EPA Zone Data 2026
TN Radon Levels
View EPA radon zone classifications for every county in TN. Select your county to see detailed risk data, testing recommendations, and mitigation cost estimates.
38
Zone 1
High Risk
High Risk
32
Zone 2
Moderate
Moderate
25
Zone 3
Low Risk
Low Risk
Anderson
Zone 1
Bedford
Zone 1
Benton
Zone 2
Bledsoe
Zone 3
Blount
Zone 1
Bradley
Zone 1
Campbell
Zone 3
Cannon
Zone 2
Carroll
Zone 3
Carter
Zone 2
Cheatham
Zone 2
Chester
Zone 2
Claiborne
Zone 1
Clay
Zone 2
Cocke
Zone 2
Coffee
Zone 2
Crockett
Zone 3
Cumberland
Zone 3
Davidson
Zone 1
DeKalb
Zone 2
Decatur
Zone 2
Dickson
Zone 2
Dyer
Zone 3
Fayette
Zone 3
Fentress
Zone 2
Franklin
Zone 3
Gibson
Zone 3
Giles
Zone 1
Grainger
Zone 1
Greene
Zone 1
Grundy
Zone 3
Hamblen
Zone 1
Hamilton
Zone 2
Hancock
Zone 1
Hardeman
Zone 3
Hardin
Zone 2
Hawkins
Zone 1
Haywood
Zone 3
Henderson
Zone 2
Henry
Zone 3
Hickman
Zone 1
Houston
Zone 2
Humphreys
Zone 1
Jackson
Zone 1
Jefferson
Zone 1
Johnson
Zone 2
Knox
Zone 1
Lake
Zone 3
Lauderdale
Zone 3
Lawrence
Zone 1
Lewis
Zone 1
Lincoln
Zone 1
Loudon
Zone 1
Macon
Zone 2
Madison
Zone 3
Marion
Zone 3
Marshall
Zone 1
Maury
Zone 1
McMinn
Zone 1
McNairy
Zone 2
Meigs
Zone 1
Monroe
Zone 1
Montgomery
Zone 2
Moore
Zone 1
Morgan
Zone 3
Obion
Zone 3
Overton
Zone 2
Perry
Zone 1
Pickett
Zone 2
Polk
Zone 2
Putnam
Zone 2
Rhea
Zone 3
Roane
Zone 1
Robertson
Zone 2
Rutherford
Zone 1
Scott
Zone 3
Sequatchie
Zone 3
Sevier
Zone 2
Shelby
Zone 3
Smith
Zone 1
Stewart
Zone 2
Sullivan
Zone 1
Sumner
Zone 2
Tipton
Zone 3
Trousdale
Zone 1
Unicoi
Zone 2
Union
Zone 1
Van Buren
Zone 2
Warren
Zone 2
Washington
Zone 1
Wayne
Zone 1
Weakley
Zone 3
White
Zone 2
Williamson
Zone 1
Wilson
Zone 1
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