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*The Angi rating for Radon Detection And Reduction companies in Barnwell, 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 Barnwell, 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 September 11, 2026

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

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

Serving Barnwell, 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 Barnwell, 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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Avatar for Coastal Empire Roofing & Construction Co
Coastal Empire Roofing & Construction Co
3.1(
16
)
Radon Gas - AbatementRadon Gas - Testing

Serving Barnwell, SC and surrounding areas

In business since 1998

Free estimates

Emergency services offered

"They did a wonderful job on my sunroom. A previous contractor did a VERY poor job - the sunroom was a disaster. But Coastal Empire made it BEAUTIFUL!! I was very happy with the results. The workers were very nice, and always cleaned up after their work."
Pantarah Sunroom Series
Recommended by80%of homeowners
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Radon Detection and Reduction FAQs, answered by experts

Long-term exposure increases lung cancer risks. Prolonged homestay individuals and smokers encounter heightened vulnerability and exposure concerns.

The natural breakdown of uranium in soil, rock, and water can cause radon to appear in a home. The gas seeps into homes through cracks in foundations, walls, or floors, as well as through gaps around pipes or construction joints. Radon levels are influenced by soil composition, building materials, and ventilation. Poorly sealed or airtight homes can trap radon, allowing it to accumulate.

Many radon fans carry a five-year manufacturer's warranty. That said, your radon fan should last between five and ten years. Regular inspections will ensure the fan is operating properly. Unusual or exceptional noise coming from the fan or indications on your manometer or system monitor can immediately tell you that something is amiss.

If high radon levels are detected, steps include sealing entry points, installing a mitigation system, and retesting the air regularly to ensure reduced levels.

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

The Barnwell, 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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