Water quality of lakes and rivers of Upper Waitaki highlighted
... monitoring results showed that five lakes in the zone have not met the Trophic Level Index (TLI) set in the Canterbury Land and Water Regional Plan, although results in several lakes are likely...
https://www.ecan.govt.nz/get-involved/news-and-events/zone-news/upper-waitaki/water-quality-of-lakes-and-rivers-of-upper-waitaki-highlighted