9.10 Direct discharge by user

Supporting information

Delta Electricity discharged a total metered volume of 4,693 ML from Wallerawang Power Station to the Coxs River (upstream of Lake Lyell). Industrial wastewater from the power station was treated and discharged to the river.

Quantification approach

Data source

Delta Electricity 2011–12 Annual and Sustainability Report.

Provided by

Delta Electricity.


Ultrasonic flow meters were used to measure discharge from the power stations.

Assumptions, limitations, caveats and approximations

Discharge from power stations flows to the Coxs River and its tributaries.

Uncertainty information

The volume is based on measured data. Estimated uncertainty based on meter accuracy is +/– 2%. Meters are regularly calibrated.