Mold test results explained

An air sample represents one location during a short collection period. Weather, windows, HVAC operation, recent cleaning, occupancy, and disturbance can influence the result. Indoor samples are often considered alongside an outdoor comparison and samples from unaffected areas.

The report may list spore categories and estimated concentrations. Higher indoor levels or indoor types not represented outdoors can support further investigation, but interpretation still depends on the building history and inspection.

A tape lift, swab, or bulk sample can help identify material collected from one spot. It cannot show how far growth extends behind a surface or establish airborne conditions elsewhere.

The useful report includes clear sample IDs and locations so laboratory findings can be matched to photographs and field notes.

Ask what question each sample was intended to answer, whether control or outdoor samples were collected, what limitations apply, and how findings connect to visible conditions and moisture. Be cautious with anyone presenting a single universal safe or unsafe number for all indoor mold.

When SCCS NWI collects the samples, they go to PriorityLab. Results are usually ready in 2 business days; SCCS NWI releases the written report and walks through it with the inspection notes. Medical questions cannot be answered by a building sample. Share exposure concerns and relevant reports with a qualified healthcare professional.

EPA information about mold sampling