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

Freshwater quality

NIWA provides measurement, knowledge and tools to the managers of New Zealand's stream, river, lake and groundwater quality.

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    Resource survey and information

    An ability to discover basic information about plants in waterways is the foundation to solving a spectrum of problems that face our freshwaters today.
    Freshwater quality

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    Freshwater aquatic plants

    Service
    The centre provides research, services and solutions spanning the spectrum of freshwater plant problems within New Zealand.
    Algae
    Freshwater quality