This line item refers to the treated wastewater discharged to infiltration lagoons.
The total volume of treated wastewater discharged into infiltration lagoons from each treatment plant during 2009-10 is given below.
|
Wastewater treatment plant |
Total outflow (ML) |
|---|---|
|
Perth city region |
|
|
Bullsbrook |
72 |
|
Mundaring |
42 |
|
Two Rocks |
6 |
|
Southwest region |
|
|
Caddadup |
423 |
|
Gordon Road (Mandurah) |
3,035 |
|
Halls Head |
1,030 |
|
Total discharge to infiltration lagoons |
4,608 |
Water Corporation: Operational Data Storage System.
Water Corporation.
There are 14 wastewater treatment plants within the Perth region, six of which discharge treated wastewater into infiltration lagoons. The volume of this water 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 each site.
This value is estimated to be in the range of +/- 5-10%.
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, and that there are no other losses.