Is Schoolcraft County, MI a radon risk area?

EPA's own radon map rates Schoolcraft County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Nationally, Schoolcraft County ranks higher in radon potential than 5% of rated counties (the 5th percentile).

How Schoolcraft County compares

About 8,178 people live in Schoolcraft County, Michigan, spread over 1,171.876 square miles. Averaged across its land area, Schoolcraft County runs about 7 people per square mile. Rank 872 by population within its EPA zone puts Schoolcraft County at the 15th percentile among zone peers. Schoolcraft 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

Schoolcraft 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 Schoolcraft 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.

If Schoolcraft County tests above the action level

Nothing about Schoolcraft 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

Schoolcraft County's test kit answers today; a Airthings radon monitor keeps answering for Schoolcraft 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

Schoolcraft County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. Whatever zone Schoolcraft County carries, the zone explainer covers what it does and doesn't tell you about any one house.