Top-rated radon detection and reduction specialists.

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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 is the biggest source of radon?

• <div><p>The soil beneath your house is most likely what&rsquo;s causing an increased level of radon. This is because soil holds radioactivity for a long time and it&rsquo;s also what most buildings are built on. Another common source of radon is water from a source that hasn&rsquo;t been through periodic radon tests, such as well water. Over time, the radon from the soil can inhabit other parts of your house like the foundation or plumbing.</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>

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

• <div><p>No level of radon is technically safe, but since it is present everywhere, complete avoidance is impossible. 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 preventative measures if your home's radon levels are between 2 and 4 pCi/L or higher.</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 Mound City, MO

*The Angi rating for Radon Detection And Reduction companies in Mound City, 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 Mound City, 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 June 05, 2025

Reviewed in June 2025
We found Farm and Home at the KC Home show. We needed siding and windows. John came out and gave us a quote for both. We had interviewed 3 other companies and found they didn't know as much or were mush higher priced. John had extensive knowledge and answered all our questions. They installed...
Farm and Home Builders Inc
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Reviewed in November 2024
25k for a walk in tub...spent 6 k on exact same tub at hardware store, did framing and hung concrete board ourselves, found awesome tile company from KC.
West Shore Home Kansas City
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Reviewed in November 2024
Wanted tiny porch turned into sunroomwas first told it would probably run about 60k...but then he measured, left and called us stating 100k for the small space that is really to thin to use for anything but a chair or plants, I felt the price was ridiculous...thet have since called again to...
Granite Transformations
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Reviewed in November 2023
We had them replace our bathtub and shower walls. They do excellent work, were on time and worked all day long until job was finished. Cleaned up all the floors and went over everything before leaving to make sure we were satisfied. We had Kyle and Taylor do our work, very professional men.
West Shore Home Atlanta
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Reviewed in November 2023
It was such a pleasure to work with Jamesport Stove and Chimney. Raymond was incredibly helpful in reviewing photos of the space in our home where we wanted to put a wood stove to make sure we did things properly. He was also willing to travel quite a ways to our home for the installation, which...
Jamesport Stove and Chimney
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Reviewed in May 2022
He cares what the end result looks like. He is very friendly, honest and hard working. He always wants to do a good job.
WBN Lawn Care, LLC
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Reviewed in April 2022
fast and professional but a little pricey
LeafFilter Gutter Protection
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Reviewed in April 2022
They were on time and clean. Came out even in bad weather. Good honest people.
North Star Guttering
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Reviewed in November 2020
He can do just about anything and he will do it very well!
Just Enough to be Dangerous Construction and Repair
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Find Radon detection and reduction specialists in Mound City

National Radon Defense Midwest

4.7(

)

Radon Gas - AbatementRadon Gas - Testing

Serving Mound City, MO and surrounding areas

Approved

In business since 2020

Free estimates

Warranties offered

"RADON SYSTEM WAS NOT WORKING. (Installed by another company years ago). The phone contact was pleasant and efficient. The Technician came on the agreed day and the agreed time: he explained what was wrong, explained the options, then repaired the system so it is working better than it did when first installed."

Crawlspace Encapsulation with Radon Mitigation

+15

Response time1 day

44 neighbors recently requested a quote

Recommended by96%of homeowners

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SWAT Environmental, Inc.

4.5(

)

Radon Gas - Abatement

Serving Mound City, 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

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The Environmental Guys LLC

New to Angi

Radon Gas - Testing

Serving Mound City, MO and surrounding areas

In business since 2025

Free estimates

Emergency services offered

We test for several different hazardous materials and gas. We also off mold & mildew surface removal and cleaning with environmental friendly cleaners. We do offer free quotes and consulting on remedies for issues to your home or business.

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Radon Detection and Reduction questions, answered by experts

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.

The soil beneath your house is most likely what’s causing an increased level of radon. This is because soil holds radioactivity for a long time and it’s also what most buildings are built on. Another common source of radon is water from a source that hasn’t been through periodic radon tests, such as well water. Over time, the radon from the soil can inhabit other parts of your house like the foundation or plumbing.

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 present everywhere, complete avoidance is impossible. 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 preventative measures if your home's radon levels are between 2 and 4 pCi/L or higher.

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

The Mound City, 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.
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•
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.