A review into the Moa Point point wastewater failure in Wellington has blamed it on longstanding weaknesses in governance, accountablity, and risk management - rather than a single decision.
The Moa Point plant failed during heavy rain in February this year, when an outlet pipe became blocked and wastewater then flooded and wrecked much of its equipment.
It meant millions of litres of untreated wastewater was discharged on the coast, with beaches closed to the public for weeks afterward.
A technical review of the failure said the the outlet pipe was blocked by an air pocket during high outflow. It came when one of its two UV disinfection units was offline for maintenance.
The Government ordered a Crown review into the disaster, to examine how both Wellington CIty Council and Wellington Water (now Tiaki Wai) managed the Moa Point plant.
The review released this morning said it was one of the most significant infrastructure incidents in Wellington in recent decades.
"Its consequences were immediate and far-reaching, affecting environmental outcomes, public confidence, essential service delivery, and the operation of a critical public asset," the review said.
It was said the failure was not an isolated event but rather the culmination of deeper, systemic weaknesses.
"While the governance model remains sound in principle, in practice it has drifted, creating gaps in stewardship, accountability, and risk management that have compounded over time."
The review has made six wider recommendations, aimed at creating clear accountability and understanding of risks when it comes to decision-making at the plant.
The mayor described the water as “refreshing and bracing” as he urged others to go for a dip. (Source: 1News)
One of the recommendations is for Wellington Water/ Tiaki Wai to commit to a time-bound remediation plan, upgrade plant capacity and operations, and strengthen their incident management.
Wellington Mayor Andrew Little said the report was thorough and his council would now work with Tiaki Wai to respond to the recommendations.
"The bottom line is Wellingtonians deserve transparency, and to have assurance about the response and recovery. That is why I asked the central government to commission a suitably independent report."
He said council would support Tiaki Wai to complete the previously-announced pathway to restore the plant.
Tiaki Wai board chair Will Peet said it accepted the recommendations.
“Without minimising what happened, this moment is an opportunity to learn from previous mistakes and build better, more resilient systems and infrastructure. Our repair and renewal work started immediately after the event and rapid progress is being made.
He said the establishment of Tiaki Wai - which took over the delivery of water services in the region from Wellington Water earlier this year - "goes some way to addressing many of the [report's recommendations]."
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