Atmospheric analysis

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

There are two species of kōura or freshwater crayfish in Aotearoa.

Find out more about our water quality tools.

Waterways can easily become contaminated by pathogens when effluent is discharged nearby.

A collection of ID guides to algae. Groups include major freshwater algal groups, diatoms and blue-green (cyanobacteria), red and green algae.

NIWA develops and supplies custom software for environmental analysis and modelling.

The topography of the North Island has a profound effect on the weather of the Bay of Plenty region.

This is a sub-tropical climate zone, with warm humid summers and mild winters.

The coldest seawater on earth could help scientists understand why Antarctic sea ice is growing in a warming world

NIWA's Hydro Web Portal provides river flow and water quality monitoring data from NIWA’s Benchmark river monitoring network.

Maps of average annual rainfall, temperature and other climate variables have been produced for all of New Zealand, based on the period 1981–2010.

Find out more about working at NIWA