Is Waushara County, WI a radon risk area?

EPA's own radon map rates Waushara County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Rank it against the rest of the country and Waushara County lands in the 48th percentile for radon potential.

How Waushara County compares

About 25,079 people live in Waushara County, Wisconsin, spread over 626.161 square miles. That works out to roughly 40 people per square mile. Rank 551 by population within its EPA zone puts Waushara County at the 47th percentile among zone peers. Geologically, Waushara County is grouped into EPA Region 5 alongside 523 other counties that share its rock and soil setting.

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 Waushara County's Zone 2 prediction. Middle-of-the-pack doesn't mean risk-free for any one Waushara County address — a moderate county average still leaves individual homes to test either side of it.

If Waushara County tests above the action level

Nothing about Waushara County's EPA zone changes the mitigation number: $800–$2,500 nationally (around $1,200 typical), set by the house's foundation rather than the county it sits in — and only relevant once a test actually clears 4 pCi/L.

Find Wisconsin's state radon program

Waushara County's test kit answers today; a Airthings radon monitor keeps answering for Waushara 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

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