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

Chemical contaminants are chemicals toxic to plants and animals in waterways.

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

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How may the activities of the mining industry influence water resources?

These datasets are available in a range of formats.

An illustrated example, showing how to input data and interpret SolarView results.

The kākahi or freshwater mussel was a valuable mahinga kai resource for many Māori.

Glass eels (about 5.5 to 7.0 cm) arrive in fresh water during spring, especially during September and October, although they may be present from July to December.

The NIWA library collection contains items in a range of formats, covering subjects including atmospheric and climate research, aquaculture, oceanography, fisheries and marine sciences.

These datasets are available in a range of formats.