EPA radon zones
North Dakota radon map: every county's zone
53 of North Dakota's 53 counties are EPA radon zone 1 (predicted average above 4 pCi/L), 0 are zone 2 and 0 are zone 3. High readings occur in every zone, so EPA recommends testing every home.
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
How much does radon mitigation cost?
Most single-family systems cost $800 to $2,500 installed, depending on foundation type and how many suction points are needed. A follow-up test confirms the system works.
What do the zones mean?
EPA radon zones describe counties, not houses. Zone 1 counties have a predicted average indoor level above 4 picocuries per liter (pCi/L), Zone 2 between 2 and 4, Zone 3 below 2. Homes with high levels are found in every zone, which is why EPA recommends that every home be tested, and fixed at 4 pCi/L or above.
Source: EPA Map of Radon Zones.