Perth: Key findings
For the water account period 1 July 2020–30 June 2021
- A relatively dry winter in 2021 resulted in below-average streamflows across the region.
- End-of-year storage was 42% full, similar to the previous year.
- Water taken for consumptive water use was 784 GL, almost the same as last year.
Climate and water
Rainfall

712 mm
below the average of 794 mm
Streamflow

below average
for most of the year
Storage

42% full

2% more than last year
Water use
Water sourced

Water supplied

Water status
Allocations
838 GL
total surface water and groundwater allocations
Water availability
1,286 GL
surface water available in 2020–21

33% less than average
Outlook
Increase
in storage expected during the 2021–22 year