Skip to content
lung.com

Radon zones in Alabama

The EPA assigns every county in Alabama to one of three radon potential zones. 13 are in Zone 1, the highest category, home to about 23% of the state's residents.

67
Counties
13
Zone 1 counties
Predicted average above 4 pCi/L
33
Zone 2 counties
Predicted average 2-4 pCi/L
21
Zone 3 counties
Predicted average below 2 pCi/L

The map

Radon potential across Alabama

Every county in Alabama, filled by the zone the EPA assigns it. Zones follow geology rather than county lines, so the colour usually changes where the bedrock does, not where the border is.

Zone 1 · 13Zone 2 · 33Zone 3 · 21

Hover a county · click to open it

County by county

All 67 Alabama counties

Zone 1 · > 4 pCi/LZone 2 · 2 - 4 pCi/LZone 3 · < 2 pCi/L
CountyZonePopulationCOPDSmokingLung ca. deaths
Calhoun County1116k8.9%16.3%48.9
Clay County114k10.6%18.2%48.8
Cleburne County116k9.8%17.8%47.4
Colbert County158k8.9%16.2%43.5
Coosa County110k10.6%17.8%46.2
Franklin County132k10.7%19.2%56.0
Jackson County153k10.9%19.0%53.5
Lauderdale County197k8.2%14.2%37.6
Lawrence County134k9.8%18.5%52.3
Limestone County1115k6.9%14.2%31.7
Madison County1413k5.8%11.8%31.1
Morgan County1125k8.5%16.1%42.3
Talladega County181k9.4%17.7%46.9
Autauga County260k7.4%14.5%43.8
Barbour County225k11.1%20.2%51.7
Bibb County222k10.2%19.7%45.8
Blount County260k9.1%16.6%45.9
Bullock County29,89713.0%24.7%35.1
Cherokee County226k10.7%17.5%57.5
Chilton County246k8.8%16.9%48.1
Cullman County292k9.0%16.6%42.1
Dallas County236k11.2%19.5%33.9
DeKalb County273k10.8%19.6%41.0
Elmore County290k7.5%15.1%44.4
Etowah County2103k9.8%17.8%45.7
Fayette County216k10.9%18.7%44.7
Greene County27,34113.8%22.3%45.1
Hale County215k10.3%18.9%43.9
Jefferson County2663k6.9%13.7%36.2
Lamar County214k11.1%18.8%46.5
Lee County2183k6.4%12.9%34.3
Lowndes County29,71712.3%21.6%41.2
Macon County218k8.8%15.6%35.9
Marion County229k10.8%18.5%49.0
Marshall County2101k9.0%16.6%47.7
Montgomery County2225k7.5%14.4%32.2
Perry County27,73812.9%21.9%30.8
Pickens County219k10.0%18.7%34.2
Randolph County223k9.7%16.9%47.1
Russell County259k9.0%18.1%45.1
Shelby County2233k5.5%10.5%26.2
St. Clair County296k7.9%15.2%45.7
Sumter County212k9.3%16.3%33.6
Tuscaloosa County2237k6.6%13.6%32.1
Walker County265k10.2%18.4%52.0
Winston County224k11.8%19.6%42.6
Baldwin County3254k7.5%13.0%34.3
Butler County318k10.3%18.3%40.9
Chambers County334k9.9%17.7%38.9
Choctaw County312k11.1%18.2%38.2
Clarke County322k9.7%17.7%44.0
Coffee County356k8.6%16.6%35.9
Conecuh County311k12.6%20.5%33.8
Covington County338k10.4%17.6%46.0
Crenshaw County313k9.9%18.1%43.0
Dale County350k9.2%17.5%47.2
Escambia County337k11.4%21.2%48.0
Geneva County327k11.0%19.4%57.5
Henry County318k9.7%16.6%49.1
Houston County3108k8.9%16.0%39.4
Marengo County319k9.9%17.5%31.6
Mobile County3412k7.9%15.4%39.4
Monroe County319k11.2%19.7%38.2
Pike County333k7.8%14.9%45.0
Tallapoosa County341k9.5%16.3%41.2
Washington County315k9.5%17.3%28.1
Wilcox County39,94412.8%21.6%34.9

Zones from the EPA Map of Radon Zones. COPD and smoking are CDC PLACES model-based estimates of adult prevalence. Lung cancer death rates are age-adjusted deaths per 100,000 per year, 2019-2023, from NCI State Cancer Profiles. A dash means the source does not report a value for that county.

Highest potential

Zone 1 counties in Alabama

These 13 counties have a predicted average indoor radon screening level above the EPA action level. The EPA recommends every home in them be tested.

Other states

Radon zones elsewhere