Radon Levels Across Minnesota
- Maxwell Martinson
- Jul 30
- 9 min read
Minnesota has higher average radon levels than most other states in America. Our average radon level is over three times higher than the national average (MN Dept. of Health).
The EPA recommends reducing home radon if your level is at or above 4.0 pCi/L. Minnesota’s average level is 4.2 pCi/L, whereas the national average is 1.3 pCi/L.
Some research suggests that levels above 2.0 pCi/L warrant action to protect you and your family’s respiratory health. This means that all Minnesotan homeowners should have their home air tested for radon.
An Overview of Radon in Minnesota
Radon is measured in “pCi/L”, which stands for picocuries per liter. “Curies” are a unit of measurement for radioactivity, and since radon is a radioactive gas, we can track its levels based on the radiation it emits.
The radioactive particles radon emits can cause lung damage and, potentially, much higher chances of developing lung cancer. Radon exposure is the second-leading cause of lung cancer behind smoking, and Minnesota’s average picocuries per liter is over three times the average U.S. radon level.
Radon Levels in Minnesota Counties, Alphabetically
As you'll see below, many of the counties in Minnesota have tested highly for radon levels. What is normal in Minnesota is high in other areas around the country, which reinforces the need for families to test their homes for radon levels.
The information below was taken from the MN Department of Health's radon map which gathered information on radon levels from 2010 to 2020. If you see that your county tested with high radon levels, be sure to contact us for a free estimate.
Aitkin County
Radon Exposure Risk: Moderate-Low
About 32.5% of homes in Aitkin County test above 4.0 pCi/L, the EPA’s action level for radon. Testing is advisable, especially in older homes or basements.
Anoka County
Radon Exposure Risk: Low
Only 16.2% of homes in Anoka County test above 4.0 pCi/L. Risk is relatively low, but testing is still the only way to be sure.
Becker County
Radon Exposure Risk: Moderate
50.2% of homes tested exceed the EPA’s action level. A home radon test is strongly encouraged.
Beltrami County
Radon Exposure Risk: Moderate-Low
40.8% of homes in Beltrami County tested high for radon. Regular testing is a smart precaution.
Benton County
Radon Exposure Risk: Moderate-Low
Roughly 29.3% of homes exceed safe levels. While not high risk, Benton residents should still consider testing.
Big Stone County
Radon Exposure Risk: High-Moderate
62.0% of homes tested above the danger threshold. Radon mitigation is likely needed in many homes here.
Blue Earth County
Radon Exposure Risk: High-Moderate
With 59.5% of homes testing high, Blue Earth residents should take action to test and mitigate.
Brown County
Radon Exposure Risk: High
A significant 71.5% of homes in Brown County test above 4.0 pCi/L. Radon testing is highly recommended.
Carlton County
Radon Exposure Risk: Moderate-Low
41.7% of homes tested above the danger level. Home testing is a proactive safety measure here.
Carver County
Radon Exposure Risk: Moderate-Low
About 39.1% of Carver homes test high for radon. While not the highest risk, testing is still wise.
Cass County
Radon Exposure Risk: Moderate-Low
34.4% of homes exceed the EPA’s safe limit. Testing is recommended, especially in lower levels of homes.
Chippewa County
Radon Exposure Risk: High-Moderate
Nearly 70% of homes tested above 4.0 pCi/L. Radon levels are a serious concern in this area.
Chisago County
Radon Exposure Risk: Moderate-Low
30.4% of homes tested high for radon. That’s enough to warrant testing in most households.
Clay County
Radon Exposure Risk: High-Moderate
60.2% of homes tested exceeded the EPA threshold. Radon mitigation may be necessary in many homes.
Clearwater County
Radon Exposure Risk: Moderate
47.2% of tested homes showed elevated radon levels. Testing is encouraged across the county.
Cook County
Radon Exposure Risk: Moderate-Low
40.6% of homes tested above safe levels. Residents should consider a radon test kit.
Cottonwood County
Radon Exposure Risk: High
An alarming 70.8% of homes tested unsafe. Testing and mitigation should be a priority here.
Crow Wing County
Radon Exposure Risk: Moderate-Low
Only 27.6% of homes tested high. Still, testing is the only way to know your home is safe.
Dakota County
Radon Exposure Risk: Moderate-Low
37.3% of homes tested above 4.0 pCi/L. Testing is recommended, especially in older homes.
Dodge County
Radon Exposure Risk: High-Moderate
64.1% of tested homes had dangerous radon levels. Professional testing is strongly advised.
Douglas County
Radon Exposure Risk: High-Moderate
With 61.6% of homes exceeding safe levels, radon exposure is a widespread concern in Douglas.
