Perth: Key findings

For the water account period 01 July 2022 – 30 June 2023

  • Total annual rainfall for the 2022-23 year was below average for the fifth consecutive year.
  • End-of-year storage decreased from 55% full on 30 June 2022 to 51% full on 30 June 2023.
  • Water taken for consumptive use was 614 GL, around 2% more than last year.

Climate and water

Rainfall

Rainfall icon

722 mm

9% below the average of 794 mm

Streamflow

Streamflow icon

below average

for mid spring to autumn

Storage

Storage icon

51% full

arrowpointingdown

4% less than last year

Water use from all water sources

Water sourced

Graph showing breakdown of water sources used in the Perth region. A total of 796 GL of water was used in the region in 2022–23. Groundwater made up about 66% of total water sourced. Desalinated water made up 12%, surface water 22%, and inter-region deliveries less than 1% of the water sourced.

Water supplied

Graph showing breakdown of water users in the Perth region. A total of 796 GL of water was supplied to users in 2022–23. 54% of total water supply was for individual users. 37% was for the urban system and 8% was for the irrigation scheme.

Water status of water resources

Water availability

2,016 GL

surface water available in 2022-23

arrowpointingdown

22% less than last year

Water accessible

837 GL

total surface water and groundwater accessible in 2022-23

arrowpointingup

slightly more than last year

Water taken

689 GL

total surface water and groundwater taken in 2022–23

arrowpointingup

8% more than last year