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Lake size{{lakeDetails.size}}
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Geomorphic type{{lakeDetails.geomorphictype}}
This dashboard shows information on the data collected by the regional councils and unitary authorities for two indicators of lake water quality and ecological condition: TLI (Trophic Level Index) and LakeSPI (Lake Submerged Plant Indicators). Select an indicator to see the historical results.
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Water Quality
Trophic Level Index (TLI)
{{comment()}}The TLI score is an indicator of lake health and is determined from a suite of water quality measurements.
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Ecological Conditions
Lake Submerged Plant Indicators (LakeSPI)
{{comment()}}The LakeSPI status describes the ecological condition of the lake and is based on plants present.
LakeSPI history for this lake
LakeSPI (Lake Submerged Plant Indicators) is a method of characterising the ecological condition of lakes based on the composition of native and invasive plants growing in them. A higher LakeSPI percentage result is associated with better ecological health:
LakeSPI N/A LakeSPI {{spiData.details.Value}}% The overall LakeSPI score is calculated using a Native Condition Index ('good' plants) and an Invasive Impact Index (introduced, non-native plants):
Native Condition N/A Native Condition {{spiData.details.NativeIndex}}% Invasive Impact N/A Invasive Impact {{spiData.details.InvasiveIndex}}% NA A higher Native Condition value indicates better ecological condition, but a higher Invasive Impact value indicates invasive plants are negatively impacting native plant communities.
View a factsheet on LakeSPI for more information on these indicators.- LakeSPI
- Native Condition
- Invasive Impact
Showing:toLakeSPI history for Maori Lake (Back / West) - ŌtūwharekaiYearWhat is this graph showing me?
This graph is displaying the overall LakeSPI score over time. The results denote the ecological condition of the lake.
EXCELLENTExcellent ecological health. A LakeSPI score of 75-100%.HIGHHigh ecological health. A LakeSPI score of 50-75%.MODERATEModerate ecological health. A LakeSPI score of 20-50%.POORPoor ecological health. A LakeSPI score of 0-20%.NON-VEGNon-vegetated. A LakeSPI score of 0% (there are no plants present).NO DATANo data available.LakeSPI history for Maori Lake (Back / West) - Ōtūwharekai data tableSample Date LakeSPI Status LakeSPI % Native Condition Index % Invasive Impact Index % 
NIWA LakeSPI is licensed under a Creative Commons Attribution-Non Commercial 3.0 New Zealand License 2012.
Visit the NIWA LakeSPI website.
LakeSPI information has been provided by NIWA.
