Gnangara groundwater system
The Gnangara Groundwater System is the largest groundwater source in WA.
It comprises of three different aquifer layers:
- Superficial aquifer - the shallowest aquifer which stretches across the coastal plain
- Leederville aquifer - below the superficial aquifer, and is often several hundred metres thick
- Yarragadee aquifer - the deepest aquifer which offers vast storage and a robust supply
The Gnangara Groundwater System remains vital to our drinking water supply. Find out more about the Gnangara Groundwater System.
What is an aquifer?
An aquifer is a mass of permeable rock which can transmit or hold groundwater. When water enters an aquifer, it moves slowly to the lower-lying places and is eventually discharged and transferred to wells and springs. Wells can be drilled into the aquifers and water can be pumped out.