Radon levels in Alabama: Low
The model predicts a population-weighted basement average of 1.8 pCi/L across Alabama's 67 counties - close to the US average of 1.8 pCi/L. Above-ground floors average 1.1 pCi/L.
Predicted (model estimate). The pCi/L figures on this page are long-term area averages from a peer-reviewed national model built on millions of real radon tests (2001-2021). They describe the typical home in this area - not your home, which can be several times higher or lower. The EPA radon zone is a separate, 1993 county-level classification. How the numbers work.
13 / 67
EPA Zone 1 counties (19%)
33 / 21
Zone 2 / Zone 3 counties
0
counties predicted ≥ 4 pCi/L
0%
of ZIP codes predicted ≥ 4 pCi/L
Alabama counties by predicted radon
Sorted highest to lowest predicted basement average. 67 counties.
| County | Predicted basement | Upstairs | Grade | EPA zone | ZIPs |
|---|---|---|---|---|---|
| Clay County | 2.9 pCi/L | 1.5 | Moderate | EPA Zone 1 | 4 |
| Jackson County | 2.6 pCi/L | 1.4 | Moderate | EPA Zone 1 | 17 |
| Colbert County | 2.5 pCi/L | 2.0 | Moderate | EPA Zone 1 | 5 |
| Cleburne County | 2.5 pCi/L | 1.4 | Moderate | EPA Zone 1 | 5 |
| Lauderdale County | 2.4 pCi/L | 1.7 | Moderate | EPA Zone 1 | 8 |
| Lawrence County | 2.4 pCi/L | 1.4 | Moderate | EPA Zone 1 | 7 |
| Limestone County | 2.3 pCi/L | 1.4 | Moderate | EPA Zone 1 | 8 |
| Franklin County | 2.3 pCi/L | 1.3 | Moderate | EPA Zone 1 | 7 |
| Talladega County | 2.3 pCi/L | 1.2 | Moderate | EPA Zone 1 | 8 |
| Madison County | 2.3 pCi/L | 1.8 | Moderate | EPA Zone 1 | 21 |
| Blount County | 2.2 pCi/L | 1.2 | Moderate | EPA Zone 2 | 7 |
| DeKalb County | 2.2 pCi/L | 1.0 | Moderate | EPA Zone 2 | 15 |
| Morgan County | 2.2 pCi/L | 1.4 | Moderate | EPA Zone 1 | 8 |
| Calhoun County | 2.1 pCi/L | 1.3 | Moderate | EPA Zone 1 | 10 |
| Marshall County | 2.1 pCi/L | 1.1 | Moderate | EPA Zone 2 | 9 |
| Coosa County | 2.0 pCi/L | 1.0 | Moderate | EPA Zone 1 | 5 |
| St. Clair County | 2.0 pCi/L | 1.1 | Moderate | EPA Zone 2 | 10 |
| Cherokee County | 2.0 pCi/L | 1.0 | Low | EPA Zone 2 | 5 |
| Cullman County | 2.0 pCi/L | 1.1 | Low | EPA Zone 2 | 11 |
| Etowah County | 2.0 pCi/L | 1.1 | Low | EPA Zone 2 | 10 |
| Randolph County | 2.0 pCi/L | 1.0 | Low | EPA Zone 2 | 5 |
| Winston County | 2.0 pCi/L | 1.0 | Low | EPA Zone 2 | 6 |
| Marion County | 1.9 pCi/L | 1.0 | Low | EPA Zone 2 | 6 |
| Shelby County | 1.8 pCi/L | 1.1 | Low | EPA Zone 2 | 16 |
| Tallapoosa County | 1.8 pCi/L | 0.9 | Low | EPA Zone 3 | 5 |
| Walker County | 1.8 pCi/L | 1.0 | Low | EPA Zone 2 | 11 |
| Chambers County | 1.8 pCi/L | 1.0 | Low | EPA Zone 3 | 6 |
| Chilton County | 1.8 pCi/L | 0.8 | Low | EPA Zone 2 | 8 |
| Fayette County | 1.8 pCi/L | 0.9 | Low | EPA Zone 2 | 5 |
| Bullock County | 1.7 pCi/L | 1.0 | Low | EPA Zone 2 | 2 |
| Jefferson County | 1.7 pCi/L | 1.1 | Low | EPA Zone 2 | 48 |
| Bibb County | 1.7 pCi/L | 0.9 | Low | EPA Zone 2 | 7 |
| Lee County | 1.6 pCi/L | 0.9 | Low | EPA Zone 2 | 7 |
| Pickens County | 1.6 pCi/L | 0.9 | Low | EPA Zone 2 | 5 |
| Hale County | 1.6 pCi/L | 0.9 | Low | EPA Zone 2 | 4 |
| Elmore County | 1.6 pCi/L | 0.9 | Low | EPA Zone 2 | 9 |
| Tuscaloosa County | 1.6 pCi/L | 0.9 | Low | EPA Zone 2 | 17 |
