Radon Mitigation in Willmar, MN
About two in five Minnesota homes test above the EPA radon action level. Radon is the second leading cause of lung cancer in the United States, and the leading cause among people who have never smoked. If your Willmar home tests high, we fix it, usually in a single day.
Radon is a Willmar problem, not just a Minnesota problem
Kandiyohi County sits on glacial till and old lake sediment, the same soils that make Minnesota one of the highest radon states in the country. Uranium in that soil breaks down into radon gas, and the gas moves up through sump baskets, floor drains, slab cracks, and crawl spaces into the house. Our long heating season makes it worse: a closed-up, heated home pulls soil gas inward for seven months of the year.
Willmar's housing stock adds to the risk. The median home here was built in 1978, decades before Minnesota's 2009 building code began requiring radon-resistant construction in new homes. Most houses in Willmar, Spicer, New London, and the surrounding townships were built with no radon protection at all. The only way to know your number is to test, and if it comes back at 4.0 pCi/L or higher, the EPA says fix it.
More on local geology and state data: radon levels in Willmar and Kandiyohi County.
What we do
Radon Testing
Short-term screening, long-term monitoring, and the clock-driven testing that real estate deals need. Minnesota's disclosure law means radon results follow the house, so test smart the first time.
Radon Mitigation Systems
Sub-slab depressurization: a sealed suction point under your basement floor, a quiet inline fan, and a vent pipe above the roofline. Done right, most homes land well under 2.0 pCi/L. Every Minnesota system installed since 2019 must carry an MDH system tag.
How it works
- Tell us about your house. Foundation type, sump or no sump, finished or unfinished basement. Five minutes by phone or the quote form.
- Get a straight quote. A firm price, not a range that grows later. Most Willmar area homes fall inside the MDH benchmark of $1,500 to $3,000. See the cost guide.
- One-day install. Suction point, sealed sump lid if needed, fan, vent stack, system gauge.
- Proof it worked. A follow-up test confirms your new level before anyone calls the job finished.
Serving Willmar and all of Kandiyohi County
Based in the Willmar area and serving Spicer, New London, Kandiyohi, Atwater, Pennock, Raymond, Blomkest, Lake Lillian, Sunburg, and the surrounding townships. Close enough to show up on time, small enough that you talk to the person doing the work.
Radon questions Willmar homeowners ask
How do I know if my Willmar home has high radon?
Testing is the only way. Radon has no smell, color, or taste, and levels vary house to house, even next door. The Minnesota Department of Health reports that about two in five Minnesota homes test above the EPA action level of 4.0 pCi/L.
What radon level is considered dangerous?
The EPA sets its action level at 4.0 pCi/L and recommends fixing any home at or above it. There is no fully safe level, and the EPA suggests considering mitigation between 2.0 and 4.0 as well. Minnesota's average is about 4.0, roughly three times the national average.
How much does radon mitigation cost in Willmar?
Most standard sub-slab systems in Minnesota run $1,500 to $3,000 installed, per MDH. Foundation type, home age, fan location, and electrical work move the price. See our cost guide for a full breakdown.
How long does installation take?
Most single-family homes are done in one day. A post-mitigation test then confirms the new level.
My home was built after 2009. Am I covered?
Minnesota code has required passive radon-resistant construction in new homes since 2009, but passive piping alone does not always keep levels low. Test first. If the number is high, adding a fan to the existing passive stack is usually the cheapest fix there is.
Who is allowed to do radon work in Minnesota?
Since January 1, 2019, Minnesota law requires anyone paid to test or mitigate radon to hold a license from the Minnesota Department of Health, and every new system must carry an MDH system tag. You can verify any license on the state eLicense site.
Get your free quote
Tell us about the house and we will get back to you fast with a real number.