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Auckland region


The Orewa River monitoring station is located on Kowhai Ave, Orewa.
The catchment comprised of limestone lithology, therefore during dry periods the flow at the monitoring site may cease.


The purpose of the Orewa site is for regional and long-term monitoring of the Auckland region.
Orewa is a flow monitoring site with a Trapozoidal Flat V weir as the level control. 
It was upgraded to this on the 23/02/2008 from the original 'V Notch' structure due to a requirement to facilitate fish passage .

Flow Data
Scientific data for this flow site
  • Live Flow Data
    Latest sample:
    Percentage of time flow exceeded
    High flowLess than 5%
    Elevated flow5% to 29%
    Normal flow30% to 69%
    Reduced flow70% to 94%
    Low flow95% to 100%
    Show more information Hide

    • Last 24 hours
    • Last 7 days
    • Last 30 days

    Key figures

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    Other notable measurements

    Droughts Month/Year Flow
    March 1994 -0.211
    Floods Month/Year Flow
    July 2002 3.021