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.

The Perth Seawater Desalination Plant, located in Kwinana, started operating in November 2006 and produces 45 billion litres of fresh drinking water a year.
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 undertake comprehensive marine monitoring and work closely with local groups to ensure the health of the Sound is maintained. Since operations began, we have met all environmental requirements. We also regularly inspect all offshore infrastructure to make sure the plant is working at maximum efficiency.

We undertake continuous, real-time water quality monitoring of water entering and leaving the plant, in addition to routine marine monitoring at various locations in Cockburn Sound and regular performance tests on the diffuser system to ensure it is performing as required.

As part of our operating license issued by the Department of Environment Regulation and conditions & commitments specified in Ministerial Statements 655 and 832 issued by the Office of the Environmental Protection Authority, comprehensive monitoring is conducted to ensure there are no adverse environmental impacts on the marine environment from our operations.

Read our most recent compliance report here.

Underwater footage from the plant

Protecting the coast

In partnership with the Perth Region Natural Resource Management group, staff at PSDP 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 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.