La Crosse County, WI radon potential

EPA places La Crosse County in Zone 2 - Moderate Potential — a predicted county-wide average indoor radon level between 2 and 4 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. That puts La Crosse County in the 61st percentile nationally for radon potential — higher than 61% of the counties EPA has rated.

How La Crosse County compares

La Crosse County, Wisconsin is home to about 121,060 people across 451.806 square miles. Population density there runs about 268 people per square mile. Within its own EPA zone, La Crosse County is bigger by population than 84% of the counties that share it. La Crosse County falls in EPA Radon Region 5, one of 524 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

Call it a middle case: above the 1.3 pCi/L most US homes average, below the 4 pCi/L line EPA uses to recommend mitigation — that's La Crosse County's Zone 2 prediction. A county-wide moderate average, like La Crosse County's, can still hide a specific house well above or below it — testing is what actually answers the question.

Next steps for a home in La Crosse 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 La Crosse County, an ongoing number beats a one-time test - a Airthings radon monitor tracks La Crosse 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 La Crosse County's figures come from

La Crosse 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.