Western isthmus water quality improvement
Te whakapiki ake i te kounga o te wai i te kūititanga ki te uru
The western isthmus water quality improvement programme is funded by an estimated $361.6m from the water quality targeted rate over 10 years.
The programme aims to significantly reduce wastewater overflows into the Waitematā Harbour and reduce stormwater entering the wastewater network.
It involves numerous major infrastructure improvements to the stormwater and wastewater network in collaboration with Watercare.
Other goals include:
- reduce risks to public health
- open both Meola Reef and Cox’s Beach from permanent health warning status
- reduce intermittent beach closures in this area over the next 10 years.
Current infrastructure work
Some of the major projects already underway:
- Construction on the Freemans Bay stormwater network separation project and Daldy Street outfall extension to improve water quality at Wynyard Quarter and Viaduct Basin
- St Mary’s Bay and Masefield Beach improvement project to reduce overflow frequency at these two beaches from over 100 times a year to less than six
- St Mary’s Bay and Herne Bay piping separation
- Work to separate the stormwater and wastewater networks at Waterview is due to start in 2020 and be completed by 2025. The design work is being led by our Healthy Waters team.
The current work complements Watercare's Central Interceptor programme – a 13km pipeline costing $1.1 billion expected to be completed in 2025.