South East Queensland
3.2 Wastewater collection system

Supporting Information

This water asset exists in the South East Queensland (SEQ) region, but the volume could not be quantified in a way that is complete, neutral and free from material error due to the lack of both data and a suitable quantification approach.

Wastewater collection systems within the SEQ region are managed by the three urban retailers, Allconnex Water, Queensland Urban Utilities and Unity Water. Outside of major urban centres, wastewater collection systems may be managed by local councils. The majority of the urbanised part of the SEQ region will have centrally managed wastewater collection systems.

Although a volume was not able to be calculated for the wastewater collection systems, Qldwater were able to provide Statewide Water Information Management (SWIM) system data on the length of sewerage mains and number of sewage pumping stations managed by Queensland Urban Utilities (9,020 km and 334 pumping stations) and Unity Water (5,216 km and 782 pumping stations). These values are for the whole retailer network, and include pipes and pumping stations located outside of the 2011 Account SEQ region. Data werenot available from Allconnex Water for these water assets.

The volume of water held within wastewater collection systems was considered to be a substantial part of the urban water system storage volume but not its variation from year to year. Therefore, the omission of this information from the water accounting statements will have a material impact on the water balance of the urban water system store. Further information may be found in  the System's interactions with the region section of the Urban system note.

Comparative year

This line item corresponds to line item 5.2 Urban wastewater system reported in the 2010 Account.