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Alabama Radon Map and Levels by County

Alabama's counties span all three EPA radon zones. Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

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  • Share at 4+ pCi/L

    22.4%

    13.6 pts below U.S.

    Alabama
    22.4%
    U.S.
    36.0%

    13,772 tests across 61 counties, 2005 to 2014

  • Rank among states

    37 of 47

    Middle of the states

    Alabama
    22.4%
    Nebraska
    60.4%

    By share, every state pooled the same way, 2005 to 2014

  • Counties in EPA Zone 1

    13 of 67

    Some at highest potential

    Zone 1
    13
    Zone 2
    33

    Most counties sit in Zone 2; Zone 1 is the highest potential

  • Highest county

    36.0%

    Colbert County

    Colbert
    36.0%
    Baldwin
    0.0%

    Counties with 30+ tests, 2005 to 2014

Read a result for Alabama

Starts at EPA's action level

4.0pCi/L

EPA’s own thresholds; the figures are the area’s, never this home’s.

EPA’s reading of 4.0 pCi/L

At or above 4 pCi/L

  1. Under 20 to 1.9 pCi/L
  2. 2 to 4consider a fix
  3. 4 and aboveEPA says fix it

This result is at or above 4 pCi/L. EPA recommends fixing a home when the radon level is 4 pCi/L or higher. 22.4% of Alabama's reported tests reached 4 pCi/L, 2005 to 2014.

Interpret this readingWhat a fix costs

The data

Alabama, At a glance

Alabama at a glance

Predicted: EPA radon zone

67 of 67 counties classified

EPA classifies counties, not states. Of the 67 counties in Alabama with a zone, 13 are in Zone 1, 33 in Zone 2 and 21 in Zone 3.

  • Zone 1: Highest predicted potentialgreater than 4 pCi/L13 of 67 counties · 19.4%
  • Zone 2: Moderate predicted potential2 to 4 pCi/L33 of 67 counties · 49.3%
  • Zone 3: Lower predicted potentialless than 2 pCi/L21 of 67 counties · 31.3%

An EPA radon zone predicts a whole county. It is not intended to determine whether any individual home should be tested: homes with elevated levels occur in all three zones, and EPA recommends testing every home regardless of zone.

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

CDC test figures, county by county

CDC publishes Alabama's radon test figures by county: 65 of its 67 counties have one. Each one's share is in the county list.

How to read these figures

Alabama, Compared

Alabama radon figures, compared

Calculated by Radon411
Alabama, 2005 to 2014, laboratory
22.4%
of 13,772 tests at or above 4 pCi/L, pooled
Against the U.S.
−13.6points
36.0% pooled
Rank among the states
37 of 47
1 is the highest share
Counties with 30 or more tests
25
Highest
36.0%
Colbert County
Lowest
0.0%
Baldwin County

About 2 in 10 of the 13,772 tests reported for Alabama over the 2005 to 2014 laboratory totals came back at or above 4 pCi/L (22.4%, 61 counties pooled). That is 37th of 47 states with county figures for the period; Alaska (22.5%) above it and Florida (22.1%) below.

By band, 1 county at 30% to 50%, 14 counties at 15% to 30%, 9 counties at 5% to 15%, 1 county at under 5%. Its 25 counties with 30 or more tests run from 0.0% in Baldwin County to 36.0% in Colbert County; in 0 of them half or more of the reported tests reached 4 pCi/L.

EPA's 1993 map puts 13 of its 67 classified counties in Zone 1; the tests reported since bear that out at 22.4%. The national pool for the same period is 36.0%, so Alabama runs 13.6 points below the country.

Across its 4 overlapping ten-year totals, the share went from 22.4% (2005 to 2014) to 21.9% (2008 to 2017), within 2 points, with 2005 to 2014 the highest at 22.4%.

