Vilas County, WI: EPA's radon zone, explained

EPA's own radon map rates Vilas County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Vilas County sits at the 48th percentile nationally for radon potential — above 48 of every 100 rated counties.

How Vilas County compares

Vilas County, Wisconsin is home to about 23,948 people across 857.712 square miles. Population density there runs about 28 people per square mile. By population, Vilas County is the 566th largest of every county sharing its EPA zone — the 45th percentile by population within that zone. Vilas County falls in EPA Radon Region 5, one of 524 counties nationally EPA assigns to that same geologic province.

What this actually means for a house in Vilas County

Neither at the 4 pCi/L action level nor down at the roughly 1.3 pCi/L national indoor norm, Vilas County's Zone 2 prediction lands in the gap between the two. Nothing about a Zone 2 label lowers the case for testing in Vilas County — EPA recommends it in every zone, moderate included.

Next steps for a home in Vilas County

For a Vilas County homeowner, the order is simple: test first, since a kit costs a small fraction of what mitigation would. Only if the result clears 4 pCi/L does a system — typically $800–$2,500, about $1,200 for a common install — become worth pricing out.

Find Wisconsin's state radon program

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

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.