Overview
Greywater is used household water sourced from baths, showers, bathroom basins and laundries, but excludes water from the toilet (which is regarded as 'blackwater'). Generally, greywater from the kitchen is not recommended for reuse due to the high levels of organic materials such as oils and fats.
Availability of greywater
Greywater can provide a climate-independent resource for reuse, subject to continued occupancy of a house and the number of people in a household.
Water Corporation's Waterwise Calculator can assist in estimating your water usage and the potential volume available for greywater reuse from the bath, shower and laundry.
Greywater generation will vary according to the water usage practices of each individual in the household and the use of water efficiency devices.
The Department of Health Code of Practice for the Reuse of Greywater in Western Australia 2010 provides information on greywater reuse options and volumes.