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Radon Levels in Perry County, Alabama

EPA puts Perry County in Zone 2, its middle radon zone, and only 1 radon test from it is on file with CDC (2008 to 2017, laboratory totals). Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

  • Nearest county

    17.1%

    Autauga County, 39 miles

    Autauga
    17.1%
    Alabama
    21.9%

    Share at 4+ pCi/L, 35 tests, 2008 to 2017

  • Ground above low

    100.0%

    35.3 pts above Alabama

    Perry
    100.0%
    Alabama
    64.7%

    Share of land USGS rates moderate or high potential

  • Tests reported

    1

    Too few for a share

    Perry
    1
    Needed
    30

    2008 to 2017, laboratory

  • 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

Read a result for Perry County

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.

The data

Perry County, At a glance

Perry County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Perry 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 Perry County, 2008 to 2017, laboratory

CDC holds 1 reported test for Perry County over the 2008 to 2017 laboratory totals, a result of 3.2 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Perry County beside the counties around it is how this page reads it.

What these figures count

Only 1 test was reported to CDC for Perry County over 2008 to 2017 (laboratory totals), and tests are often run on homes being sold or already suspected of a problem: so few describe neither the county nor 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

Perry County, Compared

Perry County radon figures, compared

Calculated by Radon411

CDC's largest figure for Perry County rests on 1 test over the 2008 to 2017 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 100.0 points and no rank or comparison is drawn from it. Results reached as high as 3.2 pCi/L, with a middle value of 3.2 pCi/L.

The nearest counties with a figure are Autauga County (39 miles away) at 17.1%, Tuscaloosa County (47 miles away) at 8.5% and Shelby County (57 miles away) at 11.3%. Pooled across 65 Alabama counties, 21.9% of reported tests reached that level; across every county in the country with a figure, 35.7%.

Statewide for the same period, Colbert County reported the highest share (36.2%) and Baldwin County the lowest (0.0%). EPA's 1993 map puts Perry County in Zone 2, its middle label: a predicted county average between 2 and 4 pCi/L. USGS geology rates 100% of the county's land moderate radon potential.

Alabama, the United States and the counties around Perry County, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedian
Alabama, pooled65 counties, pooled12,56921.9%Not pooled
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled
Colbert Countyhighest in the state87136.2%2.7 pCi/L
Baldwin Countylowest in the state310.0%1.0 pCi/L
Marengo County, ALborders it250.0%9.3 pCi/L
Hale County, ALborders it1050.0%3.9 pCi/L
Bibb County, ALborders it425.0%2.5 pCi/L
Chilton County, ALborders it1811.1%1.1 pCi/L
Dallas County, ALborders it60.0%0.5 pCi/L
The nearest Alabama counties to Perry County with 30 or more tests, 2008 to 2017, laboratory
CountyDistanceTestsAt or above 4 pCi/LMedian
Autauga County39 mi3517.1%0.9 pCi/L
Tuscaloosa County47 mi828.5%1.4 pCi/L
Shelby County57 mi37311.3%1.3 pCi/L
Elmore County67 mi3622.2%1.2 pCi/L
Jefferson County67 mi91210.7%1.2 pCi/L
Montgomery County70 mi1039.7%0.9 pCi/L
Talladega County83 mi12418.5%1.6 pCi/L
St. Clair County93 mi9314.0%1.2 pCi/L
Perry County ten-year laboratory totals, against Alabama's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestAlabama, pooledChange from the row before
2008 to 201710.0%3.2 pCi/L3.2 pCi/L21.9%Level
2007 to 201610.0%3.2 pCi/L3.2 pCi/L22.0%Level
2006 to 201510.0%3.2 pCi/L3.2 pCi/L22.0%Level
2005 to 201410.0%3.2 pCi/L3.2 pCi/L22.4%First on file

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

Perry County, Geology

The ground under Perry County

Predicted

USGS's geologic map puts all of Perry 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 Perry 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.

Perry County beside the ground around it

Across Alabama 14.3% of the land is rated high; none of Perry 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: Perry County, the 5 counties bordering it and Alabama
AreaEPA zoneLow potentialModerate potentialHigh potential
Perry CountyZone 2None100%None
Dallas CountyZone 21.8%98.2%None
Hale CountyZone 2None100%None
Bibb CountyZone 2None100%None
Marengo CountyZone 360.2%39.8%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

Perry County, Questions

Questions about radon in Perry County

Are radon levels high in Perry County?

Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Perry County, Alabama were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.2 pCi/L. Of the 8 nearest counties with a figure, within 93 miles, the share of tests at or above 4 pCi/L runs from 8.5% to 22.2%.

Which counties border Perry County?

Perry County borders 5 counties: Dallas County, Hale County, Bibb County, Marengo County and Chilton County.

Products

Perry County, Products

Testing a home in Perry County

No CDC figure names Perry County; the nearest county with one, Autauga County (39 miles away), reported 17.1% of its tests at or above 4 pCi/L over the 2008 to 2017 laboratory totals, the only reading nearby until a test of this home. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Perry County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Perry County homes, compared

Explore

Perry County, Bordering counties

Counties bordering Perry County

Calculated by Radon411

Perry County, Cities and towns

Cities and towns in Perry County

Perry County has been losing residents: from 8,455 in 2020 to 7,425 on July 1, 2025, a fall of 12.2% by the Census Bureau's estimates. That works out to 10 people per square mile of land. Its largest town, Marion, has 2,602 residents, 35.0% of the total. Together its 2 incorporated places hold 60.3% of those residents; the other 39.7% live outside any of them. Reported testing is thin here: 1 test over 2008 to 2017, or 0.1 for every 1,000 residents (2025 estimate), where Alabama as a whole comes to 2.4.

From Marion to Uniontown, CDC publishes no figure by town: each reads Perry County's.

The cities and towns in Perry County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Marion2,602−17.4%35.0%
Uniontown1,873−10.6%25.2%

2 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).

Perry County, Homes

Homes in Perry County

Mobile homes are 30% of Perry County's 3,961 homes and detached houses 53%, against 69% across Alabama. Half of its homes were built before 1985, close to Alabama's 1985: 21% date from before 1960 and 19% from 2000 or later. 69% 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 Perry County, Alabama, 2019 to 2023
HomesPerry CountyAlabama
Housing units3,9612,316,192
Detached houses53%69%
In buildings of 5 or more2%12%
Mobile homes30%13%
Built before 196021%16%
Built since 200019%27%
Middle year built19851985
Owner-occupied69%70%

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