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*The Angi rating for Radon Detection And Reduction companies in Saint Thomas, PA 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 Saint Thomas, PA 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 13, 2026

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

Avatar for C&S Home Inspections
C&S Home Inspections
4.8(
61
)
Radon Gas - AbatementRadon Gas - Testing

Serving Saint Thomas, PA and surrounding areas

Approved

In business since 2017

Free estimates

Customers say: Quick response

"I would definitely recommend C&S home inspections! I had a Radon Mitigation system installed and had nothing but a positive experience. They are extremely knowledgeable and friendly. They explained everything I needed to know thoroughly, which is important to me. Their prices are also the best have seen in my area. If you need a Radon Mitigation System, I highly recommend."
House Inspection
Detached garage
Response time2 days
Response rate96%
5 neighbors recently requested a quote
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Avatar for Radon Protection Services of Gettysburg, Inc.
Radon Protection Services of Gettysburg, Inc.
4.5(
17
)
Radon Gas - AbatementRadon Gas - Testing

Serving Saint Thomas, PA and surrounding areas

In business since 1988

Free estimates

Small jobs welcome

"Very qualified, worked with us for location, and Bob is friendly and explained in detail the entire project. I highly recommend this group."
Response time1 day
Recommended by100%of homeowners
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Avatar for Radon Protection Services of Gettysburg
Radon Protection Services of Gettysburg
4.6(
22
)
Radon Gas - Abatement

Serving Saint Thomas, PA and surrounding areas

In business since 1988

Free estimates

Small jobs welcome

"In and out in one day. Radon levels are where they need to be. Work looks great. Very professional job."
Response time11 hrs
Recommended by100%of homeowners
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Avatar for Flood Crew LLC
Flood Crew LLC
4.6(
40
)
Radon Gas - AbatementRadon Gas - Testing

Serving Saint Thomas, PA and surrounding areas

In business since 2008

Free estimates

Emergency services offered

"I had a pipe burst in the basement of our rental property, Flood Crew was referred by our realtor. They arrived quickly after the pipe was fixed by our plumber, demoed, and dried out the areas, even handled packing out our furniture and placing carefully in a pod storage while the work was being done. They did mold testing and made sure everything was safe, the best part was that they dealt with the insurance and we didn’t have to do anything."
After carpets were cleaned.
Before and after of Medallion
After color sealed
Apartment carpet cleaning
Drying bathroom wood subfloor from kitchen using indirect control heat, controlled by thermostat we set in place

+57

Recommended by88%of homeowners
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Radon Detection and Reduction FAQs, answered by experts

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

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

The cost to replace a radon fan ranges from $300 to $600 for the fan itself, with installation adding an additional $200 to $500. Overall, the total cost for replacement can range from $500 to $1,100, depending on factors such as the fan model, home size, and local labor rates. If the fan is part of a larger radon mitigation system, the price may be higher.

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.

Your radon fan needs to operate 24/7 to be effective. The only time the fan isn't operating is during its replacement. Radon levels in the home can increase within hours if the fan stops working or something obstructs the stack vent. Fortunately, radon systems require no downtime maintenance between fan changes.

The Saint Thomas, PA 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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