Quakers Hill Wastewater Treatment Plant, Sydney, New South Wales

Quakers Hill wastewater treatment plant is located in the suburb of Quakers Hill, part of the Greater Sydney region in New South Wales, Australia. The facility serves a population of approximately 178,328 residents in the north-western growth corridor of Sydney, an area that has experienced significant urban expansion. As an operational plant, it plays a key role in managing the region's wastewater. The plant operates under Australia's regulatory framework, which includes the National Water Quality Management Strategy and state-level environmental protection licenses issued by the NSW Environment Protection Authority. For a population of this scale, secondary treatment with nutrient removal is typically required to protect receiving waters, especially in sensitive catchments. The plant's treated effluent is discharged into the local waterway system, which ultimately drains into the Hawkesbury-Nepean River system and then into the Tasman Sea. This catchment supports diverse aquatic ecosystems and is important for recreational and agricultural uses downstream. The plant's performance is critical to maintaining water quality in this peri-urban environment.

The plant discharges into the Hawkesbury-Nepean River catchment, which flows into the Tasman Sea. This river system supports a variety of native fish species and provides habitat for waterbirds. The catchment is also used for irrigation and recreation, making nutrient and pathogen removal important for downstream water quality.