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The Milwaukee Radon Mitigation Specialists

Wisconsin Radon is one of the most trusted and longest serving Radon Mitigation contractors in Milwaukee, proudly serving the Greater Milwaukee and South Eastern Wisconsin area for over 10 yrs.

We provide expert radon mitigation and vapor intrusion services at affordable pricing. We offering both residential and commercial services in the greater Milwaukee, Waukesha, Ozaukee, Washington, Dodge, Jefferson, Racine, Kenosha, Sheboygan and Fond Du Lac areas. Our services have been awarded an A+ with the BBB.

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Fully Certified.
Residential/Commercial.
Guaranteed Results.

Financing Available!

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Radon Testing

We provide short term (48hr) testing with state of the art continuous radon monitors. Our quick on-site reports give you the information you need when you need it.

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2021 Super Service Award

What Is Radon?

Radon is the number one cause of lung cancer among non-smokers. It is an inert, colorless, odorless gas, one in a chain of natural by-products of uranium decay.

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Our ProcessTestingSealingDiagnosticSuctionVenting
milwaukee radon mitigation

Step-By-Step Radon Mitigation Guide

Our custom radon mitigation services are effective and will ensure a safe home for you and your family. Scroll through the tabs to learn about how our service works.

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Testing

A short-term radon test is conducted by Wisconsin Radon & Environmental, Homeowner, or a Home Inspector. Tests are typically conducted with Electronic, Continuous Radon Monitors. These devices are left in the basement for 2 days (Minimum) and log the radon levels over that period. If test results are above 4 pCi/L, Radon Mitigation is recommended.

Wisconsin Radon & Environmental also offers Advanced Radon Hot-Spot Locating. Deploying Multiple testing units in different areas of the home to better determine radon mitigation approach, potentially eliminating unnecessary cost . This can be advantageous if there are multiple radon-entrance locations: Crawl-Space, Sump-Basin, and Slab-On Grade.

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Sealing

Radon entrance points are sealed. Primary Radon Entrance points are: The Sump Basin, Major Cracks, and Crawl-Spaces. If existing sump pump is a “Pedestal Style” Sump-Pump, it will need to be replaced with a new “Submersible Style” Sump Pump. This is to ensure a safe seal on the sump basin.

The Sump Basin can be sealed with a simple silicone sealant or can be “Mechanically Sealed” with gasket and bolts/screws for a more secure and professional look.

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Diagnostic

Radon Mitigation is all about sub-slab air movement or “Pressure Field Extension”. The more of the sub-slab we can depressurize, the more effective the radon mitigation system will be. Advanced Diagnostics are done to appropriately size radon fan and determine suction-pipe location(s) for proper Radon Mitigation System Design. Diagnostics can be done with a Pitot-Tube and a Vacuum for advanced design or with the desired radon fan itself. This is particularly important when there is no drain-tile on older homes and we are moving air through the soil. The tighter the soil, the bigger the radon fan.

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Suction

After the slab is sealed and the appropriate fan and piping is chosen, the Radon Fan is wired up and turned on. This begins the Radon Collection/Suction process.

The Radon Fan is the only part of the Radon Mitigation System with moving parts and the most important part of the system.

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milwaukee radon mitigation

Venting

Radon Exhaust needs to be vented to the exterior of the home. The exhaust point needs to be 2’ above or 10’ away from any window or entrance to the home. Venting can be done on the exterior or through an attached garage. PVC is recommended but “Matching” Gutter-Downspout is acceptable.

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Hear What Our Customers Have To Say About Us

