Skip to content

Locations and reports

Radon Levels in Coosa County, Alabama

EPA puts Coosa County in Zone 1, its highest radon zone, and only 9 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

    22.2%

    Elmore County

    Elmore
    22.2%
    Shelby
    11.3%

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

  • Nearest county

    22.2%

    Elmore County, 24 miles

    Elmore
    22.2%
    Alabama
    21.9%

    Share at 4+ pCi/L, 36 tests, 2008 to 2017

  • Ground above low

    100.0%

    35.3 pts above Alabama

    Coosa
    100.0%
    Alabama
    64.7%

    Share of land USGS rates moderate or high potential

  • Tests reported

    11

    Too few for a share

    Coosa
    11
    Needed
    30

    2005 to 2014, laboratory

  • EPA radon zone

    Zone 1

    Highest potential

    1. Zone 1
    2. 2
    3. 3

    1 highest, 3 lowest

    EPA predicts over 4 pCi/L indoors

Read a result for Coosa 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

Coosa County, At a glance

Coosa County at a glance

Predicted: EPA radon zone

EPA Zone 1: highest predicted potential

EPA puts all of Coosa County in and predicts an average indoor of greater than 4 pCi/L (greater than 150 Bq/m³) across the county. That is one forecast for the whole county, not a reading of any address in it; homes above EPA's turn up in all three zones.

USGS geologic potential: Moderate across 53% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

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

CDC holds 9 reported tests for Coosa County over the 2008 to 2017 laboratory totals, with a median of 1.4 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Coosa County beside the counties around it is how this page reads it.

What these figures count

Only 9 tests were reported to CDC for Coosa 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

Coosa County, Compared

Coosa County radon figures, compared

Calculated by Radon411

CDC's largest figure for Coosa County rests on 11 tests over the 2005 to 2014 laboratory totals, 1 of them at or above 4 pCi/L, so each test moves its share by 9.1 points and no rank or comparison is drawn from it. Results reached as high as 8.9 pCi/L, with a middle value of 1.4 pCi/L.

Of the counties bordering it, 4 have a figure over the 2008 to 2017 laboratory totals: Elmore County reported the largest share at or above 4 pCi/L, 22.2%, and Shelby County the smallest, 11.3%, with Talladega County at 18.5% and Clay County at 17.9% between. Farther out, Autauga County (36 miles away) at 17.1%, Montgomery County (49 miles away) at 9.7% and St. Clair County (54 miles away) at 14.0% 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 Coosa County in Zone 1, the map's highest label: a predicted county average above 4 pCi/L. USGS geology rates 53% of the county's land moderate radon potential.

Alabama, the United States and the counties around Coosa 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
Elmore County, ALborders it3622.2%1.2 pCi/L
Talladega County, ALborders it12418.5%1.6 pCi/L
Clay County, ALborders it3917.9%0.9 pCi/L
Shelby County, ALborders it37311.3%1.3 pCi/L
Chilton County, ALborders it1811.1%1.1 pCi/L
Tallapoosa County, ALborders it166.3%0.9 pCi/L
The nearest Alabama counties to Coosa County with 30 or more tests, 2008 to 2017, laboratory
CountyDistanceTestsAt or above 4 pCi/LMedian
Elmore County24 mi3622.2%1.2 pCi/L
Talladega County31 mi12418.5%1.6 pCi/L
Clay County32 mi3917.9%0.9 pCi/L
Shelby County33 mi37311.3%1.3 pCi/L
Autauga County36 mi3517.1%0.9 pCi/L
Montgomery County49 mi1039.7%0.9 pCi/L
St. Clair County54 mi9314.0%1.2 pCi/L
Jefferson County57 mi91210.7%1.2 pCi/L
Coosa County ten-year laboratory totals, against Alabama's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestAlabama, pooledChange from the row before
2008 to 201790.0%1.4 pCi/L3.0 pCi/L21.9%Level
2007 to 2016100.0%1.3 pCi/L3.0 pCi/L22.0%Level
2006 to 2015100.0%1.3 pCi/L3.0 pCi/L22.0%−9.1 points
2005 to 2014119.1%1.4 pCi/L8.9 pCi/L22.4%First on file

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

Coosa County, Geology

The ground under Coosa County

Predicted

USGS's geologic map splits Coosa County: 53.4% of its land is moderate radon potential and 46.6% high. The map puts 53.1% of Coosa County in the area it calls Northern Piedmont and 46.6% in Northern Piedmont. USGS gives the first a radon index of 9, in the moderate band (9 to 11), and the second 12, in the high band (12 to 17).

