RM
Radon Measurement & Elimination Services
Licensed Provider: Chase A. Nicholson
Full Service•Elm Grove, WI
5.0 (120 Google reviews)
Certified RMP, RMS
Radon Pros in Wisconsin
57 contractorsEPA zone context: Most of Wisconsin is Zone 1, especially the southern and western regions. Milwaukee and Madison metros are high-risk areas.
About Radon in Wisconsin
Last updated: March 2026
Wisconsin is classified as a high-risk state for radon, with most of the southern and western regions solidly in EPA Zone 1. The Milwaukee and Madison metropolitan areas are both in high-risk zones, meaning the majority of Wisconsin's population lives in areas with elevated predicted indoor radon potential. Wisconsin's glacial geology — the same deposits that shaped the state's distinctive landscape — is the primary driver of radon gas generation. The combination of permeable glacial soils, uranium-bearing bedrock, and cold winters that create tight building envelopes produces consistently elevated readings. Wisconsin requires radon measurement professionals to be registered with the Wisconsin Department of Health Services, providing a regulatory framework for testing qualification. In real estate transactions, radon testing is not state-mandated but is standard practice in the Milwaukee metro, Madison area, and most southern Wisconsin markets. Wisconsin's radon profile is significant because of the overlap between Zone 1 classification and population density — the state's largest metro areas are also its highest-risk areas. The Wisconsin Department of Health Services maintains an active radon program and recommends testing every home in the state, with particular emphasis on homes with basements, which are the predominant foundation type throughout Wisconsin.
Typical Mitigation Cost in Wisconsin
$1,000–$2,500
Near national average
- • Glacial deposits create variable sub-slab permeability
- • Granite bedrock in northern Wisconsin produces elevated radon
- • Cold climate requires freeze-protected piping
- • Active contractor market in Milwaukee and Madison supports fair pricing
Certified Professional
Certified Professional
Certified RMP
5.0 (15 Google reviews)
Certified RMP, RMS
5.0 (303 Google reviews)
Certified RMP
4.6 (87 Google reviews)
Certified RMP
5.0 (29 Google reviews)
Certified RMP, RMS
5.0 (109 Google reviews)
Certified RMP
5.0 (26 Google reviews)
Certified RMP, RMS
4.9 (97 Google reviews)
Certified RMP, RMS
Madison Radon Testing, LLC
Licensed Provider: Lindsay Mefford, Kirk Gannon Mefford
Testing Specialist•Madison, WI
Certified Professional
Certified RMP
RS
Radon Safe Homes and Businesses
Licensed Provider: David Daniels, Benjamin L Daniels
Full Service•Neenah, WI
Certified Professional
Certified RMP, RMSFree Estimates
Quality Inspections, LLC
Licensed Provider: Quality Inspections, LLC dba National Property Inspections
Testing Specialist•Mount Pleasant, WI
5.0 (101 Google reviews)
Certified RMP
5.0 (33 Google reviews)
Certified RMP, RMS
Certified Professional
Certified RMP, RMS
5.0 (31 Google reviews)
Certified RMP, RMS
Data provided by Google Maps
Popular Cities for Radon Mitigation in Wisconsin
Other areas with radon contractors
What to Do Next
Three steps to address radon in your Wisconsin home.
Frequently Asked Questions: Radon in Wisconsin
Testimonials
Recent homeowner results in Wisconsin
Examples of homeowners who tested, mitigated, and confirmed lower radon levels in Wisconsin.
“Radon levels were 8.2 pCi/L before the install and 0.6 on the follow-up test. The quote matched the scope and the crew finished in one day.”
Outcome
Reduced from 8.2 pCi/L to 0.6 pCi/L
Rachel M.
Brookfield, WI
“We compared two certified companies here and picked the one that explained the crawlspace plan clearly. Our monitor stayed below 1.5 the week after the system went live.”
Outcome
Post-install readings stayed below 1.5 pCi/L
Chris D.
Chippewa Falls, WI
“The site helped us find a contractor fast during escrow. They tested, installed mitigation, and documented the re-test so closing stayed on schedule.”
Outcome
Testing, mitigation, and re-test completed before closing
Patricia L.
Beloit, WI
Radon Guides for Wisconsin
Articles and guides to help you understand radon risk and make informed decisions.
What Does Radon Mitigation Cost? A Homeowner's GuideRadon Levels by State: Where Is Radon Most Common?What Radon Level Is Dangerous?How to Choose a Radon Mitigation Contractor
Cornerstone Guides
Radon testing & monitoring products for Wisconsin
Start with a low-cost test kit, or set up continuous monitoring after mitigation.
Test Your Home
Radon test kits from $10
Monitor Continuously
Digital radon detectors
DIY Supplies
Manometers, sealants & more
Affiliate disclosure: We may earn a small commission on purchases at no extra cost to you.
State Resources for Wisconsin
Radon mitigation cost in Wisconsin
Estimate likely project pricing by foundation type and system complexity.
Radon testing guide for Wisconsin homes
Learn when and how to test, plus how to interpret pCi/L results.
Radon levels and EPA zones in Wisconsin
See how state-level risk varies and what zone maps can and cannot tell you.
ZIP-level radon risk in Wisconsin
Check projected local risk by ZIP code before contacting contractors.
All radon guides
Browse testing, mitigation, maintenance, and foundation guides.
Radon mitigation near me
Find nearby mitigation contractors by ZIP code distance.
Radon products for Wisconsin homeowners
Compare top-rated test kits, monitors, and mitigation fans.
Browse radon services
Explore testing, mitigation, system design, and commercial radon services.
Are you a radon contractor in Wisconsin? Get featured placement above organic results. Learn more