EPA Zone Data 2026
North Carolina Radon Map, Levels & Testing Guide
View EPA radon zone classifications for every county in North Carolina. Open your county to compare basement test meaning, EPA action thresholds, and when mitigation pricing becomes worth checking.
8
Zone 1
High Risk
High Risk
31
Zone 2
Moderate
Moderate
61
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.
Alexander County
Zone 2
Alleghany County
Zone 1
Ashe County
Zone 2
Avery County
Zone 2
Buncombe County
Zone 1
Burke County
Zone 2
Caldwell County
Zone 2
Caswell County
Zone 2
Catawba County
Zone 2
Cherokee County
Zone 1
Clay County
Zone 2
Cleveland County
Zone 2
Forsyth County
Zone 2
Franklin County
Zone 2
Gaston County
Zone 2
Graham County
Zone 2
Haywood County
Zone 2
Henderson County
Zone 1
Iredell County
Zone 2
Jackson County
Zone 2
Lincoln County
Zone 2
Macon County
Zone 2
Madison County
Zone 2
McDowell County
Zone 2
Mitchell County
Zone 1
Polk County
Zone 2
Rockingham County
Zone 1
Rutherford County
Zone 2
Stokes County
Zone 2
Surry County
Zone 2
Swain County
Zone 2
Transylvania County
Zone 1
Vance County
Zone 2
Wake County
Zone 2
Warren County
Zone 2
Watauga County
Zone 1
Wilkes County
Zone 2
Yadkin County
Zone 2
Yancey County
Zone 2
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