Ōpononi Wastewater Treatment Plant The Ōpononi wastewater treatment plant is located on Baker Road, Ōmāpere. This plant treats wastewater from the Ōpononi and Ōmāpere townships
Taipa Wastewater Treatment Plant The Taipa wastewater treatment plant (also known as the East Coast Bays wastewater treatment plant) is located off Oruru Road about 1 kilometer south-west of the Taipa township. Wastewater from about 1500 properties within Mangonui, Coopers Beach, Cable Bay and Taipa communities is treated here.