Radon Testing in Flint, MI
48-hour EPA-protocol testing. Calibrated continuous monitors. Mitigation guidance if levels are high.
Radon is a naturally occurring radioactive gas produced by the breakdown of uranium in soil, and it's the second leading cause of lung cancer in the United States after smoking. You can't see it, smell it, or taste it — the only way to know whether your home has a radon problem is to test. Mike's Complete Home Inspection provides EPA-protocol radon testing throughout Flint, Genesee County, and the surrounding Mid-Michigan region using calibrated continuous radon monitors, with hourly data rather than single-point snapshots and written results you can hand to a mitigation contractor if the level exceeds 4.0 pCi/L.
What's included
Calibrated continuous monitors
We deploy professional-grade continuous radon monitors (not passive charcoal kits) that record radon concentration hourly for 48+ hours — far more reliable than a single average number.
EPA-protocol placement
Monitors are placed in the lowest livable level of the home, away from drafts, exterior walls, and HVAC registers. Closed-house conditions are verified in advance.
Written results with action guidance
A written report delivered alongside your inspection report, with clear guidance on whether mitigation is recommended and what a Michigan mitigation system typically costs.
Short-term and long-term options
48-hour testing is standard during a real-estate transaction. Long-term testing (90+ days) is available for homeowners who want a seasonal average.
Why it matters for Flint-area homes
- •The EPA places most of Lower Michigan — including Genesee, Lapeer, Shiawassee, and Oakland Counties — in Zone 2 (moderate) or Zone 1 (high) radon zones. Zone 1 counties have predicted average indoor levels above the EPA action threshold.
- •Michigan DHHS testing data consistently shows that roughly 1 in 8 Michigan homes tested above the 4.0 pCi/L action level — and certain Flint-area neighborhoods run substantially higher.
- •Homes with basements, crawlspaces, or slab-on-grade construction can all have radon problems; the soil beneath the house matters far more than the construction type.
- •Heating-season testing (fall through early spring) tends to produce the highest readings because homes are sealed up; testing during real-estate transactions needs to account for this.
How it works
- 1
Add to your inspection
Radon testing is usually added to a home inspection booking. Monitor deployment takes about 15 minutes at the end of the inspection visit.
- 2
48-hour closed-house test
The home must remain in closed-house conditions (windows closed, HVAC on normal operation) for at least 12 hours before and during the test.
- 3
Pickup and results
We return to retrieve the monitor, pull the hourly data, and deliver a written report. If mitigation is warranted, we can recommend reputable Michigan mitigators.
Frequently asked
What is an unsafe radon level?
The EPA recommends mitigation at 4.0 pCi/L or higher, and consideration of mitigation between 2.0 and 4.0 pCi/L. Lower is always better — there is no completely safe level.
How much does radon mitigation cost in Michigan?
Typical active sub-slab depressurization systems in the Flint area run $1,200–$2,200 installed. Crawlspace systems and complex foundations cost more.
Can radon testing be part of the inspection contingency?
Yes — most purchase agreements allow radon testing as part of the inspection contingency window, giving you leverage to negotiate mitigation before closing.