Pinjarra Wastewater Treatment Plant, Western Australia

Pinjarra wastewater treatment plant is located in the Shire of Murray, Western Australia, near the Pinjarra Refinery. The facility serves a population of 6,345 and has a designed capacity of 1.00 ML/day, indicating it is a small-scale treatment plant. The plant is operational and plays a key role in managing wastewater from the local industrial and residential areas. As a plant in Australia, it operates under the national regulatory framework, including the National Water Quality Management Strategy and state-level environmental protection regulations. For a plant of this size, secondary treatment is typically required to meet discharge standards, ensuring protection of receiving water bodies. The plant's treated effluent is discharged into the local watershed, which drains into the Murray River and eventually into the Peel-Harvey Estuary, a significant coastal ecosystem. The estuary supports diverse aquatic life and is an important migratory corridor for birds. Proper treatment helps maintain water quality in this sensitive environment.

The plant discharges into the Murray River system, which flows into the Peel-Harvey Estuary, a large coastal lagoon in Western Australia. This estuary is ecologically sensitive, supporting diverse aquatic life and migratory birds. The region's Mediterranean climate with seasonal rainfall influences flow patterns, making effective wastewater treatment crucial for maintaining estuarine health.