Mississippi Radon Zone Map
Counties colored by EPA radon zone. Red = Zone 1, Orange = Zone 2, Green = Zone 3.
All 82 Counties — By Radon Risk
| County | EPA Zone | Tests | % Above 4 pCi/L |
|---|
| Alcorn |
Moderate |
6 |
— |
| Chickasaw |
Moderate |
— |
— |
| Clay |
Moderate |
— |
— |
| Lee |
Moderate |
13 |
38.5% |
| Lowndes |
Moderate |
9 |
44.4% |
| Noxubee |
Moderate |
— |
— |
| Pontotoc |
Moderate |
6 |
— |
| Union |
Moderate |
5 |
— |
| Adams |
Low |
4 |
— |
| Amite |
Low |
— |
— |
| Attala |
Low |
— |
— |
| Benton |
Low |
— |
— |
| Bolivar |
Low |
5 |
— |
| Calhoun |
Low |
4 |
— |
| Carroll |
Low |
— |
— |
| Choctaw |
Low |
— |
— |
| Claiborne |
Low |
— |
— |
| Clarke |
Low |
— |
— |
| Coahoma |
Low |
4 |
— |
| Copiah |
Low |
6 |
— |
| Covington |
Low |
4 |
— |
| DeSoto |
Low |
23 |
34.8% |
| Forrest |
Low |
9 |
55.6% |
| Franklin |
Low |
— |
— |
| George |
Low |
— |
— |
| Greene |
Low |
— |
— |
| Grenada |
Low |
4 |
— |
| Hancock |
Low |
10 |
50% |
| Harrison |
Low |
34 |
35.3% |
| Hinds |
Low |
43 |
27.9% |
| Holmes |
Low |
— |
— |
| Humphreys |
Low |
— |
— |
| Issaquena |
Low |
— |
— |
| Itawamba |
Low |
— |
— |
| Jackson |
Low |
23 |
43.5% |
| Jasper |
Low |
— |
— |
| Jefferson |
Low |
— |
— |
| Jefferson Davis |
Low |
— |
— |
| Jones |
Low |
10 |
50% |
| Kemper |
Low |
— |
— |
| Lafayette |
Low |
— |
— |
| Lamar |
Low |
10 |
— |
| Lauderdale |
Low |
17 |
29.4% |
| Lawrence |
Low |
— |
— |
| Leake |
Low |
4 |
— |
| Leflore |
Low |
4 |
— |
| Lincoln |
Low |
5 |
— |
| Madison |
Low |
18 |
— |
| Marion |
Low |
6 |
— |
| Marshall |
Low |
4 |
100% |
| Monroe |
Low |
7 |
— |
| Montgomery |
Low |
— |
— |
| Neshoba |
Low |
6 |
— |
| Newton |
Low |
5 |
— |
| Oktibbeha |
Low |
5 |
— |
| Panola |
Low |
8 |
— |
| Pearl River |
Low |
14 |
28.6% |
| Perry |
Low |
— |
— |
| Pike |
Low |
8 |
— |
| Prentiss |
Low |
6 |
— |
| Quitman |
Low |
— |
— |
| Rankin |
Low |
25 |
28% |
| Scott |
Low |
5 |
— |
| Sharkey |
Low |
— |
— |
| Simpson |
Low |
4 |
— |
| Smith |
Low |
— |
— |
| Stone |
Low |
— |
— |
| Sunflower |
Low |
5 |
— |
| Tallahatchie |
Low |
— |
— |
| Tate |
Low |
5 |
— |
| Tippah |
Low |
— |
— |
| Tishomingo |
Low |
— |
— |
| Tunica |
Low |
— |
— |
| Walthall |
Low |
4 |
— |
| Warren |
Low |
7 |
— |
| Washington |
Low |
10 |
50% |
| Wayne |
Low |
— |
— |
| Webster |
Low |
— |
— |
| Wilkinson |
Low |
— |
— |
| Winston |
Low |
— |
— |
| Yalobusha |
Low |
— |
— |
| Yazoo |
Low |
5 |
— |
Sources: EPA Map of Radon Zones, CDC Environmental Health Tracking Network
Frequently Asked Questions
How many counties in Mississippi have high radon risk?
Mississippi has 0 counties classified as EPA Zone 1 (high radon risk), 8 as Zone 2 (moderate), and 74 as Zone 3 (low risk).
Is radon a problem in Mississippi?
The EPA recommends all homes in Mississippi be tested for radon, regardless of which zone they're in.
How do I check radon levels for my Mississippi 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.