Is Newaygo County, MI a radon risk area?

EPA's own radon map rates Newaygo County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Nationally, Newaygo County ranks higher in radon potential than 22% of rated counties (the 22nd percentile).

Where Newaygo County sits nationally

About 51,504 people live in Newaygo County, Michigan, spread over 838.887 square miles. Population density there runs about 61 people per square mile. Rank 334 by population within its EPA zone puts Newaygo County at the 68th percentile among zone peers. EPA's geology-based Region 5 groups Newaygo County with 523 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

A Zone 3 county like Newaygo County is predicted closer to the 0.4 pCi/L typical outdoors than to EPA's 4 pCi/L action level. Don't read Zone 3 as a pass for Newaygo County — EPA's guidance to test every home makes no exception for counties predicted low.

Testing and mitigation in Newaygo County

Nothing about Newaygo 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

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

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