Radon zones in Minnesota
Last updated
EPA’s Map of Radon Zones places 87 Minnesota counties in its three radon potential zones: 68 in Zone 1 (highest), 19 in Zone 2 (moderate), and 0 in Zone 3 (low).
What this means for Minnesota homes
Most Minnesota counties fall in Zone 1. EPA predicts average indoor screening levels above 4 pCi/L across much of Minnesota, so elevated radon is common. Testing is especially worthwhile here, and radon-resistant construction features make sense for new homes.
EPA’s guidance is the same everywhere: test your home, fix it if the level is 4 pCi/L or higher, and consider fixing between 2 and 4 pCi/L. The zone map is from 1993 and should not be used to decide whether a single home needs testing.
Minnesota radon program
EPA lists the following state contact for Minnesota: MN Dept. of Health, Indoor Air Program, Radon in MN Homes, phone 651-201-5000. Website: www.health.state.mn.us/divs/eh/indoorair/radon/index.html. State programs can tell you about local testing data, free or discounted test kits, disclosure rules for home sales, and credentialed radon professionals.
Minnesota counties and their EPA radon zones
| County | EPA radon zone |
|---|---|
| Aitkin County | Zone 2 |
| Anoka County | Zone 2 |
| Becker County | Zone 1 |
| Beltrami County | Zone 2 |
| Benton County | Zone 2 |
| Big Stone County | Zone 1 |
| Blue Earth County | Zone 1 |
| Brown County | Zone 1 |
| Carlton County | Zone 2 |
| Carver County | Zone 1 |
| Cass County | Zone 2 |
| Chippewa County | Zone 1 |
| Chisago County | Zone 2 |
| Clay County | Zone 1 |
| Clearwater County | Zone 2 |
| Cook County | Zone 2 |
| Cottonwood County | Zone 1 |
| Crow Wing County | Zone 2 |
| Dakota County | Zone 1 |
| Dodge County | Zone 1 |
| Douglas County | Zone 1 |
| Faribault County | Zone 1 |
| Fillmore County | Zone 1 |
| Freeborn County | Zone 1 |
| Goodhue County | Zone 1 |
| Grant County | Zone 1 |
| Hennepin County | Zone 1 |
| Houston County | Zone 1 |
| Hubbard County | Zone 1 |
| Isanti County | Zone 2 |
| Itasca County | Zone 2 |
| Jackson County | Zone 1 |
| Kanabec County | Zone 1 |
| Kandiyohi County | Zone 1 |
| Kittson County | Zone 1 |
| Koochiching County | Zone 2 |
| Lac qui Parle County | Zone 1 |
| Lake County | Zone 2 |
| Lake of the Woods County | Zone 2 |
| Le Sueur County | Zone 1 |
| Lincoln County | Zone 1 |
| Lyon County | Zone 1 |
| Mahnomen County | Zone 1 |
| Marshall County | Zone 1 |
| Martin County | Zone 1 |
| McLeod County | Zone 1 |
| Meeker County | Zone 1 |
| Mille Lacs County | Zone 2 |
| Morrison County | Zone 2 |
| Mower County | Zone 1 |
| Murray County | Zone 1 |
| Nicollet County | Zone 1 |
| Nobles County | Zone 1 |
| Norman County | Zone 1 |
| Olmsted County | Zone 1 |
| Otter Tail County | Zone 1 |
| Pennington County | Zone 1 |
| Pine County | Zone 2 |
| Pipestone County | Zone 1 |
| Polk County | Zone 1 |
| Pope County | Zone 1 |
| Ramsey County | Zone 1 |
| Red Lake County | Zone 1 |
| Redwood County | Zone 1 |
| Renville County | Zone 1 |
| Rice County | Zone 1 |
| Rock County | Zone 1 |
| Roseau County | Zone 1 |
| Scott County | Zone 1 |
| Sherburne County | Zone 1 |
| Sibley County | Zone 1 |
| St. Louis County | Zone 2 |
| Stearns County | Zone 1 |
| Steele County | Zone 1 |
| Stevens County | Zone 1 |
| Swift County | Zone 1 |
| Todd County | Zone 1 |
| Traverse County | Zone 1 |
| Wabasha County | Zone 1 |
| Wadena County | Zone 1 |
| Waseca County | Zone 1 |
| Washington County | Zone 1 |
| Watonwan County | Zone 1 |
| Wilkin County | Zone 1 |
| Winona County | Zone 1 |
| Wright County | Zone 1 |
| Yellow Medicine County | Zone 1 |
County names follow the 2020 Census. Zones from the EPA Map of Radon Zones (text version). Rows marked “zone of” use the zone EPA gave the predecessor or surrounding county.
Next steps: read how to test your home, check a result with the level calculator, or look up a single address by ZIP code.