Top-rated radon detection and reduction specialists.

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

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 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: Do radon mitigation systems decrease home value?

• <div><p>No, radon mitigation systems do not decrease home value or make a home harder to sell. In areas where homes experience similar radon exposure risks, a radon mitigation system is viewed as an improvement. Potential homebuyers often opt to buy a home with a radon mitigation system already installed to reduce the risk of cancer for their families.</p></div>

Q: What if radon is still high after mitigation?

• <div><p>You'll need to test your home for radon after installing the mitigation system, then again every two years. If radon remains elevated, contact a licensed radon professional, either the contractor who installed the system or a different one, and have them evaluate the system. They may need to make some changes to improve its effectiveness and performance.</p></div>

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>

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Verified Reviews for Radon Detection And Reduction pros in Valles Mines, MO

*The Angi rating for Radon Detection And Reduction companies in Valles Mines, 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 Valles Mines, 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 January 08, 2026

Reviewed in January 2026
Landen was very professional and helped navigate us through a leak in our system. He explained throughly what he was doing and how he was going to fix it. I would definitely recommend Reeder Heating and Cooling to anyone
Reeder Heating and Cooling LLC
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Reviewed in November 2025
I had a great experience with Premier Junk Removal! They helped clear out a room for me, and the whole process was quick, easy, and stress-free. The team was professional, punctual, and respectful of my home. They worked efficiently and made sure everything was taken care of just the way I...
Premier Junk Removal & Demo LLC
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Reviewed in July 2025
I had a water softener and filtration system installed in my home. It's fabulous! Austin was very reliable and friendly. He was extremely efficient. I'm so happy with my system, and with Jones Air and Water.
Jones Air And Water
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Reviewed in March 2025
These polite and capable young men showed up within a half hour of our phone conversation. They inspected the damage on the ridge of my roof, gave me a quote, went after materials, and were back and working to fix my problems within 15 minutes. I am very pleased with the results and with the...
Budget Contracting LLC
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Reviewed in September 2024
Anthony went above and beyond to inspect my home and it's damages to provide a perfect solution. I haven't seen many people with so much attention to detail and it's hard to find someone with a solid work ethic such as his.
Foundation Recovery Systems
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Reviewed in September 2024
They did a wonderful job! They took down 2 very large trees in our front yard and ground the stump. The price was great and the service was even better. They came out to give us an estimate quickly, got the job done when they said it was going to be done and the whole experience was very...
R & B Tree Service & Landscaping, LLC
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Reviewed in May 2024
Just moved in my new home and had a few white pine trees in my yard. My friend recommended gary. They gave a free estimate and removed the trees quickly. It was a joy having the crew on my property. Very respectful men and did a great job.
Accurate Tree Service
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Reviewed in February 2024
This guy showed up and made me a good fair estimate, and they showed up when they said they would and cleared about 10 acres of land and built us a homesite and also done a few tree removals that needed done. Just all in all would recommend to anyone anytime.
KDH Dirt & Tree Work
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Reviewed in August 2023
Rick has done tree/shrub removal and has done some landscape construction as well. We are very pleased with how things turned out and will be having Rick do additional work for us very soon. Strongly recommend.
RHL Contracting LLC
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Reviewed in June 2023
White’s Tree Service did an exceptional job removing three trees and trimming about five more in our yard. Their estimate was reasonable and done in a quick manner and actual job was done the following week. Cleanup in the yard was excellent. This was the second time we have used their...
White's Tree Service
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Find Radon detection and reduction specialists in Valles Mines

Metro Radon Control of St. Louis, LLC

4.9(

171

)

Serving Valles Mines, MO and surrounding areas

In business since 2011

Free estimates

Emergency services offered

"He was very professional and courteous. He brought a radon gas monitor in my home to test radon levels and he said that everything was okay. And I didn’t have a problem with radon."

Response time6 hrs

Recommended by99%of homeowners

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SWAT Environmental, Inc.

4.5(

)

Serving Valles Mines, MO and surrounding areas

In business since 1988

Free estimates

Credit card accepted

"Overall everything was pretty good. I felt the installation could have looked much cleaner but it is fine. I still haven't re tested to see what my radon levels are now."

Recommended by97%of homeowners

Serving Valles Mines, MO and surrounding areas

In business since 2023

Free estimates

Small jobs welcome

"TESTING FOR ASBESTOS I need to make sure people know about a man named Jeff Miller Owner of Scope Environmental. I wanted to have my basement checked for Asbestos. This man was absolutely the nicest person. Jeff is a professional, who explained things extremely well and in detail, offered positives suggestions, and extremely knowledgeable. Oh, and extremely honest and helpful. If you ever want to have your basement checked for Radon or Asbestos or Mold, please call this nice man who has a vast amount of experience and knowledge on these three issues. His phone number is 314-220-1810. His pricing is very reasonable and he is Certified in the State of Missouri which is a requirement by the State to do testing. He sure put my mind at peace."

+10

Response time4 hrs

Response rate96%

Recommended by73%of homeowners

Serving Valles Mines, MO and surrounding areas

In business since 2019

Free estimates

Emergency services offered

"It went great they were very professional and very knowledgeable."

+43

Recommended by87%of homeowners

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Municipal Environmental Services

New to Angi

Serving Valles Mines, MO and surrounding areas

In business since 2025

Free estimates

Offers commercial services

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today!

7 neighbors recently requested a quote

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Radon Detection and Reduction questions, answered by experts

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.

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.

No, radon mitigation systems do not decrease home value or make a home harder to sell. In areas where homes experience similar radon exposure risks, a radon mitigation system is viewed as an improvement. Potential homebuyers often opt to buy a home with a radon mitigation system already installed to reduce the risk of cancer for their families.

You'll need to test your home for radon after installing the mitigation system, then again every two years. If radon remains elevated, contact a licensed radon professional, either the contractor who installed the system or a different one, and have them evaluate the system. They may need to make some changes to improve its effectiveness and performance.

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

The Valles Mines, 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
•
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.
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.