Freshwater pollution

Constructed wetlands a natural solution to reduce agricultural pollution.

NIWA's Urban Runoff Quality Information System (URQIS) provides planners, engineers and researchers with information about the quality of stormwater from different locations and landuses and under different flow conditions.

Little is known what impact artificial streetlights have on flying freshwater insects which are integral to our waterway ecosystems.

Constructed wetlands, detention bunds, woodchip denitrification filters and planted riparian buffers are examples of a growing suite of edge-of-field and farm-scale mitigation systems that are being trialled across rural New Zealand to reduce the impact of diffuse pollution on freshwater quality

Most of the plastic in the ocean originates on land, being carried to the estuaries and coasts by rivers.

New Zealand is a land of erosion. We’re losing about 192 million tonnes of soil a year, according to the latest report Our Land 2018, from the Ministry for the Environment and Statistics NZ.

NIWA offers a range of standard toxicity tests for both freshwater and marine environments.

Estuaries are at the bottom of the freshwater drainage network and, effectively, are a part of it.

When soils erode, sediments are washed into waterways.

NIWA's research on freshwater monitoring and reporting is one of three research areas within the 'Values, Monitoring and Outcomes' (VMO) programme led by Landcare Research.

A participatory project empowering communities with self-help tools to improve water, sanitation and hygiene.

Developing & monitoring technologies, statistical assessment methods & community approaches to assess the state, trends & drivers of water quality.