This dashboard shows information on the data collected by the regional councils for water quality indicators, analysed as state and trend.
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State
The state is represented by comparison to the National Objectives Framework (NOF) in the National Policy Statement for Freshwater Management 2014
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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 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.
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.
All samples were collected using approved field protocols and have been analysed in accredited laboratories.
Data at this site has not had any form of data processing measures applied. Therefore, the data shown here is less robust and needs to be treated with caution.
Data shown for this site has had some form of quality coding applied. Therefore the data shown here is more robust than data without any quality coding.
Samples are collected bimonthly 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 collected monthly.
Phosphorus
State
Trend
Total Phosphorus sample history at this site
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:
Nitrogen
State
Trend
Total Nitrogen sample history at this site
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:
Nitrogen
State
Trend
Ammonia sample history at this site
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:
Algae
State
Trend
Chlorophyll a sample history at this site
What is this graph showing me?
What do the icons mean?
The bands for Chlorophyll a are as outlined in the NOF for freshwater:
Algae
State
Trend
Cyanobacteria sample history at this site
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:
Clarity
State
Trend
Secchi disc depth sample history at this site
What is this graph showing me?
What do the icons mean?
The grades for Secchi disc depth are defined as follows: