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Radon Levels in Elmore County, Alabama

EPA puts Elmore County in Zone 2, its middle radon zone, and 22.2% of its 36 reported radon tests (2008 to 2017, laboratory totals) were at or above 4 pCi/L. Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

  • Share at 4+ pCi/L

    22.2%

    0.3 pts above AL

    Elmore
    22.2%
    Alabama
    21.9%

    36 tests, 2008 to 2017

  • Median result

    1.2pCi/L

    Below action level

    Elmore
    1.2 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    36

    25th of 27 by tests

    Elmore
    36
    Madison
    5,178

    Reported to CDC before any fix, 2008 to 2017

  • EPA radon zone

    Zone 2

    Moderate potential

    1. 1
    2. Zone 2
    3. 3

    1 highest, 3 lowest

    EPA predicts 2 to 4 pCi/L indoors

  • Rank in Alabama

    4 of 27

    Top quarter

    Elmore
    22.2%
    Colbert
    36.2%

    By share, of 27 with 30+ tests

Read a result for Elmore County

Starts at Elmore County's median, 1.2 pCi/L

1.2pCi/L

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

EPA’s reading of 1.2 pCi/L

Below 2 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 below 2 pCi/L, the level at which EPA says a fix should be considered. Elmore County's median reported result, 2008 to 2017.

The data

Elmore County, At a glance

Elmore County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Elmore County is a county: EPA's forecast for it as a whole is an average indoor of 2 to 4 pCi/L (75 to 150 Bq/m³). It describes no single address, and homes above EPA's are found in every zone, this one included.

USGS geologic potential: Moderate across 90% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Elmore County, 2008 to 2017, laboratory

Reported results by concentration band, Elmore County, 2008 to 2017, laboratory
Under 2 pCi/L: 72%2 to 4 pCi/L: 6%4 pCi/L and above: 22%

Of 36 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Elmore County, 2008 to 2017, laboratory: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L2672.2%
2 to 4 pCi/L25.6%
4 pCi/L and above822.2%
What these figures count

These are the 36 tests reported to CDC for Elmore County over 2008 to 2017 (laboratory totals), many from homes being sold or already suspected of a problem: they describe the county's reported tests, not this house.

Measured: CDC tracking data. Figure above: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).

How to read these figures

Elmore County, Compared

Elmore County radon figures, compared

Calculated by Radon411

Elmore County's 36 reported tests over the 2008 to 2017 laboratory totals had a middle value of 1.2 pCi/L and a maximum of 18.8 pCi/L, and 22.2% reached 4 pCi/L. Alabama as a whole (65 Alabama counties, pooled) comes to 21.9%: 0.3 points lower than here.

Among its state's counties it ranks 4th of 27 Alabama counties with 30 or more tests for the same period. Statewide for the same period, Colbert County reported the highest share (36.2%) and Baldwin County the lowest (0.0%).

Below the action level, 26 tests (72.2%) came in under 2 pCi/L, against 54.3% statewide, and 2 tests (5.6%) fell between 2 and 4, against 23.8% statewide. CDC's ten-year totals for Elmore County went from 29 tests (2005 to 2014) to 36 (2008 to 2017), the share going from 3.4% to 22.2%.

EPA's 1993 zone map puts Elmore County in Zone 2, a predicted county average between 2 and 4 pCi/L. USGS geology rates 90% of the county's land moderate radon potential.

Next door, the shares run from 9.7% in Montgomery County to 17.1% in Autauga County, with Autauga County and Montgomery County below Elmore County.

Elmore County against Alabama, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Elmore County
Elmore County3622.2%1.2 pCi/LThis county
Alabama, pooled65 counties, pooled12,56921.9%Not pooled−0.3 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled+13.5 points
Colbert Countyhighest in the state87136.2%2.7 pCi/L+14.0 points
Baldwin Countylowest in the state310.0%1.0 pCi/L−22.2 points
Macon County, ALborders it922.2%0.1 pCi/LLevel
Autauga County, ALborders it3517.1%0.9 pCi/L−5.1 points
Chilton County, ALborders it1811.1%1.1 pCi/L−11.1 points
Montgomery County, ALborders it1039.7%0.9 pCi/L−12.5 points
Tallapoosa County, ALborders it166.3%0.9 pCi/L−15.9 points
Coosa County, ALborders it90.0%1.4 pCi/L−22.2 points
Where Elmore County's reported results fell, 2008 to 2017, laboratory, beside Alabama and the United States
ResultElmore County testsElmore County shareAlabama shareU.S. shareAgainst Alabama
Under 2 pCi/L2672.2%54.3%39.6%+17.9 points
2 to 4 pCi/L25.6%23.8%24.7%−18.2 points
4 pCi/L and above822.2%21.9%35.7%+0.3 points
Elmore County ranked among the 27 Alabama counties with 30 or more tests, by share at or above 4 pCi/L, 2008 to 2017, laboratory
CountyRankTestsAt or above 4 pCi/LMedian
Colbert County1 of 2787136.2%2.7 pCi/L
Lauderdale County2 of 271,88527.2%2.2 pCi/L
Madison County3 of 275,17825.2%1.9 pCi/L
Elmore County4 of 273622.2%1.2 pCi/L
Etowah County5 of 275619.6%1.4 pCi/L
Calhoun County6 of 2723818.9%1.4 pCi/L
Cleburne County7 of 276918.8%1.5 pCi/L
Talladega County8 of 2712418.5%1.6 pCi/L
Franklin County9 of 2719318.1%1.4 pCi/L
Clay County10 of 273917.9%0.9 pCi/L
Jackson County11 of 2722317.5%1.5 pCi/L
Elmore County ten-year laboratory totals, against Alabama's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestAlabama, pooledChange from the row before
2008 to 20173622.2%1.2 pCi/L18.8 pCi/L21.9%+0.6 points
2007 to 20163721.6%1.2 pCi/L18.8 pCi/L22.0%+15.5 points
2006 to 2015336.1%1.0 pCi/L18.8 pCi/L22.0%+2.7 points
2005 to 2014293.4%1.1 pCi/L18.8 pCi/L22.4%First on file

