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.

  • Waikato River

    River Environment Classification

    The River Environment Classification (REC) is a database of catchment spatial attributes, summarised for every segment in New Zealand's network of rivers.
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    Impacts of mining

    Impacts of mining on water quality and mahinga kai.
  • RV Tangaroa in Antarctica

    Our partners & funders

    NIWA has working relationships with hundreds of organisations in New Zealand and overseas.
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    Mean monthly rainfall (mm)

    These datasets are available in a range of formats.
  • Glaciers don't lie

  • Statement of Corporate Intent

    This Statement of Corporate Intent (SCI) sets out NIWA's strategy for delivering against its core purpose over the next five years.
  • Tuna information resource

    Tuna, or freshwater eels, are the most widespread freshwater fish in New Zealand. This 'living' educational resource summarises a large amount of scientific and technical literature.
  • Coming from overseas?

    If you're moving to join us here at NIWA, we want to say thanks for choosing us by helping you with your big move.
  • NOAA Satellite data

    Like the GMS satellite, the NOAA Series of polar orbiting satellites (operated by NOAA, the US National Oceanic and Atmospheric Administration) are a component of the World Weather Watch meteorological satellite network.
  • Sea-level rise

    Education Resource
    One of the major consequences of climate change is rising global sea levels.
  • Nature knows best?

    Feature story
    Returning water to our waterways after we’ve used it in our homes, on farms and in industry is a complex and challenging process.