Radon Mitigation in Eau Claire, WI
Eau Claire anchors the Chippewa Valley in west-central Wisconsin, where you will find an older river-city housing stock alongside university-area and newer additions. Radon does not track a home's age or style. It rises from the soil under whatever foundation is there, so a downtown river-city bungalow and a newer build on the edge of town can each test high or low. The only way to know a given home's level is to test it. Whether a reading just came back high or you are planning ahead after a cold-weather test, Badger State Radon connects Eau Claire homeowners with independent local radon professionals. We are a free matching service, not a contractor, and this page lays out what radon looks like here and what to do next.
Radon in Eau Claire and the Chippewa Valley
Eau Claire County is EPA Radon Zone 2 (predicted average indoor level of 2 to 4 pCi/L), cited to the EPA Map of Radon Zones. Every Wisconsin county falls in Zone 1 or Zone 2; the state has no Zone 3. Zone is a countywide screening designation based on predicted averages, not a reading for your specific street, so a Zone 2 label is not a clean bill of health for any one house. Statewide, WI DHS reports that about one in 10 Wisconsin homes tests above the 4.0 pCi/L action level, and the figure swings house to house. You can check results near your address on the WI DHS radon results map.
Testing your Eau Claire home
The regional Radon Information Center serves the Chippewa Valley, and statewide 17 Radon Information Centers offer kits for about $15 including lab analysis. A short-term charcoal test runs a few days and suits a home sale, while a long-term test gives a better year-round average. Winter is peak testing season in the Chippewa Valley, since closed-up homes trap radon at its highest indoor levels. If a short-term test reads at or above 4.0 pCi/L, the EPA recommends confirming with a follow-up test. See radon testing for the full protocol.
Radon in Eau Claire well water
Many homes around Eau Claire and across west-central Wisconsin draw from private wells, and this part of the state sits near granite-influenced geology where radon can dissolve into groundwater. Radon in water releases into the air when you shower, run the tap, or do laundry, so a home on a private well should weigh a radon-in-water test alongside an air test. Public water systems are already monitored for it, so the concern is mainly private wells. Our page on radon in water covers how that testing and any treatment work.
Mitigation and cost
If a test comes back high, the common fix is active sub-slab depressurization: a sealed suction pipe and a continuously running fan that vent radon from beneath the slab to above the roofline. Sealing cracks alone is not a fix. Wisconsin DHS estimates a contractor-installed system typically costs $1,000 to $2,000, and Eau Claire homes fall in that range depending on foundation type and layout. Learn how systems work on the radon mitigation page. The independent professionals we match you with can hold the voluntary NRPP or NRSB credentials; Badger State Radon does not perform the work or hold any certification. For the statewide picture, the Wisconsin radon guide ties testing, mitigation, and home sales together.