Opononi Wastewater Treatment Plant, Kaikohe-Hokianga Community, Northland

The Opononi wastewater treatment plant is located in the Kaikohe-Hokianga Community in the Far North District of Northland, New Zealand. It serves a population of approximately 4,283 residents, making it a small-scale municipal facility. The plant is situated near the Hokianga Harbour, a significant coastal water body on the west coast of the North Island. As a New Zealand wastewater facility, the plant operates under the Resource Management Act (RMA) 1991, which governs discharge permits and environmental standards. For a plant serving a population of this size, typical treatment includes primary and secondary processes to meet local water quality guidelines. The plant's treated effluent likely discharges into the Hokianga Harbour, which flows into the Tasman Sea. This harbour is an ecologically important estuary supporting diverse aquatic life, including fish and bird species. The surrounding Northland region is known for its subtropical climate and sensitive coastal ecosystems, making proper wastewater management critical to protecting water quality and marine habitats.

The Opononi plant discharges into the Hokianga Harbour, a large estuary on the west coast of Northland, New Zealand. The harbour flows into the Tasman Sea, part of the South Pacific Ocean. This coastal environment supports diverse marine life, including fish, shellfish, and migratory birds. The region's subtropical climate and high rainfall can influence runoff and water quality, making effective wastewater treatment important for maintaining ecological balance in the harbour and downstream marine areas.