National Water Account 2018

Perth: Key findings

For the water account period 1 July 2017–30 June 2018

  • Annual rainfall exceeded the average for the first time in six years. 
  • The wetter conditions contributed to increases in aquifer and surface water storage.
  • Desalination and groundwater continued to underpin urban water supply.

Climate and water

Rainfall

Rainfall icon

797 mm

slightly above the
average of 786 mm

Streamflow

Streamflow icon

about average

similar to last year

Storage

Storage icon

300 GL increase

arrowpointingup

in water storage from
last year

Water use

Water supplied

Graph showing breakdown of water users in the Perth region. A total of 776,225 ML of water was supplied to users in 2017–18. 54% of total water supply was for individual users; 37% was for the urban system and 9% was for the irrigation scheme.

776,225 ML

urban system

37%

irrigation scheme

9%

individual users

54%

Water status

Allocations

856,471 ML

total surface water and groundwater allocations

Water assets

299,648 ML

increase in net water assets during the year

 

Outlook

Increase

in water storage predicted during 2018–19