Moa Point Wastewater Treatment Plant

At the Moa Point Treatment Plant, sewage travels through a series of screens, tanks, bioreactors, clarifiers and ultraviolet treatments before being discharged as liquid into Cook Strait.

It was granted new consents on 11 May 2009. These consents will continue for 25 years (expire 11 May 2034).

In general, the consents allow WCC:

• to continuously discharge up to 260,000 cubic meters per day of treated and disinfected wastewater into the coastal marine area via an existing submarine outfall,
• to discharge up to 4500 litres per second of mixed disinfected, treated and milli-screened wastewater to the coastal marine area during and/or immediately after heavy rainfall, when the quantity of wastewater arriving at the Moa Point Wastewater Treatment Plant exceeds 3000 litres per second,
• to occupy the foreshore and seabed of the coastal marine area with an existing submarine outfall pipeline,
• to continuously discharge contaminants (including odour) to air from the Moa Point Wastewater Treatment Plant ventilation system.