Updates for residents and businesses near the Christchurch Wastewater Treatment Plant site.

Contractor appointed for activated sludge reactor 

The main construction contract for the Christchurch Wastewater Treatment Plant's activated sludge reactor has now been awarded to HEB Construction, marking a major milestone for the upgrade.

We’re working closely with the contractor to get the site established as soon as possible, with construction expected to start early in the new year. 

This work follows the demolition of the fire-damaged trickling filters earlier this year, clearing the way for the new reactor. Construction is expected to take about three years, with commissioning targeted for 2028.

The new reactor will be a substantial structure, 67m x 67m and 7m high, housing a blower room to mix air with incoming wastewater. The design process has been accelerated by working closely with contractors and using 3D design technology. Once construction begins, our goal is to move quickly, with commissioning of the plant currently targeted for 2028.

Join us at a community meeting on 11 December

With a busy summer of work about to get underway at the Christchurch Wastewater Treatment Plant we've organised a community meeting for locals to come along and hear directly from Council staff and contractors.

6.15pm—7.15pm, Thursday 11 December 
He Waka Tapu, 161 Pages Road

At the meeting we'll give updates on: 

  • Activated Sludge Reactor construction - with construction scheduled to start in early 2026 we'll give you an overview of what the project will involve. The Council's project manager and HEB Construction staff will be available to talk about the project and answer your questions. 
  • Clarifier repairs - repairs are scheduled for March next year and important preparation works are happening now. The clarifiers play a critical role in the wastewater treatment process, ensuring that solids are separated from the wastewater that enters our oxidation pond system. The Council's project manager will be on-hand to talk about the project and answer any questions. 
  • Ongoing operations - operating the damaged treatment plant is complex, and at this time of year we take actions to try and manage midge numbers and odour. The plant's operations manager will be at the meeting to give an update and answer questions. 

There is no need to RSVP - just show up on the day. 

How to stay informed

If you’re a neighbouring resident or business, please email wastewater@ccc.govt.nz with "Neighbour Subscribe" in the subject line. We will send you updates as we receive confirmation of upcoming concrete pour dates.

This webpage will be regularly updated as information is confirmed.