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Radon Levels in Chattooga County, Georgia

EPA puts Chattooga County in Zone 3, its lowest radon zone, and only 15 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

    19.2%

    Walker County

    Walker
    19.2%
    DeKalb
    9.5%

    3 of 4 neighbours have 30+ tests, 2007 to 2016

  • Nearest county

    17.1%

    Floyd County, 16 miles

    Floyd
    17.1%
    Georgia
    23.9%

    Share at 4+ pCi/L, 117 tests, 2007 to 2016

  • Ground above low

    None

    26.5 pts below Georgia

    Chattooga
    0.0%
    Georgia
    26.5%

    Share of land USGS rates moderate or high potential

  • Tests reported

    15

    Too few for a share

    Chattooga
    15
    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 Chattooga 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

Chattooga County, At a glance

Chattooga County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

is EPA's lowest class, and its forecast for Chattooga 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 Chattooga County, 2008 to 2017, laboratory

CDC holds 15 reported tests for Chattooga County over the 2008 to 2017 laboratory totals, with a median of 5.0 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Chattooga County beside the counties around it is how this page reads it.

What these figures count

Only 15 tests were reported to CDC for Chattooga 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

Chattooga County, Compared

Chattooga County radon figures, compared

Calculated by Radon411

CDC's largest figure for Chattooga County rests on 15 tests over the 2008 to 2017 laboratory totals, 9 of them at or above 4 pCi/L, so each test moves its share by 6.7 points and no rank or comparison is drawn from it. Results reached as high as 16.1 pCi/L, with a middle value of 5.0 pCi/L.

Of the counties bordering it, 3 have a figure over the 2007 to 2016 laboratory totals: Walker County reported the largest share at or above 4 pCi/L, 19.2%, and DeKalb County, AL the smallest, 9.5%, with Floyd County at 17.1% between. Farther out, Gordon County (27 miles away) at 34.4%, Whitfield County (31 miles away) at 16.8% and Catoosa County (32 miles away) at 17.9% have figures too. Pooled across 137 Georgia counties, 23.9% of reported tests reached that level; across every county in the country with a figure, 35.8%.

Statewide for the same period, Barrow County reported the highest share (51.0%) and Dougherty County the lowest (0.0%). EPA's 1993 map puts Chattooga 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.

Georgia, the United States and the counties around Chattooga County, 2007 to 2016, laboratory
AreaTestsAt or above 4 pCi/LMedian
Georgia, pooled137 counties, pooled29,45523.9%Not pooled
United States, pooled2,666 counties, pooled1,939,02535.8%Not pooled
Barrow Countyhighest in the state34151.0%4.0 pCi/L
Dougherty Countylowest in the state320.0%0.6 pCi/L
Walker County, GAborders it5219.2%1.4 pCi/L
Floyd County, GAborders it11717.1%1.7 pCi/L
Cherokee County, ALborders it1010.0%1.5 pCi/L
DeKalb County, ALborders it639.5%0.9 pCi/L
The nearest Georgia counties to Chattooga County with 30 or more tests, 2007 to 2016, laboratory
CountyDistanceTestsAt or above 4 pCi/LMedian
Floyd County16 mi11717.1%1.7 pCi/L
Walker County18 mi5219.2%1.4 pCi/L
Gordon County27 mi3234.4%2.1 pCi/L
Whitfield County31 mi9516.8%1.1 pCi/L
Catoosa County32 mi5617.9%1.1 pCi/L
Bartow County33 mi18323.5%2.1 pCi/L
Paulding County47 mi27622.5%2.2 pCi/L
Pickens County50 mi10939.4%2.9 pCi/L
Chattooga County ten-year laboratory totals, against Georgia's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestGeorgia, pooledChange from the row before
2008 to 20171560.0%5.0 pCi/L16.1 pCi/L24.8%+6.2 points
2007 to 20161353.8%5.0 pCi/L11.7 pCi/L23.9%Level
2006 to 20151353.8%5.0 pCi/L11.7 pCi/L23.7%+3.8 points
2005 to 2014850.0%4.2 pCi/L11.2 pCi/L23.2%First on file

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

Chattooga County, Geology

The ground under Chattooga County

Predicted

USGS's geologic map puts all of Chattooga County's mapped land in one class: low radon potential. All of it lies in the area the map calls Rome-Kingston Thrust Stack, to which USGS gives a radon index of 8, in the low band (5 to 8).

