What is the one thing that connects us all? Our water.


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Desalination is the removal of salt and impurities from seawater to produce drinking water, and it’s how Perth gets nearly half of its water supply. Find out more.


Groundwater comes from rain that trickles into the ground and is stored in spaces between soil and rocks – also known as aquifers. A significant portion of our drinking water comes from groundwater. Find out more.

Rain & Dams

We’re getting less rain, which means less water flowing into our dams. So we no longer solely rely on rainfall for Perth’s water supply. In fact the water in our dams is no longer just made up of inflows from rain – they store groundwater and desalinated seawater too. Find out more.

Groundwater Replenishment

This innovative process is where wastewater is treated to drinking water standards and then recharged into our groundwater supplies. The water is stored and naturally filtered in our underground aquifers until we need it. Find out more.

Climate change is real

Climate change is having a significant impact on Perth’s water supply. Since the 1970’s, Perth’s rainfall has reduced by around 20%. Because it rains less, where we source our water from has had to change. We all have a role to play in using water wisely. Find out more.

Water Recycling

When water goes down the drain, it isn’t wasted. We either recycle this precious resource for our groundwater replenishment scheme or for other uses, or it naturally enters the water cycle all over again. Find out more.

Planning for the Future

Over the past decade we’ve introduced new climate independent water sources, like seawater desalination and groundwater replenishment, to help secure supplies. We’re not done there though; we have a long term plan in place to secure our water future for generations to come. Find out more.

Our network

Perth’s water supply network supplies drinking water to more than 2 million people through around 35,000 km of water pipes! Once you’ve used water it becomes wastewater in our 17,000 km of wastewater pipes before getting treated at a wastewater treatment plant. Find out more.