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Radon Levels in Franklin County, Georgia

EPA puts Franklin County in Zone 2, its middle radon zone, and only 27 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

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  • Share at 4+ pCi/L

    23.6%

    0.4 pts above GA

    Franklin
    23.6%
    Georgia
    23.2%

    72 tests, 2005 to 2014

  • Median result

    1.6pCi/L

    Below action level

    Franklin
    1.6 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2005 to 2014

  • Tests reported

    72

    40th of 58 by tests

    Franklin
    72
    Fulton
    3,641

    Reported to CDC before any fix, 2005 to 2014

  • 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

    26 of 58

    Middle half

    Franklin
    23.6%
    Barrow
    48.9%

    By share, of 58 with 30+ tests

Read a result for Franklin County

Starts at Franklin County's median, 1.6 pCi/L

1.6pCi/L

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

EPA’s reading of 1.6 pCi/L

Below 2 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 below 2 pCi/L, the level at which EPA says a fix should be considered. Franklin County's median reported result, 2005 to 2014.

Interpret this reading

The data

Franklin County, At a glance

Franklin County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Franklin 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 Franklin County, 2008 to 2017, laboratory

CDC holds 27 reported tests for Franklin County over the 2008 to 2017 laboratory totals, with a median of 2.7 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Franklin County beside the counties around it is how this page reads it.

What these figures count

Only 27 tests were reported to CDC for Franklin 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

Franklin County, Compared

Franklin County radon figures, compared

Calculated by Radon411

Franklin County's 72 reported tests over the 2005 to 2014 laboratory totals had a middle value of 1.6 pCi/L and a maximum of 17.2 pCi/L, and 23.6% reached 4 pCi/L. Georgia as a whole (133 Georgia counties, pooled) comes to 23.2%: 0.4 points lower than here.

The newest figure, over the 2008 to 2017 laboratory totals, counts only 27 tests (37.0% at or above 4 pCi/L), too few to compare, so this reading uses the 72-test figure.

Among its state's counties it ranks 26th of 58 Georgia counties with 30 or more tests for the same period. Statewide for the same period, Barrow County reported the highest share (48.9%) and Dougherty County the lowest (0.0%).

Below the action level, 40 tests (55.6%) came in under 2 pCi/L, against 47.1% statewide, and 15 tests (20.8%) fell between 2 and 4, against 29.7% statewide. CDC's ten-year totals for Franklin County went from 72 tests (2005 to 2014) to 27 (2008 to 2017), the share going from 23.6% to 37.0%.

EPA's 1993 zone map puts Franklin 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 15.0% in Madison County to 44.8% in Oconee County, SC, with Stephens County and Madison County below Franklin County.

Franklin County against Georgia, the United States and nearby counties, 2005 to 2014, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Franklin County
Franklin County7223.6%1.6 pCi/LThis county
Georgia, pooled133 counties, pooled25,27923.2%Not pooled−0.4 points
United States, pooled2,655 counties, pooled1,669,35336.0%Not pooled+12.4 points
Barrow Countyhighest in the state27048.9%3.8 pCi/L+25.3 points
Dougherty Countylowest in the state320.0%0.6 pCi/L−23.6 points
Oconee County, SCborders it2,02044.8%3.5 pCi/L+21.2 points
Hart County, GAborders it8643.0%3.4 pCi/L+19.4 points
Banks County, GAborders it5729.8%2.7 pCi/L+6.2 points
Stephens County, GAborders it7220.8%2.0 pCi/L−2.8 points
Madison County, GAborders it47915.0%1.3 pCi/L−8.6 points
Where Franklin County's reported results fell, 2005 to 2014, laboratory, beside Georgia and the United States
ResultFranklin County testsFranklin County shareGeorgia shareU.S. shareAgainst Georgia
Under 2 pCi/L4055.6%47.1%39.8%+8.5 points
2 to 4 pCi/L1520.8%29.7%24.2%−8.9 points
4 pCi/L and above1723.6%23.2%36.0%+0.4 points
Franklin County ranked among the 58 Georgia counties with 30 or more tests, by share at or above 4 pCi/L, 2005 to 2014, laboratory
CountyRankTestsAt or above 4 pCi/LMedian
Troup County21 of 585726.3%2.5 pCi/L
Bartow County22 of 5815726.1%2.2 pCi/L
Monroe County23 of 5822425.4%1.9 pCi/L
Oglethorpe County24 of 5810624.5%2.0 pCi/L
Newton County25 of 5815024.0%2.2 pCi/L
Franklin County26 of 587223.6%1.6 pCi/L
Rabun County27 of 585123.5%2.0 pCi/L
White County28 of 589523.2%2.7 pCi/L
Catoosa County29 of 584822.9%1.4 pCi/L
Clayton County30 of 5814222.5%1.6 pCi/L
Henry County31 of 5836622.1%2.3 pCi/L
Franklin County ten-year laboratory totals, against Georgia's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestGeorgia, pooledChange from the row before
2008 to 20172737.0%2.7 pCi/L13.4 pCi/L24.8%+2.1 points
2007 to 20164334.9%2.6 pCi/L13.4 pCi/L23.9%−2.6 points
2006 to 20154037.5%2.9 pCi/L13.4 pCi/L23.7%+13.9 points
2005 to 20147223.6%1.6 pCi/L17.2 pCi/L23.2%First on file

