Radon in Water Testing Labs in Michigan (6 state-certified labs)

How many labs test for radon in water in Michigan

6 labs on Michigan's official drinking-water lab list are certified to test for radon in water. All 6 are named for radon in water on the list. None of them is marked as taking samples from the public. Call a lab before you send a sample. 6 are located outside Michigan.

The list is published by the Michigan Department of Environment, Great Lakes, and Energy (EGLE) - Laboratory Certification Program. List versions on file: 9/8/2025 (out-of-state, radiological, out-of-state PFAS lists); 9/8/2025 (out-of-state, radiological, out-of-state PFAS, Cryptosporidium lists); 9/8/2025 (radiological list). Fetched 2026-11-15 (UTC).

Old list. EGLE's out-of-state, radiological, in-state PFAS, out-of-state PFAS and Cryptosporidium lists are dated 9/8/2025, more than 12 months before we fetched them on Nov 2, 2026, though EGLE's program page still links them. Labs and analytes on them may have changed since. EGLE's chemistry, microbiological and lead and copper lists (3/11/2026) are not affected.

Michigan labs certified for radon in water

How the Michigan list marks public samples (whole list). Not stated per lab on the lists. Marked yes only for EGLE's own laboratory (its Drinking Water Laboratory page says "Drinking water from public water supplies and private residential wells can be tested") and for the health departments and laboratory that EGLE's Private Residential Water Well Testing page names under "Testing options: These health departments have onsite testing capabilities." EGLE's drinking water testing page tells well owners: "To locate a private laboratory in your area, visit our Laboratory Certification Program page and select the laboratory list you're most interested in."

Before you send a sample, call the lab to confirm it is currently certified for the exact test and method, that it accepts samples from homeowners, and how to collect and ship them. Status can change between list updates.

Why test for radon in water in Michigan

Most of the risk from radon in a well comes from breathing the gas the water releases indoors, not from drinking it. Read our radon in water explainer.

EPA's radon zone map puts 9 of Michigan's 83 counties in Zone 1 (highest potential), 32 in Zone 2 and 42 in Zone 3. [1] That map is about radon in indoor air, and EPA says it should not be used to decide whether an individual home needs testing. If radon is found in your air and you have a well, EPA suggests testing the water too.

About 2,597,314 people in Michigan used private wells in 2015, by the USGS estimate of people on domestic self-supplied water. [2] Federal limits are written for public water systems, not private wells, so testing is up to the owner.

For tests that depend on your home (farms nearby, old plumbing, a new baby), use the which-tests checklist. When results arrive, check your numbers against EPA's limits. State guidance, county data and every lab: Michigan.

Other tests in Michigan