EPA radon zones
Tennessee radon map: every county's zone
39 of Tennessee's 95 counties are EPA radon zone 1 (predicted average above 4 pCi/L), 32 are zone 2 and 24 are zone 3. High readings occur in every zone, so EPA recommends testing every home.
Anderson CountyZone 1
Bedford CountyZone 1
Benton CountyZone 2
Bledsoe CountyZone 3
Blount CountyZone 1
Bradley CountyZone 1
Campbell CountyZone 3
Cannon CountyZone 2
Carroll CountyZone 3
Carter CountyZone 2
Cheatham CountyZone 2
Chester CountyZone 2
Claiborne CountyZone 1
Clay CountyZone 2
Cocke CountyZone 2
Coffee CountyZone 2
Crockett CountyZone 3
Cumberland CountyZone 3
Davidson CountyZone 1
Decatur CountyZone 2
DeKalb CountyZone 2
Dickson CountyZone 2
Dyer CountyZone 3
Fayette CountyZone 3
Fentress CountyZone 2
Franklin CountyZone 3
Gibson CountyZone 3
Giles CountyZone 1
Grainger CountyZone 1
Greene CountyZone 1
Grundy CountyZone 3
Hamblen CountyZone 1
Hamilton CountyZone 2
Hancock CountyZone 1
Hardeman CountyZone 3
Hardin CountyZone 2
Hawkins CountyZone 1
Haywood CountyZone 3
Henderson CountyZone 2
Henry CountyZone 3
Hickman CountyZone 1
Houston CountyZone 2
Humphreys CountyZone 1
Jackson CountyZone 1
Jefferson CountyZone 1
Johnson CountyZone 2
Knox CountyZone 1
Lake CountyZone 3
Lauderdale CountyZone 3
Lawrence CountyZone 1
Lewis CountyZone 1
Lincoln CountyZone 1
Loudon CountyZone 1
Macon CountyZone 1
Madison CountyZone 1
Marion CountyZone 2
Marshall CountyZone 1
Maury CountyZone 3
McMinn CountyZone 1
McNairy CountyZone 2
Meigs CountyZone 1
Monroe CountyZone 1
Montgomery CountyZone 2
Moore CountyZone 1
Morgan CountyZone 3
Obion CountyZone 3
Overton CountyZone 2
Perry CountyZone 1
Pickett CountyZone 2
Polk CountyZone 2
Putnam CountyZone 2
Rhea CountyZone 3
Roane CountyZone 1
Robertson CountyZone 2
Rutherford CountyZone 1
Scott CountyZone 3
Sequatchie CountyZone 3
Sevier CountyZone 2
Shelby CountyZone 3
Smith CountyZone 1
Stewart CountyZone 2
Sullivan CountyZone 1
Sumner CountyZone 2
Tipton CountyZone 3
Trousdale CountyZone 1
Unicoi CountyZone 2
Union CountyZone 1
Van Buren CountyZone 2
Warren CountyZone 2
Washington CountyZone 1
Wayne CountyZone 1
Weakley CountyZone 3
White CountyZone 2
Williamson CountyZone 1
Wilson CountyZone 1
How much does radon mitigation cost?
Most single-family systems cost $800 to $2,500 installed, depending on foundation type and how many suction points are needed. A follow-up test confirms the system works.
What do the zones mean?
EPA radon zones describe counties, not houses. Zone 1 counties have a predicted average indoor level above 4 picocuries per liter (pCi/L), Zone 2 between 2 and 4, Zone 3 below 2. Homes with high levels are found in every zone, which is why EPA recommends that every home be tested, and fixed at 4 pCi/L or above.
Tennessee cities: water and radon
Source: EPA Map of Radon Zones.