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Fresh water Lake water quality
Current trophic (nutrient) level
Trophic level of 134 monitored lakes
The map shows the locations of 134 monitored New Zealand lakes colour coded according to their most recent (to 2005) trophic status. The Trophic Level Index (TLI) includes six categories from microtrophic (very low nutrient levels) to hypertrophic (very high nutrient levels).
Most lakes in the nutrient-enriched trophic categories are in the north of the North Island or the lowlands of the South Island while the least nutrient enriched lakes are most commonly found in high country of both islands (eg, Taupo and the Southern Lakes).
The bar graph shows the number of the lakes in each trophic category.
Tropic level of 134 monitored lakes
| Number of lakes |
|
|---|---|
Hypertrophic |
18 |
Supertrophic |
13 |
Eutrophic |
44 |
Mesotrophic |
21 |
Oligotrophic |
25 |
Microtrophic |
13 |
Data source: Ministry for the Environment.
This information has come from the latest state of the environment report, Environment New Zealand 2007.
Return to the trophic level index for lakes page
Last updated: December 2007
