South East Queensland
9.10 Direct discharge by user

Supporting Information

This line item includes industrial and commercial businesses that discharge trade waste directly to surface water, rather than discharging their trade waste to the urban wastewater collection system. These businesses are licensed and reported to the Queensland Department of Environment and Resource Management (DERM).

Quantification Approach

Data Source

DERM, licensed discharge data stored and managed in the DERM Point Source Database.

Provided by

DERM.

Method

The Point Source Database contains both wastewater treatment plant discharges, and industrial and commercial discharges. The Point Source Database was queried for commercial and industrial discharge volumes in the 2010–11 year.

Data reported by South East Queensland (SEQ) discharge licence holders is filtered to differentiate between 'reuse' and 'discharge'. Discharges are then filtered to differentiate land, surface water and marine discharge. The discharges to surface water were selected and reported for this line item.

Assumptions, Limitations, Caveats and Approximations

The data in the Point Source Database have been measured and reported by discharge licence holders. DERM has accepted these measured discharge values in good faith.

Uncertainty Information

Derived from measured data. DERM reliability and accuracy rating is A2.

Comparative year

This line item corresponds to line item 13.7.3 Discharge after use of water diverted by industries reported in the 2010 Account.