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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    Mitigation and best practice options

    Some simple steps to minimise the effects of mining activities on water quality and mahinga kai.
    Freshwater

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    Science and Technology Fairs

    NIWA is a major sponsor of the Auckland, Manukau City, North Harbour, Waikato, Wellington, Canterbury and Bay of Plenty – Science & Technology Fairs.

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    High Performance Computing Facility

    Facility
    The High Performance Computing Facility (HPCF) is supercharging New Zealand science.
    High Performance computing

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    Hotspot Watch Updates

    This weekly update helps assess likelihood of extremely dry weather preceding a drought.
    Climate and weather
    Extreme weather

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    Mean daily global radiation (Mj/sq m)

    These datasets are available in a range of formats.

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    New Zealand rushes (Juncus): factsheets and key

    New Zealand rushes (Juncus): species-level factsheets.
    Wetlands

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    Chemical contamination and wood processing

    What are the sources of chemical contamination from wood processing?

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    Algae ID guides

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

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    SHMAK

    Stream Health Monitoring and Assessment Kit

    Service
    How healthy is your stream? SHMAK - the New Zealand Stream Health Monitoring and Assessment Kit - has been designed to help you find out.
    Citizen science
    Freshwater
    Ecological monitoring

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    Toitoi

    One of the most common species of freshwater fish in Aotearoa is the common bully or toitoi.
    Freshwater quality

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    Bay of Plenty

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

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    Impacts of water dams

    What are the impacts of water dams on water quality and mahinga kai?