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How Perth's water sources have changed over time
Climate change has dramatically affected where we get our water from. Because rainfall is unpredictable, we now have a growing reliance on more energy-intensive and expensive, rainfall-independent drinking water sources. This includes desalinated seawater - water from the Indian Ocean with salt and impurities removed. There are fluctuations in our water source mix year to year, depending on how much rainwater we get. But, on average, Perth has relied on desalinated seawater over the past 5 years for around half of its drinking water supply. This is expected to increase in the future.

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Adapting our water supply to climate change
Ever wondered how climate change has affected our water supply?
Monthly Streamflow
2023
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Year to date
Historical *
- GL
Avg year to date
Difference
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- GL
Years of declining rainfall means less water flowing into your dams.
* Average monthly streamflow between 1911 - 1974

Environment and sustainability
We’re on the road to net zero greenhouse gas emissions by 2035. To meet our target, we’re not just looking into traditional renewables. We’re also recovering and reusing energy from our own operations. From solar to biogas to wind powered water, follow our journey so far.

Flexible payment options
We have flexible payment options to make managing bills easier for households and businesses.
Latest updates
VIEW ALL ARTICLESBushfire update – City of Wanneroo and City of Swan
Water Corporation is working to support emergency services battling bushfires in Perth's north.
Bridge closure - Forestry Road, Uduc, Shire of Harvey
Bridge 3716 on Forestry Road in Uduc has been temporarily closed to all traffic by Main Roads for emergency repairs.
Embedding waterwise thinking into everything we do
Our highly successful Waterwise Cities Program, which began in 2018, will now be transitioned into our core business.