What would be considered "grey water"?

Grey water refers to wastewater that is generated from domestic activities such as washing dishes, doing laundry, and bathing. It typically contains some level of contaminants, making it distinct from "clean" water, which is generally safe for consumption and does not pose a health risk. The water from appliances like dishwashers or washing machines fits this definition because it may contain organic matter, soap, and other residues that can lead to health risks if not handled properly. This classification is essential in water restoration situations, as grey water can still be reused for irrigation or other non-potable uses, but it requires treatment or proper management to ensure safety.

In contrast, rainwater collected from the roof and water from clean sources like tap water would not be classified as grey water because they do not carry significant contaminants. Meanwhile, water that has been treated for reuse could be either grey water or a different type, depending on its source and treatment processes.