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Verified Reviews for Radon Detection And Reduction pros in Johnsonville, SC

*The Angi rating for Radon Detection And Reduction companies in Johnsonville, SC 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 Johnsonville, SC 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 10, 2026

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

Avatar for SWAT Environmental, Inc.
SWAT Environmental, Inc.
4.8(
10
)
Radon Gas - Abatement

Serving Johnsonville, SC and surrounding areas

In business since 2002

Free estimates

Credit card accepted

"Had them come out to install a Radon Mitigation Fan. Service was fast and the installer was extremely knowledgable. He was in an out within an hour and the radon dropped from a 4 to a 0.59! Extremely happy with the result. Price wasn't cheap by any means but definitely fixed our problem."
Recommended by100%of homeowners
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Avatar for Summit Engineering, Laboratory & Testing, P.C
Summit Engineering, Laboratory & Testing, P.C
4.0(
7
)
Radon Gas - Testing

Serving Johnsonville, SC and surrounding areas

In business since 2003

Emergency services offered

Credit card accepted

"Did what they said they would, very knowledgeable and great job over all"
Response time1 day
Response rate90%
Recommended by100%of homeowners
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Environmental Service Group
New to Angi
Radon Gas - Testing

Serving Johnsonville, SC and surrounding areas

In business since 2010

Free estimates

Credit card accepted

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! We are family owned and operated, so please let us know how our family can take care of yours! \n \n

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Radon Detection and Reduction FAQs, answered by experts

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.

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.

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

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.

Yes, many systems include warranties for performance. Confirm terms with your installer.

The Johnsonville, SC 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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