North Head Sewage Treatment Plant

Sydney Water is implementing a $150 million improvement program at the STP to ensure reliable plant performance, ongoing protection of water quality and a safer work environment.

The improvements will also ensure the plant continues to perform in line with the environmental protection standards set by the Department of Environment and Climate Change through to 2023.

• Current improvements
• Environmental and traffic management
• Community information

Completed improvements

• A recycled water plant producing up to 1.5 million litres of recycled water a day for reuse at the plant
• A new biosolids management facility that uses a digestion process to reduce the amount of biosolids to less than 11 dry tonnes each day.
• A cogeneration power plant producing about 15% of the STP's annual energy needs
• An odour management facility
• Improvements to date (WMV - 6.8MB)

Overview

North Head Sewage Treatment Plant (STP) is located on the North Head Peninsula at the entrance to Sydney Harbour, near Manly. The 15.9 hectare site is bordered by Sydney Harbour National Park and the Tasman Sea.

North Head STP was commissioned in 1971 and is the second largest ocean STP in Sydney. It provides high rate primary treatment of sewage to a catchment of approximately 416 square kilometres that extends west to Seven Hills, south to Bankstown and north to Ku-ring-gai and Collaroy.

The plant serves a population of over one million people and treats about 300 million litres of flow a day. Treated effluent is discharged through a deepwater ocean outfall.