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January 2021This report describes a pilot study to validate methods and assess cost savings for the design of a large-scale replacement study of the 1998-2000 Quantitative Microbial Risk Assessment. Read more -
December 2020This report surveyed international frameworks, identified important lessons for outcome-based environmental management, and helps clarify what setting environmental limits and targets will require. Read more -
December 2020This report translates the planetary boundaries framework to show New Zealand’s global environmental connections and quantifies where our country sits in terms of operating within environmentally safe boundaries. Read more -
September 2020An evaluation report and compilation spreadsheet of available tools, databases and resources relating to the distribution of threatened freshwater species and their habitats in New Zealand. Read more -
August 2020This report by Energy Link considers 11 methodologies for modelling the electricity allocation factor. Read more -
August 2020This guidance document sets out recommended practice for the design of instream infrastructure to provide for fish passage and to set the foundation for the improvement of fish passage management in New Zealand. Read more -
August 2020The New Zealand Threat Classification System provides a tool for assigning a threat status to candidate taxa. Read more -
August 2020This report describes methods used to assess deposited sediment including the SAM2 method that is prescribed in Table 14 of Appendix 2B of the National Policy Statement for Freshwater Management 2020. Read more -
August 2020This report describes the method used to calculate the average score per metric (ASPM) indicator score. Read more -
August 2020This report describes a prototype for a New Zealand River Ecosystem Health Scorecard, conceived as a simple, easily interpretable and holistic communication tool for the state of the biophysical condition of rivers and streams in New Zealand. Read more -
May 2020This report estimates the potential impact of the National Policy Statement for Freshwater Management (2017) and the Essential Freshwater package on the dairy, beef and sheep farming sectors. Read more -
May 2020This document provides a high-level overview of the impact assessment for Action for healthy waterways including the objectives and scope, findings, parties involved, methodologies applied, and the limitations and constraints to the analysis. Read more -
May 2020This report assesses the costs of the Essential Freshwater Package relative to the existing National Policy Statement for Freshwater Management. Read more -
May 2020This memo sets out a technical review by NIWA of two reports relating to environmental impact assessment of Essential Freshwater policies. Read more -
May 2020This report presents research conducted by Lincoln University on the willingness to pay for the various attributes associated with New Zealand’s green premium. Read more -
May 2020This report summarises work to evaluate load reductions required to meet the new National Policy Statement for Freshwater Management's nutrient-related bottom lines. Read more -
May 2020This memo assesses whether councils would need to make changes to wastewater treatment in addition to those already identified in the Boffa Miskell report Cost estimates for upgrading wastewater treatment plants to meet objectives of the NPS freshwater. Read more -
May 2020This is the second of two Infometrics reports providing Māori economic impact analysis for the Essential Freshwater proposals. Read more -
May 2020This is the first of two Infometrics reports providing Māori economic impact analysis for the Essential Freshwater proposals. Read more -
May 2020This report uses a kaupapa Māori framework to assess the impacts of the 2019 freshwater proposals on Māori values relating to freshwater Read more -
May 2020This AgResearch report presents insights on the potential nature of social impacts emerging from freshwater policy changes based on past social impact assessments (SIAs). Read more -
May 2020A literature review of studies that jointly considered climate and freshwater policy in New Zealand. Read more -
May 2020This NIWA report summarises existing literature on the consequences of delaying reductions to nutrient inputs on rivers, estuaries and lakes. Read more -
May 2020This report builds on the report released by the Freshwater Science and Technical Advisory Group in June 2019. Read more -
May 2020This report identifies the expected benefits of the Essential Freshwater Package and examines whether they can be measured in monetary terms. Read more -
May 2020This Castalia report estimates the administrative costs imposed under the Action for healthy waterways package for New Zealand’s 16 regional councils. Read more -
May 2020This report by Perrin Ag estimates the on-farm economic impact of a selection of measures to mitigate the effect of farming on freshwater ecosystem health. Read more -