Alabama ranked among 47 states by pooled share of tests at or above 4 pCi/L, 2005 to 2014, laboratory
StateRankCountiesTestsAt or above 4 pCi/L
Nevada32 of 47168,94423.3%
Georgia33 of 4713325,27923.2%
Massachusetts34 of 4714232,75923.0%
Rhode Island35 of 47532,42723.0%
Alaska36 of 471168022.5%
Alabama37 of 476113,77222.4%
Florida38 of 476233,54222.1%
Vermont39 of 47148,58821.6%
South Carolina40 of 474621,84319.8%
Delaware41 of 4738,69117.9%
Arizona42 of 47123,04417.4%
Alabama's highest and lowest counties with 30 or more tests, by share at or above 4 pCi/L, 2005 to 2014, laboratory
CountyRankTestsAt or above 4 pCi/L
Colbert County1 of 251,03936.0%
Lauderdale County2 of 252,10326.5%
Madison County3 of 255,77725.6%
Cleburne County4 of 2511220.5%
Calhoun County5 of 2523720.3%
Blount County6 of 253119.4%
Jackson County7 of 2529918.7%
Talladega County8 of 2511918.5%
Clay County9 of 255617.9%
Franklin County10 of 2522217.6%
Baldwin County25 of 25320.0%
Cullman County24 of 251215.8%
DeKalb County23 of 25657.7%
Montgomery County22 of 251037.8%
Tuscaloosa County21 of 25559.1%
Alabama's counties with 30 or more tests, by their own share at or above 4 pCi/L, 2005 to 2014, laboratory
ShareCountiesTheir testsFor example
50% or more00None
30% to 50%11,039Colbert County
15% to 30%149,820Lauderdale County, Madison County, Cleburne County
5% to 15%92,614Lee County, Marshall County, Limestone County
Under 5%132Baldwin County
Alabama ten-year laboratory totals, pooled, against the United States
PeriodCountiesTestsAt or above 4 pCi/LUnited StatesChange from the row before
2008 to 20176512,56921.9%35.7%−0.1 points
2007 to 20166313,18822.0%35.8%Level
2006 to 20156113,46522.0%36.3%−0.3 points
2005 to 20146113,77222.4%36.0%First on file

Pooled shares: Radon411's sum of CDC's county counts for one period. CDC publishes no state or national figure.

Alabama, Counties

Alabama counties by EPA zone

Predicted

All 67 counties, grouped by the zone EPA predicts and ordered by their reported share at or above 4 pCi/L, under Alabama's map. Each county has a page of its own.

Alabama radon map by county: EPA radon zones. Map of Alabama's 67 counties shaded by EPA radon zone: Zone 1 in red-orange, Zone 2 in amber, Zone 3 in pale sand. 13 in Zone 1, 33 in Zone 2, 21 in Zone 3.
Alabama radon map by countyEPA radon zones for Alabama's counties: 13 counties in Zone 1, 33 counties in Zone 2, 21 counties in Zone 3.A prediction for each county, not a reading of any home; elevated homes occur in all three zones.

The 12 highest in Alabama, 2005 to 2014

Zone 1: highest predicted potential13

Local help

Alabama, Local resources

Local resources in Alabama

Who to ask in Alabama: its radon program, test kits and professionals.

What Alabama's program says
Phone
(334) 290-6244

What it means

Alabama, Questions

Questions about radon in Alabama

Is radon a problem in Alabama?

Of the 67 counties in Alabama that EPA's Map of Radon Zones classifies, 13 carry Zone 1 (the highest predicted potential), 33 Zone 2 and 21 Zone 3. Pooled from 61 counties, 22.4% of the 13,772 radon tests reported to CDC over the 2005 to 2014 laboratory totals were at or above 4 pCi/L, 37th of 47 states.

Which Alabama counties are in EPA radon Zone 1?

Zone 1 holds 13 counties in Alabama; the first 8 by name are Calhoun County, Clay County, Cleburne County, Colbert County, Coosa County, Franklin County, Jackson County, Lauderdale County, the rest in the county table on this page.

Which Alabama counties have the highest radon?

Colbert County 36.0% (1,039 tests) leads Alabama by the share of reported tests at or above 4 pCi/L, 2005 to 2014, laboratory, then Lauderdale County 26.5% (2,103 tests), Madison County 25.6% (5,777 tests), Cleburne County 20.5% (112 tests), Calhoun County 20.3% (237 tests).

Which EPA region is Alabama in?

Alabama is in EPA Region 4: Southeast.

Products

Alabama, Products

Testing a home in Alabama

22.4% of the 13,772 tests reported to CDC for Alabama over the 2005 to 2014 laboratory totals reached 4 pCi/L: a short-term kit (2 to 90 days) gives a first answer in days, a long-term test the year-round average. A short-term kit (2 to 90 days) is the quick first check for a home in Alabama; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Alabama homes, compared

Explore

Cities in Alabama with their own page

Radon data is published by county, not by city. Each city page sets the figures of the counties the city lies in side by side.