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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    Mitigation

    Simple steps to minimise the effects of chemical contamination on water quality and mahinga kai.
    Freshwater quality

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    Mitigation

    Steps to minimise the effects of barriers and altered water flows on water quality and mahinga kai

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    Mitigation

    Here are some simple steps to minimise the effects of nutrient overloading on water quality and mahinga kai.
    Freshwater quality

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    Mitigation

    Simple steps to minimise the effects of infectious substances on water quality and mahinga kai.
    Freshwater quality

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    Mitigation

    Here are some simple steps to minimise the effects of sediment on water quality and mahinga kai.
    Freshwater quality

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    Mitigation and best practice options

    Steps to minimise the effects on water quality and mahinga kai.

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    Impacts of wastewater treatment

    How does wastewater treatment impact water quality and mahinga kai?

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    Impacts of Aquaculture

    Impacts of commercial aquaculture on water quality and customary harvest activities

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    Meat and dairy processing activities

    Meat and dairy products are processed in dairy factories, meat works, tanneries, and factories.

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    Further reading

    References, further reading, and links to useful websites.

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    Geothermal

    Heat stored in the earth is extracted to create geothermal power.

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    Thermal

    Thermal generation supplies up to 50% of power in Aotearoa.