Category 1: clean water
Clean water comes from a sanitary source — a supply line, a faucet, rainwater, or a burst pipe. It's the least hazardous, and if dried quickly, most materials can be saved. But left to sit, clean water degrades into gray water within a day or two as it picks up contaminants.
Category 2: gray water
Gray water carries some contamination — think dishwasher or washing-machine discharge, a leaking aquarium, or a sump-pump overflow. It can cause illness if ingested and requires more careful cleaning and often removal of soaked porous materials like carpet padding.
Category 3: black water
Black water is grossly contaminated and a genuine biohazard — sewage backups, flooding from rivers or storms, and any water containing pathogens. It requires protective equipment, disposal of contaminated materials, and full disinfection. Never clean black water yourself.
Not sure which you're dealing with? Assume the worse and call — we assess and handle all three. See our 24/7 restoration service.
Frequently Asked Questions
What's the difference between clean, gray, and black water?
Clean water is from a sanitary source (supply line, rain), gray water carries some contamination (appliance discharge, sump overflow), and black water is a biohazard (sewage, storm flooding). Each needs a different, more cautious cleanup.
Does clean water damage become dangerous over time?
Yes — clean water degrades to gray, then black, as it sits and picks up contaminants and bacteria. That's another reason to start extraction and drying quickly.
Dealing with damage right now? We offer 24/7 emergency water damage restoration and mold remediation across Lancaster County. Call (717) 910-6114 for a free quote.