Michigan Department of Environment, Great Lakes, and Energy (EGLE) · Indoor Radon Program
Michigan radon (air)
No state company roster to republish. Updated / retrieved 2026-10-05 (US/Pacific).
If you are not sure you need a pro yet, see when a DIY radon test kit is enough or how to test a home for radon.
Michigan does not license or regulate radon testers or radon mitigation contractors, and EGLE does not publish a public statewide list of them to republish. This page does not invent company names, phones, licenses, or addresses to fill that gap.
Who to hire: EGLE encourages hiring someone certified by one of the two national programs: NRPP Find a Pro or NRSB Find a Professional. EGLE says its Indoor Radon Program or your local health department can also provide lists of NRPP/NRSB-certified measurement and mitigation providers on request, but points to the national sites for the most complete and up-to-date information.
Buyer beware: EGLE states it has no regulatory authority over radon contractors and does not audit or inspect their work. It suggests getting more than one estimate, asking for references, and comparing proposals against the ANSI/AARST radon standards.
What EGLE says Michigan homeowners can do
- EGLE says about one in four Michigan homes is expected to have radon above the federal action level, and elevated levels have been found in all 83 Michigan counties. EGLE publishes a county map of elevated test results (based on over 200,000 homeowner tests) and an interactive ZIP-code results map. Your neighbor’s result is not a substitute for testing your own home.
- EGLE recommends retesting about every two years, because homes settle and new foundation cracks can change radon entry.
- If a test shows 4 pCi/L or higher, confirm it with a follow-up test; EPA recommends a mitigation system when levels are confirmed at or above that level.
- EGLE says a Michigan radon mitigation system generally costs about $800 to $2,500, depending on location and contractor, and can usually be installed in a day or less.
- Test kits: EGLE lists county and city health departments and some MSU Extension offices that offer kits on its Find a radon test kit page; kits are also sold in hardware and home stores. This index does not copy that office table.
- New homes: the Michigan Residential Building Code requires radon-resistant construction in nine counties (Branch, Calhoun, Cass, Hillsdale, Jackson, Kalamazoo, Lenawee, St. Joseph, and Washtenaw), and EGLE recommends it statewide.
- Questions: EGLE Indoor Radon hotline 800-723-6642 (800-RADONGAS) or Radon@Michigan.gov (as printed on the EGLE pages).
- EGLE also covers radon in well water separately; this index page covers indoor air only.
Official sources
- EGLE — Michigan Indoor Radon Program (retrieved 2026-10-05; primary hub)
- EGLE — Radon Measurement and Mitigation Contractors (retrieved 2026-10-05; states Michigan does not license or regulate radon contractors)
- EGLE — Indoor Radon Program Overview (retrieved 2026-10-05)
- EGLE — Finding and Using a Radon Test Kit (retrieved 2026-10-05)
- NRPP Find a Pro (linked from EGLE)
- NRSB Find a Professional (linked from EGLE)
- U.S. EPA Radon
This index does not rank contractors or take referral fees. No Amazon kit links on this state page. This page covers indoor air only, not well water.