Perth Seawater Desalination Plant

The Perth Seawater Desalination Plant, located in Kwinana, produces 45 billion litres of fresh drinking water a year – around 18% of Perth’s water supply. It started production in 2006.

The plant has won numerous national and international awards including the International Desalination Association’s International Desalination Plant of the Year in 2007.

Protecting the environment

We are dedicated to protecting the marine environment of Cockburn Sound. We achieve this by:

  • undertaking continuous, real-time water quality monitoring of water entering and leaving the plant,
  • undertaking routine marine monitoring at various locations in Cockburn Sound and regular performance tests on the diffuser system
  • working closely with local groups and;
  • regularly inspecting all offshore infrastructure to make sure the plant is working at maximum efficiency

Since operations began, we have met all environmental requirements as detailed in our operating licence issued by the Department of Environment Regulation and the conditions and commitments specified in Ministerial Statements 655 and 832 issued by the Office of the Environmental Protection Authority.

Read our most recent compliance report.

Underwater footage from the plant

Protecting the coast

In partnership with the Perth Region Natural Resource Management group, we undertake regular planting of native shrubs in the dune area adjacent to the plant. This has helped to stabilise the dune system, preventing erosion and encouraging native fauna back to the area after construction was complete. We also hold an annual clean-up of rubbish on the stretch of beach adjacent to the plant.

Working with our stakeholders and the community

We continue to work closely with the Cockburn Sound Management Council (CSMC) and support their ongoing environmental monitoring and annual reporting requirements. Water Corporation is an active member on the CSMC Reference Group and Kwinana Industries Council.  

Underwater photos

Inspections of our marine intake show a variety of fish, crabs, octopus, seahorses, mussels, barnacles, sponges, algae and hard and soft corals colonising the outfall.

All photos were taken by Fremantle Commercial Diving on behalf of Water Corporation.