Kentucky Radon Zone Map
Counties colored by EPA radon zone. Red = Zone 1, Orange = Zone 2, Green = Zone 3.
Highest-Risk Counties
AdairZone 1 — High
AllenZone 1 — High
Barren50% above action level
BourbonZone 1 — High
BoyleZone 1 — High
Bullitt46.7% above action level
CaseyZone 1 — High
Clark57.1% above action level
CumberlandZone 1 — High
Fayette45% above action level
Franklin66.7% above action level
GreenZone 1 — High
+18 more
All 120 Counties — By Radon Risk
| County | EPA Zone | Tests | % Above 4 pCi/L |
|---|
| Adair |
High |
5 |
— |
| Allen |
High |
— |
— |
| Barren |
High |
8 |
50% |
| Bourbon |
High |
6 |
— |
| Boyle |
High |
5 |
— |
| Bullitt |
High |
15 |
46.7% |
| Casey |
High |
— |
— |
| Clark |
High |
7 |
57.1% |
| Cumberland |
High |
— |
— |
| Fayette |
High |
40 |
45% |
| Franklin |
High |
6 |
66.7% |
| Green |
High |
— |
— |
| Harrison |
High |
— |
— |
| Hart |
High |
— |
— |
| Jefferson |
High |
145 |
33.8% |
| Jessamine |
High |
5 |
80% |
| Lincoln |
High |
4 |
— |
| Marion |
High |
— |
— |
| Mercer |
High |
6 |
— |
| Metcalfe |
High |
— |
— |
| Monroe |
High |
— |
— |
| Nelson |
High |
8 |
— |
| Pendleton |
High |
— |
— |
| Pulaski |
High |
10 |
50% |
| Robertson |
High |
— |
— |
| Russell |
High |
— |
— |
| Scott |
High |
7 |
— |
| Taylor |
High |
7 |
— |
| Warren |
High |
15 |
46.7% |
| Woodford |
High |
— |
— |
| Anderson |
Moderate |
5 |
— |
| Bath |
Moderate |
— |
— |
| Bell |
Moderate |
5 |
— |
| Boone |
Moderate |
13 |
61.5% |
| Boyd |
Moderate |
9 |
44.4% |
| Bracken |
Moderate |
— |
— |
| Breathitt |
Moderate |
— |
— |
| Breckinridge |
Moderate |
4 |
— |
| Butler |
Moderate |
— |
— |
| Caldwell |
Moderate |
— |
— |
| Campbell |
Moderate |
16 |
37.5% |
| Carroll |
Moderate |
— |
— |
| Carter |
Moderate |
6 |
— |
| Christian |
Moderate |
8 |
75% |
| Clay |
Moderate |
5 |
— |
| Clinton |
Moderate |
— |
— |
| Crittenden |
Moderate |
— |
— |
| Daviess |
Moderate |
20 |
35% |
| Edmonson |
Moderate |
— |
— |
| Elliott |
Moderate |
— |
— |
| Estill |
Moderate |
— |
— |
| Fleming |
Moderate |
— |
— |
| Floyd |
Moderate |
8 |
— |
| Gallatin |
Moderate |
— |
— |
| Garrard |
Moderate |
— |
— |
| Grant |
Moderate |
5 |
— |
| Grayson |
Moderate |
6 |
— |
| Greenup |
Moderate |
10 |
— |
| Hancock |
Moderate |
— |
— |
| Hardin |
Moderate |
18 |
44.4% |
| Harlan |
Moderate |
5 |
— |
| Henderson |
Moderate |
7 |
— |
| Henry |
Moderate |
4 |
— |
| Hopkins |
Moderate |
10 |
60% |
| Jackson |
Moderate |
— |
— |
| Johnson |
Moderate |
— |
— |
| Kenton |
Moderate |
29 |
41.4% |
| Knott |
Moderate |
— |
— |
| Knox |
Moderate |
7 |
— |
| Larue |
Moderate |
— |
— |
| Laurel |
Moderate |
7 |
85.7% |
| Lawrence |
Moderate |
— |
— |
| Lee |
Moderate |
— |
— |
| Leslie |
Moderate |
— |
— |
| Letcher |
Moderate |
4 |
— |
| Lewis |
Moderate |
— |
— |
| Livingston |
Moderate |
— |
— |
| Logan |
Moderate |
6 |
— |
| Lyon |
Moderate |
— |
— |
| Madison |
Moderate |
9 |
— |
| Magoffin |
Moderate |
— |
— |
| Martin |
Moderate |
— |
— |
| Mason |
Moderate |
— |
— |
| McCreary |
Moderate |
— |
— |
| McLean |
Moderate |
— |
— |
| Meade |
Moderate |
6 |
— |
| Menifee |
Moderate |
— |
— |
| Montgomery |
Moderate |
4 |
— |
| Morgan |
Moderate |
— |
— |
| Muhlenberg |
Moderate |
5 |
— |
| Nicholas |
Moderate |
— |
— |
| Ohio |
Moderate |
5 |
— |
| Oldham |
Moderate |
10 |
40% |
| Owen |
Moderate |
— |
— |
| Owsley |
Moderate |
— |
— |
| Perry |
Moderate |
— |
— |
| Pike |
Moderate |
13 |
53.8% |
| Powell |
Moderate |
— |
— |
| Rockcastle |
Moderate |
— |
— |
| Rowan |
Moderate |
4 |
— |
| Shelby |
Moderate |
10 |
— |
| Simpson |
Moderate |
4 |
— |
| Spencer |
Moderate |
— |
— |
| Todd |
Moderate |
— |
— |
| Trigg |
Moderate |
4 |
— |
| Trimble |
Moderate |
— |
— |
| Union |
Moderate |
— |
— |
| Washington |
Moderate |
— |
— |
| Wayne |
Moderate |
4 |
— |
| Webster |
Moderate |
4 |
— |
| Whitley |
Moderate |
6 |
— |
| Wolfe |
Moderate |
— |
— |
| Ballard |
Low |
— |
— |
| Calloway |
Low |
7 |
— |
| Carlisle |
Low |
— |
— |
| Fulton |
Low |
— |
— |
| Graves |
Low |
7 |
57.1% |
| Hickman |
Low |
— |
— |
| Marshall |
Low |
7 |
— |
| McCracken |
Low |
13 |
38.5% |
Sources: EPA Map of Radon Zones, CDC Environmental Health Tracking Network
Frequently Asked Questions
How many counties in Kentucky have high radon risk?
Kentucky has 30 counties classified as EPA Zone 1 (high radon risk), 82 as Zone 2 (moderate), and 8 as Zone 3 (low risk).
Is radon a problem in Kentucky?
Kentucky has 30 high-risk counties where elevated radon is likely. The EPA recommends all homes in Kentucky be tested for radon, regardless of which zone they're in.
How do I check radon levels for my Kentucky address?
Enter your ZIP code in the search box above to see your county's EPA radon zone and available testing data. For your specific home's radon level, you'll need a radon test kit.