Is Crawford County, MI a radon risk area?

EPA's own radon map rates Crawford County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. That puts Crawford County in the 9th percentile nationally for radon potential — higher than 9% of the counties EPA has rated.

Crawford County by the numbers

About 13,599 people live in Crawford County, Michigan, spread over 556.418 square miles. That works out to roughly 24 people per square mile. Rank 740 by population within its EPA zone puts Crawford County at the 28th percentile among zone peers. Crawford County falls in EPA Radon Region 5, one of 524 counties nationally EPA assigns to that same geologic province.

Why the zone isn't the answer by itself

Crawford County's predicted average sits below the national indoor average of about 1.3 pCi/L, well under EPA's 4 pCi/L action level. A Zone 3 rating means Crawford County's county-wide average is predicted low, but EPA is explicit that a meaningful share of homes in low-potential zones still test above the action level — a low zone is not a reason to skip testing.

Next steps for a home in Crawford County

Nothing about Crawford County's EPA zone changes the mitigation number: $800–$2,500 nationally (around $1,200 typical), set by the house's foundation rather than the county it sits in — and only relevant once a test actually clears 4 pCi/L.

Find Michigan's state radon program

Crawford County's test kit answers today; a Airthings radon monitor keeps answering for Crawford County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. Code RADONZONE-10OFF takes 10% off at checkout.

More on how this number was built

Crawford County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.