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Radon Levels in Autauga County, Alabama

EPA puts Autauga County in Zone 2, its middle radon zone, and 17.1% of its 35 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

    17.1%

    4.8 pts below AL

    Autauga
    17.1%
    Alabama
    21.9%

    35 tests, 2008 to 2017

  • Median result

    0.9pCi/L

    Below action level

    Autauga
    0.9 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    35

    26th of 27 by tests

    Autauga
    35
    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

    12 of 27

    Middle half

    Autauga
    17.1%
    Colbert
    36.2%

    By share, of 27 with 30+ tests

Read a result for Autauga County

Starts at Autauga County's median, 0.9 pCi/L

0.9pCi/L

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

EPA’s reading of 0.9 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. Autauga County's median reported result, 2008 to 2017.

The data

Autauga County, At a glance

Autauga County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Autauga 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 100% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

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

Reported results by concentration band, Autauga County, 2008 to 2017, laboratory
Under 2 pCi/L: 80%2 to 4 pCi/L: 3%4 pCi/L and above: 17%

Of 35 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Autauga County, 2008 to 2017, laboratory: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L2880.0%
2 to 4 pCi/L12.9%
4 pCi/L and above617.1%
What these figures count

These are the 35 tests reported to CDC for Autauga 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

Autauga County, Compared

Autauga County radon figures, compared

Calculated by Radon411

Autauga County's 35 reported tests over the 2008 to 2017 laboratory totals had a middle value of 0.9 pCi/L and a maximum of 6.9 pCi/L, and 17.1% reached 4 pCi/L. Alabama as a whole (65 Alabama counties, pooled) comes to 21.9%: 4.8 points higher than here.

Among its state's counties it ranks 12th 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, 28 tests (80.0%) came in under 2 pCi/L, against 54.3% statewide, and 1 tests (2.9%) fell between 2 and 4, against 23.8% statewide. CDC's ten-year totals for Autauga County went from 37 tests (2005 to 2014) to 35 (2008 to 2017), the share going from 16.2% to 17.1%.

EPA's 1993 zone map puts Autauga County in Zone 2, a predicted county average between 2 and 4 pCi/L. USGS geology rates 100% of the county's land moderate radon potential.

Next door, the shares run from 9.7% in Montgomery County to 22.2% in Elmore County, with Montgomery County below Autauga County.

Autauga County against Alabama, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Autauga County
Autauga County3517.1%0.9 pCi/LThis county
Alabama, pooled65 counties, pooled12,56921.9%Not pooled+4.8 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled+18.6 points
Colbert Countyhighest in the state87136.2%2.7 pCi/L+19.1 points
Baldwin Countylowest in the state310.0%1.0 pCi/L−17.1 points
Elmore County, ALborders it3622.2%1.2 pCi/L+5.1 points
Chilton County, ALborders it1811.1%1.1 pCi/L−6.0 points
Montgomery County, ALborders it1039.7%0.9 pCi/L−7.4 points
Lowndes County, ALborders it20.0%0.9 pCi/L−17.1 points
Dallas County, ALborders it60.0%0.5 pCi/L−17.1 points
Where Autauga County's reported results fell, 2008 to 2017, laboratory, beside Alabama and the United States
ResultAutauga County testsAutauga County shareAlabama shareU.S. shareAgainst Alabama
Under 2 pCi/L2880.0%54.3%39.6%+25.7 points
2 to 4 pCi/L12.9%23.8%24.7%−20.9 points
4 pCi/L and above617.1%21.9%35.7%−4.8 points
Autauga 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
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
Autauga County12 of 273517.1%0.9 pCi/L
Lawrence County13 of 2715416.2%1.7 pCi/L
Marshall County14 of 2719915.1%1.3 pCi/L
Morgan County15 of 2745314.6%1.4 pCi/L
St. Clair County16 of 279314.0%1.2 pCi/L
Blount County17 of 274413.6%2.0 pCi/L
Autauga County ten-year laboratory totals, against Alabama's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestAlabama, pooledChange from the row before
2008 to 20173517.1%0.9 pCi/L6.9 pCi/L21.9%+1.3 points
2007 to 20163815.8%0.9 pCi/L6.9 pCi/L22.0%+3.0 points
2006 to 20153912.8%0.9 pCi/L6.9 pCi/L22.0%−3.4 points
2005 to 20143716.2%0.9 pCi/L6.9 pCi/L22.4%First on file

