Radon Levels in Alabama

67 counties — 13 high risk, 33 moderate, 21 low risk

13
33
21
Zone 1 High (19.4%) Zone 2 Moderate (49.3%) Zone 3 Low (31.3%)

Alabama Radon Zone Map

Counties colored by EPA radon zone. Red = Zone 1, Orange = Zone 2, Green = Zone 3.

Highest-Risk Counties

Calhoun52.6% above action level
ClayZone 1 — High
CleburneZone 1 — High
ColbertZone 1 — High
CoosaZone 1 — High
FranklinZone 1 — High
Jackson55.6% above action level
Lauderdale41.2% above action level
LawrenceZone 1 — High
Limestone30.8% above action level
Madison34.5% above action level
Morgan40% above action level
+1 more

Check Your Alabama ZIP Code

All 67 Counties — By Radon Risk

CountyEPA ZoneTests% Above 4 pCi/L
Calhoun High 19 52.6%
Clay High — —
Cleburne High — —
Colbert High 10 —
Coosa High — —
Franklin High 4 —
Jackson High 9 55.6%
Lauderdale High 17 41.2%
Lawrence High 5 —
Limestone High 13 30.8%
Madison High 55 34.5%
Morgan High 20 40%
Talladega High 17 47.1%
Autauga Moderate 7 57.1%
Barbour Moderate 6 —
Bibb Moderate 4 —
Blount Moderate 11 45.5%
Bullock Moderate — —
Cherokee Moderate 5 —
Chilton Moderate 6 —
Cullman Moderate 15 26.7%
Dallas Moderate 10 —
DeKalb Moderate 9 —
Elmore Moderate 15 33.3%
Etowah Moderate 19 42.1%
Fayette Moderate — —
Greene Moderate — —
Hale Moderate — —
Jefferson Moderate 103 30.1%
Lamar Moderate — —
Lee Moderate 17 29.4%
Lowndes Moderate — —
Macon Moderate 4 —
Marion Moderate 5 —
Marshall Moderate 12 66.7%
Montgomery Moderate 38 28.9%
Perry Moderate — —
Pickens Moderate 5 —
Randolph Moderate 5 —
Russell Moderate 7 —
Shelby Moderate 30 20%
St. Clair Moderate 15 26.7%
Sumter Moderate — —
Tuscaloosa Moderate 26 38.5%
Walker Moderate 14 50%
Winston Moderate 6 —
Baldwin Low 45 40%
Butler Low 4 —
Chambers Low 8 —
Choctaw Low — —
Clarke Low 6 —
Coffee Low 10 —
Conecuh Low — —
Covington Low 8 —
Crenshaw Low 4 —
Dale Low 9 —
Escambia Low 7 —
Geneva Low 5 —
Henry Low 5 —
Houston Low 19 36.8%
Marengo Low 4 —
Mobile Low 69 33.3%
Monroe Low 4 —
Pike Low 6 —
Tallapoosa Low 11 —
Washington Low 4 —
Wilcox Low — —

Sources: EPA Map of Radon Zones, CDC Environmental Health Tracking Network

Frequently Asked Questions

How many counties in Alabama have high radon risk?

Alabama has 13 counties classified as EPA Zone 1 (high radon risk), 33 as Zone 2 (moderate), and 21 as Zone 3 (low risk).

Is radon a problem in Alabama?

Alabama has 13 high-risk counties where elevated radon is likely. The EPA recommends all homes in Alabama be tested for radon, regardless of which zone they're in.

How do I check radon levels for my Alabama address?

Enter your ZIP code in the search box above to see your county's EPA radon zone and available testing data. For your specific home's radon level, you'll need a radon test kit.