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Find Radon gas testers in Janesville

Avatar for PureTech Home Services LLC
PureTech Home Services LLC
5.0(
8
)

Serving Janesville, WI and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

"I had PureTech install a radon gas abatement system which lowered my levels from the high teens all the way down below 2 on average. Zach, the technician, was super helpful and great to work with. They even leave this really nice package behind. Results speak for themselves. I recommend PureTech."
Radon Abatement Fan
Before / After Test
After Mitigation
Pre & Post Test
System Install

+6

Response time3 hrs
Response rate96%
3 neighbors recently requested a quote
Avatar for Lifetime Home Services
Lifetime Home Services
4.9(
123
)

Serving Janesville, WI and surrounding areas

Approved

Super Service Award Winner

In business since 1993

Free estimates

Warranties offered

"Alex and team were very professional and responsive to any questions we had during the process. Both visits were efficient and our radon test after the mitigation system went from a 9 to a 1.3. Awesome work!"
Radon Mitigation
Radon Mitigation
Radon Mitigation
Milwaukee Garage Install
Response time11 hrs
Response rate93%
224 neighbors recently requested a quote
Avatar for David Cook's Radon Services
David Cook's Radon Services
5.0(
17
)

Serving Janesville, WI and surrounding areas

In business since 2013

Free estimates

Warranties offered

"Tom and Josh arrived on the day and time promised. They were both very polite, professional and worked extremely well together. They explained exactly what they were doing and why they were doing it! They installed the radon Mitigation system and went above and beyond expectations. They cleaned up after themselves. After the job was complete, it looks like it has always been here. What more can you ask? I will definitely recommend DC Mitigation for anyone who needs this service!"
Recommended by100%of homeowners
Avatar for Superior Radon Mitigation LLC
Superior Radon Mitigation LLC
4.9(
19
)

Serving Janesville, WI and surrounding areas

In business since 2000

Free estimates

Emergency services offered

"We need a quick turnaround after our house tested high for radon during a home inspection. The owner Don was super responsive with the initial quote and was right on top of every from start to finish. Got our installation scheduled right away and blew away the tight timeline we were facing with closing approaching. I hope I only need one remediation system in my lifetime but if I ever had to use his services again, this would be the first spot I would call."
Recommended by100%of homeowners
Avatar for Due Diligence LLC
Due Diligence LLC
5.0(
71
)

Serving Janesville, WI and surrounding areas

In business since 2015

Free estimates

Warranties offered

"Jeffrey responded almost immediately to my Angie's List inquiry. He rearranged his schedule to fit us in on very short notice and was available, flexible and communicative surrounding the holiday weekend with our and the sellers' changing schedules. He is very friendly, attentive, experienced, thorough and adept. He listens very well and explains in layman's terms - or whatever terms suit his client. The cost noted includes two furnaces and two air conditioners with the Radon test."
Recommended by100%of homeowners
Avatar for Environmental Testing & Research Laboratories, Inc
Environmental Testing & Research Laboratories, Inc
4.8(
347
)

Serving Janesville, WI and surrounding areas

In business since 1995

Free estimates

Warranties offered

"<p>it was superb! they easiest, hassle free Radon test in town, with extremely proficient people -- very knowledgeable and very people-friendly! they took their time to explain things on the phone to me before I committed. the test came back within 10 days or so -- via email. which is very convenient. it was very clear as it is, but I like talking through it and get advice. they were instantly available to discuss. they gave me future tips to keep on top of all things Radon related. </p> <p>I have to say that all this comes to be after 3 months of many back and forths with 3 other companies -- none of the other companies could be bothered to schedule a time, and those who did, never showed up.. many times over. I don't know why I was so patient with them and I wish had discovered Environmental Testing & Research Laboratories much sooner.</p> <p>Really highly recommend them!</p> <br />"
Recommended by93%of homeowners
AT Pro Mitigation Systems
4.9(
17
)

