Freshwater

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

Rachel Crawford and Paul Franklin inspecting a fish passage on the Waikato River.

Freshwater and Estuaries Update

A seasonal review and outlook for New Zealand's water resources, and an update on NIWA's freshwater research

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    Altered water flow and hydro

    How do hydro-dams potentially influence water flows?

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    Environmental Information Update

    Publication series
    The latest updates about NIWA's EI work delivered to your inbox in our e-newsletter.
    Freshwater quality
    Tsunami

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    Examples and expertise

    NIWA has wide-ranging expertise in toxicology testing.

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    Standard tests

    NIWA offers both water and sediment tests, using a range of organisms.

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    Mitigation

    Some options to minimise the effects of dams on water quality and mahinga kai.

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    Impacts of geothermal

    How does geothermal energy generation impact water quality and mahinga kai?

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    Mitigation

    Steps to minimise the effects of thermal energy generation on water quality and mahinga kai.

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    Impacts of thermal

    Impacts of thermal energy generation activities on water quality and mahinga kai.

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    Mitigation

    Ways to minimise the effects of hydro-dams on water quality and mahinga kai.

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    How do we gauge the state of New Zealand’s overall water quality?

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    How is water clarity measured and what is its significance?

    Water quality levels are indicated by how well light transmits through water

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    How do I compile accurate water quality models when there is incomplete or highly erratic data?

    In order to compile accurate water quality models, you need data that draws on comprehensive information about water quality.