Porirua wastewater improvement project

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We are seeking community feedback on a planned programme of work to upgrade the wastewater system that serves Porirua and northern Wellington city suburbs, to improve the health of Porirua Harbour. 

Bridge Inlet Junction 081126 005

Improving wastewater, to improve the health of Porirua Harbour

We are about to start a programme of work to upgrade the wastewater system that serves Porirua and northern Wellington city suburbs, to improve the health of Porirua Harbour.

And we are seeking feedback on the programme and how we propose to approach it.

Firstly, the discharge consents for the Porirua wastewater treatment plant expire in 2020 and need to be renewed. That work will involve some capacity and equipment upgrades.

But, more importantly, we need to address issues with the catchment’s ageing wastewater network of pipes and pumping stations.

Overflows of wastewater during heavy rainfall as well as dry weather leakages are contributing to poor water quality in the harbour and streams. They are not consented and need to be as part of managing and reducing them.

That is why we are proposing to prioritise improvements to the wastewater network over the treatment plant, to reduce overflows and leaks and help improve the health of the harbour and coastal environment.

Wellington Water has worked collaboratively with Porirua City Council, Ngāti Toa, Greater Wellington Regional Council, Wellington City Council, the Whaitua Committee, Regional Public Health and other stakeholders in developing the proposed wastewater improvement programme.

It supports the Porirua community and council’s ambition is to improve the health of the harbour, a unique and precious estuarine environment. The harbour is also taonga for Ngāti Toa Rangātira.

Improvements to the network will also help manage the flow of wastewater to the treatment plant to prevent overflows that can happen in heavy rainfall. This work will support upgrades to the plant’s capacity and performance as part of the 2020 consent renewals.

Over the next few months we will be out be out talking to community groups and we encourage people to come forward with their views and ideas.

You can find more information about the proposed programme, including what upgrades we are considering for the wastewater network and treatment, in the information boards at the bottom of this page [pdf download].

Wellington Water expects to lodge an application with Greater Wellington Regional Council for the treatment plant discharge consents in late 2019, which would be followed by a submissions and hearing process.

Wellington Water plans to lodge consent applications for network overflows in 2020.

For more information about the wastewater network and the surrounding environment download our information boards. 

Please send any feedback on the Porirua Wastewater Improvement Project to PWI@wellingtonwater.co.nz

Key contacts:

If you have any questions about this project, please contact:

Paul Gardiner, Acting RMA Consents and Environment Principal Advisor
021 445 024

Kakaho 27 April 2017 15

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