Perth: Key findings

For the water account period 01 July 2021 – 30 June 2022

  • Total annual rainfall for the 2021-22 year was below-average for the fourth consecutive year.
  • End-of-year storage increased from 42% full on 30 June 2021 to 55% full on 30 June 2022.
  • Water taken for consumptive use was 689 GL, around 8% more than last year.

Climate and water

Rainfall

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782 mm

slightly below the average of 794 mm

Streamflow

Streamflow icon

below average

for most of the year

Storage

Storage icon

55% full

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13% more 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 807 GL of water was used in the region in 2021–22. Groundwater made up about 64% of total water sourced. Desalinated water made up 14%, surface water 21%, 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 807 GL of water was supplied to users in 2021–22. 54% of total water supply was for individual users. 38% was for the urban system and 8% was for the irrigation scheme.

Water status of water resources

Water availability

2,168 GL

surface water available in 2021-22

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88% more than last year

Water accessible

913 GL

total surface water and groundwater accessible in 2021-22

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4% more than last year

Water taken

689 GL

total surface water and groundwater taken in 2021–22

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8% more than last year