Certified mold inspections in Portland, Oregon
Mold Testing Services of Oregon (MTSO) is Portland's trusted, independent inspection company specializing in mold testing, mycotoxin assessments, and indoor air quality testing for residential and light commercial properties. Because we don't perform remediation, our findings are always objective.
Expertise 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 & mycotoxin testing
Certified mold and mycotoxin testing using lab-grade equipment and accredited labs. Air sampling, surface sampling, ERMI, and EMMA testing available.
MTSO utilizes the accredited expertise of Eurofins and RealTime Labs for analytical testing
Common questions about mold testing in Portland
A mold inspection is a visual assessment of your property for signs of mold growth and moisture conditions. Mold testing involves collecting air or surface samples that are analyzed by an accredited laboratory to identify mold species and concentrations. MTSO performs both as part of a comprehensive assessment.
If you notice a musty odor, visible mold growth, water damage, or unexplained health symptoms — such as respiratory issues, headaches, or brain fog — mold testing is a practical next step. Testing is also recommended before buying or selling a home.
No. MTSO specializes exclusively in mold inspection and testing. We don't perform remediation, which means our findings are always objective and free from any conflict of interest.
We serve the greater Portland Metro area — including Beaverton, Lake Oswego, Gresham, Tigard, and Hillsboro — as well as Southwest Washington, including Vancouver, WA.
At Mold Testing Services of Oregon, we understand that each property presents its own set of challenges. We tailor our mold inspections and testing to suit the unique needs of your residential or commercial space. With years of experience, we are dedicated to providing not only precise results but also clear, actionable insights. Our goal is to ensure that you feel fully informed and confident in the decisions you make regarding your property.
We take great pride in our use of cutting-edge technology, including thermal imaging and moisture detection, to uncover hidden mold and moisture issues that might otherwise go undetected. With our partnership with accredited laboratories, every result is scientifically sound, offering you a comprehensive and trustworthy assessment of your indoor environment. With us, you can rest assured that every finding is backed by integrity, precision, and the latest in mold detection technology.
As a fully certified and insured, family-owned business, we are proud to offer a level of service and attention that larger companies simply can’t match. Our commitment isn’t to volume; it’s to quality. We dedicate our time and expertise to each client, ensuring that every inspection is thorough, every result is clear, and every client receives the personalized care they deserve.
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.
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!
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!
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.
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.