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Tutira lake centre

Water samples are collected from both surface and deep layers using the buoy.  Data is also transmitted from the buoy. This buoy was donated by Ministry for Primary Industries and is managed by Hawke's Bay Regional Council.

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

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

  • 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, quality assurance and the statistical analysis and interpretation of the results presented.

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

Can I trust the data for this site?
Data Collection

Lake water quality is being monitored in this region. Proposed National Guidelines suggest that all councils should monitor lake water quality as part of their State of the Environment Monitoring Programmes, if lakes occur in the region.

State - Sampling

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

State - Quality Assurance - Data Processing

Data at this site has had some form of data processing measures applied. Therefore, the data shown here are more robust than data with no data processing applied.

State - Quality Assurance - Quality Coding

Data shown here hasn’t had any kind of quality coding applied. Therefore, the data shown here is less robust than quality coded data.

Trend - Sampling Frequency

Samples are collected monthly, bimonthly and quarterly at this site. Proposed national guidelines suggest monthly sampling is required for robust trend analysis. Therefore, any trends shown here are less robust than those calculated from data that is solely collected monthly.

Phosphorus

Total Phosphorus
{{medianValue('TP')}}
State
{{TP.StateScore | uppercase}}
{{stateMsg('TP', TP.StateScore)}}
{{stateMsg('TP', TP.StateScore)}}
Trend
{{trendMsg('TP', TP)}}

Total Phosphorus sample history at this site

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Total Phosphorus samples for Tutira lake centre
mg/m³
Date

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.

What do the icons mean?

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

A
Lake ecological communities are healthy and resilient similar to natural reference conditions
B
Lake ecological communities are slightly impacted by additional algal and plant growth arising from nutrients levels that are elevated above natural conditions
C
Lake ecological communities are moderately impacted by additional algal and plant growth arising from nutrients levels that are elevated well above natural reference conditions
National bottom line: Annual median 50 mg/m³
D
Lake ecological communities have undergone or are at high risk of a regime shift to a persistent, degraded state, due to impacts of elevated nutrients leading to excessive algal growth and/or plant growth, as well as from losing oxygen in bottom waters of deep lakes

Download data history as a .csv file

Nitrogen

Nitrogen

Total Nitrogen
{{medianValue('TN')}}
State
{{TN.StateScore | uppercase}}
{{stateMsg('TN', TN.StateScore)}}
{{stateMsg('TN', TN.StateScore)}}
Trend
{{trendMsg('TN', TN)}}

Total Nitrogen sample history at this site

Showing:
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Total Nitrogen samples for Tutira lake centre
mg/m³
Date

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.

What do the icons mean?

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

A
Lake ecological communities are healthy and resilient similar to natural reference conditions
B
Lake ecological communities are slightly impacted by additional algal and plant growth arising from nutrients levels that are elevated above natural conditions
C
Lake ecological communities are moderately impacted by additional algal and plant growth arising from nutrients levels that are elevated well above natural reference conditions
National bottom line: 750 mg/m³ for seasonally stratified and brackish lakes. 800 mg/m³ for polymictic lakes.
D
Lake ecological communities have undergone or are at high risk of a regime shift to a persistent, degraded state, due to impacts of elevated nutrients leading to excessive algal growth and/or plant growth, as well as from losing oxygen in bottom waters of deep lakes

Download data history as a .csv file

Nitrogen

Ammonia
{{medianValue('NH4N')}}
State
{{NH4N.StateScore | uppercase}}
{{stateMsg('NH4N', NH4N.StateScore)}}
{{stateMsg('NH4N', NH4N.StateScore)}}
Trend
{{trendMsg('NH4N', NH4N)}}

Ammonia sample history at this site

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Ammonia samples for Tutira lake centre
mg NH4-N/l
Date

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 Ammonia are as outlined in the NOF for freshwater:

A
B
C
D

Download data history as a .csv file

Algae

Algae

Chlorophyll a
{{medianValue('CHLA')}}
State
{{CHLA.StateScore | uppercase}}
{{stateMsg('CHLA', CHLA.StateScore)}}
{{stateMsg('CHLA', CHLA.StateScore)}}
Trend
{{trendMsg('CHLA', CHLA)}}

Chlorophyll a sample history at this site

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Chlorophyll a samples for Tutira lake centre
mg/m³
Date

What is this graph showing me?

