21/05/2026
TOES Concerned About Future Waste Disposal Options for Auckland
The Onehunga Enhancement Society (TOES) is deeply concerned by reports that Auckland will soon need a replacement solution for the disposal of biosolids from the Māngere Wastewater Treatment Plant once the current Puketutu Island operation reaches capacity around 2035.
Suggestions that future options may include trucking waste long distances through Auckland suburbs to landfill sites, or constructing a large-scale incinerator near urban communities, raise significant environmental, health, traffic and quality-of-life concerns for residents of Onehunga and surrounding areas.
The prospect of thousands of truck movements transporting biosolids through local roads over coming decades is not something our communities should simply accept as inevitable. Increased heavy traffic brings noise, congestion, odour risks, road damage and the potential for accidental spills through densely populated neighbourhoods.
Likewise, TOES strongly opposes the possibility of incineration facilities operating near residential communities. Even with modern technology, incineration creates ongoing concerns regarding air pollution, emissions, ash disposal, public health impacts and significant operational costs. Once established, such facilities also create pressure to maintain waste streams simply to justify their operation.
TOES believes Auckland should instead seriously investigate a long-term deep-sea outfall solution extending into the Tasman Sea beyond the sensitive Manukau Harbour environment. This would involve combining treated liquid waste and processed biosolids into a controlled slurry discharged through a properly engineered offshore diffuser system in deep ocean conditions.
Deep-sea outfall systems are already used internationally and, when correctly designed, monitored and managed, can provide a lower overall environmental footprint than ongoing land disposal or incineration. While the initial infrastructure investment may be substantial, the long-term operational savings from avoiding continual trucking, landfill development and incinerator fuel costs could make such a system more economically sustainable over time.
Importantly, this option would also avoid creating new landfill sites that could potentially generate long-term contamination risks, leachate management issues and environmental liabilities for future generations.
The intent of the Waste Minimisation Act 2008 is to reduce environmental harm from waste generation and disposal. TOES believes this requires Auckland to carefully consider whether new landfill or incineration solutions are truly sustainable long-term options.
TOES also believes the principles of the Resource Management Act 1991 and Climate Change Response Act 2002 should guide future decision-making. These Acts place emphasis on sustainable environmental management, reducing adverse environmental effects, and considering the long-term wellbeing of future generations.
Rather than selecting the cheapest short-term solution, Auckland must invest in infrastructure that minimises long-term environmental damage, protects public health, and aligns with the aspirations of New Zealand’s environmental legislation for a more sustainable future.
For more see article https://www.newstalkzb.co.nz/news/auckland/puketutu-island-to-close-watercare-eyes-new-landfill-or-incinerator-for-auckland-s-waste/
Debbie Burrows Greg Fleming MP Maungakiekie-Tāmaki Local Board Mayor Wayne Brown Jon Turner Nicola Grigg MP Stop Polluting the Manukau Harbour Society Simon Watts MP for North Shore Mangere Bridge City Vision Puketāpapa
Aucklanders are being asked to have an awkward but necessary conversation about a new landfill or incinerator to take care of their “business”.