Beenyup wastewater treatement plant

Effects of climate change

Climate change is a global issue with a very real local impact. The biggest challenge we continue to face is declining streamflow into our dams and irregular rainfall throughout WA.

Find out more about WA & climate change

How Perth's water sources have changed over time

Climate change has dramatically affected where we get our water from. We can no longer rely on the rain to meet our water needs.

As we continue to feel the impacts of climate change, we have adapted. We are working with government, partnering with businesses and supporting the community to take action on climate changes.

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: Sunday, 26 June 2022 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.

WA & climate change


The effects of climate change are being felt across all of Western Australia in several ways, making water conservation and waterwise habits vital. Find out how the environment around you and your community is being impacted.

City of Canning conference Water Corporation attendees
02 Jun 2022 | Update

Fighting climate change with big data

Water Corporation presented the power of data at the City of Canning's Changing Your World conference.

  • Climate change
  • Environment
Image of lady walking with a pram by the water at Picnic Cove Park in Joondalup
12 Aug 2021 | Update

Groundwater isn't being replenished as it once was, affecting local wildlife

Declining groundwater levels are threatening the habitat of some native species.

  • Water sources
  • Climate change
Water Corporation CEO Pat Donovan and DBCA staff member Mitch Borgogno.
24 Nov 2020 | Update

Planting for the future – helping the Carnaby’s cockatoo soar to new heights

Water Corporation is rehabilitating feeding grounds for the critically endangered Carnaby’s black cockatoo. Revegetation also helps to protect and recharge the Gnangara groundwater system.

  • Environment
  • Climate change
  • Community

What we’re doing

Adapting our water sources

We have had to adapt to the impacts of climate change in order to protect our unique WA lifestyle. Through the development of new water sources, we have been able to climate-proof the state. Learn about our water resources and how we are investing in solutions to conserve water through our sustainability programs.

Sustainability & environment

We recognise the impact of our operations and remain fully committed to reducing our environmental footprint.

What you can do to help

One way we can work together as a community to take action on climate change is saving water, which also saves energy. Find our easy solutions on how you can conserve water in your home and garden here.

Commitment to innovation

We recognise the impact of our operations and remain fully committed to reducing our environmental footprint while providing solutions to conserve water.