Industry Standards & Intelligence Hub

The ANSI/IICRC S500 Standard for Professional Water Damage Restoration is the baseline reference document for the water damage industry. It defines Categories of Water (1–3) based on contamination, and Classes of Water Damage (1–4) based on the amount of water absorbed by materials in the affected area.

The S500 provides the framework for equipment selection — air movers, dehumidifiers, and psychrometric monitoring — establishing that equipment placement must follow proper inspection, not replace it. The 6th Edition is currently in public comment period, with the most discussion around revised air movement calculation methodologies.

Until the 6th Edition is published, the 5th Edition remains the standard of care. All DRR field technicians are trained to current S500 protocols. Monitor iicrc.org for public comment deadlines and final publication.

The ANSI/IICRC S520 Standard for Professional Mold Remediation, 4th Edition, was published in May 2024 — superseding the 2015 3rd Edition. The S520 governs mold remediation scope, containment protocols, clearance criteria, and documentation requirements for professional remediation projects.

In December 2025, Congress cited the S520 in the 2026 National Defense Authorization Act (NDAA), making it the first IICRC standard written into federal law. All mold remediation in U.S. military housing and facilities must now follow the S520 4th Edition. Contractors referencing the 2015 edition are operating under outdated guidance.

Key updates in the 4th Edition include revised containment classifications, updated documentation and chain-of-custody requirements, and enhanced risk management procedures. DRR field personnel and project managers are trained to 4th Edition S520 protocols.

OSHA 29 CFR 1910 governs general industry safety standards and is the primary federal regulation for restoration workers operating in hazardous environments. Part 1910.120 (HAZWOPER) specifically governs work involving hazardous substances — including Category 3 sewage, biohazard, and chemical contamination — and requires both initial 40-hour certification and annual 8-hour refreshers.

Additional subparts applicable to restoration include 1910.134 (Respiratory Protection) and 1910.138 (Personal Protective Equipment). Compliance is not optional — OSHA citations on restoration jobsites have increased significantly, particularly for Category 3 water and demolition scopes.

DRR personnel maintain HAZWOPER 40-hour certification and follow a written safety program aligned to 1910 requirements on every applicable project.

The Infection Control Risk Assessment (ICRA) 2.0 framework, administered by the American Society for Healthcare Engineering (ASHE), establishes protocols for managing construction and restoration work in occupied healthcare facilities. ICRA 2.0 defines four Construction Activity Type classes (A–D) and four Patient Risk Group classes, which combine to determine required containment and precautionary measures.

Class IV ICRA containment — the highest level — requires full anteroom construction, negative pressure maintained at -0.01 in. w.g. minimum, HEPA filtration of all exhausted air, and strictly controlled worker ingress/egress protocols. Most hospitals and senior living facilities now require ICRA 2.0 certification as a vendor approval prerequisite.

DRR holds ICRA 2.0 certification and has performed Class IV containment projects in active occupied clinical settings. Coordination with facility EVS, Infection Prevention, and Engineering teams is standard practice on all healthcare scopes.