Sydney: Key findings

For the water account period 1 July 2020–30 June 2021

  • Total annual rainfall was above average for the first time in five years.
  • Heavy rainfall in March 2021 resulted in major flooding across parts of the region.
  • Water taken for consumptive water use was 581 GL, around 3% less than last year.

Climate and water


Rainfall icon

1,236 mm

above the average of 888 mm


Streamflow icon

well above average

during March 2021


Storage icon

97% full


22% more than last year

Water use

Water sourced

Graph showing breakdown of water sources used in the Sydney region. A total of 581 GL of water was used in the region in 2020–21. Surface water made up 95% of total water sourced. Desalinated water made up 3% and groundwater 3% of the water sourced.

Water supplied

Graph showing breakdown of water users in the Sydney region. A total of 581 GL of water was supplied to users in 2020–21. 91% of total water supply was for the urban system and 9% was for individual users.

Water status


1,285 GL

total surface water and groundwater allocations

Water availability

11,621 GL

surface water available in 2020–21


67% more than average



in storage expected during the 2021–22 year