We need steady, regular rain in order to soak our catchments and get water flowing into our dams. Slowly declining rainfall means Perth's dams receive much less streamflow than in past years. Streamflow is the amount of water entering our dams from our catchments and is measured by changing water storage levels.

The streamflow figure shown below is for all the dams that supply the Integrated Water Supply Scheme.

The current streamflow amount for May 2019 to April 2020 (2019-2020 water year) is 44.1 GL (Updated on 26/3/2020)

The current streamflow amount is estimated until validated.

Stirling and Samson Brook Dams are included within this data.