Radon in Georgia
Radon in Georgia varies from house to house, so the county figures below describe areas, not homes. EPA places 4 of the state's 159 counties in Zone 1, its highest band of predicted indoor radon, where about 33% of residents live; 100 are in Zone 3. On the water side, EPA has recorded health-based violations at 117 of the state's 1,743 community water systems since 2016.
What Georgia's radon program offers
Georgia law does not require radon testing or mitigation in most home sales.
Georgia has no law requiring radon mitigators to hold a certification.
The UGA Extension radon program refers residents to the national NRPP and NRSB directories of certified mitigators.
Read on UGA Cooperative Extension pages, checked 2026-10-29: state radon program.
Radon in Georgia by county
The Georgia radon map below groups counties by EPA zone; zones predict Georgia radon levels from geology and past surveys and are not home measurements. The largest county, Fulton County (1,090,354 residents), is in Zone 1.
| County | Residents | Water systems | Violations since 2016 | Unresolved |
|---|---|---|---|---|
| Cobb County | 787,538 | 5 | 0 | 0 |
| DeKalb County | 770,307 | 2 | 5 | 0 |
| Fulton County | 1,090,354 | 11 | 15 | 0 |
| Gwinnett County | 1,003,869 | 5 | 0 | 0 |
| County | Residents | Water systems | Violations since 2016 | Unresolved |
|---|---|---|---|---|
| Banks County | 20,318 | 7 | 11 | 0 |
| Barrow County | 96,294 | 8 | 5 | 0 |
| Bartow County | 117,508 | 8 | 0 | 0 |
| Butts County | 27,127 | 4 | 0 | 0 |
| Carroll County | 129,911 | 10 | 2 | 0 |
| Catoosa County | 68,940 | 3 | 2 | 0 |
| Cherokee County | 293,513 | 8 | 1 | 0 |
| Clarke County | 129,995 | 11 | 7 | 0 |
| Clayton County | 297,703 | 2 | 0 | 0 |
| Coweta County | 158,233 | 13 | 7 | 0 |
| Dawson County | 33,748 | 5 | 1 | 0 |
| Douglas County | 151,887 | 1 | 0 | 0 |
| Elbert County | 20,152 | 6 | 0 | 0 |
| Fannin County | 25,854 | 20 | 0 | 0 |
| Fayette County | 125,107 | 12 | 3 | 0 |
| Floyd County | 101,390 | 4 | 0 | 0 |
| Forsyth County | 280,096 | 8 | 0 | 0 |
| Franklin County | 25,208 | 7 | 23 | 0 |
| Gilmer County | 33,327 | 14 | 2 | 0 |
| Greene County | 21,091 | 22 | 18 | 0 |
| Habersham County | 49,665 | 14 | 2 | 0 |
| Hall County | 221,745 | 9 | 0 | 0 |
| Haralson County | 32,404 | 5 | 3 | 0 |
| Harris County | 36,929 | 9 | 0 | 0 |
| Hart County | 28,052 | 27 | 2 | 0 |
| Heard County | 12,119 | 2 | 4 | 0 |
| Henry County | 259,315 | 7 | 0 | 0 |
| Jackson County | 93,825 | 11 | 5 | 0 |
| Jasper County | 17,219 | 5 | 0 | 0 |
| Lamar County | 20,690 | 3 | 4 | 0 |
| Lumpkin County | 36,016 | 33 | 0 | 0 |
| Madison County | 32,771 | 22 | 4 | 0 |
| Meriwether County | 21,439 | 9 | 3 | 1 |
| Monroe County | 31,437 | 5 | 0 | 0 |
| Morgan County | 21,940 | 13 | 0 | 0 |
| Newton County | 124,010 | 13 | 8 | 0 |
| Oconee County | 44,751 | 23 | 0 | 0 |
