Air quality in Alabama
EPA monitors report from 15 of Alabama’s 67 counties. That is the honest limit of this page: the other 52 are not measured, not clean. In 2025 the most affected monitored county was Jefferson County, with 2 days above the moderate category.
15
Counties with monitors
52
Counties without
3
Days above moderate, 2025
Summed across monitored counties
10%
Adults with asthma
Population-weighted county estimate
County by county
Monitored Alabama counties
GoodModerateUnhealthy for sensitive groupsUnhealthyVery unhealthyHazardous
| County | 90th %ile AQI | Above moderate | Max AQI | 2025 days by category |
|---|---|---|---|---|
| Jefferson County | 68 | 2 | 117 | |
| Clay County | 55 | 1 | 133 | |
| Baldwin County | 55 | 0 | 87 | |
| DeKalb County | 56 | 0 | 93 | |
| Elmore County | 46 | 0 | 64 | |
| Etowah County | 60 | 0 | 87 | |
| Lawrence County | 48 | 0 | 61 | |
| Madison County | 57 | 0 | 78 | |
| Mobile County | 55 | 0 | 80 | |
| Montgomery County | 57 | 0 | 90 | |
| Morgan County | 55 | 0 | 71 | |
| Russell County | 55 | 0 | 88 | |
| Shelby County | 49 | 0 | 87 | |
| Sumter County | 54 | 0 | 90 | |
| Tuscaloosa County | 56 | 0 | 93 |
EPA Air Quality System annual summaries by county, 2025. The 90th percentile AQI describes a day worse than nine out of ten, which is a steadier measure than the annual maximum a single wildfire can set.
Not measured
52 counties without a monitor
No EPA monitor reported from these counties, so there is no air quality record to publish. Their radon zone is known, and radon is measured in the building rather than the air outside it.
- Autauga County
- Barbour County
- Bibb County
- Blount County
- Bullock County
- Butler County
- Calhoun County
- Chambers County
- Cherokee County
- Chilton County
- Choctaw County
- Clarke County
- Cleburne County
- Coffee County
- Colbert County
- Conecuh County
- Coosa County
- Covington County
- Crenshaw County
- Cullman County
- Dale County
- Dallas County
- Escambia County
- Fayette County
- Franklin County
- Geneva County
- Greene County
- Hale County
- Henry County
- Houston County
- Jackson County
- Lamar County
- Lauderdale County
- Lee County
- Limestone County
- Lowndes County
- Macon County
- Marengo County
- Marion County
- Marshall County
- Monroe County
- Perry County
- Pickens County
- Pike County
- Randolph County
- St. Clair County
- Talladega County
- Tallapoosa County
- Walker County
- Washington County
- Wilcox County
- Winston County
Other states
Air quality elsewhere
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