Ohakune water outage raises questions internal review can't answer, councillor says

A Ruapehu councillor is calling for an independent inquiry into how a pipeline break went undetected and left Ohakune without water for nearly three days.

First-term councillor John Chapman said the scale and duration of the outage raised questions that could not be answered by an internal Ruapehu District Council review.

Chapman had written to New Zealand's water services authority, Taumata Arowai, requesting an independent inquiry into the outage.

"When a pipeline break goes undetected, when reservoir levels fall to the point that taps run dry, and when restoration becomes a multi‑day emergency, it is reasonable for residents to ask whether the systems designed to protect essential services are fit for purpose."

Chapman said the community deserved to know how a major visitor destination ended up without water, why the reservoir fell to critically low levels and whether the outage could have been prevented.

He said the response effort by volunteers, agencies, council staff, contractors and Ngāti Rangi still deserved recognition.

The council's Civil Defence Controller has attributed the water outage to a combination of factors including a damaged raw water pipeline buried in dense bush, limited signs of a significant leak and problems removing trapped air from the pipeline after repairs.

Chapman said those operational explanations were important and helped the public understand the complexity of the problem, but also demonstrated the need for a wider examination of the water system.

"The community needs confidence that all aspects of this event will be examined," he said.

Those aspects included monitoring, contractor oversight, infrastructure resilience and council assurance processes.

After the town's water supply was safely restored on August 11, Ruapehu Mayor Weston Kirton committed to "a thorough review of the response" to the emergency, to identify lessons and opportunities for improvement.

Kirton said the review would be "about learning from what happened and ensuring we are better prepared for future events".

"We need to understand what worked well, where improvements can be made and what further safeguards may be practical."

But Chapman said an internal review would not provide sufficient independence or public assurance after an outage of such a scale.

"The people of Ohakune deserve a clear, factual account of what happened."

Chapman said an independent inquiry could also inform future infrastructure investment, including replacement of the raw water pipeline.

"This is not about assigning blame to those who worked long hours under difficult conditions. It is about ensuring accountability at the system level, strengthening resilience, and restoring public confidence.

"Ohakune is a major visitor destination with a small ratepayer base. It cannot afford repeated failures of critical infrastructure."

A transparent external investigation was the "most responsible way to learn from this event and ensure the community is better protected in the future", he said.