Treatment plant

Future-proofing the treatment plant

Work is underway on upgrading and increasing the capacity of the treatment plant, so it is fit for purpose for a growing population.

In 2021, new ultra-violet (UV) disinfection equipment is being installed at the treatment plant to increase the volume of wastewater that can be disinfected. UV light disinfection is the final stage in treating wastewater after solids and the vast majority of harmful bacteria have been removed. It destroys remaining bacteria and viruses before the fully treated liquid is discharged to the sea.

You can find updates on the work here 

The next step is hydraulic upgrade work, planned for the summer of 2021-22.

Submissions on resource consent now closed

In May/June 2021, the community had a chance to make submissions on the Porirua City Council's (PCC) application for a resource consent, as required under New Zealand law (Resource Management Act), to discharge treated wastewater.

The current consent for the Porirua wastewater treatment plant (WWTP) expired last year (2020) and needs to be replaced. Prior to the expiry of this consent, PCC applied to Greater Wellington Regional Council (GWRC) for a new consent (a coastal permit) to discharge treated wastewater from the Porirua WWTP to coastal waters off Rukutane Point. 

Wellington Water outlined the application and the resource consent and submission process at a public meeting in Titahi Bay on 9 June 2021. You can see the Wastewater Treatment Plan Community Presentation here. 

Submissions have now closed and we’re waiting for GWRC to set a hearing date