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*The Angi rating for Radon Detection And Reduction companies in Granite City, 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 Granite City, 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 Granite City - Updated Nov 2026

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

Serving Granite City, IL 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
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Avatar for TCD Radon Specialists LLC
TCD Radon Specialists LLC
5.0(
5
)
Radon Gas - Abatement

Serving Granite City, IL and surrounding areas

In business since 2025

Free estimates

Small jobs welcome

"I highly recommend this contractor for radon gas abatement! They were extremely professional, knowledgeable, and thorough from start to finish. They took the time to explain the process, answered all of my questions, and made sure everything was done correctly. They were reliable, respectful of my home, and clearly take pride in their work."
Radon mitigation system
Radon mitigation system
7 neighbors recently requested a quote
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Radon Detection and Reduction FAQs, answered by experts

Mitigation can take several days depending on home setup, equipment accessibility, and achieving effective diffusion system sealed efficiency.

The cost for a radon mitigation system typically ranges from $800 to $1,500, with an average around $1,000. The final price depends on several factors, including the size of your home, the severity of the radon issue, and the type of system required. Your home's foundation type also significantly impacts the cost. For example, sealing and ventilating an unfinished basement might cost around $4,600, while encapsulating a crawl space without a foundation slab can range from $1,500 to $15,000.

The fan that pulls the radon out of the air needs to run continuously, so you may see an increase in your electric bill once you install the mitigation system. Additionally, you may see an increase in your heating or cooling bills, as the fan can cause some loss of hot or cool air.

Installation typically takes 1-2 days, depending on the system and property layout.

Testing every 2-5 years or upon adjusting occupancy or structural changes maintains safe environments.

The Granite City, 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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