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Projects around Auckland

From treatment plants to major wastewater pipes, we’re expanding our infrastructure to cater for a fast-growing population.​

Construction under way on the Glen Eden wastewater storage tank.

We're investing in Auckland's future

As our r
egion expands, our focus is on using Aucklanders’ investment wisely and well. We are planning and delivering capital works that are: 

• enabling growth and development 

• replacing ageing infrastructure such as water and wastewater pipes, treatment plants, pump stations

• treating water to a high standard 

• ensuring a reliable water supply 

• maintaining the quality of our harbours and waterways. 

Major projects

Central Interceptor​

The Central Interceptor is a 13-kilometre, deep underground wastewater tunnel that will run between Western Springs and the existing Mangere Wastewater Treatment Plant.​

Hunua 4 watermain

This 30-kilometre pipeline through Manukau and Auckland cities will meet growing demand and increase resilience.

Northern Interceptor

Built in stages, this pipe will redirect wastewater from the north-west to the Rosedale Wastewater Treatment Plant.

North Harbour 2 watermain​

This asset will cater for the west and north, ensuring security of supply.

We’re building an extra facility to increase the treatment capacity of the plant.

Find a project

Many projects will improve our networks across the wider Auckland region, bringing benefits for residents who live in and beyond the project area.​  


Central Interceptor
Hunua 4 watermain
North Harbour 2 watermain
Northern Interceptor​​
Central Auckland

Franklin Road upgrades

​​North Auckland   

Fred Thomas Drive wastewater pump station

Wairau Road Wastewater upgrade

Warkworth-Snells-Algies wastewater services

East Coast Bays wastewater upgrade​

Army Bay Wastewater Treatment Plant outfall replacement​

Northcote wastewater pipeline upgrades​

Omaha Wastewater Treatment Plant​

South Auckland

Mangere – biological nutrient removal

Pukekohe East reservoirs

Pukekohe wastewater upgrades

South-west wastewater servicing 

East Auckland

Glendowie wastewater upgrade​

West Auckland
Glen Eden wastewater storage
Huia water treatment plant replacement

Have your say​

Complete our online feedback form​. 

More information

Asset management plan
This outlines how we will spend $11 billion upgrading and expanding our infrastructure over the next 20 years.

Water asset strategy

Wastewater asset strategy 

These strategies outline how we will stay ahead of population growth.​​​​​​​​​​​​​