Wisconsin Radon & Environmental, LLCExcellentWisconsin Radon & Environmental, LLC5.0★★★★★ Based on 208 reviews fromSee all reviews review us onNan FlahertyNan Flaherty ★★★★★ Fast, friendly, efficient service. Can't ask for more.Response from the ownerThanks Nan! Ryan SarveyRyan Sarvey ★★★★★ I didn’t end up getting any work done but wanted to leave a 5 star review for the customer service I received from Jerome. He is clearly very knowledgeable and answered all of my questions thoroughly despite not having a formal contract. If I need radon work done in the future I will be sure to get back in touch with Wisconsin Radon.Response from the ownerThanks Ryan! What a compliment, really appreciate it. Jason KlagstadJason Klagstad ★★★★★ Linda and I had been putting off the Radon mitigation in our basement for quite awhile and had actually been considering a full house heat transfer/air system. We were recommended Wisconsin Radon by one of the folks at the HVAC company we've dealt with for a long time and it turns out to have been the smartest, most efficient way of dealing with both Radon and basement air we could've found.We found Jerome, head of the company very easy to talk to and work with. He was prompt, friendly and very transparent about the best way of dealing with our situation. He completed his work on our house in a few hours and will check back in to make sure all is well in a few days.We could not recommend anyone in this area of home service higher. Very happy with WI Radon's work.Response from the ownerThanks Jason! It was great to work with you and your wife on this one. Glad we could bring that air quality up. Anna MolinaroAnna Molinaro ★★★★★ Jerome was a great communicator and answered all my questions. Very accommodating to schedule change requests and had fair and honest pricing!Response from the ownerThanks Anna. Glad we could get this taken care of for you. Anthony ReidAnthony Reid ★★★★★ Very prompt and thorough service with information easily understood by non-experts. Jerome gave us options and addressed our situation with a pragmatic solution. He went out of his way to run piping in a way that did not impact our use of the space, or the visual appeal of the property. 5 starsResponse from the ownerThanks Anthony! Glad we could come up with a solid solution for you and the family. Mike MikulaMike Mikula ★★★★★ Really impressed with the knowledge and installation of Wisconsin Radon. They took our levels from as high as 5.0 down to around 0.5!Response from the ownerThanks Mike! Lynn KoehlerLynn Koehler ★★★★★ Jerome was incredibly helpful in replacing our high suction fan. He gave us options and his communication was fantastic. Thank you!Response from the ownerThanks Lynn! Cindy AndersonCindy Anderson ★★★★★ I would recommend Wisconsin Radon and environmental without any hesitation. Jerome is a true professional. Communication was excellent. Quote was clear and fair. He worked with us to find a spot for the system that was minimally visible. The work area was spotless when he was done. And most importantly, the radon level in our basement was below 1 within 24 hours!Response from the ownerThanks Cindy! Scott AndersonScott Anderson ★★★★★ Jerome came out and explained my options. He communicated like a pro from start to finish. Itemized quote was quick and straightforward. After signing off on the quote, the work was done in a day. Radon levels went from 3 to .5 using my tester. We’re happy we went with Milwaukee Radon, and would recommend them to anyone looking for mitigation.Response from the ownerThanks Scott! Awesome to work with you and your wife on this one. Jeff TheysJeff Theys ★★★★★ The experience was outstanding. The installer was kind, professional, and easy to work with. The end result looked and functioned perfectly. I could not have asked for the install to go any better.Response from the ownerThanks for the kind words Jeff! Jeffrey WnukJeffrey Wnuk ★★★★★ Jerome is a true professional. Efficient, clean, and very easy to work with. Shows up on time and communicates well. Good workmanship. Overall a great experience.Response from the ownerThanks, Jeff! Much appreciated. tony impellitteritony impellitteri ★★★★★ Wisconsin Radon installed a radon mitigation system on January 17, 2025, in our side-by-side condo basement. The work was performed in 4 hours, and was masterfully done by Jerome, with the assistance of an electrician from Nelco Electric. Jerome did performance field extension testing to ensure that a right-sized radon fan would be used to ensure de-pressurization of the entire slab (if that had not been done, and a smaller radon fan was used instead of a larger radon fan, the result would have been a seriously compromised mitigation system). Jerome also sealed off the sump pump in the basement to ensure that the radon fan's suction power would not be diluted. He also installed (at my request) a moisture bypass so that moisture would not condense on the fan and drip into it (this lessens the lifespan of the radon fan). At the end of his work, he walked my wife and I through his indoor work and his outdoor work, and he promised a re-test in 2-3 weeks to ensure that the levels of radon gas have been reduced to a safe level. I can't say enough about Wisconsin Radon and Jerome (Jerome is state-certified to do radon mitigation, and not everyone is!).Response from the ownerThanks for the thorough review, Tony! Steve AdamsSteve Adams ★★★★★ The Wisconsin Radon Team was great to work with in addressing the radon issue in our home !!. They kept us informed about the entire process and provided an effective price to complete the work required .Response from the ownerGlad we could save you a few dollars on this one Steve! Thanks for taking the time. Laura McCall HamrickLaura McCall Hamrick ★★★★★ Highly recommend!! We