Category 3 means don’t touch
When a drain backs up or a toilet overflows from the wrong side, the water is Category 3 — grossly contaminated with bacteria and pathogens. This is not a mop job. Keep kids and pets out of the area, don’t run water anywhere in the house if the main line is blocked, and don’t try to shop-vac it — aerosolizing contaminated water spreads it. The cleanup has three non-negotiables: extract it safely, sanitize everything it touched, and remove what can’t be sanitized.
Backups in the valley cluster in predictable places: older laterals in the near-downtown neighborhoods where tree roots have had eighty years to work, and low-lying streets where heavy rain overwhelms the line. A backup during a November storm is usually the city side plus your side failing at once — the cleanup can’t wait for the plumber to sort out whose pipe it was.
How a Category-3 job runs
The crew works in protective gear from the first minute. Contaminated water and solids are extracted and disposed of properly; porous materials the water touched — carpet, pad, drywall up to the wick line, insulation — come out bagged. Every remaining surface gets cleaned and sanitized with an antimicrobial, then dried to measured targets. You get the disposal and sanitizing documentation, and a written scope before any of it starts.
Dealing with this right now?
A person answers 24/7 — describe what you see and dispatch starts on the call.