA | 89.3 | Grade A | 5 | Stable | View |
| Canby | OR | 89.3 | Grade A | 4.8 | Improving β | View |
| Oak Grove | OR | 89.3 | Grade A | 4.8 | Improving β | View |
| Easthampton | MA | 89.3 | Grade A | 5 | Stable | View |
| Concord | CA | 89.2 | Grade A | 3.9 | Improving β | View |
| Reno | NV | 89.2 | Grade A | 4.5 | Stable | View |
| Ellensburg | WA | 89.2 | Grade A | 4.7 | Improving β | View |
| Fairfield | CA | 89.2 | Grade A | 3.9 | Improving β | View |
| Antioch | CA | 89.2 | Grade A | 3.9 | Improving β | View |
| Pittsburg | CA | 89.2 | Grade A | 3.9 | Improving β | View |
| Walnut Creek | CA | 89.2 | Grade A | 3.9 | Improving β | View |
| Brentwood | CA | 89.2 | Grade A | 3.9 | Improving β | View |
| Danville | CA | 89.2 | Grade A | 3.9 | Improving β | View |
| Oakley | CA | 89.2 | Grade A | 3.9 | Improving β | View |
| Martinez | CA | 89.2 | Grade A | 3.9 | Improving β | View |
| Pleasant Hill | CA | 89.2 | Grade A | 3.9 | Improving β | View |
| Wenatchee | WA | 89.2 | Grade A | 4.7 | Improving β | View |
| Benicia | CA | 89.2 | Grade A | 3.9 | Improving β | View |
| Suisun | CA | 89.2 | Grade A | 3.9 | Improving β | View |
| Lafayette | CA | 89.2 | Grade A | 3.9 | Improving β | View |
| Bay Point | CA | 89.2 | Grade A | 3.9 | Improving β | View |
| Lompoc | CA | 89.1 | Grade A | 4.3 | Stable | View |
| Boulder | CO | 89.1 | Grade A | 4.8 | Improving β | View |
| Las Cruces | NM | 89.1 | Grade A | 4.3 | Stable | View |
| Hillsboro | OR | 89.1 | Grade A | 3.9 | Improving β | View |
| Pierre | SD | 89.1 | Grade A | 2.2 | Stable | View |
| Lubbock | TX | 89.1 | Grade A | 4.6 | Improving β | View |
| Cheyenne | WY | 89.1 | Grade A | 3.8 | Worsening β | View |
| Aloha | OR | 89.1 | Grade A | 3.9 | Improving β | View |
| Lafayette | CO | 89.1 | Grade A | 4.8 | Improving β | View |
| Forest Grove | OR | 89.1 | Grade A | 3.9 | Improving β | View |
| Plainview | TX | 89.1 | Grade A | 4.6 | Improving β | View |
| Bethany | OR | 89.1 | Grade A | 3.9 | Improving β | View |
| Louisville | CO | 89.1 | Grade A | 4.8 | Improving β | View |
| Lancaster | CA | 89 | Grade A | 4.8 | Improving β | View |
| Palmdale | CA | 89 | Grade A | 4.8 | Improving β | View |
| Rosamond | CA | 89 | Grade A | 4.8 | Improving β | View |
| Beltsville | MD | 88.9 | Grade A | 4.5 | Improving β | View |
| Germantown | MD | 88.9 | Grade A | 4.5 | Improving β | View |
| Silver Spring | MD | 88.9 | Grade A | 4.5 | Improving β | View |
| Frederick | MD | 88.9 | Grade A | 4.5 | Improving β | View |