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State overview

Radon in North Dakota

Of North Dakota's 53 counties and county equivalents, EPA places 53 in Zone 1. Zones are county-wide predictions; testing is the only way to know your home's level.

Radon in the news

North Dakota stories

Headlines link to the original publishers via Google News. Updated 2026-10-27.

All 53 counties

CountyEPA zone
Adams CountyZone 1
Barnes CountyZone 1
Benson CountyZone 1
Billings CountyZone 1
Bottineau CountyZone 1
Bowman CountyZone 1
Burke CountyZone 1
Burleigh CountyZone 1
Cass CountyZone 1
Cavalier CountyZone 1
Dickey CountyZone 1
Divide CountyZone 1
Dunn CountyZone 1
Eddy CountyZone 1
Emmons CountyZone 1
Foster CountyZone 1
Golden Valley CountyZone 1
Grand Forks CountyZone 1
Grant CountyZone 1
Griggs CountyZone 1
Hettinger CountyZone 1
Kidder CountyZone 1
LaMoure CountyZone 1
Logan CountyZone 1
McHenry CountyZone 1
McIntosh CountyZone 1
McKenzie CountyZone 1
McLean CountyZone 1
Mercer CountyZone 1
Morton CountyZone 1
Mountrail CountyZone 1
Nelson CountyZone 1
Oliver CountyZone 1
Pembina CountyZone 1
Pierce CountyZone 1
Ramsey CountyZone 1
Ransom CountyZone 1
Renville CountyZone 1
Richland CountyZone 1
Rolette CountyZone 1
Sargent CountyZone 1
Sheridan CountyZone 1
Sioux CountyZone 1
Slope CountyZone 1
Stark CountyZone 1
Steele CountyZone 1
Stutsman CountyZone 1
Towner CountyZone 1
Traill CountyZone 1
Walsh CountyZone 1
Ward CountyZone 1
Wells CountyZone 1
Williams CountyZone 1

Source: EPA radon zones spreadsheet (EPA 402/A-16/001).