Publication Search
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November 2019This report describes the development of a Hydrogeological-Unit Map for New Zealand, which provides a classification of geological units in terms of their importance for groundwater flow and storage in an ArcGIS seamless digital map. Read more -
April 2019This report provides a national inventory of polychlorinated dibenzo-p-dioxin and polychlorinated dibenzofuran emissions to air, land and water from known sources for 2016. Read more -
November 2019This report reviews groundwater models in New Zealand. Read more -
November 2019This report describes national data sets related to groundwater flux estimation, including the methodologies to undertake this work and resultant digital data sets. Read more -
May 2019This report refines and updates 2011 modelling on suspended sediment loads across New Zealand with new and longer calibration datasets and updated predictors. Read more -
November 2019This report describes an update of New Zealand's depth to hydrogeological basement map, including the methodology used to undertake this work and the resultant digital data sets. Read more -
September 2019This report from ESR describes the methodology and findings of an assessment of changes in levels of compliance with the Drinking-water Standards for New Zealand (DWSNZ) from 2005 to July 2017. Read more -
May 2019This report provides information on the susceptibility to eutrophication of coastal water bodies to nutrient loads from fresh water. Read more -
April 2019This report summaries the published literature on land-use impacts on New Zealand's freshwater and coastal environments. 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 -
May 2019This report outlines recommended changes to the ‘Interim New Zealand Guidelines for Cyanobacteria in Recreational Fresh Waters’. Read more -
May 2019This report analyses seasonal patterns in river and lake water quality across New Zealand, using data from 2013–2017. Read more -
December 2019This guide provides information for people who import, manufacture, or sell products covered by New Zealand’s Water Efficiency Labelling Scheme (WELS). Read more -
May 2019This report reviews how mechanistic (process-based) models simulate periphyton biomass using algorithms describing known growth and loss processes based on nutrients, light, temperature, grazing, and physical factors. Read more -
May 2019This report summarises a workshop held to gather feedback on the ‘Interim New Zealand Guidelines for Cyanobacteria in Recreational Fresh Waters’. Read more -
November 2019This report presents the approach and results of groundwater use in New Zealand. 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 -
May 2019This report analyses environmental conditions that cause the growth of periphyton in streams and rivers. 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 -
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 -
September 2019This data report provides an annual data picture of brassica grown in New Zealand. Read more -
May 2019This report provides information to help interpret trends in water quality of New Zealand’s lakes and rivers. 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 -
May 2019This report considers options for New Zealand to manage the effects of fluctuations in recycling material commodity prices on our resource recovery sector. 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 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 -
May 2019This factsheet has information for businesses on the on the Waste Minimisation (Plastic Shopping Bags) Regulations 2018 which take effect in New Zealand on 1 July 2019. Read more -
May 2019This report commissioned by the National Resource Recovery Taskforce analyses the resource recovery sector in New Zealand and the impacts on recycling following fluctuations in recycling material commodity prices as markets changed. Read more -
August 2019The Government is proposing how New Zealand’s chemical management system can be improved to ensure greater protection for people and the environment. This discussion document outlines our proposals and ask questions for your feedback. Read more -
November 2019This consultation document provides information about the proposed new National Policy Statement for Indigenous Biodiversity. Read more -
September 2019This is the draft of the proposed new National Policy Statement for Freshwater Management (NPS-FM). It sets out the objectives and policies for freshwater management under the Resource Management Act 1991. Read more -
September 2019This report by Kāhui Wai Māori sets out recommendations for our nation to journey together in implementing a managed transitoin to a new system of care and respect for water. 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 -
August 2019This brochure provides a summary of our consultation document on proposed priority products and priority product stewardship guidelines. The consultation will determine which products are included in co-design of regulated production stewardship schemes and the guidelines co-design. Read more -
Proposed priority products and priority product stewardship scheme guidelines: Consultation documentAugust 2019This consultation document presents the Government's proposals for co-design of regulated product stewardship schemes, including the proposed priority products and design guidelines for accredited schemes. Read more -
December 2019This report assesses the costs and benefits of changes to the waste disposal levy. Read more -
November 2019The Resource Management Review Panel has been established to undertake a comprehensive review of the Resource Management Act and other significant legislation comprising the resource management system. 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 -
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 -
November 2019This is a summary of the discussion document for the proposed National Policy Statement for Indigenous Biodiversity. Read more -
November 2019The proposed National Policy Statement for Indigenous Biodiversity (NPSIB) sets out the objectives and policies to identify, protect, manage and restore indigenous biodiversity under the Resource Management Act 1991 (RMA). Read more -
September 2019This document sets out proposals for consultation on measures to stop the degradation of waterways and restore them to a healthy state. Read more -
May 2019This report characterises the pressure on surface water flows from actual water takes for the Horizons (Manawatu-Wanganui) and Greater Wellington regions in the lower half of the North Island. Read more -
September 2019This information sheet focuses on the potential impacts for livestock famers of proposals outlined in the Action for healthy waterways: Discussion document on national direction for freshwater. Read more