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.