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June 1999This 1999 report provides data on the concentrations of dioxins, PCBs, organochlorine pesticides and chlorophenols in sediment and shellfish collected from 12 estuaries throughout New Zealand. Read more -
April 2001This checklist for the removal of petroleum underground storage tanks is taken from Contaminated Land Management Guidelines No. 1 – Reporting on Contaminated Sites in New Zealand (Revised 2011). Read more -
June 2012This report examines whether the scale of compliance costs arising from New Zealand’s hazardous substances regime was comparable with compliance costs imposed on users of chemicals in overseas jurisdictions. Read more -
December 1998This 1998 report provides data on the concentrations of dioxins, PCBs, organochlorine pesticides and chlorophenols in river water and finfish (eel and trout) collected from 13 New Zealand rivers. 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 -
October 2013The Ministry for the Environment commissioned ACIL Allen Consulting to undertake a cost-benefit analysis of sorting options for e-waste plastics being recycled in New Zealand that potentially contain brominated flame retardants. 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 -
March 2008This report estimates the extent of dioxin contamination at sawmill sites in New Zealand where pentachlorophenol (known as PCP) was used as a timber treatment in sprays or dips until its withdrawal in 1988. Read more -
October 2011This checklist should be included as a cover sheet for all contaminated site investigations. The checklist is taken from the Contaminated Land Management Guidelines No.1 – Reporting on Contaminated Sites in New Zealand (Revised 2011). Read more -
October 2011This checklist is taken from Contaminated Land Management Guidelines No. 1 – Reporting on Contaminated Sites in New Zealand (Revised 2011) and relates to the removal and replacement of petroleum underground storage tanks and underground equipment. 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 -
February 2004This guideline provides best practice for the sampling and analysis of soils on sites where hazardous substances are present or suspected in soils in New Zealand, and guidance on the principles governing the interpretation of the data obtained. 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 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 -
May 2005Information on improving the workability of the Hazardous Substances and New Organisms Act. Read more -
March 2018This fact sheet provides information to consider when identifying, assessing and investigating land where PFAS was manufactured, used or disposed. This guidance is intended to be consistent with the PFAS National Environmental Management Plan (PNEMP) developed by the Heads of EPAs Australia and New Zealand (HEPA) and released in February 2018. Read more -
December 2020This factsheet is part of a series and provides information on the new policies for threatened species. 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 -
April 2010This report informs the ‘environmental flows and water measuring’ and ‘water quality limits’ projects commissioned as part of the New Start for Fresh Water programme in 2009. Read more -
May 2020This information sheet describes how attributes in the new National Policy Statement for Freshwater Management contribute to understanding how freshwater provides for ecosystem health and human contact. Read more -
December 2020This factsheet is part of a series and provides information on the new policies for ecosystem health in the National Policy Statement for Freshwater Management 2020 (NPS-FM 2020). Read more -
December 2020This factsheet is part of a series and provides information on the new policies for managing nitrogen in the National Policy Statement for Freshwater Management 2020 (NPS-FM 2020). Read more -
October 2020This factsheet provides information on the new policies for district plans and the role of territorial authorities in the National Policy Statement for Freshwater Management 2020 (NPS-FM 2020). Read more -
September 2019As part of the Essential Freshwater programme, the Government is considering changes to nitrogen and phosphorus regulations. This study aimed to determine the impact of the proposed new nitrogen regulation. Read more -
December 2020This factsheet is part of a series and provides information on the new policies for managing dissolved reactive phosphorus (DRP) in the National Policy Statement for Freshwater Management 2020 (NPS-FM 2020). Read more -
December 2020This factsheet is part of a series and provides information on the new mahinga kai compulsory value, and other Māori values in the National Policy Statement for Freshwater Management 2020 (NPS-FM 2020). Read more -
December 2020This factsheet is part of a series and provides information on the new policies for managing sediment (including deposited and suspended sediment) in the National Policy Statement for Freshwater Management 2020 (NPS-FM 2020). Read more -
December 2020This factsheet is part of a series and provides information on the new policies for setting environmental flows and levels, and requirements to set take limits, in the National Policy Statement for Freshwater Management 2020 (NPS-FM 2020). Read more -
May 2020This information sheet sets out an overview of what the new regulations mean from an iwi/Māori perspective, recognising the importance and significance freshwater has for iwi/Māori and the Crown’s responsibilities under the Treaty of Waitangi. Read more -
December 2000The Stream Periphyton Monitoring Manual describes a standard set of methods for regional councils, consultants and researchers to collect and analyse data on periphyton for resource surveys, impact assessments/monitoring, state of environment reporting and research studies. Read more -
November 2010This report presents a summary of the regional council consent data for water takes between 2009–10. The information in the report has been used to update the freshwater demand environmental indicator. Read more -
October 2011A history of the Fruitgrowers’ Chemical Company (FCC) at Mapua and the clean up of the site. Read more -
November 2017This material is incorporated by reference in the National Policy Statement for Freshwater Management 2020. Read more -
January 2010This report documents the tools being used to support Māori participation in freshwater management under the Resource Management Act 1991 and suggests areas that could be further investigated. Read more -
May 2019This report outlines the different potential approaches for characterising the pressure created by dams on the flow regime of rivers and streams. Read more -
April 2017This report outlines the development of a pressure-state-impact model to predict the effect of water abstractions on river flows, using Canterbury as a case study. 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 -
May 2019This report updates previously published statistics on water consented to be taken from surface and groundwater sources for consumptive uses (such as irrigation or drinking water). Read more -
August 2020The Wetland Delineation Protocols give a robust method for delineating wetlands based on the United States delineation system. Read more -
May 2007This material is incorporated by reference in the National Policy Statement for Freshwater Management 2020. Read more