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Sydney: Statement of Water Assets and Water Liabilities

For the water account period 1 July 2024 to 30 June 2025

  • In the Sydney region, water availability remained stable during 2024–25 on the back of near-average rainfall.
  • Water availability is represented by the net water assets, which are the volume of water assets minus the water liabilities.

Schematic representation of the total volume of water assets and water liabilities in the Sydney region, as well as the closing net water assets at the end of the current reporting period.

The Statement of Water Assets and Water Liabilities provides a detailed breakdown of the volume of water assets and water liabilities in the Sydney region over the past six water accounting periods ending 30 June, as well as changes in net water assets between the start (1 July) and end (30 June) of each reporting period.

To view the Statement of Water Assets and Water Liabilities, scroll down to the table below.

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 2025 (ML)2024 (ML)2023 (ML)2022 (ML)2021 (ML)2020 (ML)
Water assets
Surface water 2,759,1472,765,0762,639,2712,724,2532,682,1782,276,782
Accessible storage2,645,3262,644,0232,527,3452,607,5802,560,9932,166,171
Dead storage108,430108,430108,430108,430108,430108,430
Rivers5,39112,6233,4968,24312,7552,181
 
Groundwater ------
Aquifers------
 
Urban water system 000000
Urban water claims on surface water*000000
 
Total water assets2,759,1472,765,0762,639,2712,724,2532,682,1782,276,782
Water liabilities
Surface water liability000000
Surface water allocation remaining: individual users000000
Surface water liability to urban water supply*000000
 
Groundwater liability000000
Groundwater allocation remaining: individual users000000
 
Total water liabilities000000
Net water assets
Net surface water assets2,759,1472,765,0762,639,2712,724,2532,682,1782,276,782
Opening net surface water assets2,765,0762,639,2712,724,2532,682,1782,276,7821,522,721
Change in net surface water assets(5,929)125,805(84,982)42,075405,396754,061
Closing net surface water assets2,759,1472,765,0762,639,2712,724,2532,682,1782,276,782
 
Net groundwater assets000000
Opening net groundwater assets000000
Change in net groundwater assets000000
Closing net groundwater assets000000
 
Net urban water system assets000000
Opening net urban water system assets000000
Change in net urban water system assets000000
Closing net urban water system assets000000
Total closing net water assets2,759,1472,765,0762,639,2712,724,2532,682,1782,276,782
Total change in net water assets(5,929)125,805(84,982)42,075405,396754,061

Note: quantification approaches used to derive each item volume are provided in the Methods