9.9 Discharge from urban water system

Supporting Information

The volume reported (2,425 ML) represents discharge from several wastewater treatment plants (WWTPs) operated by SA Water into rivers in the Adelaide region. The breakdown of WWTP discharge is presented in the following table. 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.

Wastewater discharge to surface water in the 2010–11 year
Wastewater treatment plant Surface water discharge point Discharge volume (ML)
Angaston North Para River 122
Bird-in-Hand Dawesely Creek – Onkaparinga Catchment 316
Hahndorf Hahndorf Creek – Onkaparinga Catchment 356
Heathfield Sturt River 749
Victor Harbor Hindmarsh Reservoir 32
Inman River 850
Total 2,425

Quantification Approach

Data Source

SA Water: waste water treatment plant (WWTP) records.

Provided by

SA Water.


The metered discharge of wastewater to surface water during the 2010–11 year from these WWTPs was supplied from WWTP records held by SA Water. These metered flows were manually read and recorded by plant operators.

Assumptions, Limitations, Caveats and Approximations

  • Treated effluent from the Victor Harbor WWTP was discharged to Hindmarsh Reservoir for summer storage and then released to Inman River in winter months.
  • The line item does not include any discharge from community waste management systems that were managed by local councils.

Uncertainty Information

The uncertainty estimate was not quantified.

Comparative year

This line item corresponds to 20.4.1 Discharge of urban wastewater to connected surface water reported in the 2010 Account. The volume reported in the 2010 Account did not change. The comparative year volume is 2,097 ML.