11.6 Delivery of desalinated water to urban water system

Supporting Information

During the 2010–11 year, Sydney's desalination plant at Kurnell supplied 77,102 ML to the Sydney Water Corporation's (SWC) urban water system. In order to produce this volume, an estimated volume of 193,507 ML of sea water was drawn. The residual hypersaline concentrate (approximately 118,809 ML) was returned to the sea.

Quantification Approach

Data Source

Data are managed and maintained in an internal data management system by the SWC's Operations Division (Hydraulic Systems Services).

Provided by



The volume was derived from flow meter data on the outflow of desalinated water from the plant.

The flow meter data are continually monitored and recorded. Flow meters are maintained and calibrated according to meter manufacturers' specifications. The data are stored within a complex data management system. Adjustments are made to the data (if necessary) to correct any interruptions, errors and so on. Data have been extracted for the 2010–11 year from the data management system.

Assumptions, Limitations, Caveats and Approximations


Uncertainty Information

The volume is based on measured data. Estimated uncertainty based on meter accuracy is +/– 2%.

Comparative year

The following table compares the value for the 2009–10 year reported in this account with the corresponding value reported in the 2010 Account.


Comparative information from the 2010 Account for line item 9.11

2011 Account line item

2010 Account line item

Value reported in the 2010 Account (ML)

Value reported in the 2011 Account (ML)

Additional information

11.6 Delivery of desalinated water to urban water system

19.5.1 Delivery of desalinated water transferred in to urban water supply system



Change in line item name