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Radon Levels in Monroe County, Alabama

EPA puts Monroe County in Zone 3, its lowest radon zone, and only 2 radon tests from it are 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

  • Highest bordering

    0.0%

    Baldwin County

    Baldwin
    0.0%

    1 of 6 neighbours have 30+ tests, 2008 to 2017

  • Nearest county

    0.0%

    Baldwin County, 62 miles

    Baldwin
    0.0%
    Alabama
    21.9%

    Share at 4+ pCi/L, 31 tests, 2008 to 2017

  • Ground above low

    None

    64.7 pts below Alabama

    Monroe
    0.0%
    Alabama
    64.7%

    Share of land USGS rates moderate or high potential

  • Tests reported

    2

    Too few for a share

    Monroe
    2
    Needed
    30

    2008 to 2017, laboratory

  • EPA radon zone

    Zone 3

    Lower potential

    1. 1
    2. 2
    3. Zone 3

    1 highest, 3 lowest

    EPA predicts under 2 pCi/L indoors

Read a result for Monroe 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

Monroe County, At a glance

Monroe County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

is EPA's lowest class, and its forecast for Monroe County as a whole is an average indoor of less than 2 pCi/L (less than 75 Bq/m³). A low zone clears no address in it: homes above EPA's turn up in all three zones.

USGS geologic potential: Low across 100% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

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

CDC holds 2 reported tests for Monroe County over the 2008 to 2017 laboratory totals, with a median of 0.2 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Monroe County beside the counties around it is how this page reads it.

What these figures count

Only 2 tests were reported to CDC for Monroe 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

Monroe County, Compared

Monroe County radon figures, compared

Calculated by Radon411

CDC's largest figure for Monroe County rests on 2 tests over the 2008 to 2017 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 50.0 points and no rank or comparison is drawn from it. Results reached as high as 0.2 pCi/L, with a middle value of 0.2 pCi/L.

Baldwin County, the one bordering county with a figure over the 2008 to 2017 laboratory totals, reported 0.0% of its tests at or above 4 pCi/L. Farther out, Mobile County (73 miles away) at 3.8%, Autauga County (79 miles away) at 17.1% and Montgomery County (81 miles away) at 9.7% have figures too. 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 Monroe County in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 100% of the county's land low radon potential.

Alabama, the United States and the counties around Monroe 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
Mobile Countylowest in the state523.8%0.5 pCi/L
Butler County, ALborders it10.0%0.9 pCi/L
Baldwin County, ALborders it310.0%1.0 pCi/L
Conecuh County, ALborders it20.0%0.6 pCi/L
Clarke County, ALborders it10.0%0.4 pCi/L
Escambia County, ALborders it20.0%1.2 pCi/L
The nearest Alabama counties to Monroe County with 30 or more tests, 2008 to 2017, laboratory
CountyDistanceTestsAt or above 4 pCi/LMedian
Baldwin County62 mi310.0%1.0 pCi/L
Mobile County73 mi523.8%0.5 pCi/L
Autauga County79 mi3517.1%0.9 pCi/L
Montgomery County81 mi1039.7%0.9 pCi/L
Elmore County100 mi3622.2%1.2 pCi/L
Tuscaloosa County119 mi828.5%1.4 pCi/L
Shelby County124 mi37311.3%1.3 pCi/L
Lee County138 mi8112.3%1.3 pCi/L
Monroe County ten-year laboratory totals, against Alabama's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestAlabama, pooledChange from the row before
2008 to 201720.0%0.2 pCi/L0.2 pCi/L21.9%Level
2007 to 201620.0%0.2 pCi/L0.2 pCi/L22.0%Level
2006 to 201520.0%0.2 pCi/L0.2 pCi/L22.0%Level
2005 to 201420.0%0.2 pCi/L0.2 pCi/L22.4%First on file

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

Monroe County, Geology

The ground under Monroe County

Predicted

USGS's geologic map puts all of Monroe County's mapped land in one class: low radon potential. 99.0% of it lies in the area the map calls Coastal Plain, to which USGS gives a radon index of 7, in the low band (5 to 8).

USGS's geologic areas under Monroe County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Coastal PlainMarly sandy clay, chalk, and glauconitic sands.Low799.0%
Jackson PrairiesSand, marl, clay, and limestone.Low81.0%

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

Monroe County beside the ground around it

Across Alabama 14.3% of the land is rated high; none of Monroe County's is. Of the 6 counties that border it, 2 have more moderate-potential ground, Wilcox County the most at 16.3%.

Share of land by USGS radon potential: Monroe County, the 6 counties bordering it and Alabama
AreaEPA zoneLow potentialModerate potentialHigh potential
Monroe CountyZone 3100%NoneNone
Clarke CountyZone 3100%NoneNone
Conecuh CountyZone 3100%NoneNone
Escambia CountyZone 3100%NoneNone
Wilcox CountyZone 383.7%16.3%None
Butler CountyZone 397.5%2.5%None
Baldwin CountyZone 397.5%NoneNone
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

Monroe County, Questions

Questions about radon in Monroe County

Are radon levels high in Monroe County?

Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Monroe County, Alabama were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.2 pCi/L. Baldwin County, the one bordering county with a figure over the 2008 to 2017 laboratory totals, reported 0.0% of its tests at or above 4 pCi/L.

Which counties border Monroe County?

Monroe County borders 6 counties: Clarke County, Conecuh County, Escambia County, Wilcox County, Butler County and Baldwin County.

Products

Monroe County, Products

Testing a home in Monroe County

No CDC figure names Monroe County; the nearest county with one, Baldwin County (62 miles away), reported 0.0% 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. Zone 3 is the lowest label, yet homes at or above 4 pCi/L occur in every zone: a short-term kit (2 to 90 days) is the quick first check in Monroe County.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Monroe County homes, compared

Explore

Monroe County, Bordering counties

Counties bordering Monroe County

Calculated by Radon411

Monroe County, Cities and towns

Cities and towns in Monroe County

About 18,965 people live in Monroe County by the Census Bureau's estimate for July 1, 2025, 742 fewer than in 2020 (−3.8%). That works out to 18 people per square mile of land. Its largest town, Monroeville, has 5,758 residents, 30.4% of the total. Together its 5 incorporated places hold 41.1% of those residents; the other 58.9% live outside any of them. Reported testing is thin here: 2 tests over 2008 to 2017, or 0.1 for every 1,000 residents (2025 estimate), where Alabama as a whole comes to 2.4.

From Monroeville to Beatrice, CDC publishes no figure by town: each reads Monroe County's.

The cities and towns in Monroe County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Monroeville5,758−3.4%30.4%
Frisco City1,089−6.4%5.7%
Excel539−5.3%2.8%
Vredenburgh212−4.5%1.1%
Beatrice194−4.9%1.0%

5 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).

Monroe County, Homes

Homes in Monroe County

Of Monroe County's 10,193 homes, 67% are detached houses, against 69% across Alabama; 22% are mobile homes. Half of its homes were built before 1983, close to Alabama's 1985: 13% date from before 1960 and 17% from 2000 or later. 70% 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 Monroe County, Alabama, 2019 to 2023
HomesMonroe CountyAlabama
Housing units10,1932,316,192
Detached houses67%69%
In buildings of 5 or more4%12%
Mobile homes22%13%
Built before 196013%16%
Built since 200017%27%
Middle year built19831985
Owner-occupied70%70%

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