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National Water Account 2017

Perth: Statement of Water Assets and Water Liabilities

The volume of water available in the Perth region at 30 June 2017 was 186,624 ML, compared with 146,741 ML at the start of the 2016–17 year. Water availability is represented by the net water assets, which are the volume of water in storages minus the water liabilities.



The Statement of Water Assets and Water Liabilities is provided in the table below. The statement presents the volume of water assets, and water liabilities at the start and end of the reporting year.



 2017 ML2016 ML
Water assets
Surface water297,520262,516
Unregulated river
Regulated river
Lakes and wetlands
Water table aquifer
Underlying aquifers
Total water assets297,520262,516
Water liabilities
Surface water liability8,5228,520
Allocation remaining: individual users8,5228,520
Groundwater liability102,374107,255
Allocation remaining: individual users102,374107,255
Total water liabilities110,896115,775
Opening net water assets146,741217,298
Change in net water assets39,883(70,557)
Closing net water assets186,624146,741