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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    Nutrients and urbanisation

    What are the potential sources of nutrients from urbanisation?
    Freshwater quality

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    Chemical contamination and urbanisation

    What are the sources of chemical contamination resulting from urbanisation?

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    Riparian vegetation and horticulture

    How may horticultural activities impact riparian vegetation around a waterway?

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    Water resources and horticulture

    How do horticultural activities potentially influence water flows?

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    Chemical contamination and horticulture

    What are the potential sources of chemical contamination from horticulture activities?

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    Nutrients and horticulture

    What are the potential sources of nutrients from horticultural activities?
    Freshwater quality

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    Sediment and horticulture

    How may horticultural activities increase sediments in waterways?
    Freshwater quality

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    Instream barriers and forestry

    How do instream barriers as a result of forestry activities potentially influence water resources?

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    Riparian vegetation and forestry

    How may forestry activities impact riparian vegetation around a waterway?

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    Chemical contamination and forestry

    What are the potential sources of chemical contamination from forestry activities?

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    Nutrients and agriculture

    What are the potential sources of nutrients from agricultural activities?
    Agriculture
    Freshwater quality

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    Discharges

    Discharging into a waterway is likely to impact water quality.