Radon in Tennessee

Of Tennessee's 95 counties and county equivalents, EPA places 39 in Zone 1, 32 in Zone 2, 24 in Zone 3. Zones are county-wide predictions; testing is the only way to know your home's level.

Radon in the news

Tennessee stories

Tennessee Department of Environment and Conservation offers Free Radon Kits
Clarksville Online · 2024-02-19

Headlines link to the original publishers via Google News. Updated 2026-10-27.

All 95 counties

County	EPA zone
Anderson County	Zone 1
Bedford County	Zone 1
Benton County	Zone 2
Bledsoe County	Zone 3
Blount County	Zone 1
Bradley County	Zone 1
Campbell County	Zone 3
Cannon County	Zone 2
Carroll County	Zone 3
Carter County	Zone 2
Cheatham County	Zone 2
Chester County	Zone 2
Claiborne County	Zone 1
Clay County	Zone 2
Cocke County	Zone 2
Coffee County	Zone 2
Crockett County	Zone 3
Cumberland County	Zone 3
Davidson County	Zone 1
DeKalb County	Zone 2
Decatur County	Zone 2
Dickson County	Zone 2
Dyer County	Zone 3
Fayette County	Zone 3
Fentress County	Zone 2
Franklin County	Zone 3
Gibson County	Zone 3
Giles County	Zone 1
Grainger County	Zone 1
Greene County	Zone 1
Grundy County	Zone 3
Hamblen County	Zone 1
Hamilton County	Zone 2
Hancock County	Zone 1
Hardeman County	Zone 3
Hardin County	Zone 2
Hawkins County	Zone 1
Haywood County	Zone 3
Henderson County	Zone 2
Henry County	Zone 3
Hickman County	Zone 1
Houston County	Zone 2
Humphreys County	Zone 1
Jackson County	Zone 1
Jefferson County	Zone 1
Johnson County	Zone 2
Knox County	Zone 1
Lake County	Zone 3
Lauderdale County	Zone 3
Lawrence County	Zone 1
Lewis County	Zone 1
Lincoln County	Zone 1
Loudon County	Zone 1
Macon County	Zone 1
Madison County	Zone 1
Marion County	Zone 2
Marshall County	Zone 1
Maury County	Zone 3
McMinn County	Zone 1
McNairy County	Zone 2
Meigs County	Zone 1
Monroe County	Zone 1
Montgomery County	Zone 2
Moore County	Zone 1
Morgan County	Zone 3
Obion County	Zone 3
Overton County	Zone 2
Perry County	Zone 1
Pickett County	Zone 2
Polk County	Zone 2
Putnam County	Zone 2
Rhea County	Zone 3
Roane County	Zone 1
Robertson County	Zone 2
Rutherford County	Zone 1
Scott County	Zone 3
Sequatchie County	Zone 3
Sevier County	Zone 2
Shelby County	Zone 3
Smith County	Zone 1
Stewart County	Zone 2
Sullivan County	Zone 1
Sumner County	Zone 2
Tipton County	Zone 3
Trousdale County	Zone 1
Unicoi County	Zone 2
Union County	Zone 1
Van Buren County	Zone 2
Warren County	Zone 2
Washington County	Zone 1
Wayne County	Zone 1
Weakley County	Zone 3
White County	Zone 2
Williamson County	Zone 1
Wilson County	Zone 1

Source: EPA radon zones spreadsheet (EPA 402/A-16/001).