Sample Mold Lab Report
See what an Air-O-Cell spore-trap report actually contains, compare the three anonymized samples, and understand what the numbers can — and cannot — tell you.
Laboratory report
LA Testing
South Pasadena, California
- Analysis
- Air-O-Cell
- Sample volume
- 75 L each
- Methods
- MICRO-SOP-201
- Standard
- ASTM D7391
LA Testing remains the author of the laboratory report. The explanation on this page is a separate Mold X educational summary, not a revised laboratory conclusion. Laboratory identity and laboratory copyright notices remain in the PDF.
Property and project details, client identifiers, account and report identifiers, signatures, and original source sample labels have been permanently removed. Original report and laboratory dates and timestamps remain. Sample labels and locations are generalized. Visible black bars mark permanent redactions. The first name Richard remains; the surname is removed.
— Result snapshot
Three samples. One comparable unit.
The report converts each raw microscopic count from the same 75-liter sample volume into counts per cubic meter. That normalized concentration makes the submitted samples easier to compare. Source: report pages 5–7.
Sample A
Outdoor control
1,860
total fungi count/m³
- Raw count
- 46
- Background rating
- 2
Sample B
Indoor bedroom/bath area A
1,220
total fungi count/m³
- Raw count
- 31
- Background rating
- 2
Sample C
Indoor bedroom/bath area B
1,820
total fungi count/m³
- Raw count
- 45
- Background rating
- 3
In this time-specific sample set, both indoor total-fungi concentrations were below the outdoor control: 1,220 and 1,820 count/m³ indoors versus 1,860 count/m³ outdoors. This comparison does not establish that a space is safe, that mold is absent elsewhere, or that remediation is or is not necessary.
— Read beyond the total
The pattern matters more than one number.
Total fungi combines detected categories. The analyte rows show why interpretation also looks at composition, collection conditions, building observations, and the selected indoor and outdoor locations.
“++” indicates a category that includes spores with similar morphology. Values shown below are count/m³ from report pages 5–7.
| Detected category | A · Outdoor | B · Indoor A | C · Indoor B |
|---|---|---|---|
| Aspergillus/Penicillium++ | 200 | 520 | 200 |
| Cladosporium | 1,100 | 300 | 1,000 |
| Basidiospores | 300 | 200 | 200 |
| Hyphal fragments | 90 | 90 | 90 |
— How to read the report
Four ideas make the tables easier to follow.
Raw count
The number of particles observed during the laboratory examination. Here, raw counts are converted using the submitted 75-liter sample volume.
Count per cubic meter
The report’s normalized concentration unit. It supports comparison among these samples, but it is not a universal pass/fail threshold.
Morphological category
Direct microscopy identifies visible features. Some groups, including Aspergillus/Penicillium++, cannot be further differentiated by this method.
Background rating
A reported particulate-background observation. High background can obscure spores and cause underestimation; it is not a safety score.
— Important boundaries
A lab report is evidence, not a verdict.
Results are interpreted with site observations, environmental measurements, sampling context, and the laboratory’s stated limitations. The report does not establish universal safe or unsafe fungal-spore levels.
- Direct microscopy includes viable and non-viable spores; it does not culture or grow fungi.
- Some fungal groups cannot be differentiated by this method and are reported in broader morphological categories.
- Spore-trap collection is biased toward larger spores, and the laboratory cannot verify field-provided sample volumes.
- No discernable field blank was submitted with this sample group.
- High background particulate may obscure spores and lead to underestimation.
- Results apply only to the samples reported and represent one part of an indoor-air-quality investigation.