USGS's geologic areas under Coosa County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Northern PiedmontGraphitic schists, phyllites, and felsic gneiss.Moderate953.1%
Northern PiedmontSchist, metagraywake, phyllite, quartz diorite gneiss, amphibolite gneiss, quartz monzonite.High1246.6%

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

Coosa County beside the ground around it

Coosa County has more high-potential ground than Alabama as a whole: 46.6% of its land against 14.3%. Of the 6 counties that border it, 2 have more high-potential ground, Clay County the most at 69.6%.

Share of land by USGS radon potential: Coosa County, the 6 counties bordering it and Alabama
AreaEPA zoneLow potentialModerate potentialHigh potential
Coosa CountyZone 1None53.4%46.6%
Chilton CountyZone 2None63.3%36.7%
Elmore CountyZone 29.9%90.1%None
Tallapoosa CountyZone 357.3%42.7%None
Shelby CountyZone 2None92.0%8.0%
Talladega CountyZone 1None45.2%54.8%
Clay CountyZone 1None30.4%69.6%
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

Coosa County, Questions

Questions about radon in Coosa County

Are radon levels high in Coosa County?

Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Coosa County, Alabama were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.4 pCi/L. Of the counties bordering it, 4 have a figure over the 2008 to 2017 laboratory totals: Elmore County reported the largest share at or above 4 pCi/L, 22.2%, and Shelby County the smallest, 11.3%, with Talladega County at 18.5% and Clay County at 17.9% between.

Which counties border Coosa County?

Coosa County borders 6 counties: Chilton County, Elmore County, Tallapoosa County, Shelby County, Talladega County and Clay County.

Products

Coosa County, Products

Testing a home in Coosa County

No CDC figure names Coosa County; the nearest county with one, Elmore County (24 miles away), reported 22.2% 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 1 the year-round level in Coosa County is the one to know: a long-term test (more than 90 days) or a monitor, with a short-term kit for a first answer.

Test kits and monitors3

See every kit and monitor

Coosa County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Coosa County

Explore

Coosa County, Bordering counties

Counties bordering Coosa County

Calculated by Radon411

Coosa County, Cities and towns

Cities and towns in Coosa County

About 10,161 people live in Coosa County by the Census Bureau's estimate for July 1, 2025, 177 fewer than in 2020 (−1.7%). That works out to 16 people per square mile of land. No town dominates: Goodwater, the largest, has 1,256 residents, 12.4% of the total. Together its 3 incorporated places hold 17.0% of those residents; the other 83.0% live outside any of them. Reported testing is thin here: 11 tests over 2005 to 2014, or 1.1 for every 1,000 residents (2025 estimate), where Alabama as a whole comes to 2.7.

From Goodwater to Kellyton, CDC publishes no figure by town: each reads Coosa County's.

The cities and towns in Coosa County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Goodwater1,256−3.0%12.4%
Rockford345−1.4%3.4%
Kellyton123−2.4%1.2%

3 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).

Coosa County, Homes

Homes in Coosa County

Of Coosa County's 6,042 homes, 64% are detached houses, against 69% across Alabama; 31% are mobile homes. Half of its homes were built before 1986, close to Alabama's 1985: 18% date from before 1960 and 22% from 2000 or later. Owners live in 81% of the occupied homes (Alabama: 70%), so for most households a test and a fix are their own to order.

Homes in Coosa County, Alabama, 2019 to 2023
HomesCoosa CountyAlabama
Housing units6,0422,316,192
Detached houses64%69%
In buildings of 5 or more3%12%
Mobile homes31%13%
Built before 196018%16%
Built since 200022%27%
Middle year built19861985
Owner-occupied81%70%

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