had an existing inefficient radon system that Jerome was able to assess for free and offer multiple different pricing scenarios to help bring our radon levels down lower. He was super fast and efficient working and our radon levels have been below 1 if not below 0.5 ever since our system was fixed! (Before they were anywhere between 1.5-3)Response from the ownerThanks Laura!Glad we could fix that funny setup for you. (And save you a few bucks!) Pete YoungPete Young ★★★★★ Great experience from start to finish. Would highly recommend WI Radon & Environmental for anyone in need of a radon mitigation system. The process was super easy and Jerome did a fantastic job on the install. Radon levels went from averaging over 20 pci/l over the past 6 months to under 0.5 pci/l within 48 hours of install.Response from the ownerThanks, Pete! Appreciate you taking the time to leave a note. Timothy PlennesTimothy Plennes ★★★★★ Great company to work with. Scheduling was easy and the installation was professionally done.Response from the ownerThanks Timothy! Kristjahn SaligaKristjahn Saliga ★★★★★ Called and got a hold of someone within a week. The quote and invoice paperwork was all on the website and was pretty easy to use and understand. We scheduled a day for them to come out and they had the system installed and running in a single day. There was a small complication where they needed an electrician to hook up the system and they provided one who came same day. The work was done well and our radon sensor shows a reduction in particulates immediately after installation.Response from the ownerThanks Kristjahn! Great to get that radon system and back up sump pump installed for you. Thanks again! Drew BoisvertDrew Boisvert ★★★★★ Knowledable courteous and expedient. They installed radon mitigation system in my home and did a great job at a fair price.Response from the ownerThanks Drew! Awesome to work with you on this one. Noah & Sasha PearceNoah & Sasha Pearce ★★★★★ Very pleased with the level of service provided! Great communication during the quoting process through installation. Our radon levels swiftly dropped from 7+ to an average of approximately 0.3 pCi/L as measured by continuous monitoring. Looking forward to working with them again when we replace our sump pump down the road.Response from the ownerThanks guys! It was great to work with both of you. Glad we could get you to fresh-air levels. Devon KlompmakerDevon Klompmaker ★★★★★ Jerome and the team do amazing work!Response from the ownerThanks Devon! Great to work with you. JJ MudgettJJ Mudgett ★★★★★ Jerome is great at his job, great with the customers and installing the system. I feel wonderful my family is now safe from radon.Response from the ownerThanks JJ! Great to work with you and the family. Andrey SAndrey S ★★★★★ Response from the ownerThanks again, Andrey. It was great to work with you on this one. Jim LabiszakJim Labiszak ★★★★★ Great experience. Jerome is a true professional who excels at his craft. Would go to him again and happy to endorse his work.Response from the ownerThanks Jim! Really appreciate you taking the time, means a lot to us. Patrick KernPatrick Kern ★★★★★ Very professional and easy to work withResponse from the ownerThanks Patrick! Michael SargentMichael Sargent ★★★★★ Their solution to an unusual problem due to multiple additions to the home was engineering at its finest. The were timely and cost effective.Response from the ownerThanks Michael! We pride ourselves on coming up with cost-effective solutions for complex problems. Jacob BJacob B ★★★★★ Prompt, efficient service and reasonable pricing. Installed in one afternoon. Zero attempt to upsell me on something I didn’t want. Wish all my contractors were as straight-forward as Jerome.Response from the ownerThanks, Jacob! Stan AltshullStan Altshull ★★★★★ I recently had a radon mitigation system and sump pump installed by Wisconsin Radon & Environmental. I am totally satisfied with the service they provided. Jerome was both professional and personable. He provided necessary information and answered all of my questions in a thorough manner. The installation was topnotch. I highly recommend this company.Response from the ownerThanks Stan! Great to work with you too. Khou PerryKhou Perry ★★★★★ Super friendly, super nice. The work was done in a very professional and respectful manner. I would recommend this place to anyone that needs help or has questions regarding a radon system!Response from the ownerThanks Khou! Sue HowellSue Howell ★★★★★ Jerome is excellent at customer service! He responded quickly over the phone, provided a detailed estimate and did an exceptional job at installing our radon mitigation system. It looks fantastic, but more importantly our radon levels reduced dramatically and are well within safe range now. My office is in our basement so I'm able to go back to working there. Thanks Jerome!Response from the ownerThanks Sue! Glad to get you safely back to work in the basement. Regina HackneyRegina Hackney ★★★★★ Great service, fast, fantastic and friendlyResponse from the ownerThanks Regina! Mike SargentMike Sargent ★★★★★ I had several firms come out and do a test and prepare proposals for radon remediation.. Wisconsin Radon & Environmental issued a comprehensive proposal which addressed the complex issues related to a house that had multiple additions, slabs and basement components. The proposal was clear, easy to understand and the staff willing answered any questions I had. Their proposal addressed the whole project up front. This differs from the other proposals which were "let's try this and then take additional action if the radon issue was not resolved by the proposed solution". In addition they considers street appeal of the installation and their price was fair and reasonable.I rate them 5 