Remediation
Antimicrobials on water-damage jobs (S500)
In plain English
The S500 treats antimicrobials (biocides) as a supplement to cleaning, not a substitute: they come in when cleaning alone can't finish decontamination. Used wrongly they can hurt people, pets and wildlife, so the standard sets firm rules around them.
Not every water loss needs one. The restorer should decide whether an antimicrobial is appropriate at all, and for clean Category 1 water that hasn't turned into Category 2 or 3, it generally isn't. A building can be returned to a sanitary condition without one by stopping the water, removing contaminated materials that can't be saved, then remediating, drying and doing a final cleaning. Many antimicrobials are deactivated by dirt and organic matter, so pre-cleaning always comes first. The decision weighs benefits against risks and the client's own concerns and preferences.
Only products registered or authorized by federal or state government may be used, with any PPE the label specifies. Anyone applying them must be trained to use them safely and effectively. Safety data sheets (SDS) for every chemical on the job are kept on site and shown to anyone with a stake in the project who asks. Label directions must be followed exactly — in the United States, using a product in a way its label doesn't allow is against the law — along with federal, state and local rules, including any training and licensing requirements. Products and containers are disposed of as the label says.
Before anything is applied, the restorer should brief the customer on the risks and benefits, offer the label and SDS (and must hand them over if asked), ask about health conditions in the household that call for extra care, and get the customer's signed, written consent. Occupants and animals — especially children and anyone in poor health — should be out of the area during application.
Every application is documented: product, method, time, quantity, dilution and location.
Key points
- Clean first; antimicrobials only where cleaning can't finish the job — generally not for Category 1.
- Registered products only; trained applicators; SDS on site; follow the label exactly — it's the law.
- Brief the customer, ask about health conditions, get signed consent.
- Clear people and pets out before applying.
- Record product, method, time, quantity, dilution and location.
Official text
This topic is covered in our own words because the standard behind it is copyrighted; we cite it below rather than reproduce it.
Citations
- IICRC S500, ANSI/IICRC S500 Standard for Professional Water Damage Restoration — Secs. 7.1–7.3, antimicrobial (biocide) use in water damage projects, risk management, application, p. 30. Best practice
- IICRC S500, ANSI/IICRC S500 Standard for Professional Water Damage Restoration — Secs. 12.3.9–12.3.10.3, cleaning and decontaminating, antimicrobial risk management, customer right to know, use, safety and liability, p. 63. Best practice