Mold inspection and testing

Inspection comes first. The crew walks the area of concern, looks for moisture, visible growth, odors, and the water history of the building. That visit decides whether sampling adds useful information—or whether the next step is already clear from what can be seen and measured.

Sampling is used when it helps answer a defined question: Is indoor air elevated compared with outdoor air? Is that spot actually mold? Did cleanup work? It is not automatic on every job, and it is not a scare tactic to sell more work.

Mold spores exist outdoors. An indoor air sample by itself is hard to interpret. When air sampling is used, an outdoor sample is collected around the same time so indoor results can be compared with what was in the air outside.

Indoor types or amounts that look higher than the outdoor baseline can point to an indoor moisture source. Indoor results that resemble outdoor air can mean the building is reflecting the outside, not hiding a separate indoor problem. Either way, the moisture source still matters more than a single number.

An air sample captures what is in the air in that location at that time. It can help when you smell something, when growth may be hidden, or when a real-estate or clearance question needs an indoor-versus-outdoor comparison. When air sampling is used, the lab can also identify other common indoor particles alongside mold, compared against the outdoor sample.

A surface sample (often a swab or tape lift) is for a specific spot you can see or strongly suspect. It can confirm whether that material is mold and, when useful, what category the lab identified. Air and surface samples answer different questions; one does not automatically replace the other.

Collected samples are sent to PriorityLab, an AIHA-accredited third-party laboratory. The lab analyzes the samples; SCCS NWI explains how those findings fit what was seen on the inspection.

Samples typically ship the same day they are collected. Results are usually available in 2 business days. SCCS NWI releases a written report with sample IDs and locations, what the lab found, and a conversation about practical next steps—not a pile of unexplained spore counts.

The color of mold is not a diagnosis. Several molds can look green, brown, or black, and the same growth can look different as it dries. “Black mold” on a wall is not a medical finding and does not by itself decide the scope of work.

A report is not a health diagnosis, and no sampling plan inspects every hidden cavity. Moisture that is still present will keep feeding growth no matter what the lab named. Fix the water source; then decide what materials need cleaning or removal.

CDC information about mold

When the inspection shows work is needed, the crew contains the area so spores do not travel, removes materials that cannot be cleaned, and deodorizes what stays. Household belongings damaged by mold are cleaned or removed with that same plan—not left in a contaminated room.

Sampling is not automatic on every job. When post-work samples are in the scope, they go to PriorityLab. The work is not closed until those results come back clear for the sampled area.