Greywater

Oct 10, 2022, 15:52 PM
Title : Greywater

What is greywater?

Greywater is wastewater which comes from the bath, shower, bathroom wash basins, clothes washing machine, laundry trough and kitchen sink.

Western Australia often experiences water restrictions due to low rainfall and the critically low levels of surface water storage. Many people are interested in conserving water by reusing their greywater.

Greywater may be used via manual bucketing or an approved greywater system.

Greywater characteristics will vary according to the number of household occupants, their age, health, water use patterns and the household fixtures from which the greywater is drawn.

What are the requirements for greywater use?

The Code of Practice for the Reuse of Greywater in WA further explains the requirements for greywater use, and provides information on required design and performance requirements for people seeking to have new products approved.

If you are applying greywater manually, the following guidelines should be adhered to:

  • Apply greywater in several locations to prevent pooling
  • Only bucket greywater to areas that are inaccessible to children and pets.
  • Don’t use greywater from the washing of nappies or soiled clothing.
  • Don’t use greywater if a member of the household has an infectious disease.
  • Don’t put greywater on edible plants or fruit.
  • Don’t store greywater.
  • Don’t over water. Too much greywater can clog the soil, causing pooling and the development of grey/green slime areas.
  • If you are installing a greywater reuse system, it needs to be of a design approved by the Department of Health and properly installed.

What is the installation process?

If you wish to install a system you must lodge an Application to Construct or Install an Apparatus for the Treatment of Sewage with the Shire. This is to ensure that the system is of an approved design, manufacture, and is properly sized and located.

It is an offence to install a wastewater system without an approval and it is also an offence to commission the system prior to final inspection and approval to use from the local government.

The Western Australian Government provides a rebate to help people to be more water wise by offering rebates on a variety of products, including greywater systems.

Information on this can be obtained from the Department of Water website.

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