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Find Radon gas testers in Portland

Avatar for Oregon Restoration Co.
Oregon Restoration Co.
4.95(
125
)

Angi Approved

In business since 2008

Emergency services offered

Warranties offered

"Ambrosio was friendly and kind, made a thorough search through the attic and rooms of the house to evaluate the roof leak and resulting mold, and gave a detailed estimate of all the work that would be involved in remediation. Didn't charge for gas or estimate. We since haven't been able to get in contact for next steps, but appreciated the timely and thorough response for our initial request for evaluation."
1 neighbors recently requested a quote
Recommended by95%of homeowners
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Avatar for Alpha Environmental Services Inc
Alpha Environmental Services Inc
4.73(
112
)

Angi Approved

In business since 2002

Free estimates

Warranties offered

"The guys from Alpha took care of our attic issue in no time at all. They were clean and tidy in the access area - you'd never know they were even there. We would highly recommend them......."
1 neighbors recently requested a quote
Recommended by90%of homeowners
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Avatar for Cascade Radon Inc
Cascade Radon Inc
4.94(
157
)

In business since 1990

Free estimates

Emergency services offered

"Excellent from beginning to end. Very professional outfit from initial visit, quote, scheduling, work, followup. Price was reasonable, work quality went above and beyond, and radon levels dropped well below even the contractual level."
Recommended by99%of homeowners
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Global Plasma Solutions
5.00(
1
)

In business since 2008

Global Plasma Solutions is a manufacturing company that sells air purification systems primarily into the commercial and residential markets. Home owners can benenfit from our systems as they are easily adapted to any HVAC system. Go to www.gpshvac.com to find a certified contractor near you to have one installed within your home.

Recommended by100%of homeowners
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Certified Site Inspection & Radon Solutions
5.00(
1
)

In business since 2006

Free estimates

All Home Inspections include an extensive detailed report including digital photographs. Also included with the inspection are the following:\n**Discount price for Radon testing with full Residential Home Inspection. \n**Free pest & Dry rot report with full home inspection. \n**Detailed inspection report e-mailed within 24 hours of the inspection. \n**Free bounded color report with each inspection. \n**Free 112 page book "Now that you've had a HOME Inspection" with each inspection.

Recommended by100%of homeowners
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Avatar for Virtue Professional Maintenance Services
Virtue Professional Maintenance Services
4.83(
155
)

In business since 2005

Free estimates

"I contacted them for minor moss removal and treatment. The owner came out to look it over and told me I didn't really need removal, that treating it twice would take care of the problem without removing any granules from the shingles. He showed up a few days later and treated it. Although I don't see any remaining moss, I am going to follow his recommendation and have him do it again in the fall. The price was quite reasonable and the people were nice to deal with."
Recommended by92%of homeowners
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B&G Excavation and Plumbing LLC
4.92(
49
)

In business since 1989

Emergency services offered

"My entire experience with B&G was amazing, they were prompt to get me quotes and then work me into their busy schedule. The work performed exceeded my expectations on quality and time frame. I would highly recommend B&G without and reservations to anyone! Chris"
Recommended by97%of homeowners
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FAQs for radon gas testing projects in Portland, OR

Radon is the second leading cause of lung cancer in the U.S. The gas seeps through cracks in foundations and collects in basements and other low areas. Once you breathe it in, radioactive particles lodge in lung tissue and do long-term damage. Because you can’t see or smell radon, the EPA recommends testing your home every two years—and after major renovations—to keep your family safe.

Yes—every home should be tested. The EPA advises doing it at least every two years and any time you remodel, buy, or sell. On average, one in 15 houses nationwide sits above the recommended limit, and the only way to know where yours stands is a formal test. The equipment simply measures gas levels and won’t change your indoor environment, so the process is completely harmless.

Certified radon professionals—often home inspectors or dedicated radon mitigation contractors—handle testing. These radon testing professionals follow EPA protocols and use calibrated instruments to check levels throughout your house. Hiring a certified radon specialist means results you can trust for real estate deals, insurance requirements, and, most importantly, your family’s health.

Inspectors specialize in measuring radon gas levels, while licensed mitigation contractors design and install the systems that remove it. If your test comes back high, your inspector can point you to a qualified mitigation pro who will size and install the right fan, piping, or other equipment to bring levels down.

No—standard home air purifiers don’t touch radon. They’re built to trap dust and pollen, not radioactive gas. If testing shows high levels, you’ll need a dedicated mitigation system that vents the gas from beneath your home to the outdoors. Relying on a room purifier alone won’t keep your indoor air safe.

Opening a few windows in your home might dilute radon for a short time, but the gas seeps back in as soon as they’re closed. For a lasting fix, you’ll need a professional mitigation system—often a sub-slab depressurization fan—that pulls radon from beneath the foundation and safely vents it outside.

The Portland, OR homeowners’ guide to radon gas testings

From average costs to expert advice, get all the answers you need to get your job done.

See all articles