EPA Zone Data 2026
Tennessee Radon Map, Levels & Testing Guide
View EPA radon zone classifications for every county in Tennessee. Open your county to compare basement test meaning, EPA action thresholds, and when mitigation pricing becomes worth checking.
38
Zone 1
High Risk
High Risk
32
Zone 2
Moderate
Moderate
25
Zone 3
Low Risk
Low Risk
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Browse Counties
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Open your county to see its EPA zone, testing meaning, and the point where mitigation becomes worth pricing.
Anderson County
Zone 1
Bedford County
Zone 1
Benton County
Zone 2
Blount County
Zone 1
Bradley County
Zone 1
Cannon County
Zone 2
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
Davidson County
Zone 1
DeKalb County
Zone 2
Decatur County
Zone 2
Dickson County
Zone 2
Fentress County
Zone 2
Giles County
Zone 1
Grainger County
Zone 1
Greene County
Zone 1
Hamblen County
Zone 1
Hamilton County
Zone 2
Hancock County
Zone 1
Hardin County
Zone 2
Hawkins County
Zone 1
Henderson County
Zone 2
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
Lawrence County
Zone 1
Lewis County
Zone 1
Lincoln County
Zone 1
Loudon County
Zone 1
Macon County
Zone 2
Marshall County
Zone 1
Maury County
Zone 1
McMinn County
Zone 1
McNairy County
Zone 2
Meigs County
Zone 1
Monroe County
Zone 1
Montgomery County
Zone 2
Moore County
Zone 1
Overton County
Zone 2
Perry County
Zone 1
Pickett County
Zone 2
Polk County
Zone 2
Putnam County
Zone 2
Roane County
Zone 1
Robertson County
Zone 2
Rutherford County
Zone 1
Sevier County
Zone 2
Smith County
Zone 1
Stewart County
Zone 2
Sullivan County
Zone 1
Sumner County
Zone 2
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
White County
Zone 2
Williamson County
Zone 1
Wilson County
Zone 1
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