| Oglethorpe County | 16,172 | 19 | 17 | 0 |
| Paulding County | 188,549 | 3 | 0 | 0 |
| Pickens County | 36,580 | 4 | 0 | 0 |
| Pike County | 20,669 | 9 | 0 | 0 |
| Rabun County | 17,711 | 14 | 11 | 0 |
| Richmond County | 206,303 | 5 | 3 | 0 |
| Rockdale County | 97,610 | 5 | 0 | 0 |
| Spalding County | 70,292 | 5 | 0 | 0 |
| Stephens County | 27,498 | 4 | 0 | 0 |
| Talbot County | 5,755 | 5 | 9 | 0 |
| Towns County | 13,184 | 5 | 0 | 0 |
| Troup County | 71,513 | 5 | 0 | 0 |
| Union County | 27,601 | 9 | 1 | 0 |
| Upson County | 28,358 | 9 | 2 | 0 |
| Walker County | 69,340 | 5 | 0 | 0 |
| Walton County | 109,792 | 12 | 1 | 0 |
| White County | 29,668 | 18 | 1 | 0 |
| Whitfield County | 105,070 | 1 | 0 | 0 |
| County | Residents | Water systems | Violations since 2016 | Unresolved |
|---|---|---|---|---|
| Appling County | 18,669 | 4 | 0 | 0 |
| Atkinson County | 8,435 | 5 | 10 | 0 |
| Bacon County | 11,045 | 2 | 0 | 0 |
| Baker County | 2,732 | 2 | 0 | 0 |
| Baldwin County | 43,644 | 5 | 15 | 0 |
| Ben Hill County | 16,945 | 2 | 0 | 0 |
| Berrien County | 18,666 | 4 | 0 | 0 |
| Bibb County | 157,056 | 4 | 0 | 0 |
| Bleckley County | 12,626 | 2 | 0 | 0 |
| Brantley County | 18,795 | 8 | 0 | 0 |
| Brooks County | 16,344 | 14 | 0 | 0 |
| Bryan County | 51,105 | 44 | 0 | 0 |
| Bulloch County | 85,454 | 123 | 2 | 0 |
| Burke County | 24,472 | 7 | 0 | 0 |
| Calhoun County | 5,441 | 5 | 0 | 0 |
| Camden County | 59,099 | 11 | 7 | 0 |
| Candler County | 11,130 | 9 | 0 | 0 |
| Charlton County | 13,021 | 4 | 5 | 0 |
| Chatham County | 307,336 | 83 | 2 | 0 |
| Chattahoochee County | 8,548 | 1 | 0 | 0 |
| Chattooga County | 25,306 | 5 | 3 | 0 |
| Clay County | 2,815 | 3 | 0 | 0 |
| Clinch County | 6,871 | 4 | 0 | 0 |
| Coffee County | 43,851 | 31 | 2 | 0 |
| Colquitt County | 46,977 | 33 | 0 | 0 |
| Columbia County | 167,472 | 6 | 0 | 0 |
| Cook County | 17,984 | 8 | 0 | 0 |
| Crawford County | 12,349 | 4 | 0 | 0 |
| Crisp County | 19,468 | 13 | 0 | 0 |
| Dade County | 16,068 | 1 | 0 | 0 |
| Decatur County | 29,391 | 10 | 12 | 0 |
| Dodge County | 19,630 | 4 | 0 | 0 |
| Dooly County | 11,186 | 6 | 0 | 0 |
| Dougherty County | 82,418 | 6 | 0 | 0 |
| Early County | 10,444 | 3 | 0 | 0 |
| Echols County | 3,698 | 2 | 22 | 0 |
| Effingham County | 73,148 | 71 | 0 | 0 |
| Emanuel County | 23,224 | 14 | 25 | 0 |
| Evans County | 10,869 | 7 | 0 | 0 |
| Glascock County | 3,008 | 3 | 12 | 0 |
| Glynn County | 86,540 | 50 | 1 | 0 |
| Gordon County | 60,765 | 3 | 0 | 0 |
| Grady County | 26,271 | 12 | 0 | 0 |
| Hancock County | 8,683 | 7 | 2 | 0 |
| Houston County | 174,897 | 7 | 0 | 0 |
| Irwin County | 9,155 | 5 | 0 | 0 |
| Jeff Davis County | 15,119 | 5 | 7 | 0 |
| Jefferson County | 15,019 | 7 | 0 | 0 |
| Jenkins County | 8,836 | 2 | 0 | 0 |
| Johnson County | 9,178 | 3 | 0 | 0 |
| Jones County | 29,047 | 5 | 0 | 0 |
