Terms of the Trade: What Is Greywater? Terms of the Trade: What Is Greywater?
Greywater is all used water except that coming from toilets. This includes water from sinks, showers, washing machines, and dishwashers. In recent years, this wastewater has been used for irrigation in landscaping and crops and for other non-potable uses. Greywater undergoes treatment in urban facitilites before its use is redirected.