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Upper Buller

The upper reaches of the Buller catchment make up the southern end of Tasman District. The Buller River is 177 km long, making it the 8th longest river in the South Island. It is fed by Lake Rotoroa and Lake Rotoiti in Nelson Lakes National Park and the Maruia and Matakitaki rivers.

The Buller catchment comprises a mixture of mountainous wilderness and cultivated river valleys used mostly for dairy farms and some forestry. Since 2001 the Buller Water Conservation Order has given additional protection to parts of the Buller catchment, and the Conservation Order was updated in 2008.

In October 2005 the invasive algae didymo was discovered in the Buller Riverand in May 2010 didymo was also discovered in the Maruia River.

The maximum consented daily water take from the Buller catchment is 750 cubic metres.
As this catchment has it's headwaters in the Tasman district and flows the sea from the West Coast region, further information can be found within the West Coast Regional Council portion of this site.

Sites 6

Monitored sites in the Upper Buller 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

This data 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.

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
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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