South East Queensland
19.4 Delivery to urban water system users

Supporting Information

This line item consists of all potable, non-potable and recycled water delivered to consumers within the South East Queensland (SEQ) region by the urban water supply system and the recycled water supply system. This includes residential, commercial, industrial, municipal and other consumers. It includes both consumers supplied by urban utilities as part of the SEQ Water Grid and also consumers supplied off-grid.

Potable, non-potable and recycled water delivered to consumers
Type of water Water usage Urban utility, SEQ Water Grid or recycled water supply scheme Volume (ML)
Potable Residential SEQ Water Grid       131,117
Off-grid           5,220
Commercial, industrial and municipal SEQ Water Grid         53,229
Off-grid           2,119
Other including agriculture SEQ Water Grid           2,993
Off-grid             119
Non-potable Residential               –
Commercial, industrial and municipal                  –
Agriculture                  –
Recycled Residential Allconnex Water             202
Queensland Urban Utilities                0
Unitywater               31
Commercial, industrial and municipal Allconnex Water           9,361
Queensland Urban Utilities           5,264
Unitywater           1,576
Western Corridor Recycled Water Scheme (Swanbank)           4,472
Agriculture Allconnex Water             673
Queensland Urban Utilities                –
Unitywater                –
Total SEQ region         216,376
Notes:
  1. Where data were not available this has been indicated with (–).

Quantification Approach

Data Source

Queensland Water Commission (QWC) WaterHub Database potable consumption records. Qldwater Statewide Water Information Management (SWIM) system indicator WA20 (residential recycled water use), WA21 (commercial, industrial and municipal recycled water use) and WA22 (agricultural use) for Queensland Urban Utilities and Unitywater recycled water data. Allconnex Water database of recycled water data. SEQ Water Grid Manager WaterHub Database (meter M-0910MW).

Provided by

Bureau of Meteorology.

Method

Potable water consumption

QWC provided residential, commercial/industrial/municipal and other metered potable water consumption data for the SEQ Water Grid. Off-grid consumption was assumed to be equal to the off-grid diversions provided in line item 11.2 Non-allocated diversion of surface water. The off-grid consumption was divided into the land use categories using the consumption percentage obtained from the SEQ Water Grid data.

Recycled water consumption

Qld SWIM system data were used to estimate residential, commercial/industrial/municipal and agricultural consumption data for Queensland Urban Utilities and Unitywater. Only consumption within the Caboolture, Pine Rivers and Redcliffe Council areas was included for Unitywater.

Allconnex Water provided recycled water consumption for the same land use categories.

SEQ Water Grid Manager provided the metered volume of recycled water provided to the Swanbank Power Station via the Western Corridor Recycled Water Scheme.

Assumptions, Limitations, Caveats and Approximations

Data on non-potable water consumption were not available. If non-potable water is provided by urban utilities to consumers, this volume would be minor in comparison to the potable water supplied.

Moreton Bay Regional Council incorporates the previous councils of Caboolture, Pine Rivers and Redcliffe. The council's boundary does not match the South East Queensland (SEQ) region boundary exactly and as such a slight overestimate of the recycled water consumption within the region may have occurred.

Uncertainty Information

The uncertainty estimate was not quantified.

Comparative year

This line item corresponds partly to line item 20.5.3 Other lumped recycled water discharge reported in the 2010 Account. In the 2010 Account, potable water use was not included within the water accounting statements, but was included within the urban water notes. A change of accounting framework in the 2011 Account has resulted in the inclusion of potable, non-potable and recycled water use within line item 19.4 Delivery to urban water system users.

The following table compares the value at 30 June 2010 reported in the 2011 Account with the corresponding value reported in the 2010 Account.

Comparative year information – line item 19.4 Delivery to urban water system users
2011 Account line item 2010 Account line item Component Volume reported in the 2010 Account
(ML)
Prior period error correction
(ML)
Volume difference due to scope change
(ML)
Restated volume reported in the 2011 Account
(ML)
Additional information
19.4 Delivery to urban water system users Line item 20.5.3 Other lumped recycled water discharge
6,594 0 0 6,594  No change
Urban water note Potable – residential 0 168,190 168,190 Volumes included in urban water note, not in the water accounting statements
Potable – commercial, industrial, municipal 0 42,204 42,204
Potable – other 0 5,705 5,705
Non-potable – residential 0 0
Non-potable – commercial, industrial, municipal 0 0 -–
Non-potable – other including agriculture 0 0
Total 6,594 0 216,099 222,693  
Notes:
  1. Where data were not available this has been indicated with (–).