How to interpret an air sampling report
Receiving an air sampling report can raise questions. What do the numbers mean? Are the values normal? Here we provide an introduction to interpreting the results.
Report structure
A typical report contains:
- Background – why the sampling was carried out
- Method – how the samples were taken and analysed
- Results – measured values in tabular form
- Assessment – comparison against reference values
- Recommendations – suggested actions if applicable
Understanding reference values
Reference values indicate levels that are considered acceptable. There are different types:
- Occupational exposure limits (for the work environment)
- General reference values for indoor air
- Reference values for mould spores
If measured values exceed reference values, it does not necessarily mean an immediate hazard, but it signals that action may be needed.
Common questions when interpreting
"The values are just below the limit – is that good?" – Reference values have margins, but trends and source analysis can be just as important as exact numbers.
"The report mentions species I don't recognise" – Mould species have Latin names. The report should indicate whether the species are common or indicate specific problems.
"I don't understand the comparison" – Ask for a walkthrough. A good report should be comprehensible, and the person who performed the sampling should be able to explain the results.
Frequently asked questions
It indicates that action may be needed. The report should provide recommendations on appropriate next steps.
Yes, if the sampling method and conditions are comparable. Trends over time can be valuable.
Transparency builds trust. The results can be a good basis for dialogue with affected parties.
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