South East Queensland
18.9 Entitled extraction of non-allocated groundwater to urban water system

Supporting information

a. Supporting information

The volumetric value for the line item at the end of the 2012-13 year was 158 ML.

This line item consists of diversions from groundwater based on unsupplemented entitlements held by urban utilities and the Seqwater. The table below shows the breakdown of groundwater extracted for the South East Queensland (SEQ) water supply in each water resource plan (WRP) area within the SEQ region.

Volume of groundwater extracted by urban utilities within the South East Queensland region

Groundwater extracted by Seqwater within region

2013 Volume 

2012 Volume 

Groundwater source

Water treatment plant (WTP) 



Dayboro Well field Dayboro WTP (off-grid)



Linville Bores Linville WTP (on-grid)



Total SEQ region



Due to the 2012–13 year being wetter than normal years, and the urban allocation announcements (line item 21.2 Surface water allocation announcements – urban system) being 100% for the 2012–13 year, reliance upon localised groundwater for urban supply within the SEQ region was reduced.


Quantification approach

Data source

Seqwater: WaterHub database.

Provided by



The volume of groundwater extracted for water supply in the 2012–13 year was calculated by summing the water produced at all groundwater treatment plants that feed from a groundwater source within the SEQ region.

Assumptions, limitations, caveats and approximations

There may have been some loss of water during the treatment process; therefore, the volume of water extracted from the source will be an underestimate.  

Groundwater treatment plants in Bribie Island and Stradbroke Island were not considered as they are located outside the National Water Account SEQ region. The volume of water produced from these plants was quantified as an import to the SEQ region.


Uncertainty information

Derived from measured data. Estimated in the range +/– 20%.