Clearwater County, MN radon potential

Clearwater 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. That puts Clearwater County in the 39th percentile nationally for radon potential — higher than 39% of the counties EPA has rated.

Clearwater County by the numbers

Clearwater County, Minnesota is home to about 8,630 people across 999.003 square miles. That works out to roughly 9 people per square mile. Within its own EPA zone, Clearwater County is bigger by population than 18% of the counties that share it. Clearwater 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

Clearwater County's predicted average falls between EPA's 4 pCi/L action level and the national indoor average of about 1.3 pCi/L (outdoor air runs roughly 0.4 pCi/L). Middle-of-the-pack doesn't mean risk-free for any one Clearwater County address — a moderate county average still leaves individual homes to test either side of it.

If Clearwater County tests above the action level

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 Clearwater County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Clearwater 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 Clearwater County's figures come from

Clearwater 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.