On 1 July 2025, NIWA merged with GNS Science to become Earth Sciences New Zealand.

Atmospheric analysis

NIWA has been using advanced scientific instruments to measure atmospheric trace gases and isotopes for over 50 years.

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    Water take

    Water take (also known as water abstraction) has a range of valuable public and private uses.
  • When fresh water meets salty water

    When fresh water meets salty water - a classroom exercise that explores the physics of estuaries.
  • Guidelines for sampling freshwater fisheries

    We have prepared a breakdown of the different guidelines that are available for sampling freshwater fisheries. The overview provides links to key documents that explain what should be considered when designing fish monitoring studies and how to implement the various sampling techniques.
  • Splendid Sponges

    An interactive guide to the sponges of New Zealand.
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    Dog Island

    Dog Island levels
  • White sharks

    Research Project
    Where and when do white sharks occur in New Zealand waters, and how can fisheries bycatch be reduced?
  • What is the proposed activity or industry?

    Various industries and land use activities have the potential to impact on water quality and mahinga kai unless properly managed.
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    Seafood sector

    NIWA's seafood sector work comprises our fish, fisheries and aquaculture research and consultancy.
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    Coralline Algae

    This identification guide covers the common crustose coralline algae found in central New Zealand.
  • Loss of riparian vegetation

    Plants and trees along the water margins and banks are called riparian vegetation.
  • Hydro

    Hydro-electricity is a renewable energy source that relies on the inflow of water into storage lakes upstream of a dam.
  • Otago

    The climate of Otago is perhaps the most diverse of any region in New Zealand.