Is Ogemaw County, MI a radon risk area?

Ogemaw County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Nationally, Ogemaw County ranks higher in radon potential than 14% of rated counties (the 14th percentile).

Ogemaw County by the numbers

About 20,985 people live in Ogemaw County, Michigan, spread over 563.506 square miles. That works out to roughly 37 people per square mile. Rank 595 by population within its EPA zone puts Ogemaw County at the 42nd percentile among zone peers. Geologically, Ogemaw County is grouped into EPA Region 5 alongside 523 other counties that share its rock and soil setting.

Why the zone isn't the answer by itself

A Zone 3 county like Ogemaw County is predicted closer to the 0.4 pCi/L typical outdoors than to EPA's 4 pCi/L action level. Low doesn't mean zero: EPA's own data shows homes in Zone 3 counties like Ogemaw County testing above the action level often enough that skipping a test isn't the safe assumption.

If Ogemaw County tests above the action level

Nothing about Ogemaw 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

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

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