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Water Projects

Lake Mangamahoe water intake improvements

Work began in March at Lake Mangamahoe to upgrade the water collection system that supplies the New Plymouth Water Treatment Plant.

The project will take six months to finish. As a result of the upgrades, the treatment plant will be supplied with better-quality water, which will make treatment more efficient. The improved intakes in the lake will also be more resilient, and the new fish screens (within the intakes) will provide greater protection for fish.

What we’re doing

  • The upper intake will be extended further into the lake and have a new fish screen installed.
  • The middle intake will be removed, and a new intake built and installed further down the lake (nearer the first car park).
  • crane and a barge will be required during the works.

Please note that due to the lack of available space around the middle intake’s site, the road around Lake Mangamahoe will be down to one lane for a few weeks in March and June.

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Page last updated: 04:31pm Wed 18 March 2026

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06 759 6060 enquiries@npdc.govt.nz
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