May 2020This report presents the modelled results of the impact of the National Policy Statement for Freshwater Management (2017) and two variants of the Essential Freshwater package on New Zealand’s economy in 2030 and 2050. Read more -
Further analyses of fine sediment attributes to support development of the NPS freshwater managementMay 2020These six technical reports detail analysis used to finalise the suspended and deposited sediment attributes for the National Policy Statement for Freshwater Management. Read more -
May 2020This report by the Freshwater Independent Advisory Panel makes a series of recommendations about the proposals outlined in the Action plan for healthy waterways consultation document. Read more -
April 2020In 2018, the Ministry asked Deloitte to consider the extent of water bottling in Aotearoa New Zealand NZ and the economic value of water bottling for water bottlers and communities. This report presents their findings. Read more -
April 2020This report by Cawthron collates and analyses regional council river and stream monitoring data, including measures of fine deposited sediment and habitat quality. Read more -
March 2020Phormidium (now called Microcoleus) is a cyanobacterium (toxic algae) that grows in some New Zealand rivers. It produces neurotoxins called anatoxins and ingestion of cyanobacteria mats has caused numerous dog deaths. Read more -
March 2020Phormidium (now called Microcoleus) is a cyanobacterium (toxic algae) that grows in some New Zealand rivers. Read more -
March 2020Phormidium (now called Microcoleus) is a cyanobacterium (toxic algae) that grows in some New Zealand rivers. Read more -
December 2019The Ministry commissioned this report to improve our understanding of how geospatial information can inform meaningful engagement with iwi/hapū. Read more -
November 2019This report by Honorary Professor Peter Skelton concerns the management and allocation of freshwater in the Otago region. It contains recommendations for the Minister for the Environment on improving freshwater management under the Resource Management Act 1991. Read more -
October 2019This NIWA consultant report provides analysis of state and trends in a number of water quality variables in urban rivers and streams in New Zealand. Read more -
September 2019This draft NIWA report provides the first attempt to develop bottom-line thresholds for suspended and deposited sediment based on ecological responses for New Zealand rivers and streams. Read more -
September 2019This report describes hydrological modelling that estimates the suspended sediment load reductions required to meet proposed suspended sediment attribute bottom lines. Read more -
September 2019This report provides a cost-benefit assessment of potential interventions to meet proposed suspended sediment attribute bottom lines. Read more -
September 2019This literature review assesses the primary sources of variability in sediment generation in an urban environment and the impact of urban development on sediment discharges in the short and long term. Read more -
September 2019This report builds upon the findings of the Sediment attributes and urban development (report 1) literature review - see link in Related publications below. Read more -
September 2019This report analyses water quality data to assess the effect of urban development on in-stream indicators of suspended fine sediment, primarily turbidity and total suspsended sediment. Read more -
September 2019This report describes modelling of several urban development scenarios and their variable effect on sediment yield during construction. Read more -
September 2019This report describes remote sensing imagery analysis that identifies areas of winter forage cropping and evaluates devegetation that results from winter grazing. Read more -
September 2019This report reviews New Zealand literature on the effects of environmental degradation of freshwater ecosystems on social, cultural, environmental, and economic outcomes in New Zealand. Read more -
September 2019This report provides a review of alternative, and potentially complementary, frameworks for the integrated assessment of the economic, environmental, and socio-cultural effects of environmental management. Read more -
September 2019This is the report of the Science and Technical Advisory Group (STAG), an advisory group to the Essential Freshwater programme. This report highlights a strong focus by the Science and Technical Advisory Group on the health of the environment and the waterbody. Its content and recommendations provide additional metrics for the national freshwater management framework to strengthen the relationship between this national direction and ecosystem health and functioning. Read more -
September 2019The report by the Freshwater Leaders Group notes that to improve water quality, major changes are needed to the way that we as a country protect and manage our land and water. Read more