Canberra
10.6 Leakage from urban water system
Supporting information
This line item volume (2,906ML) represents the total leakage from the urban supply system to the groundwater system. These losses include leakage from pipes, service reservoirs and service connections prior to the customer water meters.
Agency | Volume (ML) |
ACTEW Water |
2,454 |
Queanbeyan City Council | 452 |
Total | 2,906 |
Quantification approach
a. ACTEW Water
Data source
Provided by
Method
The ACTEW Water's real losses were calculated in line with the Water Services Association of Australia (WSSA) National Performance Framework. The real losses from the distribution system is the difference between the system input volume (SIV) and the total of the billed water exported (supplied to Queanbeyan), billed metered consumption, billed unmetered consumption, unbilled metered consumption, unbilled unmetered consumption, unauthorised consumption and customer meter under-registration.
Assumptions, limitations, caveats and approximations
- Losses from the water distribution system store cannot be distinguished between leakage to groundwater and leakage to landscape, and therefore a combined estimate is provided.
- Background losses from the potable water supply system include losses from ongoing leakage, pipe bursts and other components.
Uncertainty information
The uncertainty estimate was not quantified.
b. Queanbeyan City Council
Data source
Provided by
Method
The 2011–12 leakage from Queanbeyan potable water supply system was calculated from the estimated leakage from water network. This is calculated by using the difference between what QCC purchases from ACTEW and what QCC sells to its customers.
Assumptions, limitations, caveats and approximations
- Losses from the water distribution system store cannot be distinguished between leakage to groundwater and leakage to landscape, and therefore a combined estimate is provided.
- Background losses from the potable water supply system include losses from ongoing leakage, pipe bursts and other components.
Uncertainty information
The uncertainty estimate was not quantified.