Waikouaiti Wastewater Treatment Plant, Dunedin City, Otago, New Zealand

The Waikouaiti wastewater treatment plant is located in Dunedin City, Otago, New Zealand, serving a small community of approximately 1,443 people. The plant provides secondary treatment, a standard level for small agglomerations under New Zealand's regulatory framework, which requires treatment to protect receiving environments. Under New Zealand's Resource Management Act (RMA), wastewater treatment plants must operate under discharge permits issued by regional councils. For small coastal communities like Waikouaiti, secondary treatment is typical to reduce organic matter and suspended solids before discharge. The plant's discharge volume of 325.00 cubic meters per day reflects its small scale. The treated effluent is discharged into the local environment near the coast, ultimately reaching the Pacific Ocean. The area supports diverse marine life and is part of the Otago region's coastal ecosystem. Proper treatment helps protect water quality and aquatic habitats in the receiving waters.

The Waikouaiti plant discharges treated wastewater into the coastal waters of the Pacific Ocean near Dunedin City. The receiving environment includes nearshore marine habitats that support fish, invertebrates, and seabirds. The Otago coastline is ecologically sensitive, with areas of rocky reefs and sandy beaches that rely on good water quality. The plant's secondary treatment reduces pollutants to help maintain the health of these coastal ecosystems.