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Verified Reviews for Radon Detection And Reduction pros in Rainier, WA

*The Angi rating for Radon Detection And Reduction companies in Rainier, 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 Rainier, 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 September 16, 2026

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

Avatar for 5 Microns Inc.
5 Microns Inc.
4.9(
74
)
Radon Gas - Testing

Serving Rainier, WA and surrounding areas

Approved

In business since 2019

Free estimates

Small jobs welcome

"Pascal was the first one to call and kept in touch throughout the whole process. He was on time and professional yet personable. My husband was impressed with his knowledge and professionalism as well. We got the results within 2 business days. We would highly recommend Pascal to anyone needing mold testing services."
Vinyl sheeting asbestos test
Wall asbestos test
Asbestos air test
Mold and moisture testing
Mold air test

+32

Response time3 hrs
Response rate98%
Recommended by100%of homeowners
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Avatar for SWAT Environmental, Inc.
SWAT Environmental, Inc.
1.8(
4
)
Radon Gas - Abatement

Serving Rainier, WA and surrounding areas

In business since 1988

Free estimates

Credit card accepted

SWAT Environmental is the nation's largest radon abatement engineer. Our experienced staff has corrected radon problems for over 60,000 customers since 1988 with 100% success!

Recommended by50%of homeowners
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Avatar for Diversified Crawlspace Services
Diversified Crawlspace Services
3.6(
20
)
Radon Gas - Abatement

Serving Rainier, WA and surrounding areas

In business since 1992

Free estimates

Emergency services offered

"Diversified Crawl Space services helped us in our water drainage issues. Their crew was professional, on time, and well organized. They installed a crawl space drain system to take care of our wet crawl space. These guys also gave us the reasonable pricing. I would recommend Diversified to anyone looking to do water damage restoration related services over other pricey options."
moldy crawlspace
New access door
Rat slab
a moldy attic
After cleanup and mold treatment

+2

Response time7 hrs
Recommended by90%of homeowners
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American Building Solution LLC
New to Angi
Radon Gas - AbatementRadon Gas - Testing

Serving Rainier, WA and surrounding areas

In business since 2014

Free estimates

Emergency services offered

Professional handyman services as well as Residential and Commercial property maintenance. \n \nWe specialize in room additions and full home remodels along with residential and commercial property electrical, plumbing, carpentry, and interior and exterior tenant improvements, re-keying, painting, landscaping, and all other property maintenance and construction services. \n \nProperty managers: we specialize in local handyman work and property maintenance needs. \n \nhttp://www.handymanintacoma.com/

Kitchen, bath
bathroom
shower
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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.

The natural breakdown of uranium in soil, rock, and water can cause radon to appear in a home. The gas seeps into homes through cracks in foundations, walls, or floors, as well as through gaps around pipes or construction joints. Radon levels are influenced by soil composition, building materials, and ventilation. Poorly sealed or airtight homes can trap radon, allowing it to accumulate.

Testing every 2-5 years or upon adjusting occupancy or structural changes maintains safe environments.

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 naturally present everywhere, it is impossible to avoid entirely. 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 action to reduce radon levels if your home's test results are between 2 and 4 pCi/L or higher.

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

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