Radon Levels in Michigan
Michigan is classified as an EPA Zone 2 state with a moderate risk for radon. Average indoor radon levels range from 1 to 4 pCi/L, and approximately 18% of Michigan homes test above the EPA action level of 4.0 pCi/L.
Michigan Radon Summary
Key Facts About Radon in Michigan
- Michigan's Upper Peninsula has higher radon levels than the Lower Peninsula
- Glacial deposits throughout the state contain radium-bearing sediments
- Michigan EGLE administers the state radon program
Michigan Testing Requirements & Recommendations
Michigan recommends testing. No statewide mandate.
Standard mitigation approaches work well throughout Michigan's varied geology.
Major Cities in Michigan
Radon levels can vary significantly within Michigan 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 Michigan 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 Michigan. 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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