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    Average homeowner rating
  • Verified reviews icon12
    Verified radon detection and reduction services reviews

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

Avatar for Radon Abatement Services
Radon Abatement Services
4.9(
257
)
Radon Gas - Abatement

Serving Great Falls, VA and surrounding areas

Approved

In business since 1998

Free estimates

Warranties offered

"Radon Abatement services is a reliable dependable superb company. I have had an excellent experience from start to finish. Scheduling was easy and expeditious, service was professionally and very well done. Most importantly, Radon is gone with its in-house level reduced to almost its outside level. John Swett was very helpful and kindly answered all my emails and quickly addressed every concern I had. This project could not have been done better."
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1 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for Radon Abatement Services, LLC
Radon Abatement Services, LLC
4.6(
135
)
Radon Gas - Abatement

Serving Great Falls, VA and surrounding areas

Approved

In business since 1997

Free estimates

Customers say: Quick response

"I'm completely satisfied with the work that John's team did. They were extremely professional and knowledgeable. The workmanship is superb. Best of all, the system works as promised and reduced the radon concentration based on subsequent tests. I could not recommend them more highly."
11 neighbors recently requested a quote
Recommended by98%of homeowners
Avatar for NextDay Inspect
NextDay Inspect
4.9(
518
)
Radon Gas - Testing

Serving Great Falls, VA and surrounding areas

Approved

Super Service Award Winner

In business since 2008

Free estimates

Emergency services offered

"It all went very well Azmi came out and checked all areas of my home for Mold, particulate, and Radon as well as other gases, we opted for complete screening but they offer all size packages"
Inspections with Matthew
Inspections with Larry
Inspections with Dimitri
Inspections with Rhonda
Cracks in the Foundation- Here we find moderate cracks in the foundation, with evidence that they've been repaired before.

+738

Response time8 hrs
Response rate100%
4 neighbors recently requested a quote
Dragon Ridge Home Inspections
5.0(
8
)
Radon Gas - AbatementRadon Gas - Testing

Serving Great Falls, VA and surrounding areas

In business since 2003

Free estimates

Credit card accepted

"JT of Dragon Ridge performed a Home Inspection and Radon Testing of a SFH in Fairfax, VA. JT arrived before I did, and was already examining the exterior of the property. While we waiting for my realtor to arrive, he grabbed a ladder and did a complete inspection of the roof (not all inspectors do this). Once we got inside, he explained the processes and we began. I shadowed him throughout the whole processes, and it was a wonderful experience. He was very thorough and knowledgeable, and was always willing to provide complete and educational answers about both the good and the bad he found. We got the report later that evening, and it was well written, with plenty of pictures of any deficiencies. He also performed a Radon test, and reported the results a few days later. I spoke to him over the phone about the findings, and he was able to discuss in detail the methodology he used, and the meanings of the testing numbers. Overall, I would highly recommend JT and Dragon Ridge."
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Recommended by100%of homeowners
Avatar for Water Damage America
Water Damage America
5.0(
100
)
Radon Gas - AbatementRadon Gas - Testing

Serving Great Falls, VA and surrounding areas

In business since 2014

Free estimates

Emergency services offered

Water Damage America provides the best and most reliable restoration services, we sustain our business on quality and integrity. We are experts in Water Damage and Water Mitigation Services. We are committed to quality from the beginning to the end of your project. We look forward to earning your business. We always work according to IICRC standards in restoration.\nWe are always available 24/7 for our valuable people to put them out of any Water Damage-related emergency.\n

Recommended by98%of homeowners
Avatar for CSI Home and Commercial Services
CSI Home and Commercial Services
4.6(
80
)
Radon Gas - AbatementRadon Gas - Testing

Serving Great Falls, VA and surrounding areas

In business since 1995

Free estimates

Credit card accepted

"During the initial contact, I was impressed with the explanation of the testing process provided by the individual who answered my call. I was equally impressed by Mr. Robinson's step-by-step explanation while he set up the equipment to perform the test. He explained his licensing and the accuracy of the test that he was conducting. He was professional, efficient and possesses a great deal of expertise in his chosen field. He informed me when to expect the results of the testing and followed up with a phone call explaining the report in minute detail. Looking forward to working with Mr. Robinson for the next step in this process. Thanks again. -- Roger K"
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+5

Recommended by97%of homeowners
Green Environmental
4.9(
9
)
Radon Gas - Testing

Serving Great Falls, VA and surrounding areas

In business since 2016

Free estimates

Credit card accepted

"I own a condominium in DC. The inspector tested my unit with his x-ray equipment. It was determined that no lead was found in my unit and I will never have to have it tested again. The inspector was prompt and very knowledgeable. It gives me great joy knowing that my future tenants will be safe in my unit."
Response time4 hrs
Recommended by100%of homeowners
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Radon Detection and Reduction FAQs, answered by experts

Options include sub-slab depressurization, crawlspace ventilation, and sealing cracks. Choose based on home construction and radon levels.

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

The soil beneath your house is most likely what’s causing an increased level of radon. This is because soil holds radioactivity for a long time and it’s also what most buildings are built on. Another common source of radon is water from a source that hasn’t been through periodic radon tests, such as well water. Over time, the radon from the soil can inhabit other parts of your house like the foundation or plumbing.

Radon is present almost everywhere but, like sunlight, the concentration levels and how often you are exposed to it have a large part to play in just how dangerous it is. There are levels of radon that are acceptable inside a house, but above a certain limit, radon becomes a serious radioactive hazard that is a known cause of lung cancer. In fact, radon exposure is the number two leading cause of lung cancer (after smoking).

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 Great Falls, VA 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.