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Mahurangi oyster farmers will receive a final support payment from Watercare following the dry-weather wastewater overflow that impacted the Mahurangi Harbour last October.
It will bring the total support provided to farmers and the wider industry to $2.75 million, following independent loss assessments. The overflow resulted in the farms being shut down by the Ministry for Primary Industries during a critical part of their harvesting season.
Meanwhile, concerns about wastewater overflows in Warkworth have prompted calls for changes to how Auckland’s water network is managed, with the Parliamentary Commissioner for the Environment outlining a series of recommendations to improve oversight, transparency and long-term planning.
In a recent review, the commissioner rejected claims that Watercare had dramatically increased allowable overflow events or altered rainfall thresholds used to classify incidents. Instead, officials confirmed that a reported figure suggesting 200 allowable events was an error that had since been corrected, and that no formal changes to overflow definitions had been made.
However, the report identified that population growth had outpaced the capacity of ageing wastewater infrastructure in Warkworth, and while recent interventions had reduced the frequency and volume of overflows, a full resolution was unlikely until major upgrades were completed.
Several recommendations focussed on improving the Network Discharge Consent (NDC) framework, which governs wastewater management. Currently, investment priorities were largely based on how often overflows occurred, rather than the sensitivity of the receiving environment.
The report suggested this approach should be reconsidered, particularly in ecologically and economically significant areas like the Mahurangi estuary.
Other proposed changes included reclassifying local waterways to reflect their environmental and public health importance, strengthening environmental monitoring and reporting, and clarifying expectations between Auckland Council and Watercare to avoid delays in planning and compliance processes.
The report also highlighted a lack of transparency in how harvest area closures were determined, recommending that MPI make its decision-making criteria publicly available and provide clearer explanations when closures occur.