Faribault County
Radon Exposure Risk: High-Moderate
64.2% of homes are above the EPA’s danger level. If you live here, test your home immediately.
Fillmore County
Radon Exposure Risk: High-Moderate
62.4% of homes tested high for radon. Testing and possible mitigation are recommended.
Freeborn County
Radon Exposure Risk: High-Moderate
68.1% of homes tested unsafe. This is among the higher-risk counties in Minnesota.
Goodhue County
Radon Exposure Risk: Moderate
54.9% of homes tested above the recommended action level. Testing is strongly encouraged.
Grant County
Radon Exposure Risk: High-Moderate
66.4% of homes exceed safe limits. Testing is an important health precaution here.
Hennepin County
Radon Exposure Risk: Moderate-Low
38.0% of homes tested high for radon. While lower than some counties, it's still worth testing.
Houston County
Radon Exposure Risk: Moderate
52.5% of homes are above safe levels. Testing should be a routine part of home maintenance.
Hubbard County
Radon Exposure Risk: Moderate-Low
39.3% of homes tested above EPA guidelines. Testing is advisable.
Isanti County
Radon Exposure Risk: Low
Only 16.0% of homes tested high for radon. Testing is still recommended, especially in basement-heavy homes.
Itasca County
Radon Exposure Risk: Moderate-Low
30.8% of homes tested above action levels. Testing is a smart precaution.
Jackson County
Radon Exposure Risk: High
An overwhelming 73.8% of homes tested unsafe. Radon testing and mitigation are urgent in this area.
Kanabec County
Radon Exposure Risk: Moderate-Low
44.5% of homes tested above the EPA action level. Residents should strongly consider home testing.
Kandiyohi County
Radon Exposure Risk: High-Moderate
68.8% of homes exceed safe radon levels. Testing is highly recommended for all homeowners.
Kittson County
Radon Exposure Risk: Low
Only 27.1% of homes tested high. While risk is lower here, testing is still the only way to be certain.
Koochiching County
Radon Exposure Risk: Moderate-Low
31.0% of homes tested above 4.0 pCi/L. Testing is recommended as a precaution.
Lac qui Parle County
Radon Exposure Risk: High-Moderate
65.9% of homes tested above the EPA danger level. Home testing should be a priority.
Lake County
Radon Exposure Risk: Low
Only 25.4% of homes had elevated radon levels. Still, testing is advised to confirm safety.
Lake of the Woods County
Radon Exposure Risk: Moderate-Low
About 35.3% of homes tested high. Testing is recommended, especially in basements or older homes.
Le Sueur County
Radon Exposure Risk: High-Moderate
62.3% of homes exceed safe radon levels. This county is at elevated risk—testing is essential.
Lincoln County
Radon Exposure Risk: High-Moderate
69.8% of homes tested above 4.0 pCi/L. Nearly 7 in 10 homes are at risk—testing is highly recommended.
Lyon County
Radon Exposure Risk: High-Moderate
63.8% of homes tested high for radon. Testing and mitigation are often necessary here.
Mahnomen County
Radon Exposure Risk: Moderate
57.7% of homes exceeded EPA guidelines. Testing is strongly encouraged.
Marshall County
Radon Exposure Risk: Moderate
53.3% of homes tested unsafe. Residents should test their homes and consider mitigation if needed.
Martin County
Radon Exposure Risk: High-Moderate
64.2% of homes tested above safe levels. Testing should be a top priority.
McLeod County
Radon Exposure Risk: High-Moderate
61.9% of homes exceed the danger threshold. Testing and radon system installation may be necessary.
Meeker County
Radon Exposure Risk: Moderate
55.4% of homes tested above the action level. Testing is important for health and safety.
Mille Lacs County
Radon Exposure Risk: Low
Only 28.7% of homes tested above the danger zone. Testing is still recommended.
Morrison County
Radon Exposure Risk: Moderate-Low
37.5% of homes showed high radon. Testing is wise, especially in older properties.
Mower County
Radon Exposure Risk: Moderate
47.9% of homes exceed EPA guidelines. Testing should be considered a necessity.
Murray County
Radon Exposure Risk: High
A striking 79.7% of homes tested high—among the highest in Minnesota. Testing is critical here.
Nicollet County
Radon Exposure Risk: High-Moderate
60.0% of homes exceed safe levels. Testing is highly encouraged.
Nobles County
Radon Exposure Risk: High
73.5% of homes test dangerously high. If you live here, don’t delay radon testing.
Norman County
Radon Exposure Risk: Moderate
56.6% of homes tested above the action level. Homeowners should test and consider mitigation.
Olmsted County
Radon Exposure Risk: Moderate
48.6% of homes are above the EPA limit. Even in urban areas, testing is essential.
