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Canberra: Statement of Changes in Water Assets and Water Liabilities

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

  • The volume of water in the Canberra region's storages decreased by 18 GL in 2024–25.
  • This decrease represents the change in water volume in the region's surface water storages.

Schematic representation of the water flows associated with the Canberra region's water stores, as well as the change to the region's water storage during the current reporting period.

The Statement of Changes in Water Assets and Water Liabilities provides a detailed breakdown of the actual water flows associated with the Canberra region's water stores over the past six water accounting periods ending 30 June, as well as the changes in water assets and water liabilities that occurred during each reporting period.

To view the Statement of Changes in 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 inflows
Surface water inflows 466,706807,4791,647,8482,127,6401,129,253250,877
Precipitation on storages12,14815,87523,27825,59722,5399,178
Precipitation on rivers4,0517,18015,21016,19612,5082,835
Flood return002,8964,0391,1440
Inflow from outside the region135,622310,968707,2681,205,748463,06347,935
Runoff278,323435,274855,015832,245589,704156,913
Treated wastewater discharge from urban water system*36,54638,15444,16743,77040,27734,000
Urban water return*162814451816
 
Groundwater inflows 53,05566,56492,42799,46567,52137,551
Recharge from surface water*50,23363,15788,77696,65464,76634,249
Leakage from urban water system*2,8223,4073,6512,8112,7553,302
 
Urban water system inflows93,63492,98196,79795,27197,40894,593
Diversion of surface water*54,26251,39047,76845,39049,31855,383
Wastewater collected39,37241,59149,02949,88148,09039,210
 
Total water inflows613,395967,0241,837,0722,322,3761,294,182383,021
Water outflows
Surface water outflows 448,996831,1572,164,5422,961,5931,395,351284,111
Evaporation from storages25,82325,97824,83423,85324,57921,506
Evaporation from rivers4,6766,95010,05512,6226,9912,738
Outflow to outside region310,490678,0711,926,3922,706,2291,226,577166,956
Overbank flow8093,29864,88175,56821,6920
Recharge to groundwater*50,23363,15788,77696,65464,76634,249
Allocated diversion to individual users2,0751,8181,3417829332,784
Diversion to the urban system*54,26251,39047,76845,39049,31855,383
Diversion of statutory rights628495495495495495
 
Groundwater outflows 1,3321,0738877539831,499
Allocated extraction to individual users8986394533195491,064
Extraction of statutory rights434434434434434435
 
Urban water system outflows93,46996,50394,99690,00590,58889,808
Leakage to groundwater*2,8223,4073,6512,8112,7553,302
Other losses8359058328461,1441,106
Other wastewater losses------
Return to surface water*162814451816
Supply of drinking water to urban customers50,97451,57143,44742,29646,06151,309
Supply of recycled water to urban customers2,2762,4382,88523733372
Treated wastewater discharge to landscape-----3
Treated wastewater discharge to surface water*36,54638,15444,16743,77040,27734,000
Total water outflows543,797928,7332,260,4253,052,3511,486,922375,418
 
Unaccounted-for difference(87,523)(43,649)419,105726,374326,284(11,610)
 
 
Change in water storage      
Change in surface water storage(18,355)(5,358)(4,248)(3,601)133,544(4,007)
Change in groundwater storage000000
Change in urban water storage43000000
Total change in water storage(17,925)(5,358)(4,248)(3,601)133,544(4,007)
 
Closing water storage301,210319,135324,493328,741332,342198,798
 
 
Change in water assets claims
Urban water supply000000
Urban water claims on surface water*000000
Total change in water assets claims000000
 
Change in water liability
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 change in water liability000000
Net change in water assets(17,925)(5,358)(4,248)(3,601)133,544(4,007)

* between-store flows

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