Serving Janesville, WI and surrounding areas

In business since 2004

Free estimates

Emergency services offered

"I received 3 bids and selected John based on his having the lowest estimate and the highest Angieslist reviews. John is based in Janesville, WI, so scheduling him to install in my Madison, WI home was a bit tricky. He came to my home for an on-site inspection/bid, and we had to wait 3 weeks to get him to install. <br /> In terms of quality, John went above and beyond in his attention to detail. I appreciate that he installed using larger 4" PVC pipes (the other contractors said they would do 3" so less airflow), and he told me he was using a more expensive (albeit more power consuming) Radonaway RP265 fan from Home Depot. The fan has very good reviews. John caulked all of the hairline cracks in the basement floor, sealed the sump pump crock, and caulked the entire perimeter of the basement subslate/wall so that even trace amounts of radon wouldn't seep through. <br /> John was very considerate of my preference of keeping straight lines and minimal bends in the PVC pipe to ensure maximum airflow. The basement to garage to attic space above garage ended up being a very clean solution that is not obtrusive. I liked that John went above and beyond in listening to my needs and addressing a solution that fit both form and function. <br /> I did my research prior to his installation and John confirmed that he installed a condensate bypass kit to prolong the lifespan of the fan, and he also adhered to my request to have a wire guard and cap installed at the exhaust pipe just to prevent birds or other critters from falling in or "dropping their stuff" down the exhaust. I had no concerns of John's installation quality or detail. <br /> Where John could have improved was in his post-install follow-up. John normally offers a one-time post install radon reading (he says he uses the consumer-based Safety Siren Pro radon meter that you can buy from Amazon.com) but it ended up being rescheduled, then canceled, and enough time passed by that it never happened. I did request John still follow-up on it, but he must have lost track because I didn't hear back for months. I ended up purchasing my own Corentium radon meter. <br /> In the end, the results are what matters. From my home inspection radon readings, I was averaging 11.1 pCi/l with a peak of 22.3 pCi/l. After A.T. Pro Mitigation's install, I was averaging 0.9 pCi/l with a peak of 2.3 (7-day reading). I am very pleased with the end result. <br /> <br /> <br />"
Recommended by100%of homeowners
AL BEYERS INDOOR COMFORT SYSTEMS
4.9(
10
)

Serving Janesville, WI and surrounding areas

In business since 1936

Free estimates

Emergency services offered

"Based on the inspection it needed a new part and there was an electrical issue we needed to have fixed. The technician was very helpful, was determined to get the stove to work. Three visits were needed (initial, return to install part, return after electrical outlet fixed to be sure everything worked properly). Very professional, knowledgeable and responsive. Explained how to operate and maintain the stove."
Recommended by100%of homeowners
FIRST LOOK HOME INSPECTION
New to Angi

Serving Janesville, WI and surrounding areas

In business since 2005

Free estimates

Warranties offered

Why Us? \n•Every home inspection is handled with the utmost respect and dedication to detail \n•We offer the satisfaction and peace of mind which comes with a job well done \n•Over 25 years of industry experience and more than 4 years of home inspecting experience. \n•Online scheduling with a $25 discount \n•We offer the use of Infrared Technology to provide the most thorough home inspection possible (cost is additional for this service). \n•Computer generated reports

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FAQs for radon gas testing projects in Janesville, WI

Radon is the second leading cause of lung cancer in the U.S. The gas seeps through cracks in foundations and collects in basements and other low areas. Once you breathe it in, radioactive particles lodge in lung tissue and do long-term damage. Because you can’t see or smell radon, the EPA recommends testing your home every two years—and after major renovations—to keep your family safe.

Yes—every home should be tested. The EPA advises doing it at least every two years and any time you remodel, buy, or sell. On average, one in 15 houses nationwide sits above the recommended limit, and the only way to know where yours stands is a formal test. The equipment simply measures gas levels and won’t change your indoor environment, so the process is completely harmless.

Certified radon professionals—often home inspectors or dedicated radon mitigation contractors—handle testing. These radon testing professionals follow EPA protocols and use calibrated instruments to check levels throughout your house. Hiring a certified radon specialist means results you can trust for real estate deals, insurance requirements, and, most importantly, your family’s health.

Inspectors specialize in measuring radon gas levels, while licensed mitigation contractors design and install the systems that remove it. If your test comes back high, your inspector can point you to a qualified mitigation pro who will size and install the right fan, piping, or other equipment to bring levels down.

No—standard home air purifiers don’t touch radon. They’re built to trap dust and pollen, not radioactive gas. If testing shows high levels, you’ll need a dedicated mitigation system that vents the gas from beneath your home to the outdoors. Relying on a room purifier alone won’t keep your indoor air safe.

Opening a few windows in your home might dilute radon for a short time, but the gas seeps back in as soon as they’re closed. For a lasting fix, you’ll need a professional mitigation system—often a sub-slab depressurization fan—that pulls radon from beneath the foundation and safely vents it outside.

The Janesville, WI homeowners’ guide to radon gas testings

From average costs to expert advice, get all the answers you need to get your job done.