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Wainui Stream Upstream from Road Bridge

Wainui Stream is a small stream that flows into the Akaroa Harbour at Wainui, on Banks Peninsula.

The stream bed is rocky and shaded by willows on either side. Water levels are generally shallower than 30cm.

Poor water quality with high E.coli concentrations in summer.

Scientific Indicators
Scientific data for this site

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

  • State

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

    This site is a Lowland Rural site. Currently showing the state of this site compared to:

  • The state is also represented by comparison to the National Objectives Framework (NOF) in the National Policy Statement for Freshwater Management 2014  for some indicators.

  • 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:

The state is also represented by comparison to the National Objectives Framework (NOF) in the National Policy Statement for Freshwater Management 2014  for some indicators.


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 for this site?
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. Therefore the data shown here can be trusted.

Trend - SAMPLING FREQUENCY

Samples are collected quarterly at this site. Proposed national guidelines suggest monthly sampling is required for trend analysis. Therefore, any trends shown here are less robust than those calculated from data collected monthly. New Zealand's councils are currently reviewing their sampling procedures and aim to adjust their sampling frequency to monthly. This will increase the robustness of the trend analyses.

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
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State
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State
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{{nofMsg(ECOLI.NofMedianScore)}} Annual median
N/A
NOF Band Annual median
Trend
{{trendMsg(ECOLI)}}

Sample history at this site

Showing:
E. coli samples for Wainui Stream Upstream from Road Bridge
n/100ml

What is this graph showing me?

This graph is displaying E. coli concentrations over the selected time period. You can adjust this period by changing the dropdowns. These records form the basis for the state and trend indicators displayed on the dashboard. This data is raw and has not had any methodology applied to it.

Find out about how State and Trend are calculated.

What do the icons mean?

It is important to note that changes to the National Policy Statement for Freshwater Management 2014 were announced in August 2017. The changes have removed the below set of criteria for E. coli, and any reference to this use of water (i.e. occasional immersion). The new criteria, effective from 6 September 2017, are for the use of water for swimming and other full contact, sustained exposure activities (diving, surfing etc). The data on LAWA has not yet been updated to reflect the new requirements.

The bands for E. coli are as outlined in the NOF for freshwater:

A
Water quality is considered suitable for the designated use. People are exposed to a very low risk of infection (less than 0.1% risk) from contact with water during activities with occasional immersion (such as wading and boating).
B
Water quality is considered suitable for the designated use. People are exposed to a low risk of infection (less than 1% risk) from contact with water during activities with occasional immersion (such as wading and boating).
C
Water quality is considered suitable for the designated use. People are exposed to a moderate risk of infection (less than 5% risk) from contact with water during activities with occasional immersion (such as wading and boating).
National bottom line: Annual median 1000 n/100mL.
D
Water quality is not considered suitable for the designated use. People are exposed to a high risk of infection (greater than 5% risk) from contact with water during activities with occasional immersion (such as wading and boating).

Clarity

Black disc
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State
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Trend
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Sample history at this site

Showing:
Black Disc samples for Wainui Stream Upstream from Road Bridge
metres

What is this graph showing me?

This graph is displaying Black Disc readings over the selected time period. You can adjust this period by changing the dropdowns. These records form the basis for the state and trend indicators displayed on the dashboard. This data is raw and has not had any methodology applied to it.

Find out about how State and Trend are calculated.

Turbidity
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State
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Trend
{{trendMsg(TURB)}}

Sample history at this site

Showing:
Turbidity samples for Wainui Stream Upstream from Road Bridge
NTU

What is this graph showing me?

This graph is displaying Turbidity levels over the selected time period. You can adjust this period by changing the dropdowns. These records form the basis for the state and trend indicators displayed on the dashboard. This data is raw and has not had any methodology applied to it.

Find out about how State and Trend are calculated.

Nitrogen

Total Nitrogen
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State
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Trend
{{trendMsg(TN)}}

Sample history at this site

Showing:
Total Nitrogen samples for Wainui Stream Upstream from Road Bridge
g/m3

What is this graph showing me?

This graph is displaying Total Nitrogen concentrations over the selected time period. You can adjust this period by changing the dropdowns. These records form the basis for the state and trend indicators displayed on the dashboard. This data is raw and has not had any methodology applied to it.

Find out about how State and Trend are calculated.

