What Is AIHA
The American Industrial Hygiene Association (AIHA) is a professional organization that accredits laboratories performing environmental testing, including mold analysis. When you send a mold sample to an AIHA-accredited lab, you know that facility meets rigorous standards for equipment calibration, staff qualifications, and quality control procedures.
For mold testing specifically, AIHA accreditation means the laboratory follows standardized protocols for identifying mold species, quantifying spore counts, and documenting findings in ways that hold up to scrutiny. This matters because unaccredited labs may use inconsistent methods or lack the expertise to distinguish between harmless mold and species that trigger health problems like allergic reactions or asthma attacks.
Why It Matters
AIHA accreditation directly affects the reliability of your mold test results. The EPA does not mandate a federal lab certification system for mold testing, which means unregulated labs can operate without oversight. An Accredited Laboratory following AIHA standards provides objective data you can trust when deciding whether remediation is necessary and how extensive it needs to be.
Property managers and homeowners who work with AIHA-accredited labs avoid costly mistakes. You might over-remediate a minor issue or, conversely, miss a serious contamination problem if testing results are unreliable. AIHA-accredited facilities use standardized analytical methods, maintain equipment within acceptable tolerances, and employ analysts with documented training in mycology and air quality assessment.
Mold Testing and AIHA Accreditation
When you hire an Industrial Hygienist to collect mold samples, that professional should send samples to an AIHA-accredited laboratory. The lab will typically analyze samples using one of these methods:
- Viable culture analysis: Mold spores are grown on culture plates and identified to species. This takes 5 to 10 days but shows which molds are alive and present in sufficient quantities to cause health effects.
- Non-viable spore counts: Laboratory personnel use microscopy to count and identify spores in bulk samples or air samples. Results come back faster, usually within 48 hours, but do not indicate whether spores are viable.
- PCR testing: DNA analysis identifies mold species with high precision. Some AIHA-accredited labs now offer this method, which typically costs $150 to $400 per sample depending on the scope.
AIHA-accredited labs maintain chain-of-custody documentation, calibrate microscopes and air-sampling equipment monthly, and participate in proficiency testing to verify their results against known reference samples. This external quality check ensures ongoing accuracy.
Practical Application
After remediation work is complete, you may request clearance testing to verify that mold levels have returned to normal. AIHA-accredited labs provide results that meet the standards set by the Institute of Inspection, Cleaning and Restoration Certification (IICRC) and align with EPA guidance on acceptable indoor mold levels. While the EPA has not established a legal threshold for mold, typical post-remediation clearance targets aim for spore counts less than 1,500 spores per cubic meter of air and species composition similar to outdoor air samples.
Insurance companies often require testing results from AIHA-accredited laboratories before approving claims related to mold damage. Likewise, if you are buying or selling a property with a history of mold, lenders may require clearance testing from an accredited facility before financing the sale.
Common Questions
- How do I know if a lab is truly AIHA-accredited? Check the AIHA website directly or ask the lab for their accreditation number. Do not rely solely on what a lab tells you; verify independently.
- Is AIHA accreditation required by law for mold testing? No, but it is the gold standard for reliability. Some states have started developing mold licensing requirements, but federal law does not currently mandate AIHA accreditation. However, using an accredited lab protects you legally if testing results are later disputed.
- What is the cost difference between AIHA-accredited and non-accredited labs? AIHA-accredited labs typically charge 20 to 40 percent more because they maintain higher standards and overhead. A non-viable spore count sample might cost $75 at an accredited lab versus $50 at an unaccredited facility. That small difference is worth the certainty.