Waikanae treatment plant upgrade

A 30-month upgrade to increase earthquake resilience and to replace aging equipment at the Waikanae Water Treatment Plant started in February 2024 after the signing in November 2023 of the contract for a $22 million upgrade.

Our why

This upgrade is part of our commitment to provide safe, clean, reliable and resilient drinking water to homes and businesses. The Waikanae Water Treatment Plant provides drinking water to more than 40,000 people in Waikanae, Paraparaumu and Raumati.

The project is stage two of a planned three-staged upgrade of the Waikanae Water Treatment Plant. These works are part-funded by a $5.2 million grant from the government, and include:

• enabling works to move utilities such as telecommunications lines and stormwater pipes out of the way for excavations needed for the clarifier (completed in 2022)
• building a rapid mix tank (to mix coagulants and flocculants which bind particles in the water)
• building a new clarifier (a large tank where the bound particles bound together)
• planned renewals to replace pumps and dosing equipment which are getting towards the end of their useful life, and
• safety improvements which include constructing a new building to house chlorine tanks and dosing systems.

The works will also increase the seismic resilience of the water supply for Waikanae, Paraparaumu and Raumati. The two-and-a-half-year project follows enabling works completed in 2022, which included relocating a stormwater line and other utilities to make way for the new equipment.

Stages