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greywater

n. (alternative spelling of gray water English)

Wikipedia
Greywater

Greywater ( also spelled graywater) or sullage is all wastewater generated in households or office buildings from streams without fecal contamination, i.e. all streams except for the wastewater from toilets. Sources of greywater include, e.g. sinks, showers, baths, clothes washing machines or dish washers. As greywater contains fewer pathogens than domestic wastewater, it is generally safer to handle and easier to treat and reuse onsite for toilet flushing, landscape or crop irrigation, and other non-potable uses. However, the use of non-toxic and low-sodium soap and personal care products is recommended to protect vegetation when reusing greywater for irrigation purposes. The application of greywater reuse in urban water systems provides substantial benefits for both the water supply subsystem by reducing the demand for fresh clean water as well as the wastewater subsystems by reducing the amount of wastewater required to be conveyed and treated.

Greywater, by definition, does not include the discharge of toilets or fecally contaminated wastewater of any kind, which is designated sewage or blackwater to indicate it contains human waste. However, under certain conditions traces of feces, and therefore pathogens, might enter the greywater stream via effluent from the shower or washing machine.

Usage examples of "greywater".

His father had sent letters to the Lord of Greywater over the years, but none of the crannogmen had ever called at Winterfell.

When I first dreamed the dream, back at Greywater, I didn't know their faces, but now I do.

No matter where he went, to Karhold or White Harbor or Greywater Watch, he'd be a cripple when he got there.

My lord, I need two of your longships to sail around the Cape of Eagles and up the Neck to Greywater Watch.