Otter Tail County
Radon Exposure Risk: Moderate
59.1% of homes tested above the EPA's action level. Homeowners are strongly encouraged to test for radon.
Pennington County
Radon Exposure Risk: Moderate
58.8% of homes tested high. Testing is a smart and important health step for residents.
Pine County
Radon Exposure Risk: Low
Only 29.3% of homes tested above 4.0 pCi/L. While risk is lower, testing is still recommended.
Pipestone County
Radon Exposure Risk: High-Moderate
68.2% of homes tested high. Testing and mitigation may be necessary in many households.
Polk County
Radon Exposure Risk: High
70.0% of homes exceed the EPA limit. This county has one of the highest risks—test your home today.
Pope County
Radon Exposure Risk: Moderate
50.5% of homes tested above the action level. Radon testing is strongly advised.
Ramsey County
Radon Exposure Risk: Low
Only 29.4% of homes tested above 4.0 pCi/L. Still, testing is the only way to ensure safety.
Red Lake County
Radon Exposure Risk: Moderate-Low
42.0% of homes tested high. Testing is recommended, especially in basements or older homes.
Redwood County
Radon Exposure Risk: High-Moderate
69.3% of homes exceeded safe limits. Radon testing and potential mitigation are advised.
Renville County
Radon Exposure Risk: High
74.1% of homes tested above the danger threshold. Testing should be a priority for homeowners.
Rice County
Radon Exposure Risk: Moderate
58.6% of homes exceeded safe limits. Testing is important for long-term health protection.
Rock County
Radon Exposure Risk: High
A staggering 78.6% of homes tested above 4.0 pCi/L. Testing and mitigation are critical here.
Roseau County
Radon Exposure Risk: Low
Only 29.7% of homes exceeded safe radon levels. Lower risk, but testing is still advised.
Scott County
Radon Exposure Risk: Moderate-Low
43.6% of homes tested above the EPA action level. Testing is a smart precaution for families.
Sherburne County
Radon Exposure Risk: Moderate-Low
35.8% of homes exceeded safe levels. Testing is recommended across the county.
Sibley County
Radon Exposure Risk: High-Moderate
66.9% of homes tested high. Testing and radon system installation may be needed.
St. Louis County
Radon Exposure Risk: Low
Only 27.0% of homes tested above 4.0 pCi/L. Still, radon can vary house to house—testing is encouraged
Stearns County
Radon Exposure Risk: Moderate-Low
49.4% of homes exceeded the EPA threshold. Consider testing your home to be sure.
Steele County
Radon Exposure Risk: High-Moderate
61.1% of homes tested high. Residents should prioritize radon testing and possible mitigation.
Stevens County
Radon Exposure Risk: High-Moderate
60.7% of homes tested above 4.0 pCi/L. Testing is highly recommended in this area.
Swift County
Radon Exposure Risk: Moderate
57.1% of homes exceed the action level. Homeowners should test to ensure indoor air safety.
Todd County
Radon Exposure Risk: Moderate-Low
43.3% of homes tested high. Testing is advisable, particularly in older or rural properties.
Traverse County
Radon Exposure Risk: High-Moderate
62.8% of homes tested unsafe. Radon levels here are concerning—testing is essential.
Wabasha County
Radon Exposure Risk: High-Moderate
64.7% of homes exceed the EPA guideline. If you live here, testing is strongly encouraged.
Wadena County
Radon Exposure Risk: Low
Only 29.6% of homes tested above 4.0 pCi/L. Risk is low, but testing is still the only way to know.
Waseca County
Radon Exposure Risk: High-Moderate
61.2% of homes tested high. Testing and mitigation may be necessary in many homes.
Washington County
Radon Exposure Risk: Moderate-Low
31.2% of homes exceed EPA limits. Testing is recommended, especially in lower levels.
Watonwan County
Radon Exposure Risk: High-Moderate
61.1% of homes tested high. Residents should strongly consider radon testing.
Wilkin County
Radon Exposure Risk: Moderate-Low
47.1% of homes tested above the danger level. Testing is a smart safety measure.
Winona County
Radon Exposure Risk: Moderate-Low
46.5% of homes exceed the EPA threshold. Home testing is highly recommended.
Wright County
Radon Exposure Risk: Moderate-Low
47.3% of homes tested above 4.0 pCi/L. Testing is strongly encouraged.
Yellow Medicine County
Radon Exposure Risk: High-Moderate
65.1% of homes tested high. Testing and mitigation are strongly advised in this region.
Is Your County At Risk of Radon Exposure?
If you’re looking for a reliable, affordable radon mitigation expert to test your home and inform you on your next steps, you’re in the right place. Just because your county is in a high-risk area doesn’t mean that your home is high risk.
There’s only one way to find out. Contact us for a radon testing today.
