Central Interceptor

A super-sized tunnel that will reduce wastewater overflows into central Auckland waterways
Central Interceptor crew member pulls on a pair of overalls

Construction of the Central Interceptor is underway

Over four and a half years we’re building the Central Interceptor tunnel to help clean up central Auckland's creeks and streams. The Central Interceptor (CI) will run underground from Grey Lynn to our Māngere Wastewater Treatment Plant. It will have several link sewers and shafts along the route for collecting and transferring wastewater into the tunnel.

In 2018, Watercare awarded Ghella Abergeldie Joint Venture the contract to build CI. Ghella is an Italian family company with more than 150 years of Italian and international tunnelling experience. Australian company, Abergeldie, has delivered complex underground construction projects across New Zealand over the past four decades.

Why we're building the Central Interceptor

Read about the benefits this super-sized wastewater tunnel will deliver for Auckland

Constructing the Central Interceptor

Find out more about our construction sites

Engaging with our communities

We want to be a good neighbour while our project is underway

Sustainability and environment

On the Central Interceptor project, sustainability is at the heart of all we do

Keep up with us on social

Read about project milestones on Facebook or LinkedIn

Find out more

Read the latest newsletters, media releases and consent documents associated with the project

Button that takes you to the main Watercare website