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

Franklin County, Geology

The ground under Franklin County

Predicted

USGS's geologic map puts all of Franklin 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 Franklin County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Georgiabama Thrust Stack (South)Schist, amphibolite and granite.Moderate9100%

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

Franklin County beside the ground around it

Franklin County has more moderate-potential ground than Georgia as a whole: 100% of its land against 26.5%. Of the 5 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: Franklin County, the 5 counties bordering it and Georgia
AreaEPA zoneLow potentialModerate potentialHigh potential
Franklin CountyZone 2None100%None
Stephens CountyZone 2None100%None
Hart CountyZone 2None100%None
Banks CountyZone 2None100%None
Madison CountyZone 2None100%None
Oconee County, SCZone 2None89.0%11.0%
Georgia159 counties, pooled by land areaVaries73.1%26.5%None

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

Local help

Franklin County, Local resources

Radon testing and mitigation in Franklin 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

Franklin County, Questions

Questions about radon in Franklin County

Are radon levels high in Franklin County?

Over the 2008 to 2017 laboratory totals, 37.0% of the radon tests reported to CDC for Franklin County, Georgia were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.7 pCi/L. Of 58 Georgia counties with 30 or more tests for the same period, 25 reported a higher share; pooled, the state comes to 23.2%.

Which counties border Franklin County?

Franklin County borders 5 counties: Stephens County, GA, Hart County, GA, Banks County, GA, Madison County, GA and Oconee County, SC.

Products

Franklin County, Products

Testing a home in Franklin County

In Franklin County, 23.6% of 72 tests reported to CDC over the 2005 to 2014 laboratory totals reached 4 pCi/L, against 23.2% pooled across Georgia. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Franklin County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Franklin County homes, compared

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Franklin County, Bordering counties

Counties bordering Franklin County

Calculated by Radon411

Franklin County, Cities and towns

Cities and towns in Franklin County

Franklin County is growing: the Census Bureau puts it at 25,948 residents on July 1, 2025, up 10.5% from 23,476 in 2020. That works out to 99 people per square mile of land. Royston, the largest place on its list (2,693 residents in all), extends beyond Franklin County, so no share of the total is worked out for it. CDC's 72 reported tests for 2005 to 2014 work out to 2.8 per 1,000 residents (2025 estimate), close to Georgia's 2.2.

From Royston to Martin, CDC publishes no figure by town: each reads Franklin County's.

The cities and towns in Franklin County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Roystonextends beyond Franklin County2,693+1.9%Counted whole
Lavoniaextends beyond Franklin County2,200+3.2%Counted whole
Franklin Springs1,206+5.6%4.6%
Carnesville879+26.1%3.4%
Canonextends beyond Franklin County732+12.3%Counted whole
Martinextends beyond Franklin County353+4.1%Counted whole

6 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 Franklin County is counted whole, so it has no share.

Franklin County, Homes

Homes in Franklin County

Of Franklin County's 10,767 homes, 62% are detached houses, against 66% across Georgia; 31% are mobile homes. Half of its homes were built before 1989, close to Georgia's 1991: 14% date from before 1960 and 27% from 2000 or later. Owners live in 76% of the occupied homes (Georgia: 65%), so for most households a test and a fix are their own to order.

Homes in Franklin County, Georgia, 2019 to 2023
HomesFranklin CountyGeorgia
Housing units10,7674,483,873
Detached houses62%66%
In buildings of 5 or more4%16%
Mobile homes31%8%
Built before 196014%12%
Built since 200027%33%
Middle year built19891991
Owner-occupied76%65%

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