Second Valley Wastewater Treatment Plant, South Australia

Second Valley wastewater treatment plant is located in the small coastal town of Second Valley, South Australia, within the District Council of Yankalilla. The plant serves a population of 537, reflecting its role in a rural coastal community. It operates under Australian wastewater regulations, which require appropriate treatment to protect sensitive coastal environments. The plant provides secondary treatment, a standard level for small communities in Australia. Secondary treatment effectively removes organic matter and suspended solids, reducing environmental impact. The plant's discharge volume is approximately 139 megalitres per year, indicating its modest scale. The treated effluent is discharged into the local environment, which ultimately drains to the Southern Ocean. The area supports diverse marine life and is part of the broader Fleurieu Peninsula coastal ecosystem. Proper treatment helps maintain water quality in nearby coastal waters, protecting recreational and ecological values.

The plant discharges into the local catchment that flows to the Southern Ocean near Second Valley. This coastal region supports diverse marine habitats, including rocky reefs and seagrass meadows, which are sensitive to nutrient pollution. The area is also important for local fisheries and tourism, making effective wastewater treatment essential for preserving water quality and ecosystem health.