What EPA's radon map says about Alcona County

Alcona County is mapped as Zone 2 - Moderate Potential by EPA — meaning the county-wide average indoor level is predicted between 2 and 4 pCi/L. Alcona County sits at the 40th percentile nationally for radon potential — above 40 of every 100 rated counties.

Alcona County by the numbers

About 10,624 people live in Alcona County, Michigan, spread over 674.655 square miles. That works out to roughly 16 people per square mile. Among counties sharing Alcona County's EPA zone, it outranks 22% of them by population. EPA's geology-based Region 5 groups Alcona County with 523 other counties nationally sharing its underlying rock and soil profile.

Zone vs. an actual test

EPA's Zone 2 rating for Alcona County sits below its own 4 pCi/L action level but above the national indoor average of about 1.3 pCi/L. A county-wide moderate average, like Alcona County's, can still hide a specific house well above or below it — testing is what actually answers the question.

Next steps for a home in Alcona County

Mitigation cost doesn't depend on Alcona 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

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

The methodology guide shows exactly which EPA and Census sources feed Alcona County's numbers. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.