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*The Angi rating for Radon Detection And Reduction companies in Walla Walla, 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.

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Last update on December 28, 2025

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

Avatar for Advanced Radon Technologies
Advanced Radon Technologies
4.5(
42
)
Radon Gas - Abatement

Serving Walla Walla, WA and surrounding areas

In business since 1971

Free estimates

Warranties offered

"Top notch! The owner is one of the top radon mitigation experts in the country. ART runs 7 full-time crews. The crew sent to our home was experienced and professional. The work quality was first rate."
Residential Systems
Residential Systems
Residential Systems
Residential Systems
Residential Systems

+11

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

No level of radon is technically safe, but since it is present everywhere, complete avoidance is impossible. 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 preventative measures if your home's radon levels are between 2 and 4 pCi/L or higher.

The cost for a radon mitigation system typically ranges from $800 to $1,500, with an average around $1,000. The final price depends on several factors, including the size of your home, the severity of the radon issue, and the type of system required. Your home's foundation type also significantly impacts the cost. For example, sealing and ventilating an unfinished basement might cost around $4,600, while encapsulating a crawl space without a foundation slab can range from $1,500 to $15,000.

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.

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

There are steps you can take as a homeowner to remediate radon yourself. While a radon reduction professional can make the biggest impact in your home, you can make efforts to improve radon levels on your own by sealing cracks, increasing ventilation, and testing for radon regularly.

The Walla Walla, WA 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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