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

Autauga County, Geology

The ground under Autauga County

Predicted

USGS's geologic map puts all of Autauga County's mapped land in one class: moderate radon potential. All of it lies in the area the map calls Inner Coastal Plain, to which USGS gives a radon index of 10, in the moderate band (9 to 11).

USGS's geologic areas under Autauga County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Inner Coastal PlainMarly sandy clay, chalk, and glauconitic sands.Moderate10100%

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

Autauga County beside the ground around it

Across Alabama 14.3% of the land is rated high; none of Autauga County's is. Of the 5 counties that border it, 1 has more high-potential ground, Chilton County the most at 36.7%.

Share of land by USGS radon potential: Autauga County, the 5 counties bordering it and Alabama
AreaEPA zoneLow potentialModerate potentialHigh potential
Autauga CountyZone 2None100%None
Lowndes CountyZone 23.0%97.0%None
Chilton CountyZone 2None63.3%36.7%
Dallas CountyZone 21.8%98.2%None
Elmore CountyZone 29.9%90.1%None
Montgomery CountyZone 2None100%None
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

Autauga County, Questions

Questions about radon in Autauga County

Are radon levels high in Autauga County?

Over the 2008 to 2017 laboratory totals, 17.1% of the radon tests reported to CDC for Autauga County, Alabama were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.9 pCi/L. Of 27 Alabama counties with 30 or more tests for the same period, 11 reported a higher share; pooled, the state comes to 21.9%.

Which counties border Autauga County?

Autauga County borders 5 counties: Lowndes County, Chilton County, Dallas County, Elmore County and Montgomery County.

Products

Autauga County, Products

Testing a home in Autauga County

In Autauga County, 17.1% of 35 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 Autauga County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Autauga County homes, compared

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Autauga County, Bordering counties

Counties bordering Autauga County

Calculated by Radon411

Autauga County, Cities and towns

Cities and towns in Autauga County

Autauga County is growing: the Census Bureau puts it at 61,920 residents on July 1, 2025, up 5.1% from 58,914 in 2020. That works out to 104 people per square mile of land. Prattville, the largest place on its list (40,582 residents in all), extends beyond Autauga County, so no share of the total is worked out for it. Reported testing is thin here: 35 tests over 2008 to 2017, or 0.6 for every 1,000 residents (2025 estimate), where Alabama as a whole comes to 2.4.

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

The cities and towns in Autauga County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Prattvilleextends beyond Autauga County40,582+7.3%Counted whole
Millbrookextends beyond Autauga County17,623+6.4%Counted whole
Autaugaville817+4.1%1.3%
Billingsley129−0.8%0.2%

4 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 Autauga County is counted whole, so it has no share.

Autauga County, Homes

Homes in Autauga County

Of Autauga County's 24,731 homes, 74% are detached houses, against 69% across Alabama; 17% are mobile homes. Much of Autauga County is recent building: 37% of its homes have gone up since 2000 and the middle year built is 1993, against 1985 for Alabama. 75% of occupied homes are lived in by their owner (Alabama: 70%); in the rest a tenant can run a test, but a fix is the landlord's to make.

Homes in Autauga County, Alabama, 2019 to 2023
HomesAutauga CountyAlabama
Housing units24,7312,316,192
Detached houses74%69%
In buildings of 5 or more7%12%
Mobile homes17%13%
Built before 19608%16%
Built since 200037%27%
Middle year built19931985
Owner-occupied75%70%

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