what is greywater
Greywater is any household wastewater with the exception of wastewater from toilets, which is known as blackwater.Typically, 50-80% of household wastewater is greywater from kitchen sinks, dishwashers, bathroom sinks, tubs and showers.reshly generated greywater is not as nasty as blackwater, but if it's not handled properly it can soon become so. Greywater decomposes at a much faster rate than blackwater and if stored for as little as 24 hours, the bacteria in it use up all the oxygen and the greywater becomes anaerobic and turns septic.