What EPA's radon map says about Manistee County

EPA places Manistee County in Zone 3 - Low Potential — a predicted county-wide average indoor radon level below 2 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Manistee County sits at the 16th percentile nationally for radon potential — above 16 of every 100 rated counties.

Manistee County by the numbers

About 25,519 people live in Manistee County, Michigan, spread over 542.325 square miles. That works out to roughly 47 people per square mile. Among counties sharing Manistee County's EPA zone, it outranks 48% of them by population. EPA's geology-based Region 5 groups Manistee County with 523 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

At Zone 3, Manistee County's predicted county average is under the national indoor average (~1.3 pCi/L) and well below EPA's 4 pCi/L action level — outdoor air nationally runs about 0.4 pCi/L for comparison. A Zone 3 label describes Manistee County's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

Next steps for a home in Manistee County

Mitigation cost doesn't depend on Manistee County's zone — it depends on the house's foundation. A typical system runs $800–$2,500 (about $1,200 typical), and testing first is what tells you whether that's needed at all.

Find Michigan's state radon program

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

More on how this number was built

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. Whatever zone Manistee County carries, the zone explainer covers what it does and doesn't tell you about any one house.