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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    Graphing with Microsoft Excel

    How do I create a graph?
    Using Microsoft® Excel is easy because the Chart Wizard does all the work for you!
    Simply enter the data for your data table.
    Highlight the cells you want to graph.
    Click on the Chart Wizard icon on the Tool Bar.
    Select the chart type you want to use and click Next.
    Click Next to confirm the range of cells.
    Give your graph a title, label x- and y-axis and click Next.
    Click on the gridlines tab to remove or add gridlines.
    Click Finish and graph is complete!
    Help, my graph is too small!
    When the chart wizard creates your graph it will probably be too smal
  • New Zealand Palaeotsunami Database

    Software Tool/Resource
    The New Zealand Palaeotsunami Database (Database) brings together all known information about tsunamis that occurred prior to written records.
  • UV index signage at Lauder

    UV Index Information

    Education Resource
    The UV Index is a measure of the intensity of UV radiation. The UV Index supersedes the idea of "Time to Burn" or "Burn Time", which has been used previously in New Zealand.
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    Tuna - recreational fisheries

    The majority of New Zealanders are able to recall a story about catching eels when they were children.
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    Suspended-sediment yield estimator

    This national GIS ‘layer’ enables reconnaissance-scale estimation of suspended-sediment yields from New Zealand’s rivers and streams. It has been developed by NIWA in collaboration with Landcare Research.
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    Freshwater databases online

    More information about our online freshwater databases.
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    What ails our estuaries - problems and solutions

    Estuaries are at the bottom of the freshwater drainage network and, effectively, are a part of it.
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    Summer Series 7: Beware! The golden triangle of the bronze whaler

    News article
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    Kōura

    There are two species of kōura or freshwater crayfish in Aotearoa.
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    Summer Series 5: Paua is a summer delicacy. Dig deep for the blackfoot sea snail!

    News article
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    Infectious substances

    Waterways can easily become contaminated by pathogens when effluent is discharged nearby.
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    Statement of Core Purpose

    The Statement of Core Purpose spells out why the Government owns Crown Research Institutes and what it expects from them.