Christchurch Wastewater Treatment Plant update

Monday 25 August

Clarifier trial underway

The Christchurch Wastewater Treatment Plant is operating well and has adjusted to the winter conditions.

Our teams have been busy working in the background on a number of projects and have now started trialing the installation of walls that will make it possible to isolate the clarifiers. If the trial proves successful, full cutoff walls will be installed starting in late September.

These cutoff walls are a key preparatory step for critical repair works scheduled to begin in December/January. Once installed, they will enable faster and more efficient dewatering, helping to streamline the upcoming works.

We don’t expect the trial will impact operations at the plant over the next couple of weeks. 

Hydrogen sulphide monitors being tested 

We’ve collected all odour monitors from the community and around the plant and sent them off for routine calibration. With the ponds in stable winter mode and odour levels at their seasonal low, this is the most sensible time of year to complete the work.

Although this means we won’t have hydrogen sulphide data for the next few weeks, we expect to have the odour monitors back up and running in about three weeks.

Updating the community board on the Activated Sludge Plant 

On Thursday 28 August, the Waitai Coastal-Burwood-Linwood Community Board will receive an update from staff on the Activated Sludge Plant (ASP) Project. The update will include information about the latest progress and what's happening next. 

The information session is open to the public and will be held at the Community Boardroom in New Brighton located on the corner of Union and Beresford streets. The meeting will begin at 3.30pm*. The meeting will also be livestreamed via the Board's YouTube channel. 

*Please note there are multiple items on the agenda and we are unable to provide exact timing. 

Stay updated

We want everyone to be able to stay updated on what's happening at the Christchurch Wastewater Treatment Plant, and we regularly post new information on ccc.govt.nz/wastewaterfire 

You're welcome to send this update to your networks. If you know someone in the community who doesn’t have email or internet access, please print this newsletter off and pass it to them.

If you know of anyone who would like to receive this e-newsletter they can subscribe online. 

If you have any questions, or would like further information on the project, please call us on 03 941 8999 or 0800 800 169 or email wastewater@ccc.govt.nz  

Thanks for your patience and understanding. We’ll be in touch again soon.