USGS's geologic areas under Chattooga County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Rome-Kingston Thrust StackLimestone and shale.Low8100%

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

Chattooga County beside the ground around it

Across Georgia 26.5% of the land is rated moderate; none of Chattooga County's is. Of the 4 counties that border it, 2 have more high-potential ground, Cherokee County, AL the most at 8.2%.

Share of land by USGS radon potential: Chattooga County, the 4 counties bordering it and Georgia
AreaEPA zoneLow potentialModerate potentialHigh potential
Chattooga CountyZone 3100%NoneNone
Floyd CountyZone 2100%NoneNone
DeKalb County, ALZone 2None99.7%0.2%
Walker CountyZone 2100%NoneNone
Cherokee County, ALZone 20.2%91.6%8.2%
Georgia159 counties, pooled by land areaVaries73.1%26.5%None

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

What it means

Chattooga County, Questions

Questions about radon in Chattooga County

Are radon levels high in Chattooga County?

Over the 2008 to 2017 laboratory totals, 60.0% of the radon tests reported to CDC for Chattooga County, Georgia were at or above 4 pCi/L, and the median reported pre-mitigation result was 5.0 pCi/L. Of the counties bordering it, 3 have a figure over the 2007 to 2016 laboratory totals: Walker County reported the largest share at or above 4 pCi/L, 19.2%, and DeKalb County, AL the smallest, 9.5%, with Floyd County at 17.1% between.

Which counties border Chattooga County?

Chattooga County borders 4 counties: Floyd County, GA, DeKalb County, AL, Walker County, GA and Cherokee County, AL.

Products

Chattooga County, Products

Testing a home in Chattooga County

No CDC figure names Chattooga County; the nearest county with one, Floyd County (16 miles away), reported 17.1% of its tests at or above 4 pCi/L over the 2007 to 2016 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 Chattooga County.

Explore

Chattooga County, Bordering counties

Counties bordering Chattooga County

Calculated by Radon411

Chattooga County, Cities and towns

Cities and towns in Chattooga County

The Census Bureau estimates 25,300 residents in Chattooga County for July 1, 2025, 373 more than in 2020 (+1.5%). That works out to 81 people per square mile of land. No town dominates: Summerville, the largest, has 4,440 residents, 17.5% of the total. Together its 4 incorporated places hold 29.0% of those residents; the other 71.0% live outside any of them. Reported testing is thin here: 15 tests over 2008 to 2017, or 0.6 for every 1,000 residents (2025 estimate), where Georgia as a whole comes to 2.7.

From Summerville to Lyerly, CDC publishes no figure by town: each reads Chattooga County's.

The cities and towns in Chattooga County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Summerville4,440+1.0%17.5%
Trion1,972+0.4%7.8%
Menlo475+1.1%1.9%
Lyerly460+1.1%1.8%

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).

Chattooga County, Homes

Homes in Chattooga County

Of Chattooga County's 10,883 homes, 70% are detached houses, against 66% across Georgia; 19% are mobile homes. The homes are older than Georgia's as a whole: half were built before 1977 (1991 for Georgia), and 27% date from before 1960. 67% of occupied homes are lived in by their owner (Georgia: 65%); in the rest a tenant can run a test, but a fix is the landlord's to make.

Homes in Chattooga County, Georgia, 2019 to 2023
HomesChattooga CountyGeorgia
Housing units10,8834,483,873
Detached houses70%66%
In buildings of 5 or more5%16%
Mobile homes19%8%
Built before 196027%12%
Built since 200015%33%
Middle year built19771991
Owner-occupied67%65%

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