Publication Search
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April 2004This report estimates dioxin emissions from New Zealand foundry operations that melt and process scrap metals and alloys. Volume one is the emissions estimate report. Read more -
April 2011This guideline has been developed through a partnership between the Ministry for the Environment, regional councils and unitary authorities to ensure consistency in the reporting on contaminated sites. Read more -
July 2001This publication provides background information about the sources, causes and processes involved with the deterioration of streams in farmed catchments and the consequences of that deterioration. Read more -
April 2019This report summarises analysis methods and outcomes for state and trends across New Zealand’s lake water quality monitoring network. Read more -
April 2019This report summarises analysis methods and outcomes for state and trends across New Zealand’s river water quality monitoring network. Read more -
July 2009This report summarises changes in nuisance periphyton (algal) growth at National River Water Quality Network sites between 1990 and 2006. Read more -
September 2016This draft revised guideline has been released to assist understanding of the proposed amendments to the National Environmental Standard for Assessing and Managing Contaminants in Soil to Protect Human Health. The final revised guideline will be gazetted in early 2017. Read more -
February 2001This 2001 report is an independent appraisal of the health risks posed to New Zealanders by dioxin and dioxin-like polychlorinated biphenyls. The report contains recommendations on managing these chemicals in New Zealand, and the need to reduce population exposures. Read more -
September 2010This study reports on the use, recycling and disposal to landfill in New Zealand of articles containing brominated diphenyl ether (BDE) flame retardants. Read more -
May 2019This report analyses environmental conditions that cause the growth of periphyton in streams and rivers. Read more -
November 2003The Ministry and local government developed these guidelines to ensure the consistent selection and application of the environmental guideline values most commonly used in contaminated site assessments 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 -
November 1998This 1998 report provides data on the levels of dioxins and PCBs in New Zealand retail foods, including dairy products, meat and fish, as well as other staple foods such as potatoes and cereals. 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 -
April 2015One of two reports that assessed the options and implications of using the Macroinvertebrate Community Index (MCI) as an attribute in the National Policy Statement for Freshwater Management. It looked at identifying potential threshold values to define numeric attribute states for MCI. Read more -
December 2013An investigation into the feasibility of using freshwater fish predictive models in national state of the environment indicators. Read more -
February 2012This independent report surveys literature on the regulation of chemical and biological risks in Australia, Canada, China, Japan, the European Union, the United Kingdom, and the United States. Read more -
June 2012This report identifies the key factors that influence businesses' decisions to innovate using new organisms in New Zealand. The aim of the project was to determine whether regulation for managing risks is an important determinant in such decisions. Read more -
July 2001This leaflet provides a general introduction to the Hazardous Substances and New Organisms Act. Read more -
September 2020This document provides detailed technical guidance about the new freshwater planning process (FPP) introduced by the Resource Management Amendment Act 2020. Read more -
September 2002This study measured dioxin in soils at residential properties in the New Plymouth suburb of Paritutu. It was undertaken because of longstanding community issues with the history of dioxin emissions from a chemical plant located in the suburb. Read more -
July 2001An essential reference for people affected by the Hazardous Substances and New Organisms Act. Read more -
June 2000A guide on where to find information on the Hazardous Substances and New Organisms Act 1996. Read more -
February 2001This 2001 report provides details about genetic modification (GM) research being conducted in New Zealand and ideas as to how GM and non-GM crops could coexist in New Zealand. Read more -
June 2002Information for lake managers on pest fish and weeds in New Zealand lakes. Read more -
May 2018Phormidium is a potentially toxic, mat-forming benthic cyanobacterium found in an increasing number of New Zealand rivers. This report outlines a study which investigated drivers of Phormidium blooms in New Zealand rivers to predict risk of blooms. Read more -
April 2019This report summarises analysis methods and outcomes for modelling New Zealand’s river water quality. Read more -
April 2019This report summarises analysis methods and outcomes for modelling New Zealand’s lake water quality. Read more -
May 2019This report develops a model predicting the reference state for stream macroinvertebrates across New Zealand. Read more -
May 2020A literature review of studies that jointly considered climate and freshwater policy in New Zealand. Read more -
July 2013The latest indicator update providing information on the biophysical condition of New Zealand's rivers. Read more -
September 2019This data report provides an annual data picture of brassica grown in New Zealand. Read more
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April 2006In early 2005, the Government held meetings throughout New Zealand to discuss problems facing water management , and to identify possible solutions. This document summarises what we found out, and what we believe needs to be done to improve freshwater management in New Zealand. Read more -
June 2010The report assesses how well Integrated catchment management is working in New Zealand for managing freshwater quality. Read more -
May 2019This report provides information to help interpret trends in water quality of New Zealand’s lakes and rivers. Read more -
October 2018This document describes a framework for assessing the biophysical ecosystem health of fresh water in Aotearoa New Zealand. Read more -
July 2014This leaflet explains what New Zealanders need to know about improving the way we manage our fresh water. Read more -
July 2006This report investigates approaches for the allocation and subsequent reallocation of water in New Zealand, including situations of over-allocation. Read more -
December 1998This 1998 report provides data on the concentrations of dioxins, PCBs, organochlorine pesticides and chlorophenols in New Zealand soils. Read more -
May 2019This report presents and tests a macroinvertebrate metric for New Zealand streams and rivers that is sensitive to changes in flow. Read more -
May 2001This paper is a summary of the report, "Concentrations of selected organochlorines in serum from the non-occupationally exposed New Zealand Population". Read more -
December 1999This 1999 report provides data on the concentrations of dioxins, PCBs, organochlorine pesticides and chlorophenols in New Zealand ambient (outdoor) air. Read more -
April 2019This report summarises analysis methods and outcomes for modelling nitrate-nitrogen leaching from livestock in New Zealand, from 1990 to 2017. Read more -
November 2009This information sheet presents the key findings from data collected from over 900 groundwater sites throughout New Zealand between 1995 and 2008. Read more -
July 2013The latest indicator update providing information on some of the values associated with New Zealand’s fresh and marine waters, measuring recreational water quality. Read more
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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 -
April 2019This guide outlines the process of gathering information to make decisions about investigating, managing and remediating sites in New Zealand contaminated with PFAS. 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 2019This report presents and tests a range of macroinvertebrate metrics for New Zealand streams and rivers that are sensitive to changes in sediment and periphyton. 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