Securing Perth's water supply

We have a long term plan in place to secure our water future for generations to come.

We first released our 50-year plan to secure Perth's water supply in 2009, in response to the early signs of a drying climate and with extensive consultation with the community. We followed this with a second 10-year plan in 2011.

Since the 1970's rainfall has reduced by around 19% but streamflow to dams has declined much more dramatically. Over the last decade, we have introduced new climate independent sources of water - seawater desalination and groundwater replenishment - to help secure supplies.

By 2030, providing our water use reduction and recycling targets are met, we expect a further 70 to 100 gigalitres of additional climate independent water will be required to support Perth's water needs.

Our plans to secure Perth's water supply into the future include:

  • continuing to help Perth households and businesses use even less water and make greater use of recycled water
  • expanding our Groundwater Replenishment Scheme and investigating further opportunity for reuse of treated wastewater
  • increasing the capacity of our existing desalination plants
  • expanding our deep groundwater network
  • investigating new desalination plants at Kwinana and Alkimos.