Alkimos Wastewater Treatment Plant, City of Wanneroo, Western Australia

Alkimos wastewater treatment plant is a municipal facility located in the City of Wanneroo, Western Australia, serving a population of around 49,385. The plant is situated in a growing coastal suburb north of Perth, part of the state's wastewater infrastructure managed by the Water Corporation of Western Australia. As an operational plant, it is subject to the Western Australian Environmental Protection Act and the Australian Guidelines for Water Recycling. For a population of this scale, secondary treatment with nutrient removal is typical, especially given the proximity to sensitive coastal environments. The plant's designed capacity is 1.00 (likely in megaliters per day or similar unit), indicating it is sized to handle current and near-future demand. The treated effluent from Alkimos is discharged into the local environment, ultimately reaching the Indian Ocean via the coastal drainage system. The region supports diverse marine ecosystems, including seagrass meadows and reef habitats, which are sensitive to nutrient inputs. The plant's operations are critical to protecting these coastal waters from pollution and maintaining water quality for recreational and ecological uses.

The plant discharges into the coastal waters of the Indian Ocean near Alkimos, Western Australia. The receiving environment includes nearshore marine habitats such as seagrass beds and limestone reefs, which support diverse fish and invertebrate communities. Nutrient and pathogen removal is essential to prevent algal blooms and protect public health in this popular recreational area. The plant's location within a rapidly urbanizing region underscores the importance of effective wastewater treatment to safeguard downstream marine ecosystems.