Mold Testing Services of Oregon

Certified mold inspections. Trusted expertise

Mold Testing Services of Oregon (MTSO), is based in Portland and specializes in mold inspections, mold testing, and mycotoxin assessments in residential and light commercial properties.

Our Services

Services you can trust

We serve a broad range of clients, from those navigating mold-related health concerns to those seeking peace of mind about their indoor environment. Because we do not perform remediation, our findings remain entirely objective and transparent.

Mold and mycotoxin testing

By using laboratory-grade equipment, we provide a vast array of mold testing services so we can cater to meet your specific needs and budget.

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Indoor air quality testing

More than 90% of all homes have at least one indoor air quality problem. Let us identify and solve problems that impact your health, comfort, and safety.

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Certified radon testing

Radon is the second leading cause of lung cancer in the United States, following smoking. Even short-term exposure to high radon levels can be dangerous.

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Contact us about MTSO services here, or let us know how we can help.

MTSO uses accredited EmLab P&K for laboratory services.

MTSO utilizes the accredited expertise of Eurofins and RealTime Labs for analytical testing

I had a great experience with Garrett during a stressful time, first doing an initial test, and then two sets of clearance tests post-remediation. Garrett is very responsive and accommodating, even coming on a Saturday when it was the only timing that worked.

Josh F.

We had a wonderful experience with Mold Testing Services of Oregon. Garrett was super helpful throughout the entire process and I’m so glad we went with the full inspection, as he found problems in areas we would have never considered checking. He was thorough and answered all our questions/concerns, and the sample analysis had a quick turn around! We would highly recommend!

Katie H.

Garrett was very professional and thorough during the testing and reporting process. We had some concerns due to one of our family member's autoimmune disorder that is affected by mold and we appreciation Garrett's thoroughness and expertise. Would definitely recommend!

Nicole O.

Garrett was great to work with—professional and thorough. He inspected our house from top to bottom and explained his findings clearly. We feel well equipped to make decisions about our house and steps to take to remediate.

Amy S.

Garrett came out within a weeks notice. He was extremely thorough and found alot of problem areas that I didn't suspect. He is extremely knowledgable and takes pride in the work that he does. I'm still early on in the remediation process but having such a trust worthy inspector has made this process easier.

Brittney W.
100
Years in Business
100
Completed projects
100
Positive online Reviews