EPA Zone Data 2026
SC Radon Levels
View EPA radon zone classifications for every county in SC. Select your county to see detailed risk data, testing recommendations, and mitigation cost estimates.
1
Zone 1
High Risk
High Risk
8
Zone 2
Moderate
Moderate
37
Zone 3
Low Risk
Low Risk
Abbeville
Zone 2
Aiken
Zone 3
Allendale
Zone 3
Anderson
Zone 2
Bamberg
Zone 3
Barnwell
Zone 3
Beaufort
Zone 3
Berkeley
Zone 3
Calhoun
Zone 3
Charleston
Zone 3
Cherokee
Zone 2
Chester
Zone 3
Chesterfield
Zone 3
Clarendon
Zone 3
Colleton
Zone 3
Darlington
Zone 3
Dillon
Zone 3
Dorchester
Zone 3
Edgefield
Zone 3
Fairfield
Zone 3
Florence
Zone 3
Georgetown
Zone 3
Greenville
Zone 1
Greenwood
Zone 3
Hampton
Zone 3
Horry
Zone 3
Jasper
Zone 3
Kershaw
Zone 3
Lancaster
Zone 3
Laurens
Zone 2
Lee
Zone 3
Lexington
Zone 3
Marion
Zone 3
Marlboro
Zone 3
McCormick
Zone 3
Newberry
Zone 3
Oconee
Zone 2
Orangeburg
Zone 3
Pickens
Zone 2
Richland
Zone 3
Saluda
Zone 3
Spartanburg
Zone 2
Sumter
Zone 3
Union
Zone 3
Williamsburg
Zone 3
York
Zone 2
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