The volume recognised in the water accounting statements (8,063 ML) represents the volume of treated wastewater discharge to rivers and streams.
The breakdown of discharge to surface water from each wastewater treatment plant is shown below.
| Utility |
Discharge location | Volume (ML) |
|---|---|---|
| Yarra Valley Water | Brushy Creek Local Treatment Plant (LTP) to Brushy Creek |
3,302 |
| Craigieburn LTP to Merri Creek |
265 |
|
| Healesville LTP to Yarra River |
231 |
|
| Upper Yarra LTP to Yarra River |
673 |
|
| Lilydale LTP to Olinda Creek |
1,760 |
|
| Monbulk LTP to Sassafras Creek |
19 |
|
| Yarra Valley Water subtotal |
6,250 |
|
| South East Water | Pakenham Sewage Treatment Plant (STP) to Deep Creek |
792 |
| Koo Wee Rup STP to Yallock Creek |
0 |
|
| South East Water subtotal |
792 |
|
| Western Water | Sunbury Wastewater Treatment Plant (WWTP) to Jacksons Creek at Sunbury |
806 |
| Gisborne WWTP to Jacksons Creek at Gisborne |
215 |
|
| Western Water subtotal |
1,021 |
|
| Total |
8,063 |
|
Yarra Valley Water Local Treatment Plant: sewer flows and invoices database.
South East Water Sewage Treatment Plant: sewer flows spreadsheet.
Western Water: plant data.
Yarra Valley Water, South East Water and Western Water.
The volume of wastewater discharge to surface water was metered daily at Yarra Valley Water, South East Water and Western Water treatment plants.
Derived from measured data. Estimated uncertainty is +/–5%.
The uncertainty values refer to the Essential Services Commission’s standard confidence grades, as detailed in its June 2005 guideline for Approving, Conducting and Reporting Audits for Victorian Water Businesses (ESC 2005).
Refer to Summary Audit Report – Regulatory Audit of AGL Energy Limited, October 2010 (ESC 2010) prepared individually for Yarra Valley Water and South East Water.
Nil.