Stearns County, MN radon potential

EPA's own radon map rates Stearns County zone 1 - highest potential, predicting a county-wide average indoor level above 4 pCi/L. Rank it against the rest of the country and Stearns County lands in the 96th percentile for radon potential.

Stearns County by the numbers

Stearns County, Minnesota is home to about 163,997 people across 1,342.883 square miles. That works out to roughly 122 people per square mile. Within its own EPA zone, Stearns County is bigger by population than 89% of the counties that share it. Stearns 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

Fixing a home becomes an EPA recommendation past 4 pCi/L, and that is precisely the side of the line Stearns County's Zone 1 prediction lands on, well above the roughly 1.3 pCi/L most US homes average. A Zone 1 rating means testing is worth doing sooner rather than later, but it is still county-wide average, not a reading for any single house — some homes in Stearns County will test well under the action level, and EPA's guidance is to test regardless of zone.

Testing and mitigation in Stearns County

A short-term test kit is the standard first step and typically costs far less than mitigation itself. If a test comes back at or above 4 pCi/L, a radon mitigation system for a typical home runs roughly $800–$2,500 (around $1,200 for a common single-family install), driven mainly by foundation type, not by county.

Find Minnesota's state radon program

For Stearns County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Stearns County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. Use code RADONZONE-10OFF at checkout for 10% off.

Where Stearns County's figures come from

Stearns County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.