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Q: What steps should be taken if high radon levels are detected?

• <div><p>If high radon levels are detected, steps include sealing entry points, installing a mitigation system, and retesting the air regularly to ensure reduced levels.</p></div>

Q: What level of radon is considered safe or dangerous?

• <div><p>No level of radon is technically safe, but since it is naturally present everywhere, it is impossible to avoid entirely. The average radon level in homes across the United States is 1.3 picocuries per liter (pCi/L). The Environmental Protection Agency (EPA) recommends taking action to reduce radon levels if your home's test results are between 2 and 4 pCi/L or higher.</p></div>

Q: How does radon enter my home?

• <div><p>Radon enters your home when warm air begins to rise and exits through the roof, creating a vacuum that pulls cooler air from under the foundation. Part of that air is radon, which is an invisible, odorless gas that develops naturally when radioactive particles are deep within the ground. Those particles usually come from decaying matter in soil and rocks.</p></div>

Q: Can I install my own radon mitigation system?

• <div><p>A <a href="https://www.angi.com/articles/can-homeowners-install-radon-mitigation-systems.htm">homeowner can install a radon mitigation system</a> on their own. But it&rsquo;s a challenging DIY that requires a lot of knowledge about radon mitigation as well as familiarity with local regulations. You do not want to risk an improper installation that leaves the system unable to detect radon or gives it a shortened life span. Relying on a professional is the surest way to guarantee a successful installation.</p></div>

Q: What are the benefits of radon mitigation?

• <div><p>Mitigation reduces radon levels, protecting your health and complying with safety standards.</p></div>

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Verified Reviews for Radon Detection And Reduction pros in Greenleaf, WI

*The Angi rating for Radon Detection And Reduction companies in Greenleaf, WI is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Radon Detection And Reduction needs.

*The HomeAdvisor rating for Radon Detection And Reduction companies in Greenleaf, WI is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Radon Detection And Reduction needs.

Last update on May 06, 2026

Reviewed in May 2026
Amazing job trimming the pine tree branches. Everything was done carefully and professionally, and the trees look soo much better now. Couldn't be happier with how it turned out.
Brandon and Scott's Services, LLC
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Reviewed in February 2026
Mad City sent out a professional to remove our shower and install a new system and it was accomplished in one day. All debris was meticulously cleaned up and disposed of to our complete satisfaction. We were given welcomed instructions as to the upkeep and cleaning process to maintain the...
Mad City Windows & Baths
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Reviewed in December 2025
With last minute help needed, KARAMAN TREE SERVICE AND SNOW REMOVAL was willing to help me! I am grateful for his flexibility and great customer service.
Karaman Tree Service & Snow Removal, LLC
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Reviewed in October 2025
Service was excellent. Ray contacted me the day I put in my request, he was able to give me an estimate that same day. We have three large white cedar trees that are planted too close together and adjacent to power lines. They had never been trimmed (except the tops by WPS) and are over 40...
Ray's Green Lawns
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Reviewed in July 2025
Cleaned out the creek shoreline from overgrown weeds. Very efficient and cleared away the debris. Excellent and thorough -
Haulin Install, LLC
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Reviewed in June 2025
They did an amazing job and exceeded my expectations! I’m so happy with everything and it looks so nice! Thomas went above and beyond to take care of everything! Very reasonably priced and just a great, professional job. I highly recommend Packerland Stump Removal!
Packerland Stump Removal
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Reviewed in May 2024
Eric was very professional, personable and determined to fix our raccoon problem and he did.
EV Large Pest Control, LLC
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Reviewed in April 2024
Great company Brandon was very knowledgeable and was able to determine our problem area and have it repaired by the afternoon. The next day have not had issues since and cannot even tell there was damage great job.
Elite Remodelers
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Reviewed in January 2024
Your categories were limiting - this was for a Radon Mitigation System. Here are my comments: "Mike did an excellent job, very knowledgeable and efficient - he removed the old Radon Mitigation Fan and installed the replacement in less than 45 minutes. Mike was very professional and...
Fox Valley Radon LLC
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Reviewed in November 2021
Called North Shield Roofing to install a B-vent chimney and flashing for the heater recently installed in my garage. Made the job look quick and painless and saved me the headache of pulling up old shingles! Highly recommend for all roofing needs.
North Shield Roofing LLC.
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Find Radon detection and reduction specialists in Greenleaf

Lifetime Home Services

4.9(

109

)

Serving Greenleaf, WI and surrounding areas

Approved

In business since 1998

Free estimates

Emergency services offered

"It went great. I highly recommend them. They were a pleasure to deal with. The person that came out for the estimate answered all of my questions. The estimate was fair. The work was done on schedule and with no problem. At completion, everything was explained to me. I used their electrician which worked out fine. After completion the radon test showed that my level was now undetectable."

