St Marys Bay separation project
The wastewater tunnel will run underground from Grey Lynn to our Māngere Wastewater Treatment Plant. Once completed, it will help reduce wet weather overflows into central Auckland beaches and waterways.
A water quality improvement programme to reduce overflows and clean up local waterways.
Hūnua 4 watermain
This 31km pipeline through Manukau and Auckland will meet growing demand.
Grey Lynn Tunnel
The Grey Lynn Tunnel is designed to intercept and divert overflows from local networks in Grey Lynn and the Orakei main sewer to our wastewater plant in Māngere for treatment.