Total Oxidised Nitrogen
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State
{{stateMsg(TON.StateScore)}}
State
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{{nofMsg(TON.NofMedianScore)}} Annual median
N/A
NOF Band Annual median
{{percentileValue('TON')}}
State
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{{nofMsg(TON.NofPercentileScore)}} 95th percentile
N/A
NOF Band 95th percentile
Trend
{{trendMsg(TON)}}

Sample history at this site

Showing:
Total Oxidised Nitrogen samples for Wainui Stream Upstream from Road Bridge
g/m3

What is this graph showing me?

This graph is displaying Total Oxidised Nitrogen concentrations over the selected time period. You can adjust this period by changing the dropdowns. These records form the basis for the state and trend indicators displayed on the dashboard. This data is raw and has not had any methodology applied to it.

Find out about how State and Trend are calculated.

What do the icons mean?

The bands for Total Oxidised Nitrogen are as outlined in the NOF for freshwater:

A
Water quality is considered suitable for the designated use. High conservation values system. Unlikely to be effects even on sensitive species.
B
Water quality is considered suitable for the designated use. Some growth effect on up to 5% of species.
C
Water quality is considered suitable for the designated use. Growth effects on up to 20% of species (mainly sensitive species such as fish). No acute effects.
National bottom line: Annual median 6.9 mg NO3-N/L. Annual 95th percentile 9.8 mg NO3-N/L (milligrams nitrate-nitrogen per litre). Note 1 mg/l = 1 g/m3
D
Water quality is not considered suitable for the designated use. Impacts on growth of multiple species, and effects starts approaching acute impact level (i.e. risk of death) for sensitive species at higher concentrations (>20 mg/L).
Ammoniacal Nitrogen
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State
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{{nofMedianValue('NH4')}}
State
{{NH4.NofMedianScore | uppercase}}
{{nofMsg(NH4.NofMedianScore)}} Annual median
N/A
NOF Band Annual median
{{maximumValue('NH4')}}
State
{{NH4.NofMaxmiumScore | uppercase}}
{{nofMsg(NH4.NofMaxmiumScore)}} Annual maximum
N/A
NOF Band Annual maximum
Trend
{{trendMsg(NH4)}}

Sample history at this site

Showing:
Ammoniacal Nitrogen samples for Wainui Stream Upstream from Road Bridge
g/m3

What is this graph showing me?

This graph is displaying Ammoniacal Nitrogen concentrations over the selected time period. You can adjust this period by changing the dropdowns. These records form the basis for the state and trend indicators displayed on the dashboard. This data is raw and has not had any methodology applied to it.

Find out about how State and Trend are calculated.

What do the icons mean?

The bands for Ammoniacal Nitrogen are as outlined in the NOF for freshwater:

A
Water quality is considered suitable for the designated use. 99% species protection level: No observed effect on any species tested.
B
Water quality is considered suitable for the designated use. 95% species protection level: Starts impacting occasionally on the 5% most sensitive species.
C
Water quality is considered suitable for the designated use. 80% species protection level: Starts impacting regularly on the 20% most sensitive species (reduced survival of most sensitive species).
National bottom line: Annual median 1.30 mg NH4-N/L. Annual maximum 2.20 mg NH4-N/L (milligrams ammoniacal-nitrogen per litre). Note 1 mg/l = 1 g/m3
D
Water quality is not considered suitable for the designated use. Starts approaching acute impact level (ie risk of death) for sensitive species.

Phosphorus

Dissolved Reactive Phosphorus
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State
{{stateMsg(DRP.StateScore)}}
Trend
{{trendMsg(DRP)}}

Sample history at this site

Showing:
Dissolved Reactive Phosphorus samples for Wainui Stream Upstream from Road Bridge
g/m3

What is this graph showing me?

This graph is displaying Dissolved Reactive Phosphorus concentrations over the selected time period. You can adjust this period by changing the dropdowns. These records form the basis for the state and trend indicators displayed on the dashboard. This data is raw and has not had any methodology applied to it.

Find out about how State and Trend are calculated.

Total Phosphorus
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State
{{stateMsg(TP.StateScore)}}
Trend
{{trendMsg(TP)}}

Sample history at this site

Showing:
Total Phosphorus samples for Wainui Stream Upstream from Road Bridge
g/m3

What is this graph showing me?

This graph is displaying Total Phosphorus concentrations over the selected time period. You can adjust this period by changing the dropdowns. These records form the basis for the state and trend indicators displayed on the dashboard. This data is raw and has not had any methodology applied to it.

Find out about how State and Trend are calculated.

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.

Recreational activities
Site suitable for these activities
  • Private Land
    Private land with access by permission
  • Activity
    No information available

Rivers and Lakes are great natural  playgrounds but they can be unpredictable. Be aware of the other potential risks before jumping in.

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