Radon Levels in Minnesota
Minnesota is classified as an EPA Zone 1 state with a very high risk for radon. Average indoor radon levels range from 3 to 8 pCi/L, and approximately 40% of Minnesota homes test above the EPA action level of 4.0 pCi/L.
Minnesota Radon Summary
High Radon Risk State
Minnesota is among the higher-risk states for residential radon. The Minnesota Department of Health strongly recommends that all residents test their homes. If you have not tested your home, consider ordering a test kit or radon detector today.
Key Facts About Radon in Minnesota
- Minnesota is one of the highest-risk radon states in the US
- The Minnesota Department of Health has run an active radon program since the 1980s
- Minnesota is a leader in radon-resistant new construction requirements
- The granite-rich geology of northern Minnesota is a primary radon source
Minnesota Testing Requirements & Recommendations
Minnesota requires disclosure of known radon test results in home sales. The state provides free or discounted test kits through local health departments.
Minnesota has one of the most well-developed radon mitigation industries in the country.
Major Cities in Minnesota
Radon levels can vary significantly within Minnesota depending on local geology. All residents — regardless of city — should test their specific home, as neighborhood-level radon varies independently of broader state and county averages.
What Should Minnesota Residents Do?
Test Your Home
Use a short-term charcoal test kit ($15–$25) for an initial reading, or a continuous radon detector for ongoing monitoring. Test in your basement or lowest livable area.
Understand Your Result
If your result is below 2.0 pCi/L: monitor periodically. Between 2.0–4.0 pCi/L: consider mitigation. Above 4.0 pCi/L: the EPA recommends mitigation. Above 8.0 pCi/L: take action promptly.
Hire a Certified Contractor if Needed
Look for NRPP or NRSB-certified radon mitigation contractors in Minnesota. Mitigation systems typically cost $800–$2,500 and can reduce radon levels by 50–99%.
Verify with a Follow-Up Test
After mitigation, test again to confirm the system is working. Retest every 2 years, or after significant home renovations.
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