Water Corporation wind farm

What has wind got to do with it?

With around half of Perth's water coming from energy-intensive desalinated seawater, our goal is to reduce carbon emissions to net zero by 2035.

Learn about our plan

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.

Climate & environment

We have had to adapt to the impacts of climate change to protect our unique WA lifestyle. By developing rainfall-independent drinking water sources, we're securing our water future. Learn about how climate change is impacting our state, our water sources, and our journey to a sustainable water cycle.

Streamflow & rainfall

Declining rainfall is affecting the amount of rainfall runoff (streamflow) into our dams. Stay up to date with streamflow and rainfall data and find out how our water use is tracking.

Learn more

Perth’s winter rainfall is predicted to decrease by up to 15% by 2030.

Updated: Tuesday, 16 January 2024 Learn more about how this data is updated

To 9am



May total

May average*







268 GL

Last year


284 GL



-16.2 GL

* Average monthly rainfall (for the period 1876 - 2016).
Dam volumes, rainfall and water use data is updated every working day, streamflow is updated weekly.

Adapting our water sources

We're the largest water utility globally, by area serviced, on the world's driest inhabited continent. With this, we face significant climate change impacts. Find out how we've diversified our water sources to ensure a secure water supply.

News & updates


Stay up to date on how we are evolving and working to deliver water in the most sustainable way possible throughout Western Australia.

Our Partnerships and Education team are taking proactive steps towards education for sustainability.
29 Sep 2023 | Update

Education for sustainability

Our Partnerships and Education team are taking proactive steps towards education for sustainability.

  • Education
  • Climate change
Our Southern Seawater Desalination Plant
28 Nov 2022 | Update

Wind is powering our way to net zero

We are on a mission to deliver drinking water in the most sustainable way possible. That’s why we’re developing one of WA’s largest wind farms. This will provide us with a quarter of our clean energy needs.

  • Environment
  • Climate change
Testing treated wastewater
01 Sep 2022 | Update

Giving back to Perth's groundwater supply

We were the first utility in the country, and among the first in the world, to use groundwater replenishment. Stage 2 is now complete allowing us to recharge Perth's aquifers with up to 28 billion litres of purified recycled water each year.

  • Climate change
  • Wastewater
  • Environment