Response time2 days

7 neighbors recently requested a quote

Recommended by98%of homeowners

Serving Greenleaf, WI and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Warranties offered

Small jobs welcome

"MIke was a breeze to work with and very knowledgeable when it came to testing our home for radon. Super impressed by his professionalism!"

Response time2 days

1 neighbors recently requested a quote

Recommended by85%of homeowners

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Clare Home Inspection, LLC

4.9(

)

Serving Greenleaf, WI and surrounding areas

In business since 2000

Free estimates

Credit card accepted

"Steve was very thorough and answered all of our questions. He tested things no other inspector we have had did, for example all the outlets. His report was sent to us quickly. He helped us decide which issues from the home inspection needed to be addressed right away and which could wait. He was clean and articulate. Very nice guy. Highly recommended."

Response time3 hrs

Response rate100%

Recommended by100%of homeowners

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A-Max Home Inspections, LLC

4.8(

)

Serving Greenleaf, WI and surrounding areas

In business since 2014

"I met Ryan Amundson 2 yrs ago when my mom hired him to do a home inspection. Since then, my daughter, my son, and myself have all hired him to do home inspections on our new home purchases. He is AWESOME! Very professional! He is very thorough but still personal. Even when I interrupt him with my many questions, he is always willing to take time to explain things, show me items, and give me advise. His reports are easy to understand and always accompanied by great photos of any issues. I would highly recommend A-MAX and Ryan Amundson. You wonÃ¢Â Â t be sorry!"

Recommended by100%of homeowners

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Little Less Home Inspections, LLC

5.0(

)

Serving Greenleaf, WI and surrounding areas

In business since 2022

Free estimates

Credit card accepted

"Responded quickly, provided a good inspection and gave us honest opinions. We would work with him again."

Response time1 day

Recommended by100%of homeowners

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JW Rothrock Inc

New to Angi

Serving Greenleaf, WI and surrounding areas

In business since 1994

For lead testing and other specialty services JW Rothrock Inc. is Wisconsin's premier in lead testing as well as abatement. For cost effective and professional service JW Rothrock is by far above and beyond the rest.

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Radon Detection and Reduction questions, answered by experts

If high radon levels are detected, steps include sealing entry points, installing a mitigation system, and retesting the air regularly to ensure reduced levels.

No level of radon is technically safe, but since it is naturally present everywhere, it is impossible to avoid entirely. The average radon level in homes across the United States is 1.3 picocuries per liter (pCi/L). The Environmental Protection Agency (EPA) recommends taking action to reduce radon levels if your home's test results are between 2 and 4 pCi/L or higher.

Radon enters your home when warm air begins to rise and exits through the roof, creating a vacuum that pulls cooler air from under the foundation. Part of that air is radon, which is an invisible, odorless gas that develops naturally when radioactive particles are deep within the ground. Those particles usually come from decaying matter in soil and rocks.

A homeowner can install a radon mitigation system on their own. But it’s a challenging DIY that requires a lot of knowledge about radon mitigation as well as familiarity with local regulations. You do not want to risk an improper installation that leaves the system unable to detect radon or gives it a shortened life span. Relying on a professional is the surest way to guarantee a successful installation.

Mitigation reduces radon levels, protecting your health and complying with safety standards.

The Greenleaf, WI homeowners’ guide to radon detection and reduction services

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

See all articles

Mitchell Grant
•
Mar 18, 2026Mar 18, 2026
How Much Does a Radon Mitigation System Cost? [2026 Data]
The cost of a radon mitigation system depends mostly on the type of system being installed. Use this guide to learn about your options.
Alison Kasch
•
Apr 6, 2026Apr 6, 2026
How Much Does Radon Remediation Cost? [2026 Data]
Get clear answers on how much radon remediation costs, including average prices, key cost factors, and tips to save money on your home’s radon mitigation.
Angi
•
Mar 18, 2026Mar 18, 2026
How Much Does Radon Testing Cost? [2026 Data]
Find out what impacts radon testing costs, including average prices for DIY kits and professional services, so you can protect your home and budget confidently.
Merlisa Lawrence Corbett
•
May 22, 2026May 22, 2026
6 Potential Health and Safety Hazards to Avoid When Buying a House
If you’re looking to buy a house, a home inspection can uncover hidden hazards that could pose a health risk to your household. Here’s what to know.
Amy Freeman
•
Apr 5, 2026Apr 5, 2026
How to Install a Radon Mitigation System
Did your radon test come back high? Here's what you need to know about how to install a radon mitigation system to protect your home and family.
Kate Fann
•
Apr 9, 2026Apr 9, 2026
Radon Mitigation System Diagram: Understanding How It Works
You need to protect your home from radon, but what does a radon mitigation system look like? Check out this radon mitigation system diagram to learn how it works.