Radon levels in Minnesota: Moderate

The model predicts a population-weighted basement average of 2.4 pCi/L across Minnesota's 87 counties - about 1.4× the US average of 1.8 pCi/L. Above-ground floors average 1.7 pCi/L.

Predicted (model estimate). The pCi/L figures on this page are long-term area averages from a peer-reviewed national model built on millions of real radon tests (2001-2021). They describe the typical home in this area - not your home, which can be several times higher or lower. The EPA radon zone is a separate, 1993 county-level classification. How the numbers work.

68 / 87

EPA Zone 1 counties (78%)

19 / 0

Zone 2 / Zone 3 counties

9

counties predicted ≥ 4 pCi/L

8.6%

of ZIP codes predicted ≥ 4 pCi/L

Minnesota counties by predicted radon

Sorted highest to lowest predicted basement average. 87 counties.

CountyPredicted basementUpstairsGradeEPA zoneZIPs
Rock County4.7 pCi/L2.6HighEPA Zone 19
Murray County4.4 pCi/L2.5HighEPA Zone 17
Lincoln County4.3 pCi/L2.5HighEPA Zone 16
Nobles County4.3 pCi/L2.3HighEPA Zone 110
Jackson County4.2 pCi/L2.3HighEPA Zone 16
Pipestone County4.2 pCi/L2.4HighEPA Zone 15
Renville County4.1 pCi/L2.4HighEPA Zone 110
Cottonwood County4.1 pCi/L2.4HighEPA Zone 16
Lac qui Parle County4.0 pCi/L2.4HighEPA Zone 15
Lyon County4.0 pCi/L2.1ModerateEPA Zone 19
Redwood County3.9 pCi/L2.3ModerateEPA Zone 114
Yellow Medicine County3.9 pCi/L2.4ModerateEPA Zone 17
Brown County3.9 pCi/L2.4ModerateEPA Zone 15
Polk County3.9 pCi/L2.1ModerateEPA Zone 116
Martin County3.8 pCi/L2.3ModerateEPA Zone 110
Chippewa County3.8 pCi/L2.3ModerateEPA Zone 15
Fillmore County3.7 pCi/L2.7ModerateEPA Zone 111
Watonwan County3.7 pCi/L2.3ModerateEPA Zone 15
Faribault County3.6 pCi/L2.3ModerateEPA Zone 19
Traverse County3.6 pCi/L2.3ModerateEPA Zone 13
Douglas County3.6 pCi/L2.2ModerateEPA Zone 18
Big Stone County3.6 pCi/L2.2ModerateEPA Zone 16
Freeborn County3.6 pCi/L2.1ModerateEPA Zone 110
Stevens County3.6 pCi/L2.3ModerateEPA Zone 15
Sibley County3.5 pCi/L2.3ModerateEPA Zone 16
Waseca County3.5 pCi/L2.4ModerateEPA Zone 14
Kandiyohi County3.5 pCi/L2.4ModerateEPA Zone 111
Wabasha County3.5 pCi/L2.4ModerateEPA Zone 18
Clay County3.5 pCi/L2.1ModerateEPA Zone 110
Grant County3.4 pCi/L2.1ModerateEPA Zone 17
Steele County3.4 pCi/L2.1ModerateEPA Zone 14
Houston County3.3 pCi/L2.4ModerateEPA Zone 17
Dodge County3.3 pCi/L2.3ModerateEPA Zone 16
Norman County3.3 pCi/L2.0ModerateEPA Zone 18
Marshall County3.3 pCi/L1.9ModerateEPA Zone 19
McLeod County3.2 pCi/L1.9ModerateEPA Zone 18
Goodhue County3.2 pCi/L2.2ModerateEPA Zone 110
Winona County3.2 pCi/L2.0ModerateEPA Zone 18
Nicollet County3.2 pCi/L2.2ModerateEPA Zone 15
Blue Earth County3.2 pCi/L2.3ModerateEPA Zone 112
Red Lake County3.2 pCi/L1.9ModerateEPA Zone 14
Swift County3.2 pCi/L2.0ModerateEPA Zone 16
Mahnomen County3.2 pCi/L1.8ModerateEPA Zone 15
Meeker County3.2 pCi/L2.1ModerateEPA Zone 17
Rice County3.2 pCi/L2.0ModerateEPA Zone 18
Kittson County3.1 pCi/L1.9ModerateEPA Zone 18
Otter Tail County3.1 pCi/L1.9ModerateEPA Zone 120
Pope County3.1 pCi/L1.9ModerateEPA Zone 18
Le Sueur County3.1 pCi/L2.2ModerateEPA Zone 19
Wilkin County3.1 pCi/L2.0ModerateEPA Zone 17
Becker County3.0 pCi/L1.8ModerateEPA Zone 19
Olmsted County2.9 pCi/L1.9ModerateEPA Zone 110
Todd County2.9 pCi/L1.9ModerateEPA Zone 111
Wadena County2.9 pCi/L1.8ModerateEPA Zone 14
Mower County2.8 pCi/L1.9ModerateEPA Zone 114
Pennington County2.8 pCi/L1.3ModerateEPA Zone 13
Clearwater County2.7 pCi/L1.6ModerateEPA Zone 26
Stearns County2.6 pCi/L1.9ModerateEPA Zone 119
Wright County2.6 pCi/L2.0ModerateEPA Zone 112
Hubbard County2.6 pCi/L1.7ModerateEPA Zone 15
Cass County2.5 pCi/L1.4ModerateEPA Zone 213
Morrison County2.4 pCi/L1.4ModerateEPA Zone 29
Beltrami County2.4 pCi/L1.0ModerateEPA Zone 212
Sherburne County2.3 pCi/L1.8ModerateEPA Zone 16
Roseau County2.3 pCi/L1.1ModerateEPA Zone 17
Carlton County2.3 pCi/L1.1ModerateEPA Zone 211
Kanabec County2.3 pCi/L1.2ModerateEPA Zone 14
Itasca County2.3 pCi/L1.1ModerateEPA Zone 218
Chisago County2.3 pCi/L1.8ModerateEPA Zone 29
Scott County2.3 pCi/L1.7ModerateEPA Zone 17
Benton County2.3 pCi/L1.3ModerateEPA Zone 24
Cook County2.3 pCi/L1.5ModerateEPA Zone 26
Pine County2.2 pCi/L1.4ModerateEPA Zone 211
Hennepin County2.2 pCi/L1.6ModerateEPA Zone 164
Carver County2.2 pCi/L1.8ModerateEPA Zone 112
Crow Wing County2.2 pCi/L1.0ModerateEPA Zone 212
Dakota County2.1 pCi/L1.6ModerateEPA Zone 118
Aitkin County2.1 pCi/L1.1ModerateEPA Zone 29
Mille Lacs County2.1 pCi/L1.4ModerateEPA Zone 26
Koochiching County2.0 pCi/L1.0ModerateEPA Zone 27
Ramsey County2.0 pCi/L1.4ModerateEPA Zone 119
Isanti County2.0 pCi/L1.4ModerateEPA Zone 24
Lake of the Woods County2.0 pCi/L1.2LowEPA Zone 23
Washington County1.9 pCi/L1.5LowEPA Zone 115
Lake County1.9 pCi/L1.0LowEPA Zone 25
St. Louis County1.8 pCi/L1.0LowEPA Zone 239
Anoka County1.8 pCi/L1.4LowEPA Zone 214

