Radon in Georgia: radon map by county

EPA's Map of Radon Zones puts 4 of Georgia's 159 counties in Zone 1 (predicted average indoor radon above 4 pCi/L), 55 in Zone 2 and 100 in Zone 3. Of 24,063 building tests that radon laboratories reported for 2008 to 2017, 24.5% were at or above EPA's 4 pCi/L action level, against 36.5% nationally (number 27 of 42 states with 1,000+ tests). The highest county share is Barrow County (48.3% of 264 tests).

counties in Zone 1 (above 4 pCi/L predicted)

counties in Zone 2 (2 to 4)

100

counties in Zone 3 (below 2)

24.5%

of 24,063 lab tests at or above 4 pCi/L

Radon by county in Georgia

EPA radon zone and radon test results for each county in Georgia
County	EPA zone	Lab tests	Median	4+ pCi/L
Appling County	Zone 3	n/a	n/a	n/a
Atkinson County	Zone 3	n/a	n/a	n/a
Bacon County	Zone 3	n/a	n/a	n/a
Baker County	Zone 3	n/a	n/a	n/a
Baldwin County	Zone 3	14	1.3	20%
Banks County	Zone 2	44	2.8	35.1%
Barrow County	Zone 2	264	3.8	48.3%
Bartow County	Zone 2	133	2.2	24.9%
Ben Hill County	Zone 3	2	0.5	0%
Berrien County	Zone 3	1	1.1	0%
Bibb County	Zone 3	63	0.9	1%
Bleckley County	Zone 3	2	1.1	0%
Brantley County	Zone 3	n/a	n/a	n/a
Brooks County	Zone 3	3	1.7	0%
Bryan County	Zone 3	1	2.1	0%
Bulloch County	Zone 3	12	0.2	0%
Burke County	Zone 3	4	0.9	0%
Butts County	Zone 2	13	2.8	6.7%
Calhoun County	Zone 3	1	1.1	0%
Camden County	Zone 3	7	0.2	0%
Candler County	Zone 3	n/a	n/a	n/a
Carroll County	Zone 2	145	3.4	40.5%
Catoosa County	Zone 2	50	1.3	18.6%
Charlton County	Zone 3	1	0.1	0%
Chatham County	Zone 3	31	0.6	0%
Chattahoochee County	Zone 3	n/a	n/a	n/a
Chattooga County	Zone 3	10	5.0	60%
Cherokee County	Zone 2	988	2.0	17.6%
Clarke County	Zone 2	460	1.5	12.8%
Clay County	Zone 3	n/a	n/a	n/a
Clayton County	Zone 2	128	1.6	20.1%
Clinch County	Zone 3	1	0.7	0%
Cobb County	Zone 1	2,796	1.9	16.3%
Coffee County	Zone 3	5	1.0	0%
Colquitt County	Zone 3	2	0.5	0%
Columbia County	Zone 3	46	0.9	11.1%
Cook County	Zone 3	1	3.9	0%
Coweta County	Zone 2	470	2.0	19.2%
Crawford County	Zone 3	2	2.2	50%
Crisp County	Zone 3	1	0.1	0%
Dade County	Zone 3	14	1.5	17.6%
Dawson County	Zone 2	102	2.1	21.8%
Decatur County	Zone 3	3	1.6	0%
DeKalb County	Zone 1	2,913	1.8	18%
Dodge County	Zone 3	1	0.7	0%
Dooly County	Zone 3	n/a	n/a	n/a
Dougherty County	Zone 3	11	0.6	0%
Douglas County	Zone 2	281	3.7	47.3%
Early County	Zone 3	2	2.8	50%
Echols County	Zone 3	n/a	n/a	n/a
Effingham County	Zone 3	4	1.2	0%
Elbert County	Zone 2	124	1.9	18.6%
Emanuel County	Zone 3	1	0.7	0%
Evans County	Zone 3	n/a	n/a	n/a
Fannin County	Zone 2	205	3.5	44.7%
Fayette County	Zone 2	683	2.6	30.5%
Floyd County	Zone 2	67	1.9	19.8%
Forsyth County	Zone 2	1,166	1.9	13%
Franklin County	Zone 2	20	2.7	37%
Fulton County	Zone 1	4,025	2.2	20.8%
Gilmer County	Zone 2	214	3.8	46.6%
Glascock County	Zone 3	n/a	n/a	n/a
Glynn County	Zone 3	10	0.2	0%
Gordon County	Zone 3	24	2.1	31.4%
Grady County	Zone 3	n/a	n/a	n/a
Greene County	Zone 2	65	1.9	17.6%
Gwinnett County	Zone 1	3,330	2.7	32.4%
Habersham County	Zone 2	103	3.1	37.5%