What do the icons mean?

The bands for Chlorophyll a are as outlined in the NOF for freshwater:

A
Lake ecological communities are healthy and resilient similar to natural reference conditions
B
Lake ecological communities are slightly impacted by additional algal and plant growth arising from nutrients levels that are elevated above natural conditions
C
Lake ecological communities are moderately impacted by additional algal and plant growth arising from nutrients levels that are elevated well above natural reference conditions
National bottom line: Annual median 12 mg/m³. Annual maximum 60 mg/m³.
D
Lake ecological communities have undergone or are at high risk of a regime shift to a persistent, degraded state, due to impacts of elevated nutrients leading to excessive algal growth and/or plant growth, as well as from losing oxygen in bottom waters of deep lakes

Download data history as a .csv file

Algae

Cyanobacteria
{{medianValue('CYAN')}}
State
{{CYAN.StateScore | uppercase}}
{{stateMsg('CYAN', CYAN.StateScore)}}
{{stateMsg('CYAN', CYAN.StateScore)}}
Trend
{{trendMsg('CYAN', CYAN)}}

Cyanobacteria sample history at this site

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Cyanobacteria samples for Tutira lake centre
mm³/l
Date

What is this graph showing me?

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 modified the NOF bands for planktonic cyanobacteria. These changes came into effect on 6 September 2017. The data on LAWA has not yet been updated to reflect the new requirements.

The bands for Cyanobacteria are as outlined in the NOF for freshwater:

A
Risk exposure from cyanobacteria is no different to that in natural conditions (from any contact with fresh water)
B
N/A
C
Low risk of health effects from exposure to cyanobacteria (from any contact with fresh water)
National bottom line: 80th percentile = 1.8 mm³/L biovolume equivalent of potentially toxic cyanobacteria OR 10 mm³/L total biovolume of all cyanobacteria.
D
Potential health risks (eg, respiratory, irritation and allergy symptoms) exist from exposure to cyanobacteria (from any contact with fresh water)

Download data history as a .csv file

Clarity

Secchi disc depth
{{medianValue('SECCHI')}}
State
{{SECCHI.StateScore | uppercase}}
{{stateMsg('SECCHI', SECCHI.StateScore)}}
{{stateMsg('SECCHI', SECCHI.StateScore)}}
Trend
{{trendMsg('SECCHI', SECCHI)}}

Secchi disc depth sample history at this site

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Secchi disc depth samples for Tutira lake centre
metres
Date

What is this graph showing me?

What do the icons mean?

The grades for Secchi disc depth are defined as follows:

A
Water clarity is greater than 7 metres in depth
B
Water clarity is greater than 3 metres and less than 7 metres in depth
C
Water clarity is greater than 1 metre and less than 3 metres in depth
D
Water clarity is less than 1 metre in depth

Download data history as a .csv file

Bacteria

E. coli
{{medianValue('ECOLI')}}
State
{{ECOLI.StateScore | uppercase}}
{{stateMsg('ECOLI', ECOLI.StateScore)}}
{{stateMsg('ECOLI', ECOLI.StateScore)}}
Trend
{{trendMsg('ECOLI', ECOLI)}}

E. coli sample history at this site

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E. coli samples for Tutira lake centre
n/100ml
Date

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
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
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
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 1000/100mL
D
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)

Download data history as a .csv file

Download Data

.ZIP file of lake data.
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
  • Suitable for fishing
  • Suitable for boats/kayaking

    Paddle boats only but with care as  HBDHB Public Health Unit recommends avoiding contact with the water.  No motorboats are permitted on the lake.

  • Suitable for picnicing

    Camping sites are available in the Regional Park - a flat shaded area has been fenced and planted and there are picnic areas, cold water, composting toilets (no showers or cooking). No fires are permitted to be lit in the park.  

  • Suitable for walking

    There are 4 walking tracks within the Regional Park.