| Lanier County | 10,464 | 8 | 1 | 0 |
| Laurens County | 50,287 | 18 | 0 | 0 |
| Lee County | 34,073 | 16 | 4 | 0 |
| Liberty County | 68,607 | 42 | 0 | 0 |
| Lincoln County | 8,049 | 3 | 3 | 0 |
| Long County | 20,439 | 55 | 1 | 0 |
| Lowndes County | 122,082 | 68 | 86 | 0 |
| Macon County | 11,831 | 6 | 5 | 0 |
| Marion County | 7,635 | 2 | 13 | 0 |
| McDuffie County | 21,764 | 1 | 13 | 0 |
| McIntosh County | 11,800 | 32 | 0 | 0 |
| Miller County | 5,824 | 1 | 0 | 0 |
| Mitchell County | 20,329 | 8 | 2 | 0 |
| Montgomery County | 8,566 | 10 | 9 | 0 |
| Murray County | 41,316 | 2 | 0 | 0 |
| Muscogee County | 201,830 | 1 | 0 | 0 |
| Peach County | 29,213 | 3 | 0 | 0 |
| Pierce County | 20,669 | 11 | 0 | 0 |
| Polk County | 44,610 | 4 | 0 | 0 |
| Pulaski County | 10,180 | 2 | 0 | 0 |
| Putnam County | 23,383 | 21 | 9 | 0 |
| Quitman County | 2,323 | 5 | 0 | 0 |
| Randolph County | 6,085 | 3 | 0 | 0 |
| Schley County | 4,503 | 2 | 0 | 0 |
| Screven County | 14,325 | 16 | 1 | 0 |
| Seminole County | 9,274 | 5 | 0 | 0 |
| Stewart County | 4,809 | 5 | 0 | 0 |
| Sumter County | 28,972 | 12 | 2 | 0 |
| Taliaferro County | 1,620 | 1 | 1 | 0 |
| Tattnall County | 24,275 | 11 | 0 | 0 |
| Taylor County | 7,783 | 4 | 14 | 0 |
| Telfair County | 11,000 | 5 | 2 | 0 |
| Terrell County | 8,698 | 6 | 0 | 0 |
| Thomas County | 46,054 | 28 | 0 | 0 |
| Tift County | 41,708 | 8 | 0 | 0 |
| Toombs County | 27,488 | 15 | 22 | 0 |
| Treutlen County | 6,420 | 1 | 0 | 0 |
| Turner County | 9,023 | 4 | 0 | 0 |
| Twiggs County | 7,728 | 9 | 0 | 0 |
| Ware County | 36,222 | 6 | 0 | 0 |
| Warren County | 5,148 | 3 | 76 | 0 |
| Washington County | 19,834 | 8 | 0 | 0 |
| Wayne County | 32,132 | 22 | 3 | 0 |
| Webster County | 2,315 | 2 | 0 | 0 |
| Wheeler County | 7,076 | 3 | 3 | 0 |
| Wilcox County | 8,904 | 5 | 0 | 0 |
| Wilkes County | 9,567 | 3 | 3 | 0 |
| Wilkinson County | 8,667 | 6 | 0 | 0 |
| Worth County | 20,262 | 11 | 0 | 0 |
Georgia tap water: violations and PFAS
Georgia has 1,743 active community water systems serving about 10,631,360 people. Since January 2016, EPA has recorded at least one health-based violation at 117 of them (17% of the people served), and 1 has one still listed as unresolved. The most frequent cause was total trihalomethanes, a byproduct of chlorine disinfection, at 38 systems, followed by haloacetic acids, a byproduct of chlorine disinfection (25) and radium, a natural radioactive element in some groundwater (21).
EPA tested 252 Georgia systems for PFAS between 2023 and 2025. 43 had a PFOA or PFOS result above the 4 ng/L limit that applies from 2029; the highest was Lafayette at 56 ng/L.
Records: EPA Map of Radon Zones, EPA ECHO drinking water data (2026Q3), EPA UCMR 5, UGA Cooperative Extension, US Census Bureau Vintage 2024. How zones and violations are counted: methodology · all states.