EPA Zone Data 2026
South Carolina Radon Map, Levels & Testing Guide
View EPA radon zone classifications for every county in South Carolina. Open your county to compare basement test meaning, EPA action thresholds, and when mitigation pricing becomes worth checking.
1
Zone 1
High Risk
High Risk
8
Zone 2
Moderate
Moderate
37
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.
Abbeville County
Zone 2
Anderson County
Zone 2
Cherokee County
Zone 2
Greenville County
Zone 1
Laurens County
Zone 2
Oconee County
Zone 2
Pickens County
Zone 2
Spartanburg County
Zone 2
York County
Zone 2
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