What should a technician do in a Category 3 water intrusion when high-risk individuals are...

The IICRC WRT body of knowledge states that whenhigh-risk individuals(such as the elderly, infants, immunocompromised persons, or those with respiratory conditions) are present during aCategory 3 water intrusion, anIndoor Environmental Professional (IEP)should be retained.

Category 3 water is grossly contaminated and poses significant health risks. The WRT manual explains that an IEP provides independent assessment, sampling strategies, and recommendations to protect occupant health and guide appropriate remediation decisions.

Increasing equipment or focusing on AHAM ratings does not address health risk evaluation. Mold testing is not automatically required and may not be appropriate during active mitigation.

Retaining an IEP ensures objective decision-making, regulatory alignment, and enhanced protection for vulnerable occupants, consistent with IICRC guidance.