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*The Angi rating for Radon Detection And Reduction companies in Washougal, WA 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 Washougal, WA 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 29, 2026

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

Really Fast Rapid Radon Remediation
4.7(
30
)
Radon Gas - Abatement

Serving Washougal, WA and surrounding areas

Approved

In business since 2010

Free estimates

Credit card accepted

"Stu and Tom took care of our radon needs to get our home ready for sale. The communication was excellent. The finished product was fantastic and I’m sure the new owners will love the system. Very fast in and out on a short window of time we had. Thank team. I’d hire again for sure"
Response time9 hrs
1 neighbors recently requested a quote
Recommended by96%of homeowners
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Avatar for Alpha Environmental Services Inc
Alpha Environmental Services Inc
4.7(
134
)
Radon Gas - AbatementRadon Gas - Testing

Serving Washougal, WA and surrounding areas

Approved

In business since 2002

Free estimates

Warranties offered

"From initial inspection to mitigation was about a week. Technician were punctual and finished within time estimated."
Heating Oil Tank
Radon Reduction System
Removal of Underground Tank
Response time1 day
Response rate100%
Recommended by85%of homeowners
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Avatar for Propertyexam
Propertyexam
4.6(
18
)
Radon Gas - AbatementRadon Gas - Testing

Serving Washougal, WA and surrounding areas

In business since 1986

Free estimates

Emergency services offered

"Everything has gone well. I have always received a quick response from him within the same day. He knows his stuff and educated me on a few things as well. He is definitely a great guy to work with."
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+4

Recommended by100%of homeowners
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Avatar for Gorge Quality Home Inspection
Gorge Quality Home Inspection
5.0(
3
)
Radon Gas - Testing

Serving Washougal, WA and surrounding areas

In business since 2019

Gorge Quality Home Inspection gorgequaulityhomeinspection.com offers unbiased, dependable, and non-invasive home inspection services and radon testing to the Columbia River Gorge and the greater Portland and Vancouver metro areas. We strive to be an asset to every client who comes our way, adhering to InterNACHI’s excellent Standards of Practice so that the quality of our service is never in question.\nWe don’t settle for a run of the mill home inspection, and neither should you when you contract with us to perform a home inspection, you’ll enjoy flexible scheduling, top quality customer service, and the most accurate home inspection available.\nSafety should always be a priority, and we’ll work diligently to make sure that your home is safe and sound, meticulously assessing even the most minute details to check for dangerous defects.\nWe go the extra mile for our clients and do everything we can to take the stress out of your experience.\nGorge Quality Home Inspection is a veteran owned and operated business. Greg Felten takes great pride in putting out a consistently high-quality product, eliminating uncertainty and stress by providing a friendly and knowledgeable service that is centered around the success of every client. One of Greg’s primary motivators for doing home inspection work is being able to play an important role in taking care of the people in our local communities. This of course includes prospective newcomers to the area because buying a home is a difficult process, no matter who you are or where you come from.

Recommended by100%of homeowners
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Radon Detection and Reduction FAQs, answered by experts

No, radon mitigation systems do not decrease home value or make a home harder to sell. In areas where homes experience similar radon exposure risks, a radon mitigation system is viewed as an improvement. Potential homebuyers often opt to buy a home with a radon mitigation system already installed to reduce the risk of cancer for their families.

Abatement includes sealing entry points and venting with systems that reduce radon levels below recommended EPA limits. It is handled by certified professionals.

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.

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.

You'll need to test your home for radon after installing the mitigation system, then again every two years. If radon remains elevated, contact a licensed radon professional, either the contractor who installed the system or a different one, and have them evaluate the system. They may need to make some changes to improve its effectiveness and performance.

The Washougal, WA homeowners’ guide to radon detection and reduction services

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