Wellington pipe crisis: $25m council boost but no sign of work on ‘high risk’ pipe to Moa Point
Thursday, 5 March 2026
Wellington City councillors approved a $25 million funding boost for pipes, with repairs on one crucial “high risk” pipe the top priority but a year later, the repairs have not begun.
Wellington Water, which claims repeated past pleas for funding the crucial work were rebuffed, gave the Wellington City Council a list of “uncommitted projects” with three funding options in February 2025.
The council voted for a $25m Wellington Water funding boost, which was the costliest of the three options before it.
Highest priority on that list was the airport wastewater interceptor which was “in poor condition and at risk of structural failure”, a councillor briefing said.
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“This funding was to provide for the ability to divert flows in the event of a failure occurring. Considered to be high risk.”
The interceptor is understood to carry all of Wellington’s wastewater to the Moa Point treatment plant. The plant had a mystery failure one month ago with millions of litres of untreated wastewater being discharged off the south coast as a result since. Wellington Water said the interceptor’s state played no part in the February 4 disaster.
An emailed statement from Wellington Water said it warned the council in 2022 of the “very poor” condition of the interceptor then in 2023 said it would cost $91.2m to fix. But it only ever got $5m ‒ spread over three years ‒ and that was last year.
It had started preliminary work, such as CCTV and laser scanning, with physical work starting next summer.
Current city councillor Laurie Foon and former city councillor Sarah Free, now a regional councillor, said they had been trying since mid-February to find out if the interceptor work was ever done but had no answers.
Foon this week said it was “not good” physical work had not started as this was seen as a high priority a year ago.
Council Planning and Finance Committee chairperson Diane Calvert said earlier Wellington Water funding requests, dating back to 2021, were not greeted with the same “enthusiasm” as they were by 2025.
She said she had called for more water spending since a 2020 mayoral taskforce into water infrastructure but was a minority voice until then-Local Government Minister Simeon Brown summonsed then-mayor Tory Whanau to a please-explain at Parliament as Wellington faced a major water shortage in early 2024.
Wellington Water sent senior council staff a memo which included a warning in early February 2025 – shortly before the funding boost: “Based on current approved funding levels, there is growing risks of failure of critical components at the wastewater treatment plants which may result in non-compliance …
“Councils are not providing the level of funding needed to allow us to manage their [wastewater] plants at an optimal level.”
At least two years before the 2025 funding boost, engineering firm Stantec posted online about a separate urgent project it did to fix the “Moa Point interceptor”.
“When the Moa Point wastewater treatment plant’s interceptor, a critical sewer line, was at risk of immediate collapse, untreated wastewater threatened Wellington’s south coast,” the company web page says.