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Radon Levels in Stephens County, Georgia

EPA puts Stephens County in Zone 2, its middle radon zone, and 25.3% of its 79 reported radon tests (2008 to 2017, laboratory totals) were at or above 4 pCi/L. Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

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  • Share at 4+ pCi/L

    25.3%

    0.5 pts above GA

    Stephens
    25.3%
    Georgia
    24.8%

    79 tests, 2008 to 2017

  • Median result

    2.2pCi/L

    Below action level

    Stephens
    2.2 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    79

    41st of 57 by tests

    Stephens
    79
    Fulton
    4,858

    Reported to CDC before any fix, 2008 to 2017

  • 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

  • Rank in Georgia

    29 of 57

    Middle half

    Stephens
    25.3%
    Barrow
    48.3%

    By share, of 57 with 30+ tests

Read a result for Stephens County

Starts at Stephens County's median, 2.2 pCi/L

2.2pCi/L

EPA’s own thresholds; the figures are the area’s, never this home’s.

EPA’s reading of 2.2 pCi/L

Between 2 and 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 between 2 and 4 pCi/L. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. Stephens County's median reported result, 2008 to 2017.

Interpret this readingWhat a fix costs

The data

Stephens County, At a glance

Stephens County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Stephens 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 Stephens County, 2008 to 2017, laboratory

Reported results by concentration band, Stephens County, 2008 to 2017, laboratory
Under 2 pCi/L: 44%2 to 4 pCi/L: 31%4 pCi/L and above: 25%

Of 79 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Stephens County, 2008 to 2017, laboratory: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L3544.3%
2 to 4 pCi/L2430.4%
4 pCi/L and above2025.3%
What these figures count

These are the 79 tests reported to CDC for Stephens County over 2008 to 2017 (laboratory totals), many from homes being sold or already suspected of a problem: they describe the county's reported tests, not 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

Stephens County, Compared

Stephens County radon figures, compared

Calculated by Radon411

Stephens County's 79 reported tests over the 2008 to 2017 laboratory totals had a middle value of 2.2 pCi/L and a maximum of 26.3 pCi/L, and 25.3% reached 4 pCi/L. Georgia as a whole (129 Georgia counties, pooled) comes to 24.8%: 0.5 points lower than here.

Among its state's counties it ranks 29th of 57 Georgia counties with 30 or more tests for the same period. Statewide for the same period, Barrow County reported the highest share (48.3%) and Richmond County the lowest (0.0%).

Below the action level, 35 tests (44.3%) came in under 2 pCi/L, against 44.0% statewide, and 24 tests (30.4%) fell between 2 and 4, against 31.2% statewide. CDC's ten-year totals for Stephens County went from 72 tests (2005 to 2014) to 79 (2008 to 2017), the share going from 20.8% to 25.3%.

EPA's 1993 zone map puts Stephens County in Zone 2, a predicted county average between 2 and 4 pCi/L. USGS geology rates 100% of the county's land moderate radon potential.

Next door, the shares run from 35.1% in Banks County to 42.6% in Oconee County, SC.

Stephens County against Georgia, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Stephens County
Stephens County7925.3%2.2 pCi/LThis county
Georgia, pooled129 counties, pooled30,15224.8%Not pooled−0.5 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled+10.4 points
Barrow Countyhighest in the state32148.3%3.8 pCi/L+23.0 points
Richmond Countylowest in the state320.0%1.4 pCi/L−25.3 points
Oconee County, SCborders it2,46942.6%3.3 pCi/L+17.3 points
Habersham County, GAborders it12837.5%3.1 pCi/L+12.2 points
Franklin County, GAborders it2737.0%2.7 pCi/L+11.7 points
Banks County, GAborders it5735.1%2.8 pCi/L+9.8 points
Where Stephens County's reported results fell, 2008 to 2017, laboratory, beside Georgia and the United States
ResultStephens County testsStephens County shareGeorgia shareU.S. shareAgainst Georgia
Under 2 pCi/L3544.3%44.0%39.6%+0.3 points
2 to 4 pCi/L2430.4%31.2%24.7%−0.8 points
4 pCi/L and above2025.3%24.8%35.7%+0.5 points
Stephens County ranked among the 57 Georgia counties with 30 or more tests, by share at or above 4 pCi/L, 2008 to 2017, laboratory
CountyRankTestsAt or above 4 pCi/LMedian
Jones County24 of 573129.0%2.2 pCi/L
Rabun County25 of 576926.1%2.0 pCi/L
Madison County26 of 5721126.1%2.4 pCi/L
Paulding County27 of 5728926.0%2.3 pCi/L
Newton County28 of 5718625.8%2.1 pCi/L
Stephens County29 of 577925.3%2.2 pCi/L
White County30 of 579125.3%2.7 pCi/L
Bartow County31 of 5717724.9%2.2 pCi/L
Monroe County32 of 5724823.0%1.6 pCi/L
Walker County33 of 574422.7%1.6 pCi/L
Henry County34 of 5738422.7%2.1 pCi/L
Stephens County ten-year laboratory totals, against Georgia's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestGeorgia, pooledChange from the row before
2008 to 20177925.3%2.2 pCi/L26.3 pCi/L24.8%−0.4 points
2007 to 20167025.7%2.2 pCi/L26.3 pCi/L23.9%+3.5 points
2006 to 20157222.2%2.0 pCi/L26.3 pCi/L23.7%+1.4 points
2005 to 20147220.8%2.0 pCi/L26.3 pCi/L23.2%First on file

