Watercare delays reopening of Onehunga water treatment plant to 2029
Saturday 6 December 2025 · 2 outlets · 2 reports · updated In this story Watercare
The Onehunga water treatment plant, which was closed three years ago due to the detection of substances linked to cancer and immune issues, will not reopen until 2029. Watercare is undertaking a $40m upgrade to the facility that will include ultraviolet disinfection and carbon filters.