Buffalo County, WI radon potential

Buffalo County is mapped as Zone 1 - Highest Potential by EPA — meaning the county-wide average indoor level is predicted above 4 pCi/L. Nationally that's the 78th percentile for radon potential — Buffalo County outranks 78% of every county EPA has rated.

How Buffalo County compares

Buffalo County, Wisconsin is home to about 13,464 people across 675.791 square miles. Population density there runs about 20 people per square mile. Within its own EPA zone, Buffalo County is bigger by population than 35% of the counties that share it. Geologically, Buffalo County is grouped into EPA Region 5 alongside 523 other counties that share its rock and soil setting.

What this actually means for a house in Buffalo County

Buffalo 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. Being in Zone 1 raises the odds Buffalo County homes test above the action level, but it does not mean any specific house does — EPA recommends every home be tested, in every zone, because the only way to know is to test.

Next steps for a home in Buffalo 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 Wisconsin's state radon program

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

Where Buffalo County's figures come from

Buffalo County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. Whatever zone Buffalo County carries, the zone explainer covers what it does and doesn't tell you about any one house.