star on responsiveness, approach, engineering and price. I highly recommend Wisconsin Radon and Environmental.Response from the ownerThanks for the thoughtful wright up Mike. We do strive to fully address and communicate the best possible solution while also being very mindful of cost. Thanks! George AlexiouGeorge Alexiou ★★★★★ Jerome was very professional and detailed with his work. Very quick turnaround and got the results I was looking for. Definitely recommend.Response from the ownerThanks George! ViicViic ★★★★★ Worked with Jerome, and the process was as smooth as it could have possibly gone! In and out with very low disruption, a check-in to see if everything was working properlly, and the inclusion of an electrician made it an incredibly positive experience. Will be recomending this company to others in my area who inquire about how we mitigated our radon issue!Response from the ownerThanks! It was awesome to work with you too. Lisa MorganLisa Morgan ★★★★★ Jerome & crew were great to work with. Very nice, thorough & efficient.Response from the ownerThanks Lisa. Appreciate the kind words. sherrisherri ★★★★★ Recommend for fair assessment, reliability and job completionResponse from the ownerThanks Sherri! JEFF MINERJEFF MINER ★★★★★ We first had Jerome put a mitigation system in our home a few years ago and last week we hired him to put one in at our mom’s home after high levels of radon was detected there. He is very easy to contact, his work is impeccable and his prices are fair. We would highly recommend his services.Response from the ownerAwesome to work with you again Jeff! Mile MilojevicMile Milojevic ★★★★★ Jerome is awesome. Efficient and knowledgeable. I am happy I can now have peace of mind that my kid will no longer be exposed to higher levels of radon. Thanks again Jerome.Response from the ownerThanks Mile! Great to work with you on this one. Kathy MKathy M ★★★★★ Very knowledgeable, and I'm so glad I got it done. He had good advice on placement of the pipes. Radon levels are now next to nothing.Response from the ownerThanks Kathy! Jeff WickJeff Wick ★★★★★ Jerome was fantastic! After 3 other companies were not sure how to handle our Radan venting, Jerome came over and was confident his solution would work! We went from a 21 exposure to a 1.4 below the government suggested number of 4….Response from the ownerThanks Jeff! That was a fun one! Thomas LaurieThomas Laurie ★★★★★ Service was great overall. Jerome installed our system and was very friendly and willing to provide detailed descriptions of the services that were performed and others that will be needed to optimize the radon mitigation systemResponse from the ownerThanks Thomas, great to work with you! Rosalie BarringtonRosalie Barrington ★★★★★ I can't say enough great things about Jerome and WI Radon & Environ.! The, care, clear explainations, options and high quality of work leaves me as a very happy customer! I wasn't thrilled that my new home failed its radon testing, but I am grateful that they were there to take care of all the details and get my home fixed up. Thanks guys!!!Response from the ownerThanks Rosalie! Really appreciate the opportunity. Nathan MillerNathan Miller ★★★★★ Jerome was fast, efficient, friendly, and cleaned up when he was done. I wish I could hire him for more projects! Home ownership would be easy if everyone was like him.Response from the ownerThanks Nathan!Greatly appreciate the kind words. Adam WissmuellerAdam Wissmueller ★★★★★ Jerome was quick and efficient. The price was very competitive for a radon mitigation system, sump pump and battery back up. Would definitely recommend Wisconsin Radon & Environmental to family and friends.Response from the ownerThanks Adam! Great to help you out with the radon system and backup sump pump installation. S CS C ★★★★★ Provide excellent service and follow up throughout the whole process. Highly recommend.Response from the ownerThanks again! Rick ConnorsRick Connors ★★★★★ Jerome was fantastic to work with, was in and out within about 3 hours. Communication was top notch and prices were very fair. Would recommend to anyone.Response from the ownerThanks Ricky! Glad to finally take care of this for you and the crew. BrandonBrandon ★★★★★ Knowledgeable, professional, trustworthyResponse from the ownerThanks Brandon! Great to work with you. Loretta UdzielaLoretta Udziela ★★★★★ It was a pleasure to have met Jerome Ocallaghan who installed the Radon equipment for my house. He was friendly, professional and knowledgeable. My house feels better especially the downstairs level. I highly recommend Wisconsin Radon & Environmental and I gave it a 5 star rating. Thank you Jerome.Response from the ownerHi Loretta, it was great to work with you as well!We’ll presume that the one star rating was just a slip of the keyboard, ha ha! Would you mind changing that for us when you get a second? Samantha TruchanSamantha Truchan ★★★★★ Highly recommend them for radon mitigation!! Jerome was professional, timely, and knowledgeable. A great company to work with and we felt their pricing was really fair. We had gotten quotes from a few other companies and Wisconsin Radon had them beat for the same work. Very easy to get a quote and schedule an installation appointment. The line by line quote was super detailed and helpful. We will be hiring them again in the future to replace our sump pump once it gets to the end of its life!Response from the ownerThanks Samantha! Glad we could save you a few dollars on this one while providing an awesome customer experience. Frank GayleFrank Gayle ★★★★★ Jerome provided great service. He was very knowledgeable, courteous, and efficient. The installation went smoothly and he did a thorough cleanup after the job was completed. I highly recommend Jerome.Response from the ownerThanks Frank! js_loader