Milwaukee homeowners face real radon risk. Wisconsin’s glacial soils are among the most radon-prone in the Midwest, and Milwaukee’s mix of older foundations, basements, and slab construction creates multiple pathways for radon gas to enter your home. Wisconsin Radon & Environmental has been solving radon problems across Milwaukee for over 15 years — with the owner, Jerome O’Callaghan, on-site for every single job.
Radon Mitigation Services in Milwaukee
Radon Mitigation System Installation — We design and install active soil depressurization (ASD) systems custom-fit to your home’s foundation type. Most Milwaukee installations are completed in a single day.
Radon Testing & Measurement — Short-term and long-term radon testing for homeowners, buyers, sellers, and real estate transactions. NRPP-certified measurement for accurate, reliable results.
Vapor Intrusion Mitigation — Beyond radon, we handle other soil-based vapor intrusion concerns including chemical vapor and VOC mitigation for residential and commercial properties.
Our Sub-1.5 pCi/L Guarantee
Most radon contractors aim for the EPA action level of 4.0 pCi/L. We don’t stop there. Our premium mitigation tier is engineered to reduce your home’s radon levels below 1.5 pCi/L — that’s the World Health Organization’s recommended threshold and the gold standard for indoor air quality. If you want the best result, not just a passing grade, that’s what we deliver
Why Milwaukee Homeowners Choose Wisconsin Radon & Environmental
• Owner on every job — Jerome O’Callaghan personally handles every installation. You’re not getting a subcontractor or a crew you’ve never met.
• NRPP & AARST certified — Full certifications for mitigation, measurement, multifamily measurement, and mitigation across residential and commercial properties.
• A+ BBB rating — Over 314 five-star Google reviews and an A+ Better Business Bureau rating earned over 15+ years of service.
• Real estate ready — Fast turnaround for buyers and sellers navigating radon contingencies. We understand the pressure of a closing deadline
Serving Milwaukee and Surrounding Areas
We serve all Milwaukee neighborhoods and zip codes, including the East Side, Bay View, Riverwest, Brookfield border areas, and the south side. We also serve surrounding suburbs — if you’re in the greater Milwaukee metro, we come to you.
Ready to Protect Your Home?
Call or text us to schedule your radon test or mitigation estimate — we respond fast.
Wisconsin Radon & Environmental, LLC
1155 N 21st St
Milwaukee, WI
53233
