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Radon Levels in Charlton County, Georgia

EPA puts Charlton County in Zone 3, its lowest 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

How to test this homeFind a certified tester

  • Highest bordering

    2.9%

    Nassau County

    Nassau
    2.9%

    1 of 5 neighbours have 30+ tests, 2007 to 2016

  • Nearest county

    0.0%

    Chatham County, 103 miles

    Chatham
    0.0%
    Georgia
    23.9%

    Share at 4+ pCi/L, 47 tests, 2007 to 2016

  • Ground above low

    None

    26.5 pts below Georgia

    Charlton
    0.0%
    Georgia
    26.5%

    Share of land USGS rates moderate or high potential

  • Tests reported

    1

    Too few for a share

    Charlton
    1
    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 Charlton 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.

Interpret this readingWhat a fix costs

The data

Charlton County, At a glance

Charlton County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

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

CDC holds 1 reported test for Charlton County over the 2008 to 2017 laboratory totals, a result of 0.1 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Charlton County beside the counties around it is how this page reads it.

What these figures count

Only 1 test was reported to CDC for Charlton 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

Charlton County, Compared

Charlton County radon figures, compared

Calculated by Radon411

CDC's largest figure for Charlton 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 0.1 pCi/L, with a middle value of 0.1 pCi/L.

Nassau County, FL, the one bordering county with a figure over the 2007 to 2016 laboratory totals, reported 2.9% of its tests at or above 4 pCi/L. Farther out, Chatham County (103 miles away) at 0.0%, Laurens County (125 miles away) at 16.1% and Dougherty County (134 miles away) at 0.0% 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 Charlton 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 Charlton 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
Nassau County, FLborders it342.9%0.7 pCi/L
Ware County, GAborders it150.0%0.1 pCi/L
Camden County, GAborders it110.0%0.2 pCi/L
Baker County, FLborders it10.0%1.0 pCi/L
The nearest Georgia counties to Charlton County with 30 or more tests, 2007 to 2016, laboratory
CountyDistanceTestsAt or above 4 pCi/LMedian
Chatham County103 mi470.0%0.6 pCi/L
Laurens County125 mi3116.1%0.9 pCi/L
Dougherty County134 mi320.0%0.6 pCi/L
Houston County147 mi618.2%1.5 pCi/L
Bibb County167 mi960.0%1.0 pCi/L
Jones County176 mi3426.5%2.0 pCi/L
Richmond County178 mi350.0%1.3 pCi/L
Monroe County186 mi23523.8%1.8 pCi/L
Charlton County ten-year laboratory totals, against Georgia's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestGeorgia, pooledChange from the row before
2008 to 201710.0%0.1 pCi/L0.1 pCi/L24.8%Level
2007 to 201610.0%0.1 pCi/L0.1 pCi/L23.9%Level
2006 to 201510.0%0.1 pCi/L0.1 pCi/L23.7%Level
2005 to 201410.0%0.1 pCi/L0.1 pCi/L23.2%First on file

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

Charlton County, Geology

The ground under Charlton County

Predicted

USGS's geologic map puts all of Charlton County's mapped land in one class: low radon potential. 99.4% 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 Charlton County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Coastal PlainQuaternary and Pleistocene-Pliocene coastal sand and gravel, lagoon and marsh clay and silt.Low799.4%
Gulf/Atlantic Lowland and Central Highlandsand, silt, clay, gravelLow60.6%

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

Charlton County beside the ground around it

Across Georgia 26.5% of the land is rated moderate; none of Charlton County's is. Of the 5 counties that border it, 1 has more moderate-potential ground, Baker County, FL the most at 5.8%.

Share of land by USGS radon potential: Charlton County, the 5 counties bordering it and Georgia
AreaEPA zoneLow potentialModerate potentialHigh potential
Charlton CountyZone 3100%NoneNone
Nassau County, FLZone 395.2%NoneNone
Ware CountyZone 3100%NoneNone
Baker County, FLZone 394.2%5.8%None
Camden CountyZone 387.0%NoneNone
Brantley CountyZone 3100%NoneNone
Georgia159 counties, pooled by land areaVaries73.1%26.5%None

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

Local help

Charlton County, Local resources

Radon testing and mitigation in Charlton County

What Georgia's program says
Licensing of radon professionals
There are no laws mandating a mitigator receive certification in Georgia, however, many mitigators choose to get certified by one of two national programs.

What it means

Charlton County, Questions

Questions about radon in Charlton County

Are radon levels high in Charlton County?

Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Charlton County, Georgia were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.1 pCi/L. Nassau County, FL, the one bordering county with a figure over the 2007 to 2016 laboratory totals, reported 2.9% of its tests at or above 4 pCi/L.

Which counties border Charlton County?

Charlton County borders 5 counties: Nassau County, FL, Ware County, GA, Baker County, FL, Camden County, GA and Brantley County, GA.

Products

Charlton County, Products

Testing a home in Charlton County

No CDC figure names Charlton County; the nearest county with one, Chatham County (103 miles away), reported 0.0% 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 Charlton County.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Charlton County homes, compared

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Charlton County, Bordering counties

Counties bordering Charlton County

Calculated by Radon411

Charlton County, Cities and towns

Cities and towns in Charlton County

The Census Bureau estimates 13,121 residents in Charlton County for July 1, 2025, 594 more than in 2020 (+4.7%). That works out to 17 people per square mile of land. Its largest town, Folkston, has 4,767 residents, 36.3% of the total. Together its 2 incorporated places hold 43.3% of those residents; the other 56.7% 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 Georgia as a whole comes to 2.7.

From Folkston to Homeland, CDC publishes no figure by town: each reads Charlton County's.

The cities and towns in Charlton County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Folkston4,767+5.8%36.3%
Homeland910+2.6%6.9%

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).

Charlton County, Homes

Homes in Charlton County

Of Charlton County's 4,708 homes, 58% are detached houses, against 66% across Georgia; 38% are mobile homes. Half of its homes were built before 1986, close to Georgia's 1991: 18% date from before 1960 and 21% from 2000 or later. Owners live in 78% of the occupied homes (Georgia: 65%), so for most households a test and a fix are their own to order.

Homes in Charlton County, Georgia, 2019 to 2023
HomesCharlton CountyGeorgia
Housing units4,7084,483,873
Detached houses58%66%
In buildings of 5 or more1%16%
Mobile homes38%8%
Built before 196018%12%
Built since 200021%33%
Middle year built19861991
Owner-occupied78%65%

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