Wallerawang Wastewater Treatment Plant, New South Wales, Australia

Wallerawang wastewater treatment plant is an operational facility located in the Lithgow City Council area of New South Wales, Australia. It serves a population of around 4,835 residents, placing it in the small to medium agglomeration category. The plant is situated inland, away from coastal influences, and plays a role in managing wastewater for the local community. As a treatment plant in Australia, it operates under the regulatory framework of the New South Wales Environment Protection Authority (EPA), which sets discharge standards and monitoring requirements. The plant's treated effluent is discharged into the local watershed, which ultimately drains into the Macquarie River system and then into the Murray-Darling Basin, one of Australia's most significant river systems. This basin supports diverse aquatic ecosystems and is critical for agriculture and water supply in the region. The plant's operations help protect downstream water quality and ecological health.

The Wallerawang plant discharges into the local catchment that feeds the Macquarie River, part of the vast Murray-Darling Basin. This basin is ecologically significant, supporting a range of native fish species and wetlands. The plant's location inland means its discharge influences freshwater ecosystems rather than coastal marine environments, with downstream effects on river health and biodiversity.