Perth
19.8 Other wastewater discharge
Supporting Information
This line item refers to the treated wastewater discharged to infiltration lagoons.
Total volume of treated wastewater discharged into infiltration lagoons from each treatment plant during the 2010–11 year is given in the following table.
Wastewater treatment plant |
Total outflow (ML) |
Perth city area |
|
Bullsbrook |
67 |
Mundaring |
42 |
Two Rocks |
5 |
Yanchep |
152 |
Southwest area |
|
Caddadup |
442 |
Gordon Road (Mandurah) |
2,982 |
Halls Head |
1,043 |
Other |
|
Binningup |
20 |
Boddington |
34 |
Total discharge to infiltration lagoons |
4,787 |
Quantification Approach
Data Source
Provided by
Method
The total volume of water discharged into infiltration lagoons is estimated by subtracting the volume of recycled wastewater from the total inflow of water into the treatment plant. Both inflow and recycled volume data are based on measured discharge data collected at the site.
Assumptions, Limitations, Caveats and Approximations
It is assumed that the volume of treated wastewater discharged into infiltration lagoons is simply the total inflow of wastewater into the wastewater treatment plant minus the volume of water recycled.
Uncertainty Information
This value is estimated to be in the range of +/– 5–10%.
Comparative year
The following table presents substantive changes in the line item reported in this 2011 Account with the corresponding line item in the 2010 Account.
2011 Account line item |
2010 Account line item |
2011 Account volume for the 2009–10 year (ML) |
2010 Account volume for the 2009–10 year (ML) |
Change from the 2010 Account to the 2011 Account |
19.8 Other wastewater discharge |
20.4.3 Other lumped wastewater discharge |
4,608 |
4,608 |
Change in line item name and number |