Minnesota radon questions

Is radon high in Minnesota?
Minnesota's population-weighted predicted basement average is 2.4 pCi/L, about 1.4× the US average of 1.8. 9 of its 87 modeled counties are predicted at or above the EPA action level of 4 pCi/L, 73 are in the 2-4 "consider fixing" range and 5 are below 2. 8.6% of Minnesota ZIP codes are predicted at 4 or higher.
Which Minnesota county has the highest radon?
Rock County has the highest predicted basement average in Minnesota at 4.7 pCi/L (EPA Zone 1). The lowest is Anoka County at 1.8 pCi/L. These are modeled area averages; individual homes in any county can test far higher.
How many EPA Zone 1 counties are in Minnesota?
68 of Minnesota's 87 counties (78%) are EPA Zone 1 (highest potential), 19 are Zone 2 and 0 are Zone 3. The EPA zone map dates from 1993; the predicted values on this page come from a 2001-2021 model built on millions of actual tests, so the two can disagree for a given county.
Should I test for radon in Minnesota?
Yes - with some urgency. Minnesota's predicted average is in the moderate range, and 84.7% of its ZIP codes are predicted at 2 pCi/L or higher. A short-term charcoal kit or a continuous digital monitor will tell you your actual level within days.

Minnesota radon program

Many states offer free or discounted test kits and keep lists of certified mitigators. Find the Minnesota radon office through the EPA state radon contacts page. Then read how to test and what mitigation costs.