Northern Interceptor

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

Start–finish:  2015–2025 to 2035

Phase 1
Location: Hobsonville to Rosedale
Status: Consenting applications 2017–2020

We expect construction for Phase 1 to start in late 2017.

Future phases

2025–2030: Designation 
In the designation phase we identify where we intend to build infrastructure in the future.

What’s happening?

As the north-west of Auckland expands, so does the amount of wastewater we collect and treat. The Northern Interceptor is a new wastewater pipeline that will be built in stages, depending on how fast the population grows. 

Currently, wastewater from Massey North, Whenuapai, Hobsonville, Kumeu, Huapai and Riverhead flows to the Mangere Wastewater Treatment Plant.

The new pipe will redirect this flow to the nearby Rosedale Wastewater Treatment Plant in Albany.

Map showing the route of the Northern Interceptor.

What are the benefits?

  • The new pipeline will free up the Mangere treatment plant to cater for future growth.
  • The Rosedale Wastewater Treatment Plant has the capacity to manage the anticipated growth in the northern area up until 2070.

Any questions?

Please contact us:
Phone: (09) 442 2222 
Email: NIProject@water.co.nz

More information 

Newsletter (March 2016)
Requirement and designation process: a guide

Application documents

Requirement for designations
Assessment of effects on environment (AEE)
Appendix A
Appendix B
Appendix C
Appendix D
Appendix E
Appendix F
Appendix G
NI Vol 2 Technical Report A
NI Vol 2 Technical Report B
NI Vol 2 Technical Report C
NI Vol 2 Technical Report D
NI Vol 2 Technical Report E
NI Vol 2 Technical Report F
NI Vol 2 Technical Report F (supplement)
NI Vol 2 Technical Report G
NI Vol 2 Technical Report H
NI Vol 3 Drawing Set

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