When a restoration professional walks into your home, the first determination they make is the water's category. Category 1, 2, or 3. The category drives everything: what equipment we deploy, what we have to demolish vs. dry in place, what your insurance will and won't cover.
Category 1: clean water
Sanitary water from a clean source — burst supply line, broken water heater, melting snow, overflowing sink. Doesn't pose a substantial health risk on initial contact. Most water losses START as Category 1.
Drying scope: relatively simple. Extract, set air movers and dehumidifiers, monitor moisture daily, restore.
Category 2: gray water
Water with some level of physical, chemical, or biological contamination — washing machine discharge, dishwasher overflow, water from a sump pump that's failed. Or Category 1 water that's been sitting more than 48 hours.
Drying scope: removal of saturated soft goods. Carpet pad is typically a goner. Selective demolition begins.
Category 3: black water
Grossly contaminated water that contains pathogens, toxins, or sewage. Sewer backups, toilet overflows containing fecal matter, flood water that's traveled across the ground. Or Category 2 water that's been sitting more than 48 hours.
Scope: PPE required, all porous materials must be removed (carpet, drywall to a certain height, cabinet bottoms in contact). Decontamination of all hard surfaces with EPA-registered disinfectants. Drying happens after demolition, not in place.
Why this matters for your bill
Category 1 mitigation runs roughly $1,500–$3,500 for a typical residential loss. Category 3 for the same affected area can run $6,000–$15,000 because of the demolition, disposal, and decontamination. The difference is almost entirely a function of how fast mitigation started.
This is why "call us before you call insurance" is consistent advice from restoration professionals. Insurance adjusters can take a day. Restoration crews can be there in hours. The hours matter.
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