Sydney: Statement of Changes in Water Assets and Water Liabilities
for the year ended 30 June 2018
- Water availability decreased by about 24% during 2017–18. This follows a small decrease in water availability the previous year.
- The change in water available is represented by the change in net water assets.
The Statement of Changes in Water Assets and Water Liabilities is provided in the table below. The statement presents the changes in water assets and water liabilities that occurred during the year, including accrual transactions (e.g. allocations and forfeitures) and actual water flows, both natural and engineered.
Select comparative year
| 2018 ML | 2017 ML | 2016 ML | 2015 ML | 2014 ML | 2013 ML | |
|---|---|---|---|---|---|---|
| Water asset increases | ||||||
| Surface water increases | 1,429,569 | 4,663,025 | 5,132,439 | 5,490,254 | 2,152,593 | 5,187,641 |
| Precipitation | 80,591 | 173,155 | 139,962 | 155,848 | 91,668 | 134,391 |
| Runoff | 1,280,612 | 4,357,364 | 4,909,529 | 5,239,511 | 1,986,928 | 4,968,033 |
| Discharge: user | 81 | 828 | 0 | 8 | 2,485 | 4,860 |
| Claims: inter-region | 11,834 | 11,834 | 11,834 | 11,834 | 11,834 | 11,834 |
| Discharge: wastewater* | 55,217 | 77,924 | 71,114 | 83,053 | 59,678 | **68,523 |
| Flood return | 1,234 | 41,920 | – | – | – | – |
| Urban water system increases | 1,502,096 | 1,602,570 | 1,588,371 | **1,587,597 | **1,522,411 | **1,549,486 |
| Wastewater collected | 461,542 | 562,042 | 547,783 | 547,009 | 480,243 | 507,638 |
| Delivery: desalinated water | 0 | 0 | 0 | 0 | 0 | 0 |
| Claims: surface water* | 1,040,554 | 1,040,528 | 1,040,588 | 1,040,588 | 1,040,588 | 1,040,588 |
| Total water asset increases | 2,931,665 | 6,265,595 | 6,720,810 | 7,077,851 | 3,675,004 | 6,737,127 |
| Water liability decreases | ||||||
| Surface water liability decreases | 578,118 | 617,633 | 624,368 | 632,246 | 600,042 | 620,289 |
| Adjustment and forfeiture: individual users | 144,738 | 140,849 | 138,889 | 134,553 | 116,485 | 122,416 |
| Adjustment and forfeiture: urban water system* | 433,380 | 476,784 | 485,479 | 497,693 | 483,557 | 497,873 |
| Total water liability decreases | 578,118 | 617,633 | 624,368 | 632,246 | 600,042 | 620,289 |
| Water asset decreases | ||||||
| Surface water decreases | 1,440,830 | 4,383,810 | 4,226,406 | 4,611,953 | 1,930,582 | 4,411,383 |
| Evaporation | 179,549 | 189,060 | 150,271 | 166,963 | 168,947 | 141,766 |
| Outflow | 551,766 | 3,888,675 | 4,036,219 | 4,403,694 | 1,724,770 | 4,232,133 |
| Diversion: statutory rights | 32,257 | 32,257 | 32,530 | 32,530 | 32,530 | 32,529 |
| Leakage: groundwater | 663,398 | – | – | – | – | – |
| Claims: inter-region | 2,619 | 8,122 | 7,386 | 8,766 | 4,335 | 4,955 |
| Overbank flow | 11,241 | 265,696 | – | – | – | – |
| Urban water system decreases | 1,485,033 | 1,594,586 | 1,573,155 | **1,575,132 | **1,506,155 | **1,539,539 |
| Leakage: groundwater | 47,262 | 41,670 | 37,665 | 37,210 | 40,390 | 44,889 |
| Supply system delivery: urban users | 532,632 | 502,178 | 491,281 | 478,372 | 487,104 | 495,132 |
| Recycled water delivery: urban users | 14,394 | 13,596 | 17,502 | 20,515 | 22,018 | – |
| Wastewater and recycled water discharge: surface water* | 55,217 | 77,924 | 71,114 | 83,053 | 59,678 | – |
| Discharge: sea | 384,874 | 456,190 | 432,491 | 443,546 | 394,499 | 402,455 |
| Claims: surface water* | 433,380 | 476,784 | 485,479 | 497,693 | 483,557 | 497,873 |
| Other supply system decreases | 12,036 | 11,076 | 10,113 | 14,743 | 15,153 | 30,657 |
| Discharge: landscape | 0 | 94 | – | – | – | – |
| Other wastewater and recycled water system decreases | 5,238 | 15,074 | 27,510 | 0 | 3,756 | – |
| Total water asset decreases | 2,925,863 | 5,978,396 | 5,799,561 | 6,187,085 | 3,436,737 | 5,950,922 |
| Water liability increases | ||||||
| Surface water liability increases | 1,199,943 | 1,199,922 | 1,199,978 | 1,200,068 | 1,200,050 | 1,200,050 |
| Allocation: individual users | 159,389 | 159,394 | 159,390 | 159,480 | 159,462 | 159,462 |
| Allocation: urban water system* | 1,040,554 | 1,040,528 | 1,040,588 | 1,040,588 | 1,040,588 | 1,040,588 |
| Total water liability increases | 1,199,943 | 1,199,922 | 1,199,978 | 1,200,068 | 1,200,050 | 1,200,050 |
| Unaccounted-for difference | (30,138) | 164,564 | (189,050) | **(46,048) | **(88,573) | **(148,582) |
| Change in net water assets | ||||||
| Change in net surface water assets | (646,161) | (130,526) | 156,589 | **276,896 | (450,314) | 57,862 |
| Change in net urban water assets | 0 | 0 | 0 | 0 | 0 | 0 |
| Total change in net water assets | (646,161) | (130,526) | 156,589 | 276,896 | (450,314) | 57,862 |
* between-store flows and claims
** different to published volume in historical accounts (see Governance section for more information)