Environmental health report: review of the potential impacts of climate change on wastewater networks and treatment plants in Aotearoa New Zealand, and implications for public health
Please note: As of 1 July 2025, the New Zealand Institute for Public Health and Forensic Science (PHF Science) is the new name for the Institute of Environmental Science and Research (ESR). Research and reports published prior to this date may reference the organisation’s former name.
Summary
Well-functioning wastewater systems provide a critical service to society and play a key role in protecting environmental and public health. The objective of this report is to assess the potential impacts of climate change on wastewater treatment systems in the Aotearoa New Zealand context, with a specific focus on those impacts that may have implications for human health. It draws on key national and international documents, including up-to-date scientific literature, modelling and projections, and white and grey literature.