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

Stephens County, Geology

The ground under Stephens County

Predicted

USGS's geologic map puts all of Stephens County's mapped land in one class: moderate radon potential. All of it lies in the area the map calls Georgiabama Thrust Stack (South), to which USGS gives a radon index of 9, in the moderate band (9 to 11).

USGS's geologic areas under Stephens County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Georgiabama Thrust Stack (South)Schist, amphibolite and granite.Moderate999.8%

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

Stephens County beside the ground around it

Stephens County has more moderate-potential ground than Georgia as a whole: 100% of its land against 26.5%. Of the 4 counties that border it, 1 has more high-potential ground, Oconee County, SC the most at 11.0%.

Share of land by USGS radon potential: Stephens County, the 4 counties bordering it and Georgia
AreaEPA zoneLow potentialModerate potentialHigh potential
Stephens CountyZone 2None100%None
Franklin CountyZone 2None100%None
Habersham CountyZone 2None100%None
Oconee County, SCZone 2None89.0%11.0%
Banks CountyZone 2None100%None
Georgia159 counties, pooled by land areaVaries73.1%26.5%None

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

Local help

Stephens County, Local resources

Radon testing and mitigation in Stephens 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

Stephens County, Questions

Questions about radon in Stephens County

Are radon levels high in Stephens County?

Over the 2008 to 2017 laboratory totals, 25.3% of the radon tests reported to CDC for Stephens County, Georgia were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.2 pCi/L. Of 57 Georgia counties with 30 or more tests for the same period, 28 reported a higher share; pooled, the state comes to 24.8%.

Which counties border Stephens County?

Stephens County borders 4 counties: Franklin County, GA, Habersham County, GA, Oconee County, SC and Banks County, GA.

Products

Stephens County, Products

Testing a home in Stephens County

In Stephens County, 25.3% of 79 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 24.8% pooled across Georgia. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Stephens County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Stephens County homes, compared

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Stephens County, Bordering counties

Counties bordering Stephens County

Calculated by Radon411

Stephens County, Cities and towns

Cities and towns in Stephens County

The Census Bureau estimates 27,854 residents in Stephens County for July 1, 2025, 1,027 more than in 2020 (+3.8%). That works out to 156 people per square mile of land. Its largest town, Toccoa, has 9,539 residents, 34.2% of the total. CDC's 79 reported tests for 2008 to 2017 work out to 2.8 per 1,000 residents (2025 estimate), close to Georgia's 2.7.

From Toccoa to Avalon, CDC publishes no figure by town: each reads Stephens County's.

The cities and towns in Stephens County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Toccoa9,539+4.1%34.2%
Martinextends beyond Stephens County353+4.1%Counted whole
Avalon244+5.2%0.9%

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). A place that extends beyond Stephens County is counted whole, so it has no share.

Stephens County, Homes

Homes in Stephens County

Of Stephens County's 12,344 homes, 69% are detached houses, against 66% across Georgia; 20% are mobile homes. The homes are older than Georgia's as a whole: half were built before 1983 (1991 for Georgia), and 18% date from before 1960. 72% 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 Stephens County, Georgia, 2019 to 2023
HomesStephens CountyGeorgia
Housing units12,3444,483,873
Detached houses69%66%
In buildings of 5 or more4%16%
Mobile homes20%8%
Built before 196018%12%
Built since 200017%33%
Middle year built19831991
Owner-occupied72%65%

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