What EPA's radon map says about Jackson County

Jackson County is mapped as Zone 1 - Highest Potential by EPA — meaning the county-wide average indoor level is predicted above 4 pCi/L. Nationally that's the 76th percentile for radon potential — Jackson County outranks 76% of every county EPA has rated.

How Jackson County compares

About 9,861 people live in Jackson County, Minnesota, spread over 702.972 square miles. That works out to roughly 14 people per square mile. Among counties sharing Jackson County's EPA zone, it outranks 28% of them by population. Jackson 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

Where the national indoor average runs about 1.3 pCi/L, Jackson County's Zone 1 rating puts its predicted county average above EPA's 4 pCi/L action level itself. Some Jackson County homes will test comfortably under the action level despite the county's Zone 1 rating — the only way to know which kind of home you have is an actual test.

If Jackson County tests above the action level

Mitigation cost doesn't depend on Jackson 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 Minnesota's state radon program

Jackson County's test kit answers today; a Airthings radon monitor keeps answering for Jackson 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. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.