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Ngaruroro River

The Ngaruroro River is Hawke’s Bay’s 4th largest river with a surface area of 1,950 square kilometres. The catchment’s headwaters emerge in the Kaweka Ranges (north) and the Ruahine Ranges (south). The river has a mean annual flow of 42.146 cumecs, measured at the NIWA site at Chesterhope Bridge in the lower catchment.  This catchment includes the Karamu Catchment which drains a large part of the eastern Heretaunga Plains.

The upper half of the Ngaruroro catchment is predominantly in DOC estate forest park or plantation forestry. The remainder of the catchment is in low hill, pastoral farming with many vineyards in the mid to lower reaches. Some peri-urban/commercial development is also near the river on the lower reaches. The river environment has a cool, wet climate.

The river has good quality habitat for most of its length with riffles, pools and bends and a predominantly large cobble or cobble streambed.

A wide range of fish species is present in the Ngaruroro River, including many native fish which have high value as mahinga kai (traditional Māori food) and a world class trout fishery. Fish species include Cran’s bully, common bully, giant bully, koaro, inanga, dwarf galaxiid, smelt, shortfin eel, longfin eel, torrentfish, lamprey, koura, yellow eyed mullet, black flounder (patiki), rainbow trout and brown trout.

Sites 7

Monitored sites in the Ngaruroro River catchment

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Scientific Indicators
Scientific data for this catchment

This dashboard shows information on the data collected by the regional councils for water quality indicators, analysed as state and trend.

The state for the catchment is represented by the median concentration for the parameter across all sites within the catchment and then compares that value to the quartiles for all monitored sites in New Zealand.

Click on the parameters state icons to compare this catchment with others in the region.

  • State

    State shows how the median of samples from this site compares to other sites

  • Trend

    Trend shows how the quality of water is changing over time. Depending on the sampling history duration, five and ten year timescales are available:

Can I trust this data?

The Cawthron Institute has worked alongside regional councils to verify the processes and methods used for data collection, laboratory analysis of samples collected and the statistical analysis and interpretation of the results presented.

If all Cawthron ticks are green, then you can trust this data. However, if one or more ticks are orange, then conclusions should be treated with some caution.

For more details on each tick, see our 'Can I Trust This Data?' Factsheet.

Can I trust the data?
Data Collection

All samples were collected using approved field protocols and have been analysed in accredited laboratories. Therefore the data shown here has been collected and analysed following best practice.

State

All samples were collected using approved field protocols and have been analysed in accredited laboratories.

Trend - Adjustment for flow

This data is not flow adjusted. National guidelines suggest that flow-sensitive variables are flow 'adjusted' before trend analysis. Therefore, any trends shown here may be affected by variations in flow across sampling occasions.

Bacteria

E. coli
State
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Trend
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Clarity

Clarity

Black disc
State
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Trend
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Clarity

Turbidity
State
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Trend
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Nitrogen

Nitrogen

Total Nitrogen
State
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Trend
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Nitrogen

Total Oxidised Nitrogen
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Trend
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Nitrogen

Ammoniacal Nitrogen
State
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Trend
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Phosphorus

Phosphorus

Dissolved Reactive Phosphorus
State
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Trend
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Phosphorus

Total Phosphorus
State
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Trend
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Download Data

.ZIP file of indicator readings for all sites in New Zealand
Download
Disclaimer

 LAWA Partners shall not be liable, whether in contract, tort, equity or otherwise, for any loss or damage of any type (including consequential losses) arising directly or indirectly from the inadequacy, inaccuracy or any other deficiency in information supplied irrespective of the cause.  Use of information supplied is entirely at the risk of the recipient and shall be deemed to be acceptance of this liability exclusion.