Greywater (Paperback)

Greywater is wastewater generated from domestic activities such as dish washing, laundry and bathing. Greywater comprises 50-80% of residential wastewater generated from all of the house's sanitation equipment except for the toilets. Water from the toilets is designated sewage or blackwater to indicate it contains fecal matter and urine. Greywater gets its name from its cloudy appearance and from its status as being neither fresh (white water from groundwater or potable water), nor polluted (sewage). According to this definition, wastewater containing significant food residues or high concentrations of toxic chemicals from household cleaners, etc., may be considered "dark grey" or dirty water.