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Awanui River

The Victoria and Takahue rivers form the headwaters of the Awanui River and both begin in the Raetea Forest (Mangamuka Ranges). The Victoria River is approximately 20 km long and flows northwest, while the Takahue River flows north to where they both meet at Pamapuria, 8 km east of Kaitaia. The upper reaches of both rivers are dominated by native forest while the lower reaches flow through pastoral land.

From Pamapuria, the Awanui River meanders through predominately pastoral land through Kaitaia, then out into the Rangaunu Harbour. The Awanui catchment is approximately 637 square kilometres and is 34 km long. There are four sampling sites in the Awanui catchment.

The geology in the Victoria River is classified as volcanic acidic, which then changes to soft sedimentary in the mid to lower reaches of the Awanui River. The upper reaches of the Victoria River provide excellent habitat for aquatic life.

Water quality is good in the upper catchment with excellent water clarity and low nutrient levels. The Victoria River is a popular swimming site at the Raetea Forest Department of Conservation Reserve. The lower site in the catchment is degraded with elevated turbidity and nutrient levels.

Sites 4

Monitored sites in the Awanui 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 site is not sampled during high flows so the data shown only represents base flow conditions. Proposed national guidelines recommend sampling during both low and high flows to get a full picture of water quality at the site.

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
State
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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
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