Top-rated radon detection and reduction specialists.

Get matched with top radon detection and reduction specialists in Alton, MO

Q: How do I test for radon gas?

• <div><p>Use a radon test kit or hire professionals to conduct a detailed assessment of radon levels in your home.</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: How long can you go without a radon fan?

• <div><p>Your radon fan needs to operate 24/7 to be effective. The only time the fan isn't operating is during its replacement. Radon levels in the home can increase within hours if the fan stops working or something obstructs the stack vent. Fortunately, radon systems require no downtime maintenance between fan changes.</p></div>

Q: What types of radon mitigation systems are available?

• <div><p>Options include sub-slab depressurization, crawlspace ventilation, and sealing cracks. Choose based on home construction and radon levels.</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 Alton, MO

*The Angi rating for Radon Detection And Reduction companies in Alton, MO 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 Alton, MO 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 October 07, 2025

Reviewed in October 2025
Rick helped with replacing some rotted subfloor, removing an old furnace, insulating under the house, insulating water lines, and putting up skirting around the home. Put us in a good spot before winter hits. Great with communication and was able to help us quickly after requesting assistance.
Rick's Handyman & Remodel Service
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Reviewed in July 2022
Horrible. I said services "were performed" but technically not. He turned up ripped out my antique roses, ripped out a slew of wires, made a big mess. Then said this was not worth his time and left everything just out, hanging there. So no payment was made. He was rude, unprofessional and...
Tompkins Pump Service LLC
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Reviewed in March 2021
He is a really good worker, and has a lot of integrity.
Greer Renovation - Home Facebook
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Reviewed in April 2020
I hired Jeremy and his crew for a few projects that needed done to sell our home. Their work looks great and they completed everything very quickly! Jeremy kept in touch with me with any changes in time or materials. His whole crew was fantastic!
JM Home and Property Services
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Reviewed in May 2019
Answered all my questions. They were Very kind and respectful. They were so professional the job was Done quickly.
Birkhead Professional Tree Care
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Reviewed in October 2018
Fine, working great. They young man was extremely nice and did a good job.
Tritan Plumbing
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Reviewed in July 2014
They said they would give me price back on the bid and then I never heard from them again. They seemed professional and everything. I just don't know if they were too busy for me or why I didn't hear back from them, I have no idea. They seem competent. They showed up when they were supposed to...
Elite Aire LLC
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Reviewed in May 2014
Everything was just as they described, quality materials and installation. <br /> Job was done on time and on budget.
SOUTHEAST HOME IMPROVEMENT
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Reviewed in October 2012
It was a wonderful experience. Mark is masterful in the way he handles difficult transactions. My probate was complicated and some personalities challenging. Mark's experience of 28 years allowed him the finesse to conclude our business in a timely manner. He went above and beyond the call...
Mark Lambert - Realty One Group
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Find Radon detection and reduction specialists in Alton

Ozark Radon Gone Corp.

5.0(

)

Serving Alton, MO and surrounding areas

In business since 2021

Free estimates

"Brain is a professional at installing a radon mitigation fan! He was meticulous! Very thankful we hired him to help us. Radon is dropping!"

Response time7 hrs

Response rate86%

Recommended by70%of homeowners

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SWAT Environmental, Inc.

4.5(

)

Serving Alton, MO and surrounding areas

In business since 1988

Free estimates

Credit card accepted

"I would definitely recommend this company to anyone!!! I hired them and the job was done nicely, Dan O'Brien was the technician who took care of the project and he did an excellent job, he answered all of my questions and explained to me everything related to Radon gas. When he finished setting everything up and the job was completed all the working area looked super clean and the installation looks just like it is part of the house and that has been there forever. This is what I call a Perfect and Complete execution of a Radon gas mitigation project."

Recommended by97%of homeowners

Serving Alton, MO and surrounding areas

In business since 2023

Free estimates

Credit card accepted

"I was extremely happy with the Quality Air Test that Mr Clark provided. It was reasonably priced and done effectively and efficiently… Results were received in a timely manner as he explained. He answered any questions I had and was professional and polite… I highly recommend HASS Consulting…"

Response time7 hrs

Recommended by75%of homeowners

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Radon Detection and Reduction questions, answered by experts

Use a radon test kit or hire professionals to conduct a detailed assessment of radon levels in your home.

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.

Your radon fan needs to operate 24/7 to be effective. The only time the fan isn't operating is during its replacement. Radon levels in the home can increase within hours if the fan stops working or something obstructs the stack vent. Fortunately, radon systems require no downtime maintenance between fan changes.

Options include sub-slab depressurization, crawlspace ventilation, and sealing cracks. Choose based on home construction and radon levels.

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

The Alton, MO 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
•
Aug 3, 2026Aug 3, 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.
Amy Freeman
•
Jul 9, 2026Jul 9, 2026
Who Installs Radon Mitigation Systems?
Radon is a gas that you can't see or smell and is harmful to your health. If your home has radon, you need to know who installs radon mitigation systems.
Jacqueline DeMarco
•
Jul 9, 2026Jul 9, 2026
What Is Radon and How Does It Get In Your Home?
What is radon gas? Find out what this radioactive gas is, why it is dangerous, how it gets in your home, and how to mitigate it.
Jacqueline DeMarco
•
Jul 9, 2026Jul 9, 2026
What Is Radon Testing?
What is radon testing? Radon testing measures the presence and concentration of radon gas within indoor environments. Read on to learn more.