Is Morrison County, MN a radon risk area?

Morrison 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. Rank it against the rest of the country and Morrison County lands in the 52nd percentile for radon potential.

Morrison County by the numbers

About 34,520 people live in Morrison County, Minnesota, spread over 1,125.1 square miles. Averaged across its land area, Morrison County runs about 31 people per square mile. Rank 446 by population within its EPA zone puts Morrison County at the 57th percentile among zone peers. Morrison County falls in EPA Radon Region 5, one of 524 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

Call it a middle case: above the 1.3 pCi/L most US homes average, below the 4 pCi/L line EPA uses to recommend mitigation — that's Morrison County's Zone 2 prediction. A county-wide moderate average, like Morrison 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 Morrison County

Nothing about Morrison 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 Minnesota's state radon program

Morrison County's test kit answers today; a Airthings radon monitor keeps answering for Morrison County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. RADONZONE-10OFF at checkout knocks 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 Morrison County carries, the zone explainer covers what it does and doesn't tell you about any one house.