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RadonVerdict
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
32
Zone 2
Moderate
25
Zone 3
Low Risk
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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