Adelaide
9.9 Discharge from urban water system

Supporting information

The volume reported (4,620 ML) represents treated wastewater discharge from five wastewater treatment plants (WWTPs) to rivers in the Adelaide region and potable water discharge from  Swan Reach–Stockwell Pipeline to the South Para River. The following table details the volumes of  treated wastewater and potable water discharged to rivers during the 2012–13 year. 

Discharge to surface water in the Adelaide region during the 2012–13 year
Discharge type Discharge description Volume (ML)
Treated wastewater discharge Angaston WWTP discharge to North Para River 27
Bird-in-Hand WWTP discharge to Dawesely Creek–Onkaparinga Catchment 418
Hahndorf discharge to Hahndorf Creek–Onkaparinga Catchment 315
Heathfield discharge to Sturt River 631
Victor Harbor discharge to Hindmarsh Reservoir and Inman River 806
Subtotal 2,197
Potable water discharge Transfer from  Swan Reach–Stockwell Pipeline to the South Para River  2,423
Subtotal 2,423
Total 4,620

Treated wastewater from the Victor Harbor WWTP is temporarily stored in Hindmarsh Reservoir during summer and then released to the Inman River in the winter months.

Quantification approach

Potable water discharge to surface water

Data source

Supervisory Control and Data Acquisition (SCADA) database or manual field instrument readings, stored in the MetDaily file.

Provided by

SA Water.

Method

Metered potable water discharge (transfer) from Swan Reach–Stockwell Pipeline to the South Para River for the 2012–13 year was obtained from SA Water's SCADA database and/or MetDaily file.

Assumptions, limitations, caveats and approximations

Nil.

Uncertainty information

The uncertainty estimate was not quantified.

Treated wastewater discharge to surface water

Data source

WWTP records and Supervisory Control and Data Acquisition database (SCADA).

Provided by

SA Water.

Method

The metered discharge of wastewater to surface water was obtained from SA Water's WWTP records. Metered flows are either automatically logged by SCADA or manually read and recorded by plant operators.

Assumptions, limitations, caveats and approximations

The volume reported does not include any wastewater discharge from community waste management systems managed by local councils.

Uncertainty information

Uncertainty is +/– 10% based on meter calibrations.