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Radon Levels in Fulton County, Georgia

EPA puts Fulton County in Zone 1, its highest radon zone, and 20.8% of its 4,858 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

    20.8%

    4.0 pts below GA

    Fulton
    20.8%
    Georgia
    24.8%

    4,858 tests, 2008 to 2017

  • Median result

    2.2pCi/L

    Below action level

    Fulton
    2.2 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    4,858

    Most tested in Georgia

    Fulton
    4,858

    Reported to CDC before any fix, 2008 to 2017

  • 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

  • Rank in Georgia

    36 of 57

    Middle half

    Fulton
    20.8%
    Barrow
    48.3%

    By share, of 57 with 30+ tests

Read a result for Fulton County

Starts at Fulton 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. Fulton County's median reported result, 2008 to 2017.

Interpret this readingWhat a fix costs

The data

Fulton County, At a glance

Fulton County at a glance

Predicted: EPA radon zone

EPA Zone 1: highest predicted potential

EPA puts all of Fulton 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 100% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

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

Reported results by concentration band, Fulton County, 2008 to 2017, laboratory
Under 2 pCi/L: 44%2 to 4 pCi/L: 35%4 pCi/L and above: 21%

Of 4,858 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Fulton County, 2008 to 2017, laboratory: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L2,14844.2%
2 to 4 pCi/L1,70035.0%
4 pCi/L and above1,01020.8%
What these figures count

These are the 4,858 tests reported to CDC for Fulton 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

Fulton County, Compared

Fulton County radon figures, compared

Calculated by Radon411

Fulton County's 4,858 reported tests over the 2008 to 2017 laboratory totals had a middle value of 2.2 pCi/L and a maximum of 172.6 pCi/L, and 20.8% reached 4 pCi/L. Georgia as a whole (129 Georgia counties, pooled) comes to 24.8%: 4.0 points higher than here.

Among its state's counties it ranks 36th 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, 2,148 tests (44.2%) came in under 2 pCi/L, against 44.0% statewide, and 1,700 tests (35.0%) fell between 2 and 4, against 31.2% statewide. CDC's ten-year totals for Fulton County went from 3,641 tests (2005 to 2014) to 4,858 (2008 to 2017), the share going from 20.3% to 20.8%.

EPA's 1993 zone map puts Fulton County in Zone 1, a predicted county average above 4 pCi/L. USGS geology rates 100% of the county's land moderate radon potential.

Next door, the shares run from 13.0% in Forsyth County to 47.3% in Douglas County, with Clayton County, Coweta County and DeKalb County below Fulton County.

CDC also counts 591 tests taken after mitigation in Fulton County for the same period: tests in homes where a fix was already in.

Fulton County against Georgia, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Fulton County
Fulton County4,85820.8%2.2 pCi/LThis county
Georgia, pooled129 counties, pooled30,15224.8%Not pooled+4.0 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled+14.9 points
Barrow Countyhighest in the state32148.3%3.8 pCi/L+27.5 points
Richmond Countylowest in the state320.0%1.4 pCi/L−20.8 points
Douglas County, GAborders it35547.3%3.7 pCi/L+26.5 points
Carroll County, GAborders it19040.5%3.4 pCi/L+19.7 points
Gwinnett County, GAborders it4,18732.4%2.7 pCi/L+11.6 points
Fayette County, GAborders it87330.5%2.6 pCi/L+9.7 points
Clayton County, GAborders it15420.1%1.6 pCi/L−0.7 points
Coweta County, GAborders it54819.2%2.0 pCi/L−1.6 points
DeKalb County, GAborders it3,47518.0%1.8 pCi/L−2.8 points
Cherokee County, GAborders it1,15417.6%2.0 pCi/L−3.2 points
Cobb County, GAborders it3,31516.3%1.9 pCi/L−4.5 points
Forsyth County, GAborders it1,38313.0%1.9 pCi/L−7.8 points
Where Fulton County's reported results fell, 2008 to 2017, laboratory, beside Georgia and the United States
ResultFulton County testsFulton County shareGeorgia shareU.S. shareAgainst Georgia
Under 2 pCi/L2,14844.2%44.0%39.6%+0.2 points
2 to 4 pCi/L1,70035.0%31.2%24.7%+3.8 points
4 pCi/L and above1,01020.8%24.8%35.7%−4.0 points
Fulton 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
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
Dawson County35 of 5714221.8%2.1 pCi/L
Fulton County36 of 574,85820.8%2.2 pCi/L
Whitfield County37 of 5710220.6%1.2 pCi/L
Clayton County38 of 5715420.1%1.6 pCi/L
Floyd County39 of 5711619.8%1.9 pCi/L
Coweta County40 of 5754819.2%2.0 pCi/L
Oconee County41 of 5748319.0%1.8 pCi/L
Fulton County ten-year laboratory totals, against Georgia's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestGeorgia, pooledChange from the row before
2008 to 20174,85820.8%2.2 pCi/L172.6 pCi/L24.8%+0.5 points
2007 to 20164,61520.3%2.1 pCi/L172.6 pCi/L23.9%−0.2 points
2006 to 20154,18620.5%2.1 pCi/L49.1 pCi/L23.7%+0.2 points
2005 to 20143,64120.3%2.1 pCi/L34.5 pCi/L23.2%First on file