Hall County	Zone 2	880	3.2	39.8%
Hancock County	Zone 3	3	2.0	0%
Haralson County	Zone 2	17	2.1	31.8%
Harris County	Zone 2	44	1.9	15.7%
Hart County	Zone 2	75	3.4	40.2%
Heard County	Zone 2	15	1.8	26.3%
Henry County	Zone 2	267	2.1	22.7%
Houston County	Zone 3	38	1.4	11.3%
Irwin County	Zone 3	1	0.1	0%
Jackson County	Zone 2	365	3.2	40%
Jasper County	Zone 2	19	2.3	27.3%
Jeff Davis County	Zone 3	n/a	n/a	n/a
Jefferson County	Zone 3	3	0.6	0%
Jenkins County	Zone 3	1	0.1	0%
Johnson County	Zone 3	1	2.2	0%
Jones County	Zone 3	21	2.2	29%
Lamar County	Zone 2	10	2.1	40%
Lanier County	Zone 3	n/a	n/a	n/a
Laurens County	Zone 3	17	1.0	17.9%
Lee County	Zone 3	4	1.0	0%
Liberty County	Zone 3	3	1.1	0%
Lincoln County	Zone 3	1	0.1	0%
Long County	Zone 3	n/a	n/a	n/a
Lowndes County	Zone 3	8	1.1	0%
Lumpkin County	Zone 2	101	3.6	46.3%
Macon County	Zone 3	2	1.3	33.3%
Madison County	Zone 2	163	2.4	26.1%
Marion County	Zone 3	1	1.0	0%
McDuffie County	Zone 3	12	0.9	8.3%
McIntosh County	Zone 3	5	0.8	0%
Meriwether County	Zone 2	18	1.6	4.5%
Miller County	Zone 3	n/a	n/a	n/a
Mitchell County	Zone 3	n/a	n/a	n/a
Monroe County	Zone 2	180	1.6	23%
Montgomery County	Zone 3	n/a	n/a	n/a
Morgan County	Zone 2	49	1.5	16.7%
Murray County	Zone 3	10	1.3	23.1%
Muscogee County	Zone 3	87	0.9	5.7%
Newton County	Zone 2	155	2.1	25.8%
Oconee County	Zone 2	373	1.8	19%
Oglethorpe County	Zone 2	52	2.5	32.9%
Paulding County	Zone 2	225	2.3	26%
Peach County	Zone 3	2	4.3	66.7%
Pickens County	Zone 2	104	3.1	37.6%
Pierce County	Zone 3	12	0.1	0%
Pike County	Zone 2	20	3.2	38.5%
Polk County	Zone 3	16	4.9	57.1%
Pulaski County	Zone 3	6	0.6	0%
Putnam County	Zone 3	26	2.2	30%
Quitman County	Zone 3	n/a	n/a	n/a
Rabun County	Zone 2	42	2.0	26.1%
Randolph County	Zone 3	6	1.6	16.7%
Richmond County	Zone 2	23	1.4	0%
Rockdale County	Zone 2	187	2.3	29.1%
Schley County	Zone 3	2	0.5	0%
Screven County	Zone 3	2	1.0	0%
Seminole County	Zone 3	n/a	n/a	n/a
Spalding County	Zone 2	68	2.9	33.6%
Stephens County	Zone 2	61	2.2	25.3%
Stewart County	Zone 3	n/a	n/a	n/a
Sumter County	Zone 3	4	3.7	20%
Talbot County	Zone 2	1	0.1	0%
Taliaferro County	Zone 3	n/a	n/a	n/a
Tattnall County	Zone 3	n/a	n/a	n/a
Taylor County	Zone 3	n/a	n/a	n/a
Telfair County	Zone 3	2	1.6	0%
Terrell County	Zone 3	n/a	n/a	n/a
Thomas County	Zone 3	11	1.7	13.3%
Tift County	Zone 3	4	1.4	0%
Toombs County	Zone 3	1	0.8	0%
Towns County	Zone 2	97	2.8	31.9%
Treutlen County	Zone 3	n/a	n/a	n/a
Troup County	Zone 2	49	2.9	33.9%
Turner County	Zone 3	n/a	n/a	n/a
Twiggs County	Zone 3	2	2.4	50%
Union County	Zone 2	189	3.3	44.6%
Upson County	Zone 2	14	0.7	20%
Walker County	Zone 2	38	1.6	22.7%
Walton County	Zone 2	616	3.3	42.2%
Ware County	Zone 3	13	0.1	0%
Warren County	Zone 3	2	0.5	0%
Washington County	Zone 3	1	0.1	0%
Wayne County	Zone 3	2	0.5	0%
Webster County	Zone 3	n/a	n/a	n/a
Wheeler County	Zone 3	1	0.5	0%
White County	Zone 2	68	2.7	25.3%
Whitfield County	Zone 2	63	1.2	20.6%
Wilcox County	Zone 3	2	0.1	0%
Wilkes County	Zone 3	9	2.0	20%
Wilkinson County	Zone 3	2	0.1	0%
Worth County	Zone 3	n/a	n/a	n/a

