Freshwater

NIWA research and tools support the protection, restoration and management of New Zealand’s freshwater fish species and the habitats that sustain them.

NIWA offers a range of standard toxicity tests for both freshwater and marine environments and is at the cutting edge of toxicity-related research.

Monitoring the health of freshwater lakes and streams.

Transforming coastal lowland systems threatened by sea-level rise into prosperous communities

A 3D Printer is helping save New Zealand’s endangered native fish

Reducing the risk of new freshwater invasive species, minimising the impacts of these species, and developing methods for reducing or eradicating those populations.

A NIWA-led project to support anyone wishing to deploy a water quality sensor in rivers, lakes and estuaries.

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.

The New Zealand Freshwater Fish Database (NZFFD) contains over 50,000 freshwater fish observations from across New Zealand from 1901 to the present.

A new NIWA study in Wellington Harbour will help scientists find untapped drinking water around the world.

About 76 per cent of indigenous freshwater fish species, that’s 39 out of 54, are threatened with extinction or at risk of becoming threatened.

Deep beneath Waitomo’s rolling hills lies a maze of caves and underground rivers. Here, NIWA researchers braved the dark waters to measure the current and hunt for fishy invaders under the twinkle of the cave’s magical glowworms.