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

Fulton County, Geology

The ground under Fulton County

Predicted

USGS's geologic map puts all of Fulton 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 Fulton 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.

Fulton County beside the ground around it

Fulton County has more moderate-potential ground than Georgia as a whole: 100% of its land against 26.5%. Of the 10 counties that border it, none has as large a share of moderate-potential ground; Carroll County comes nearest at 100%.

Share of land by USGS radon potential: Fulton County, the 10 counties bordering it and Georgia
AreaEPA zoneLow potentialModerate potentialHigh potential
Fulton CountyZone 1None100%None
DeKalb CountyZone 1None100%None
Cobb CountyZone 1None100%None
Gwinnett CountyZone 1None100%None
Douglas CountyZone 2None100%None
Clayton CountyZone 2None100%None
Forsyth CountyZone 2None100%None
Cherokee CountyZone 2None100%None
Fayette CountyZone 2None100%None
Coweta CountyZone 2None100%None
Carroll 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

Fulton County, Local resources

Radon testing and mitigation in Fulton County

Listed radon businesses with an address in Fulton County:

Listed radon professionals by town: Atlanta, Alpharetta

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

Fulton County, Questions

Questions about radon in Fulton County

Are radon levels high in Fulton County?

Over the 2008 to 2017 laboratory totals, 20.8% of the radon tests reported to CDC for Fulton 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, 35 reported a higher share; pooled, the state comes to 24.8%.

Which counties border Fulton County?

Fulton County borders 10 counties: DeKalb County, Cobb County, Gwinnett County, Douglas County, Clayton County, Forsyth County, Cherokee County, Fayette County, Coweta County and Carroll County.

Products

Fulton County, Products

Testing a home in Fulton County

In Fulton County, 20.8% of 4,858 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 24.8% pooled across Georgia. In Zone 1 the year-round level in Fulton 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

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

Explore

Fulton County, Bordering counties

Counties bordering Fulton County

Calculated by Radon411

Fulton County, Cities and towns

Cities and towns in Fulton County

The Census Bureau estimates 1,098,791 residents in Fulton County for July 1, 2025, 29,334 more than in 2020 (+2.7%). Packed into its land, that is 2,086 people per square mile. Atlanta, the largest place on its list (529,110 residents in all), extends beyond Fulton County, so no share of the total is worked out for it. Testing is reported here more often than across the state: CDC's 4,858 reported tests for 2008 to 2017 come to 4.4 for every 1,000 residents (2025 estimate), against 2.7 for Georgia.

From Atlanta to Mountain Park, CDC publishes no figure by town: each reads Fulton County's.

The 12 largest cities and towns in Fulton County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Atlantaextends beyond Fulton County529,110+5.8%Counted whole
South Fulton112,820+4.2%10.3%
Sandy Springs105,013−3.0%9.6%
Roswellextends beyond Fulton County91,505−1.6%Counted whole
Johns Creek80,401−2.6%7.3%
Alpharetta66,921+1.5%6.1%
Milton41,266−0.3%3.8%
East Point38,225−0.5%3.5%
Union City29,910+10.4%2.7%
Fairburn17,133+3.6%1.6%
College Parkextends beyond Fulton County13,887−0.1%Counted whole
Hapeville7,410+12.9%0.7%
  • Palmetto (part)
  • Chattahoochee Hills (part)
  • Mountain Park (part)

15 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files. “(part)” marks a place that extends into another county. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025). A place that extends beyond Fulton County is counted whole, so it has no share.

Fulton County, Homes

Homes in Fulton County

Fulton County has 500,404 homes, and many share a building: 41% are in buildings of five or more, 46% are detached houses, against 66% across Georgia. Half of its homes were built before 1992, close to Georgia's 1991: 15% date from before 1960 and 38% from 2000 or later. 54% 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 Fulton County, Georgia, 2019 to 2023
HomesFulton CountyGeorgia
Housing units500,4044,483,873
Detached houses46%66%
In buildings of 5 or more41%16%
Mobile homes1%8%
Built before 196015%12%
Built since 200038%33%
Middle year built19921991
Owner-occupied54%65%

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