South East Queensland
11.3 Entitled extraction of non–allocated groundwater to urban water system

Supporting information

The volumetric value for the line item at the end of the 2011–12 year was 149 ML.

This line item consists of diversions from groundwater based on unsupplemented entitlements held by urban utilities and the SEQ Water Grid Manager (merged with seqwater since July 2013). The table below shows the breakdown of groundwater extracted for the South East Queensland water grid 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
Water treatment plant

SEQ water grid connection

Volume 

(ML)

Algester Road Yes

0

Chandler  Yes

0

Dayboro No

136

Forest Lake
Yes

0

Linville No

13

Runcorn Yes

0

Sunnybank Yes

0

Total SEQ region

149

Due to the 2011–12 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 2011–12 year, reliance upon localised groundwater for urban supply within the SEQ region was reduced.

Quantification approach

Data source

Seqwater WaterHub database, this information was previously provided by DERM but commencing with the 2012 Account, it has been provided by Seqwater.

Provided by

Department of Energy and Water Supply (DEWS).

Method

The volume of groundwater extracted for water supply in the 2011–12 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 2012 definition of the 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%.

Comparative year

This line item corresponds to line item '11.3 Non-allocated extraction of groundwater' reported in the 2011 Account.