Counties with the Highest Radon Potential in North Dakota
The top 25 of 53 North Dakota counties on GIS Map, ranked by EPA radon zone, where zone 1 carries the highest predicted indoor radon potential and zone 3 the lowest.
| # | County | EPA radon zone |
|---|---|---|
| 1 | Adams County | 1 |
| 2 | Barnes County | 1 |
| 3 | Benson County | 1 |
| 4 | Billings County | 1 |
| 5 | Bottineau County | 1 |
| 6 | Bowman County | 1 |
| 7 | Burke County | 1 |
| 8 | Burleigh County | 1 |
| 9 | Cass County | 1 |
| 10 | Cavalier County | 1 |
| 11 | Dickey County | 1 |
| 12 | Divide County | 1 |
| 13 | Dunn County | 1 |
| 14 | Eddy County | 1 |
| 15 | Emmons County | 1 |
| 16 | Foster County | 1 |
| 17 | Golden Valley County | 1 |
| 18 | Grand Forks County | 1 |
| 19 | Grant County | 1 |
| 20 | Griggs County | 1 |
| 21 | Hettinger County | 1 |
| 22 | Kidder County | 1 |
| 23 | LaMoure County | 1 |
| 24 | Logan County | 1 |
| 25 | McHenry County | 1 |
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 Dakota”, https://gismap.land/rankings/north-dakota/highest-radon-counties. Figures from EPA Map of Radon Zones (September 2025).
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