Publication Search
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September 2001This document summaries submissions received on the revised and new ambient air quality guidelines. Read more -
December 2004This discussion document outlines the different ways in which New Zealanders value and use freshwater. It also looks at how New Zealand’s water is managed and the pressures and challenges facing our water management system. 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 -
October 2018This document sets out the Government’s plan to restore and protect freshwater 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 -
November 2001This protocol identifies and describes standardised protocols for use by agencies throughout New Zealand for macroinvertebrate biomonitoring. 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 -
February 2016This consultation document sets out the Government’s proposals to improve the management of fresh water in 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 -
October 2010This discussion document presents options for improving New Zealand’s resource management regulations and processes. Submissions closed 17 December 2010. 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 -
March 2013This paper sets out the Government’s approach to reforming New Zealand’s freshwater management system. Comments closed on 8 April 2013. 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 -
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 -
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 -
August 2005This report summarises the views of the Stakeholder Reference Group on water allocation and use in New Zealand, and the potential approaches for improving our current allocation system. 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. 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 -
February 2017Sediment is an important contaminant in New Zealand freshwaters. This report presents the development of an analytical framework to empirically relate various key instream measures of sediment to catchment sediment loads. Read more -
May 2018The Managing Upstream project aims to help inform management decisions when establishing freshwater objectives under the Freshwater NPS and increase knowledge on the state of different estuary types in New Zealand. Read more -
May 2018The Managing Upstream project aims to help inform management decisions when establishing freshwater objectives under the Freshwater NPS and increase knowledge on the state of different estuary types in New Zealand. Read more -
June 2016This report presents the findings of a review of continuous dissolved oxygen data in New Zealand including an assessment of observed dissolved oxygen concentrations in relation to the National Objectives Framework (point source) band thresholds. 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 -
May 2010This report is one of two prepared for the Ministry for the Environment by NIWA, which update national indicator data for river water quality in New Zealand and help provide the evidence base for policy and decision makers. Read more -
September 2009This report provides an update of results for indicators of groundwater quality in New Zealand. It summarises average water quality at almost 1000 monitoring sites over the period 1995-2008, as well as trends at the same sites within that period of time. 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 assessed Phormidium toxin levels in the Cardrona (Otago), Mataura (Southland) and Hutt (Wellington) Rivers in 2017. Read more -
December 2009The Water Research Strategy sets out the issues for water management and guides investment in water research. It is intended to guide the science sector to deliver the information and tools required to enable world class management of water resources in New Zealand. Read more -
December 2018Ministry for the Environment, in partnership with Bay of Plenty Regional Council, commissioned Perrin Ag Consultants Ltd and Manaaki Whenua Landcare Research to assess the farm/orchard-gate economic impact of applying a range of mitigation practices to reduce losses of nitrogen, phosphorus, E. coli and sediment. Read more -
June 2008This is one in a series of information sheets providing a snapshot of the data in Environment New Zealand 2007, the second national-level state of NZ’s environment report. Each information sheet also provides tips about what you can do to reduce your impact on the environment. Read more -
February 2017This report has been produced to test potential consequences of setting freshwater objectives for hydro scheme operations. Modelling was undertaken of a selection of various scenarios involving an increase in minimum flows in selected rivers to assess the impact of draft proposals to amend the NPS Freshwater Management on the New Zealand electricity system. Read more -
December 2020This factsheet is part of a series and provides information on the new policies for threatened species. Read more -
September 2020A new fast track process for more straightforward applications (district land use activities) has been introduced by RLAA. 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 -
December 2020This factsheet is part of a series and provides information on the new regulations for the application of synthetic nitrogen fertiliser to pastoral land. Read more -
December 2014This guide will help practitioners understand and implement new provisions that determine the timeframes for decision-making on fully and limited notified resource consent applications. Read more