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Best radon detection and reduction specialists near Dardenne Prairie, MO

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Top-Rated Radon detection and reduction specialists in Dardenne Prairie - Updated Nov 2026

Avatar for SWAT Environmental, Inc.
SWAT Environmental, Inc.
4.5(
52
)
Radon Gas - Abatement

Serving Dardenne Prairie, 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
Avatar for D and S Home Inspections
D and S Home Inspections
5.0(
9
)
Radon Gas - Testing

Serving Dardenne Prairie, MO and surrounding areas

In business since 2017

Free estimates

Credit card accepted

"Scott was on time. He is a very personal person. Shows you different items he finds during his inspection. His Technology is above par, great part is he doesn't charge extra for this."
No so handy handy man repair
ASHI
InterNACHI BUY BACK
Response time2 hrs
Recommended by100%of homeowners
Avatar for Scope Environmental
Scope Environmental
5.0(
15
)
Radon Gas - Testing

Serving Dardenne Prairie, MO and surrounding areas

In business since 2023

Free estimates

Small jobs welcome

"I used Scope Environmental recently to test floor tile and the underlying mastic to determine if either contained asbestos. I selected Scope because Jeff was very responsive, professional, independent of the abatement companies and his price was competitive. Jeff suggested testing both the tiles and mastic. The tiles tested positive for asbestos but the mastic contained no asbestos. As a result, I saved considerable expense by abating the tiles only and not the mastic so I also used Scope again for the post abatement air testing rather than the abatement company. I would hire Scope again for material and air testing for asbestos, mold or any other potentially toxic materials."
Black mold inside closet
Mold growth in HVAC Closet
Asbestos Flooring
Floor sample collection
Asbestos Adhesive

+10

Response time4 hrs
Response rate96%
Recommended by73%of homeowners
Avatar for Proper Environmental
Proper Environmental
5.0(
6
)
Radon Gas - AbatementRadon Gas - Testing

Serving Dardenne Prairie, MO and surrounding areas

Free estimates

Credit card accepted

"It went great! They set up a system in my parent's house and they mitigated the radon down to a save level. They did a test before and after, and I was satisfied with the results. Proper Environmental did a thorough job and would recommend this company to anyone!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+3

Recommended by100%of homeowners
Avatar for EnviroTech Radon Solutions
EnviroTech Radon Solutions
4.5(
8
)
Radon Gas - AbatementRadon Gas - Testing

Serving Dardenne Prairie, MO and surrounding areas

In business since 2018

"Envirotech is a professional, knowledgeable & competent company. . The owner is very accessible & explained all of the radon options for midigation throughly. High quality work was completed in a timely fashion. I would highly recommend this company for your radon testing & midigation needs."
Exterior Fan Location
Exterior Fan Location
Roof Exhaust Radon System
Interior Garage Routing
Fan located in attic and exhausted through roof

+40

Response time1 day
Recommended by83%of homeowners
Avatar for Greensmith Home Inspection, LLC
Greensmith Home Inspection, LLC
4.6(
36
)
Radon Gas - Testing

Serving Dardenne Prairie, MO and surrounding areas

In business since 2017

Free estimates

Credit card accepted

"We wanted the house inspected because we were buying it. He did a thorough enough job of examining the outside and inside of the house. One thing that he didn't do... He didn't pull some building materials away from the basement storage area to examine the basement wall for cracks. I was a little surprised about that. He also didn't notice that the basement door was getting stuck when we tried to close it. We noticed it ourselves and asked the current homeowner's to fix it. However, he did notice the slow drain in the master bath. A leaky window in the master bedroom and that their was no GFCI outlet in one of the bathrooms. He tested for water/dampness in all the rooms and all of the windows. He communicated well and arrived on time. He took about an hour outside and inside. Also looked for termite problems in the house as well. Overall, I would hire him again."
Appliance Serial Number Capture
Response time2 hrs
Recommended by93%of homeowners
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Radon Detection and Reduction FAQs, answered by experts

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.

Radon is present almost everywhere but, like sunlight, the concentration levels and how often you are exposed to it have a large part to play in just how dangerous it is. There are levels of radon that are acceptable inside a house, but above a certain limit, radon becomes a serious radioactive hazard that is a known cause of lung cancer. In fact, radon exposure is the number two leading cause of lung cancer (after smoking).

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 your home has a sump pit, you can integrate it with a radon mitigation system. You can accomplish this by sealing the pump cover with an airtight lid that accommodates radon vent pipes and sump pump hoses. This allows the vent pipe to redirect the radon gas outside of your home.

Radon is a cancer-causing radioactive gas that poses serious health risks, infiltrating homes through foundation cracks and unnoticed spaces.

The Dardenne Prairie, 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.