Is Lincoln County, MN a radon risk area?

EPA places Lincoln County in Zone 1 - Highest Potential — a predicted county-wide average indoor radon level above 4 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Rank it against the rest of the country and Lincoln County lands in the 71st percentile for radon potential.

How Lincoln County compares

About 5,564 people live in Lincoln County, Minnesota, spread over 536.786 square miles. Averaged across its land area, Lincoln County runs about 10 people per square mile. Rank 903 by population within its EPA zone puts Lincoln County at the 15th percentile among zone peers. Lincoln County falls in EPA Radon Region 5, one of 524 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

Lincoln County's predicted average sits above EPA's own action level of 4 pCi/L — the concentration at which EPA recommends fixing a home — versus a national average around 1.3 pCi/L indoors and 0.4 pCi/L outdoors. That doesn't mean every Lincoln County house tests high — a zone is a county-wide prediction, never a single-home reading — but it's a reason to test sooner rather than let it wait.

If Lincoln County tests above the action level

Nothing about Lincoln 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

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

The methodology guide shows exactly which EPA and Census sources feed Lincoln County's numbers. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.