Kingscote Wastewater Treatment Plant, Kangaroo Island, South Australia

Kingscote wastewater treatment plant is located on Kangaroo Island in South Australia, serving the town of Kingscote. The facility provides secondary treatment for a population of approximately 2,318 residents, with an annual discharge volume of about 600 megalitres. As a secondary treatment plant, it meets the standard required for municipal wastewater in Australia under the National Water Quality Management Strategy. The plant's coastal location means treated effluent is discharged into the marine environment, subject to state environmental protection regulations administered by the Environment Protection Authority (EPA) South Australia. The plant's discharge enters the waters surrounding Kangaroo Island, which is part of the Investigator Strait and ultimately the Southern Ocean. The island's coastal ecosystems support diverse marine life, including seagrass meadows and rocky reef communities, making careful management of nutrient loads important for local water quality.

The plant discharges into the coastal waters of Kangaroo Island, which flow into Investigator Strait and then the Southern Ocean. This marine environment supports ecologically significant habitats including seagrass beds and rocky reefs that provide nursery grounds for fish and habitat for marine invertebrates. The island's isolation contributes to unique biodiversity, and nutrient inputs from treated wastewater require careful management to maintain water quality in this sensitive coastal ecosystem.