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Counties with the Highest Radon Potential in North Carolina

The top 25 of 100 North Carolina counties on GIS Map, ranked by EPA radon zone, where zone 1 carries the highest predicted indoor radon potential and zone 3 the lowest.

#CountyEPA radon zone
1Alamance County
3
2Anson County
3
3Beaufort County
3
4Bertie County
3
5Bladen County
3
6Brunswick County
3
7Cabarrus County
3
8Camden County
3
9Carteret County
3
10Chatham County
3
11Chowan County
3
12Columbus County
3
13Craven County
3
14Cumberland County
3
15Currituck County
3
16Dare County
3
17Davidson County
3
18Davie County
3
19Duplin County
3
20Durham County
3
21Edgecombe County
3
22Gates County
3
23Granville County
3
24Greene County
3
25Guilford County
3

Source: EPA Map of Radon Zones (September 2025). All counties with data are ranked. Estimates carry margins of error.

Citing this page: GIS Map, “Counties with the Highest Radon Potential in North Carolina”, https://gismap.land/rankings/north-carolina/highest-radon-counties. Figures from EPA Map of Radon Zones (September 2025).

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