Safety protocols vary significantly based on water contamination category and extent of damage. Category 1 water typically requires standard safety measures and drying procedures, while Category 2 water demands careful assessment to determine which materials can be dried versus those requiring removal. Category 3 water typically requires material removal, environmental remediation, and strict safety protocols to protect workers and occupants from pathogenic contamination. Professional assessment creates specific safety requirements and restoration procedures customized to the water category, extent of damage, and building characteristics to ensure worker and occupant protection while preventing contamination spread.