Overview
Altona wastewater treatment plant serves approximately 236,000 people in Melbourne, Victoria, Australia. It is an operational facility located near the coast, discharging treated effluent into Port Phillip Bay.
The Altona wastewater treatment plant is a major municipal facility serving the western suburbs of Melbourne, Victoria, Australia. With a population served of around 236,000, it is classified as a large agglomeration under Australian regulatory frameworks. The plant is located in Altona Meadows, approximately 15 km southwest of Melbourne's central business district, and is part of the broader Melbourne Water network. As a large-scale plant, Altona is expected to provide at least secondary treatment under the Victorian Environment Protection Authority (EPA) guidelines, which align with national standards for wastewater management. The plant's designed capacity is 1.00 (likely in megaliters per day or similar unit), indicating it is sized to handle significant flows from residential and industrial sources in the catchment. The treated effluent from Altona is discharged into Port Phillip Bay, a large, semi-enclosed bay that opens to Bass Strait and the Southern Ocean. The bay supports diverse marine life, including seagrass beds, fish populations, and migratory birds. Discharge into this sensitive coastal environment requires strict nutrient and pathogen control to prevent eutrophication and protect recreational water quality. The plant's proximity to the coast (within 50 km) underscores the importance of advanced treatment to minimize environmental impact.
Environmental context
Altona's treated wastewater discharges into Port Phillip Bay, a large embayment connected to Bass Strait and the Southern Ocean. The bay is ecologically significant, supporting seagrass meadows, mangrove stands, and important fisheries. Nutrient loading from wastewater can contribute to algal blooms and oxygen depletion, so the plant's treatment performance is critical for maintaining water quality in this urbanized coastal ecosystem.
Frequently asked questions
The Altona wastewater treatment plant is located in Altona Meadows, a suburb of Melbourne, Victoria, Australia. Its address is Hakea Court, Altona Meadows, within the City of Hobsons Bay.
The treated effluent from the Altona plant is discharged into Port Phillip Bay, a large coastal bay that connects to Bass Strait and the Southern Ocean. This discharge point is within 50 km of the coast.
The Altona plant primarily protects the coastal waters of Port Phillip Bay rather than a specific river. By treating wastewater before discharge, it helps maintain water quality in the bay and its surrounding marine environment.
The plant operates under the Victorian Environment Protection Authority (EPA) regulations, which align with the National Water Quality Management Strategy. For a plant serving over 200,000 people, secondary treatment with nutrient removal is typically required to protect sensitive coastal waters.
For large agglomerations like Altona (serving ~236,000 people), Australian standards generally mandate secondary treatment with additional nutrient removal, especially for coastal discharges. This helps prevent eutrophication and protects marine ecosystems in Port Phillip Bay.
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