Until the outcome of the 2025 federal election, the Australian Government is operating under caretaker conventions

Perth
18.12 Entitled extraction of allocated groundwater to urban water system

Supporting information

This line item volume (139,622 ML) represents the total groundwater extracted for urban water supply in the Perth region during the 2012–13 year.

Total volume of water extracted from each groundwater source for the urban water system during the 2012–13 year is given in the following table.

 

Volume of groundwater extracted from each groundwater source for the urban water system during the 2012–13 year

Groundwater source

Water extracted (ML)

Bore field

 

Gwelup

12,676

Jandakot

10,400

Lexia

2,866

Mirrabooka

17,648

Neerabup

 25,496

Wanneroo

 34,622

Yanchep/Two rocks

 1,214

Other

 

artesian bores

 34,700

Total

139,622

 

Groundwater made up 43% of the inflows to the urban water supply system during the 2012–13 year; last year the contribution of groundwater was 157,789 ML (approximately 50% of the urban water supply).

Quantification approach

Data source

Provided by

Water Corporation.

Method

Inflow of groundwater into the urban water system is the total volume of groundwater extracted from the groundwater sources (bore fields) within the Perth region. Total water extracted is based on measured data collected at each source site using a cumulative water meter.

Assumptions, limitations, caveats and approximations

Nil.

Uncertainty information

Expected error for water meters is +/– 5%.

The Department of Water requires that all water meters, when tested under in situ conditions, must be within 5% accuracy across the full flow rate range (Department of Water 2009c).