We are working on a programme to improve the wastewater system that serves Porirua and the northern suburbs of Wellington city. This will help improve the health of Te Awarua-o-Porirua and local streams and beaches, through investment in the network and upgrades to the treatment plant. This work will also help future-proof the system as our population grows.

Ko Te Awarua-o-Porirua he taonga tuku iho a Ngāti Toa Rangātira

Te Awarua-o-Porirua is an ancestral treasure of Ngāti Toa Rangātira

This work supports the Porirua community's ambition and the Porirua City Council’s strategic priority to improve the health of the harbour, a unique and precious estuarine environment.

What's been happening?

Work underway to improve the wastewater system in 2021 includes:

  • Increasing capacity at the treatment plant 
  • Planning for a central storage tank 
  • Identifying and repairing cross-connections and faults, to find out more about this check out Knowing Your Pipes
  • Planning the resource consent framework for reducing the volume and number of wastewater overflows over coming decades. Find out more here


The wastewater network is a joint venture between Porirua City Council (PCC) and Wellington City Council (WCC). Wellington Water Ltd (WWL) manages the network on behalf of both partners. 


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In 2019 we undertook public consultation and worked closely with a collaborative group to help inform our plans for the wastewater network. The collaborative group included representatives from PCC, Ngāti Toa, Greater Wellington Regional Council, WCC, the Te Awarua-o-Porirua Whaitua Committee and other community groups and stakeholders.