This project will
Protect public health and the environment
Reflect customer and mana whenua priorities
Support sustainable economic growth
Project summary
This project is part of the major long-term infrastructure investment now being managed by IAWAI – Flowing Waters, the new water services company for Hamilton and Waikato communities. IAWAI will be fully operational from July 2026. Until then, Hamilton City and Waikato District Councils continue to deliver projects alongside IAWAI.
We’re proposing to install underground wastewater storage in Fairfield Park (off Heaphy Terrace). While construction is a few years away, we are currently working on the planning, design and formal designation of the site.
Once the project is complete and underground storage tanks are installed, most people won’t even realise the underground tanks are there. The site will be re-grassed and paths reinstated, with the only visible features being equipment such as a transformer and electrical cabinets, tank access hatches and a driveway for vehicle access, similar to what is seen at wastewater pump station sites around the city. The tanks are sealed and are designed to avoid odour issues.
The expected construction area of the site is here:
Fairfield Park Underground Storage Tanks 2025 A3 Map
Why Fairfield Park?
Underground wastewater storage requires a large footprint for construction and installation. Fairfield Park has been chosen because there is ample space for construction in this location and is likely to have the least impact to the wider community.
In addition, it provides easy connections into the city’s existing wastewater pipe network. It also means that no property acquisition is required.
Where we're at with progress
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Stage 1 - Planning
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Stage 2 - Approval
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Stage 3 - Underway
If you have any questions, please fill out the form below:
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Last updated 7 November 2025