South East Queensland
19.7 Wastewater discharge outside of region

Supporting information

The volumetric value for the line item at the end of the 2011–12 year was 203,228 ML.

This line item consists of wastewater collection system and recycled water supply system discharges to the sea, estuaries and inlets outside of the South East Queensland (SEQ) region.

Wastewater collection system discharges

A number of wastewater treatment plants (WWTPs) discharge treated wastewater to the sea, estuaries and inlets outside of the SEQ region. Discharges to freshwater rivers, creeks and other surface water are reported in line item 19.5 Discharge from urban water discharge to surface water. A number of WWTPs that discharge to the Brisbane River are included in this line item, as the Brisbane River is estuarine through much of the urban Brisbane area.

Recycled water supply system discharges

Reverse osmosis brine concentrate and excess purified recycled water from the Gibson Island and Luggage Point advanced water treatment plants was discharged to the Brisbane River Estuary as part of the Western Corridor Recycled Water Scheme treatment process delivery process.

 

Wastewater and recycled water discharges outside of region
Discharge description

Volume

(ML)

Excess recycled water discharge
    468
Reverse osmosis concentrate discharge
      422
Treated wasterwater discharge
      202,338
Total SEQ region     203,228

Quantification approach

Data source

Queensland Department of Science, Information Technology, Innovation and Arts (DSITIA): licensed discharge data from the Point Source Database.

Seqwater provided Western Corridor Recycled Water Scheme dataset.

Provided by

Bureau of Meteorology.

Method

Wastewater collection system discharges

Annual Wastewater Treatment Plant (WWTP) discharge volumes obtained from DSITIA's Point Source Database. Each WWTP discharge point was then identified and WWTP that discharge to sea, inlets, and estuaries were selected and summed.

Recycled water supply system discharges

Annual advanced wastewater treatment plant discharge data for reverse osmosis concentrate and excess purified recycled water was obtained from Seqwater datasets for Gibson Island and Luggage Point advanced wastewater treatment plants.

 

Assumptions, limitations, caveats and approximations

Nil

Uncertainty information

The uncertainty was not quantified.