Greywater is waste water from washing machines, laundry tubs, showers, hand basins and baths. It does not include waste water from toilets, urinals, bidets, or kitchens.
Greywater from residential premises (single households) is a resource and can be reused on-site for garden and lawn irrigation or, if treated appropriately, for toilet flushing and laundry use (washing machine only).
Substituting greywater for drinking water for these end uses will not only reduce the demand on drinking water supplies, but will also reduce the amount of sewage waste water discharged to the environment.
There are three ways of reusing greywater that can be implemented for sewered residential premises in NSW:
The NSW Office of Water has published guidelines for greywater use in households. The Guidelines relate to single, detached households only and do not include premises comprising more than one dwelling. The Guidelines can be downloaded here:
NSW Guidelines for Greywater Reuse in Sewered, Single Household Residential Premises (May 2008) (PDF, external link 1MB)
Providing the guidelines are followed Council approval is not required.
A number of fact sheets on greywater reuse for households are available on the NSW Office of Water's website. Click the link below for more details: