Greywater or sullage (also spelled graywater in the United States and sometimes written as two words: grey water, gray water) refers to domestic wastewater generated in households or office buildings from streams without substantial fecal contamination, i.e. all streams except for the wastewater from toilets.
Greywater or sullage (also spelled graywater in the United States and sometimes written as two words: grey water, gray water) refers to domestic wastewater generated in households or office buildings from streams without substantial fecal contamination, i.e. all streams except for the wastewater from toilets.
Source: Wikipedia "Greywater" · CC BY-SA 4.0
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