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State overview
Radon in Michigan
Of Michigan's 83 counties and county equivalents, EPA places 9 in Zone 1, 32 in Zone 2, 42 in Zone 3. Zones are county-wide predictions; testing is the only way to know your home's level.
Radon in the news
Michigan stories
- Health officials urge Michigan residents to test their homes for radonWILX · 2026-01-26
- Farmington Hills student wins Michigan Radon Poster ContestThe Oakland Press · 2026-01-15
- Here's how you might be able to get a free radon test kit in MichiganWCMU Public Media · 2025-01-29
- Michigan radon specialist says more tests are needed in DetroitWDET 101.9 FM · 2024-01-16
- 1 in 4 Michigan homes expected to have unhealthy radon levels; see average in your zip codeMLive.com · 2024-01-16
Headlines link to the original publishers via Google News. Updated 2026-10-27.
All 83 counties
Source: EPA radon zones spreadsheet (EPA 402/A-16/001).