What EPA's radon map says about Pipestone County

EPA's own radon map rates Pipestone County zone 1 - highest potential, predicting a county-wide average indoor level above 4 pCi/L. Pipestone County sits at the 75th percentile nationally for radon potential — above 75 of every 100 rated counties.

How Pipestone County compares

About 9,100 people live in Pipestone County, Minnesota, spread over 465.053 square miles. Population density there runs about 20 people per square mile. Among counties sharing Pipestone County's EPA zone, it outranks 26% of them by population. Geologically, Pipestone County is grouped into EPA Region 5 alongside 523 other counties that share its rock and soil setting.

Why the zone isn't the answer by itself

Pipestone County carries a Zone 1 label because its predicted average clears 4 pCi/L outright — three-plus times the 0.4 pCi/L typical outdoors and above the 1.3 pCi/L most homes see. EPA's guidance doesn't change because of a Zone 1 label: test the house. What changes is the reason to not put it off in Pipestone County specifically.

Next steps for a home in Pipestone County

Mitigation cost doesn't depend on Pipestone 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

Pipestone County's test kit answers today; a Airthings radon monitor keeps answering for Pipestone County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. Code RADONZONE-10OFF takes 10% off at checkout.

More on how this number was built

Pipestone County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.