Drinking Water Treatment Plants Upgrades

  • Project typeInfrastructure

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Photo: Onemana Water Treatment Plant.

A Government inquiry was sparked by the 2016 Havelock North gastro outbreak, which was linked to four deaths, and called for a major overhaul of water supplies, including mandatory treatment. 

We're upgrading almost all our water treatment plants, essentially building new ones with state-of-the-art filtration and treatment systems, in our drinking water standards project - Tautiaki Wai Māori. 

The Onemana, Tairua, Pāuanui, Whitianga, Coromandel Town and Whangamatā (Beverley Hills, Wentworth Valley and Moana Anu Anu) plants have been completed.

The Hāhei plant is expected to be completed by June 2025 and the Matarangi plant should be finished by the end of 2025.

An additional water treatment plant will be built in the Puriri area and is expected to be completed in 2027/28. 

The plants are fitted with the latest technology and methodologies for treating our water including Evoca-supplied membrane units, new filtration, dosing and monitoring equipment.

All of these upgrades will ensure our drinking water quality complies with the current Drinking Water Quality Assurance Rules 2022.

The drinking water treatment plant at Thames was upgraded more recently than the other plants and is not due for an upgrade as part of this project.

Contact details

Infrastructure Team
customer.services@tcdc.govt.nz

Next Steps

  • Moana Point (Whangamatā) – has been completed and opened in August 2023.
  • Onemana – officially opened on 1 June 2023. 
  • Hahei - expected completion June 2025.
  • Matarangi – construction underway, expected completion end of 2025.
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