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.

CountyPredicted basementUpstairsGradeEPA zoneZIPs
Clay County2.9 pCi/L1.5ModerateEPA Zone 14
Jackson County2.6 pCi/L1.4ModerateEPA Zone 117
Colbert County2.5 pCi/L2.0ModerateEPA Zone 15
Cleburne County2.5 pCi/L1.4ModerateEPA Zone 15
Lauderdale County2.4 pCi/L1.7ModerateEPA Zone 18
Lawrence County2.4 pCi/L1.4ModerateEPA Zone 17
Limestone County2.3 pCi/L1.4ModerateEPA Zone 18
Franklin County2.3 pCi/L1.3ModerateEPA Zone 17
Talladega County2.3 pCi/L1.2ModerateEPA Zone 18
Madison County2.3 pCi/L1.8ModerateEPA Zone 121
Blount County2.2 pCi/L1.2ModerateEPA Zone 27
DeKalb County2.2 pCi/L1.0ModerateEPA Zone 215
Morgan County2.2 pCi/L1.4ModerateEPA Zone 18
Calhoun County2.1 pCi/L1.3ModerateEPA Zone 110
Marshall County2.1 pCi/L1.1ModerateEPA Zone 29
Coosa County2.0 pCi/L1.0ModerateEPA Zone 15
St. Clair County2.0 pCi/L1.1ModerateEPA Zone 210
Cherokee County2.0 pCi/L1.0LowEPA Zone 25
Cullman County2.0 pCi/L1.1LowEPA Zone 211
Etowah County2.0 pCi/L1.1LowEPA Zone 210
Randolph County2.0 pCi/L1.0LowEPA Zone 25
Winston County2.0 pCi/L1.0LowEPA Zone 26
Marion County1.9 pCi/L1.0LowEPA Zone 26
Shelby County1.8 pCi/L1.1LowEPA Zone 216
Tallapoosa County1.8 pCi/L0.9LowEPA Zone 35
Walker County1.8 pCi/L1.0LowEPA Zone 211
Chambers County1.8 pCi/L1.0LowEPA Zone 36
Chilton County1.8 pCi/L0.8LowEPA Zone 28
Fayette County1.8 pCi/L0.9LowEPA Zone 25
Bullock County1.7 pCi/L1.0LowEPA Zone 22
Jefferson County1.7 pCi/L1.1LowEPA Zone 248
Bibb County1.7 pCi/L0.9LowEPA Zone 27
Lee County1.6 pCi/L0.9LowEPA Zone 27
Pickens County1.6 pCi/L0.9LowEPA Zone 25
Hale County1.6 pCi/L0.9LowEPA Zone 24
Elmore County1.6 pCi/L0.9LowEPA Zone 29
Tuscaloosa County1.6 pCi/L0.9LowEPA Zone 217
Barbour County1.6 pCi/L1.0LowEPA Zone 25
Lowndes County1.6 pCi/L1.0LowEPA Zone 26
Russell County1.6 pCi/L0.8LowEPA Zone 27
Butler County1.6 pCi/L1.0LowEPA Zone 33
Autauga County1.5 pCi/L0.9LowEPA Zone 26
Crenshaw County1.5 pCi/L1.0LowEPA Zone 36
Dallas County1.5 pCi/L0.9LowEPA Zone 27
Lamar County1.5 pCi/L0.8LowEPA Zone 25
Clarke County1.5 pCi/L0.9LowEPA Zone 39
Pike County1.5 pCi/L0.9LowEPA Zone 36
Sumter County1.5 pCi/L0.9LowEPA Zone 26
Conecuh County1.5 pCi/L0.9LowEPA Zone 36
Henry County1.5 pCi/L1.0LowEPA Zone 36
Macon County1.5 pCi/L0.9LowEPA Zone 26
Marengo County1.5 pCi/L0.9LowEPA Zone 38
Coffee County1.5 pCi/L0.9LowEPA Zone 35
Montgomery County1.5 pCi/L1.0LowEPA Zone 216
Perry County1.5 pCi/L0.8LowEPA Zone 23
Covington County1.5 pCi/L0.9LowEPA Zone 38
Baldwin County1.5 pCi/L0.9LowEPA Zone 320
Dale County1.4 pCi/L0.9LowEPA Zone 36
Geneva County1.4 pCi/L1.0LowEPA Zone 37
Greene County1.4 pCi/L0.8LowEPA Zone 24
Monroe County1.4 pCi/L0.9LowEPA Zone 37
Washington County1.4 pCi/L0.8LowEPA Zone 311
Choctaw County1.4 pCi/L0.8LowEPA Zone 39
Houston County1.4 pCi/L1.0LowEPA Zone 310
Escambia County1.4 pCi/L0.7LowEPA Zone 33
Wilcox County1.4 pCi/L0.8LowEPA Zone 37
Mobile County1.3 pCi/L0.8LowEPA Zone 332

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.