| Barbour County | 1.6 pCi/L | 1.0 | Low | EPA Zone 2 | 5 |
| Lowndes County | 1.6 pCi/L | 1.0 | Low | EPA Zone 2 | 6 |
| Russell County | 1.6 pCi/L | 0.8 | Low | EPA Zone 2 | 7 |
| Butler County | 1.6 pCi/L | 1.0 | Low | EPA Zone 3 | 3 |
| Autauga County | 1.5 pCi/L | 0.9 | Low | EPA Zone 2 | 6 |
| Crenshaw County | 1.5 pCi/L | 1.0 | Low | EPA Zone 3 | 6 |
| Dallas County | 1.5 pCi/L | 0.9 | Low | EPA Zone 2 | 7 |
| Lamar County | 1.5 pCi/L | 0.8 | Low | EPA Zone 2 | 5 |
| Clarke County | 1.5 pCi/L | 0.9 | Low | EPA Zone 3 | 9 |
| Pike County | 1.5 pCi/L | 0.9 | Low | EPA Zone 3 | 6 |
| Sumter County | 1.5 pCi/L | 0.9 | Low | EPA Zone 2 | 6 |
| Conecuh County | 1.5 pCi/L | 0.9 | Low | EPA Zone 3 | 6 |
| Henry County | 1.5 pCi/L | 1.0 | Low | EPA Zone 3 | 6 |
| Macon County | 1.5 pCi/L | 0.9 | Low | EPA Zone 2 | 6 |
| Marengo County | 1.5 pCi/L | 0.9 | Low | EPA Zone 3 | 8 |
| Coffee County | 1.5 pCi/L | 0.9 | Low | EPA Zone 3 | 5 |
| Montgomery County | 1.5 pCi/L | 1.0 | Low | EPA Zone 2 | 16 |
| Perry County | 1.5 pCi/L | 0.8 | Low | EPA Zone 2 | 3 |
| Covington County | 1.5 pCi/L | 0.9 | Low | EPA Zone 3 | 8 |
| Baldwin County | 1.5 pCi/L | 0.9 | Low | EPA Zone 3 | 20 |
| Dale County | 1.4 pCi/L | 0.9 | Low | EPA Zone 3 | 6 |
| Geneva County | 1.4 pCi/L | 1.0 | Low | EPA Zone 3 | 7 |
| Greene County | 1.4 pCi/L | 0.8 | Low | EPA Zone 2 | 4 |
| Monroe County | 1.4 pCi/L | 0.9 | Low | EPA Zone 3 | 7 |
| Washington County | 1.4 pCi/L | 0.8 | Low | EPA Zone 3 | 11 |
| Choctaw County | 1.4 pCi/L | 0.8 | Low | EPA Zone 3 | 9 |
| Houston County | 1.4 pCi/L | 1.0 | Low | EPA Zone 3 | 10 |
| Escambia County | 1.4 pCi/L | 0.7 | Low | EPA Zone 3 | 3 |
| Wilcox County | 1.4 pCi/L | 0.8 | Low | EPA Zone 3 | 7 |
| Mobile County | 1.3 pCi/L | 0.8 | Low | EPA Zone 3 | 32 |
Alabama radon questions
- Is radon high in Alabama?
- Alabama's population-weighted predicted basement average is 1.8 pCi/L, close to the US average of 1.8. 0 of its 67 modeled counties are predicted at or above the EPA action level of 4 pCi/L, 17 are in the 2-4 "consider fixing" range and 50 are below 2. 0% of Alabama ZIP codes are predicted at 4 or higher.
- Which Alabama county has the highest radon?
- Clay County has the highest predicted basement average in Alabama at 2.9 pCi/L (EPA Zone 1). The lowest is Mobile County at 1.3 pCi/L. These are modeled area averages; individual homes in any county can test far higher.
- How many EPA Zone 1 counties are in Alabama?
- 13 of Alabama's 67 counties (19%) are EPA Zone 1 (highest potential), 33 are Zone 2 and 21 are Zone 3. The EPA zone map dates from 1993; the predicted values on this page come from a 2001-2021 model built on millions of actual tests, so the two can disagree for a given county.
- Should I test for radon in Alabama?
- Yes. Even though Alabama's predicted average is below 2 pCi/L, the EPA recommends every home be tested - radon varies house to house, and 25.7% of Alabama ZIP codes are still predicted at 2 pCi/L or higher.
Alabama radon program
Many states offer free or discounted test kits and keep lists of certified mitigators. Find the Alabama radon office through the EPA state radon contacts page. Then read how to test and what mitigation costs.