Indicator: Total electricity use by Sydney Water
We used 414.4 million kilowatt hours (kWh) of electricity during the year. We use a large amount of electricity to capture and treat wastewater. Water pumping stations and WWTPs used 80% of our electricity in 2011–12.
We have also reported the energy use of the desalination plant up to 1 June 2012, when the plant was sold. The Sydney Desalination Plant used 193.7 million kWh and offsets 100% of its electricity use with renewable energy.
Figure 17 – Total electricity used and generated 2002–12
Indicator: Net carbon dioxide equivalent emissions from the use of electricity, fuel and gas
Sydney Water’s operational emissions
We report our greenhouse gas emissions (that is, the net carbon dioxide equivalent emissions (CO2‑e)) by measuring our electricity, fuel and gas use and subtracting the renewable energy credits, NSW Greenhouse Gas Abatement Certificates (NGACs) and carbon offsets we surrender. A carbon offset absorbs and stores carbon to reduce the amount of greenhouse gases in the atmosphere.
In 2011–12, we reduced our emissions from electricity and fuel use by 24% from 2010–11 levels. We surrendered 289,969 NGACs, each representing the abatement of one tonne of CO2-e. We created the NGACs under the NSW Government’s Greenhouse Gas Abatement Scheme by:
producing low-emission electricity at our on-site generation facilities
helping residential customers reduce electricity use through our WaterFix Program.