Lab tests: buildings tested by radon laboratories, 2008 to 2017; median in pCi/L; “4+ pCi/L” is the share of tests at or above EPA's action level. n/a: no value on file (no tests, or too few to report).

What the zones mean

Zone 1 counties have a predicted average indoor radon screening level above 4 pCi/L, Zone 2 from 2 to 4 pCi/L and Zone 3 below 2 pCi/L. The prediction is from 1993 indoor measurements, geology, aerial radioactivity, soils and foundation types. EPA: “This map should not be used to determine if individual homes need to be tested.” EPA recommends fixing a home at 4 pCi/L or more and considering a fix between 2 and 4 pCi/L, because there is no known safe level of exposure.

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Radon in Georgia: questions

What radon zone is Georgia?

EPA's 1993 map does not give states one zone; it zones each county. In Georgia, 4 counties are Zone 1, 55 Zone 2 and 100 Zone 3. EPA says the map "should not be used to determine if individual homes need to be tested".

Which Georgia counties have the highest radon levels?

By the share of laboratory tests at or above 4 pCi/L for 2008 to 2017 (counties with 20 or more tests): Barrow County 48.3% (median 3.8 pCi/L, 264 tests); Douglas County 47.3% (median 3.7 pCi/L, 281 tests); Gilmer County 46.6% (median 3.8 pCi/L, 214 tests); Lumpkin County 46.3% (median 3.6 pCi/L, 101 tests); Fannin County 44.7% (median 3.5 pCi/L, 205 tests).

How common is high radon in Georgia?

24.5% of the 24,063 tests in the laboratory data for Georgia (2008 to 2017) were at or above 4 pCi/L; the national share was 36.5%. Buildings are tested by choice, often because of a sale or a concern, so the share describes the tests on file, not every home.

Should I test for radon in Georgia?

Yes. EPA recommends testing every home no matter where it is, fixing it at 4 pCi/L or more and considering a fix between 2 and 4 pCi/L, because there is no known safe level of radon exposure.

States bordering Georgia

Radon in Alabama (13 of 67 in Zone 1)Radon in Florida (0 of 67 in Zone 1)Radon in North Carolina (8 of 100 in Zone 1)Radon in South Carolina (1 of 46 in Zone 1)Radon in Tennessee (39 of 95 in Zone 1)

Other free hazard lookups

All of these, plus wetlands, FEMA hazard ratings and the federal contamination lists, are in the Environmental Records Report for any US address ($29).

Superfund sites in Georgia · Radon map of every state

Data compiled 2026-10-20. County-level screening information, not a radon measurement of any building.