Freshwater

We provide public information on river, lake, and groundwater conditions across New Zealand including freshwater quantity and quality.

  • NZFFD publications and catchment number directory

    Access commonly cited references for the NZFFD and the Catchments of New Zealand publication.
  • Biosecurity tools

    Software Tool/Resource
    Our biosecurity management tools include: assessment models, field surveys, management advice and the testing of control methods.
  • Controlling water weeds with grass carp

    Research Project
    A Ministry for Primary Industries-funded study has shown that grass carp, in enclosures, can be used as an effective means of controlling invasive plant species in our waterways.
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    Freshwater pest species

    This is a user guide on non-native fish, reptile, invertebrate, algal and plant species that are recorded in New Zealand freshwaters.
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    Publications for water managers

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    Fish risk assessment model

    FRAM is powerful and simple to use - series of straight-forward questions about the biology and behaviour of any alien species lead to it being ranked and categorised as a high, intermediate, or low ecological risk.
  • Sediment tools

    More information about our sediment tools.
  • Restoration tools

    More about our restoration tools.
  • Catchment modelling

    We offer a range of catchment modelling services.
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    Float your boat! Scientists use hi-tech miniature Q-boat to measure river flows

    News article
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    Robot spies make new science discoveries in Fiordland’s World Heritage Park

    News article
  • Waikato River Independent Scoping Study (WRISS)

    Research Project
    NIWA is involved in research and consultation' aimed at improving the health of our freshwater systems.