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Understanding a Mold Air Sample Report
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Understanding a Mold Air Sample Report

How to read a spore-trap mold air sample report: spore counts, outdoor controls, spore types and why context matters.

By AirCare 365Last reviewed September 29, 20262 min read

This guide is general information, not medical advice. If you have health concerns, please consult a medical professional.

What the lab reports

Spore-trap reports list spore types identified and counts per cubic meter of air for each sample, including the outdoor control.

Reading a spore reportAIRCARE 365

Compare every room with the outdoor sample

Outdoor control
Living room
Bedroom closet

Illustration only. Similar or lower than outdoors is generally expected; noticeably higher, or a different mix of spore types, points to an indoor source worth investigating.

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Comparing indoor and outdoor

Because outdoor air always contains spores, results are commonly interpreted by comparing indoor samples to the outdoor control and looking at which spore types appear indoors.

Laboratory analysis of spore-trap samples
Laboratory analysis of spore-trap samples

The outdoor sample is your baseline. Every indoor number means more next to it.

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Why context matters

There are no federal limits for indoor mold spore levels. Results describe one moment in time and are most useful alongside moisture readings, visual observations and repeat samples. Your AirCare inspector explains results in plain language in your digital report.

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AirCare 365 provides mold air sampling and mold and indoor air quality testing across the Bay Area.

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