The IICRC S500 standard classifies water damage into three categories. Category determines contamination level, required protocol, and ultimately, your total cost. Miami’s humid subtropical climate means Category 1 events that go unaddressed for more than 12–24 hours can upgrade to Category 2 or 3.
Category 1 — Clean Water
$1,500–$4,000
Burst supply lines, overflow from clean fixtures, rain entering through roof. Low contamination. Standard drying protocol. Mold risk moderate in Miami due to humidity.
Category 2 — Gray Water
$2,500–$6,500
Appliance leaks, washing machine overflow, toilet overflow without solids. Biological contamination present. HEPA air scrubbers required. Full personal protective equipment for technicians.
Category 3 — Black Water
$4,500–$15,000+
Sewage backup, seawater flooding, king tide intrusion. High biological and chemical contamination. Full containment, negative air pressure, EPA-registered disinfectants. In Miami, king tide flooding is automatically Category 3 seawater.