Medowie Wastewater Treatment Plant, New South Wales | Australia

Medowie wastewater treatment plant is an operational facility located in Richard Close, Medowie, within the Port Stephens Council area of New South Wales, Australia. It serves a population of approximately 10,780 people, classifying it as a medium-sized agglomeration under Australian wastewater management standards. As an Australian facility, it operates under the regulatory framework of the New South Wales Environment Protection Authority (EPA), which issues environment protection licenses that set discharge limits and monitoring requirements to protect water quality. The treated effluent from the plant is discharged into the local catchment, which ultimately drains into the Port Stephens estuary, a significant coastal water body that supports diverse aquatic life and recreational activities. The plant plays a key role in protecting the ecological health of the downstream environment.

The plant discharges into the local watershed that flows into the Port Stephens estuary, a large coastal lagoon system connected to the Tasman Sea. This estuary supports seagrass beds, mangroves, and important fish nursery habitats. The region's subtropical climate and proximity to the coast make the receiving waters sensitive to nutrient inputs, requiring effective treatment to maintain water quality and ecosystem health.