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

  • Hydro

    Hydro-electricity is a renewable energy source that relies on the inflow of water into storage lakes upstream of a dam.
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    Tuna - elvers and recruitment

    Once in freshwater, glass eels develop into darker pigmented juvenile eels known as elvers.
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    What do 'carbon neutral' and 'carbon footprint' mean?

    A carbon neutral activity is one that has a carbon footprint of zero.
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    Mean daily maximum temperatures (°C)

    These datasets are available in a range of formats.
  • Landscape

    On-Site Household Sanitation Guidelines for Fiji

    Research Project
    A participatory project empowering communities with self-help tools to improve water, sanitation and hygiene.
  • UV Index at Leigh - 16 October 2023

    Yesterday's UV Index

    Plots of UV levels throughout the day at different locations.
  • Chemical contamination and agriculture

    What are the potential sources of chemical contamination from agricultural activities?
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    Map Scott

    Education Resource
    Scott Base, Antarctica Antarctica is the coldest, windiest and driest continent.
  • Gisborne

    In comparison with regions exposed to the west, Gisborne experiences a greater number of weather and climatic extremes.
  • Aquaculture Species

    A handful of species we work on
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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.