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Key Points 2009-2010

Of the 28 lakes monitored during 2009-2010:

· 4 were graded as oligotrophic (low nutrients)

· 13 were mesotrophic (medium nutrients)

· 7 were eutrophic (high nutrients)

· 4 supertrophic (very high nutrients)

· 2 lakes have declined in water quality since 2008-09 – Ngatu (mesotrophic to eutrophic) and Kai-Iwi (oligotrophic to mesotrophic)

· 9 lakes have improved water quality since 2008-09

· Changes are most likely due to natural nutrient cycles in each lake, and as a result of the drought experienced summer 2009-2010

Map showing Trophic Status.