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*The Angi rating for Radon Detection And Reduction companies in The Dalles, OR 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 The Dalles, OR 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 May 30, 2026

Find Radon detection and reduction specialists in The Dalles

Avatar for Absolute Environmental, LLC
Absolute Environmental, LLC
4.8(
12
)
Radon Gas - Abatement

Serving The Dalles, OR and surrounding areas

Approved

In business since 2019

Free estimates

Customers say: Quick response

"Mike came out to do Radon Mitigation at our property. We had received quotes from some local companies reaching into 5 figures! Mike not only did the job for a 3rd of the cost, but the radon levels were massively reduced to proper safe amounts. High quality materials used in the work, and he completed everything in one day. He is a super nice guy, who is very experienced at what he does, straight forward, and honest. You can't go wrong, and I would definitely recommend him to friends."
Same as outdoor air
Radon Mitigation
Radon Mitigation
Radon Mitigation
Almeda Ridge

+7

Response time1 day
Response rate88%
Recommended by100%of homeowners
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Avatar for SWAT Environmental, Inc.
SWAT Environmental, Inc.
3.9(
23
)
Radon Gas - Abatement

Serving The Dalles, OR and surrounding areas

In business since 1988

Free estimates

Credit card accepted

"There were some problems along the way . When those were pointed out via HomeAdvisor, the company responded and fixed what needed to be fixed with competence and generosity."
Recommended by90%of homeowners
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Radon Detection and Reduction questions, answered by experts

Installing a mitigation system reduces radon levels, which can cause lung cancer, providing peace of mind and long-term health benefits. It can also increase your home’s value, as many buyers prefer properties with radon safety measures in place. The investment is relatively low compared to the potential health risks associated with prolonged radon exposure.

A homeowner can install a radon mitigation system on their own. But it’s a challenging DIY that requires a lot of knowledge about radon mitigation as well as familiarity with local regulations. You do not want to risk an improper installation that leaves the system unable to detect radon or gives it a shortened life span. Relying on a professional is the surest way to guarantee a successful installation.

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.

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.

The The Dalles, OR 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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