Pooled shares: Radon411's sum of CDC's county counts for one period.

Elmore County, Geology

The ground under Elmore County

Predicted

Most of the ground under Elmore County is one class on USGS's geologic map: 90.1% of its land is moderate radon potential, with 9.9% low. The map puts 48.1% of Elmore County in the area it calls Inner Coastal Plain and 42.0% in Northern Piedmont, with one smaller area beside them. USGS gives the first a radon index of 10 and the second 9, both in the moderate band (9 to 11).

USGS's geologic areas under Elmore County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Inner Coastal PlainMarly sandy clay, chalk, and glauconitic sands.Moderate1048.1%
Northern PiedmontGraphitic schists, phyllites, and felsic gneiss.Moderate942.0%
Inner PiedmontAmphibolite, ultramafic rocks, gneiss, schist, minor granite.Low79.9%

Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.

Elmore County beside the ground around it

Across Alabama 14.3% of the land is rated high; none of Elmore County's is. Of the 6 counties that border it, 2 have more high-potential ground, Coosa County the most at 46.6%.

Share of land by USGS radon potential: Elmore County, the 6 counties bordering it and Alabama
AreaEPA zoneLow potentialModerate potentialHigh potential
Elmore CountyZone 29.9%90.1%None
Coosa CountyZone 1None53.4%46.6%
Macon CountyZone 20.1%99.9%None
Montgomery CountyZone 2None100%None
Autauga CountyZone 2None100%None
Tallapoosa CountyZone 357.3%42.7%None
Chilton CountyZone 2None63.3%36.7%
Alabama67 counties, pooled by land areaVaries35.2%50.4%14.3%

The map rates the ground, not the air in any home.

What it means

Elmore County, Questions

Questions about radon in Elmore County

Are radon levels high in Elmore County?

Over the 2008 to 2017 laboratory totals, 22.2% of the radon tests reported to CDC for Elmore County, Alabama were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.2 pCi/L. Of 27 Alabama counties with 30 or more tests for the same period, 3 reported a higher share; pooled, the state comes to 21.9%.

Which counties border Elmore County?

Elmore County borders 6 counties: Coosa County, Macon County, Montgomery County, Autauga County, Tallapoosa County and Chilton County.

Products

Elmore County, Products

Testing a home in Elmore County

In Elmore County, 22.2% of 36 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 21.9% pooled across Alabama. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Elmore County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Elmore County homes, compared

Explore

Elmore County, Bordering counties

Counties bordering Elmore County

Calculated by Radon411

Elmore County, Cities and towns

Cities and towns in Elmore County

The Census Bureau estimates 91,577 residents in Elmore County for July 1, 2025, 3,711 more than in 2020 (+4.2%). That works out to 148 people per square mile of land. Prattville, the largest place on its list (40,582 residents in all), extends beyond Elmore County, so no share of the total is worked out for it. Reported testing is thin here: 36 tests over 2008 to 2017, or 0.4 for every 1,000 residents (2025 estimate), where Alabama as a whole comes to 2.4.

From Prattville to Eclectic, CDC publishes no figure by town: each reads Elmore County's.

The cities and towns in Elmore County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Prattvilleextends beyond Elmore County40,582+7.3%Counted whole
Millbrookextends beyond Elmore County17,623+6.4%Counted whole
Wetumpka7,535+3.0%8.2%
Tallasseeextends beyond Elmore County4,738−1.1%Counted whole
Deatsville1,715+2.8%1.9%
Elmore1,382+16.7%1.5%
Coosada1,315+8.6%1.4%
Eclectic1,256+5.7%1.4%

8 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025). A place that extends beyond Elmore County is counted whole, so it has no share.

Elmore County, Homes

Homes in Elmore County

Of Elmore County's 37,085 homes, 74% are detached houses, against 69% across Alabama; 16% are mobile homes. Much of Elmore County is recent building: 41% of its homes have gone up since 2000 and the middle year built is 1995, against 1985 for Alabama. Owners live in 77% of the occupied homes (Alabama: 70%), so for most households a test and a fix are their own to order.

Homes in Elmore County, Alabama, 2019 to 2023
HomesElmore CountyAlabama
Housing units37,0852,316,192
Detached houses74%69%
In buildings of 5 or more5%12%
Mobile homes16%13%
Built before 19608%16%
Built since 200041%27%
Middle year built19951985
Owner-occupied77%70%

Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.