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*The Angi rating for Radon Detection And Reduction companies in Swansea, IL 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 Swansea, IL 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 August 10, 2026

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

Avatar for Scope Environmental
Scope Environmental
5.0(
15
)
Radon Gas - Testing

Serving Swansea, IL 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."
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
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Avatar for Loving Mold Removal
Loving Mold Removal
4.6(
26
)
Radon Gas - Testing

Serving Swansea, IL and surrounding areas

In business since 2019

Free estimates

Emergency services offered

"We were in the depths of nesting when we realized we were running out of time to paint the nursery before our first baby arrived. We live in an older house, so we were quite concerned about lead safety as well as minimizing paint fume exposure for my wife and newborn. We realized we needed to work with a professional who could take all of this into account and act quickly to make sure the room was ready in time. Kenneth was very accommodating to us. I'm confident we were challenging to work with given the circumstances, but he never made us feel that way. He took our concerns seriously and talked us through a variety of options to find something that worked for us. He was kind, responsive, and moved quickly to keep us on schedule. When we had notes or changes, he was quick to address them. There were a few aspects of the finish that weren't as polished as we hoped, but overall he was great to work with. The project was completed on time, and we were grateful to have his help during such a stressful moment."
Mold Testing and Remediation Project
Additional Photos
Additional Photos
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+43

Recommended by87%of homeowners
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Radon Detection and Reduction FAQs, answered by experts

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.

While DIY testing is possible, abatement generally requires professional installation to ensure efficacy and meet safety standards.

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.

The average radon mitigation system uses about 876 kWh of electricity per year, although the exact amount of electricity used will vary depending on the size of the radon fan. Once the system is installed, the annual increase to your energy bill could range from $30 to $300 per year, again depending on the size of the fan.

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.

The Swansea, IL 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.

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