Christchurch City and Waimakariri District councils are working together on wastewater disposal solutions, as each organisation plans its own ocean outfall. They are sharing information about ocean current, wind, wave, seabed, and marine ecology.

People have asked why there shouldn’t be just one outfall serving both areas. The main reasons are the high cost of building pipelines and pumping stations to transfer wastewater from one area to the other and the different timeframes, dictated by the Resource Management Act, that the two councils are working to.