Trophic level | Nutrients enrichment | Total Phosphorus (µg/l) | CHL-a (µg/l) | Water transparency (m) |
Oligotrophic | Low nourrished waters | ≤10 | ≤3 | ≥5 |
Oligo-mesotrophic | Moderately nourrished waters | 7 - 13 | 2.5 - 3.5 | 4 - 6 |
Mesotrophic | 10 - 30 | 3 - 8 | 2.5 - 5 | |
Meso-eutrophic | Well nourrished waters | 20 - 35 | 6.5 -10 | 2 - 3 |
Eutrophic | >30 | >8 | <2.5 |