Table 3.
Selected samples of water eutrophication occurrence in lake, reservoir, estuary and river in the world
| Water body | Nutrient (N, P) concentrations | Phytoplankton biomass | History of eutrophication | References |
| Erie Lake, USA | TP: 115 μg/L | Chlorophyll a: 58 μg/L | Blu-green algae bloom between 1965 and 1979; Declined quality from 1995 | Reutter, 1989; Maggie, 2004 |
| Okeechobee Lake, Florida, USA | TP: 50~100 μg/L | N and P are limitors for phytoplankton | Eutrophic at present | Schelske, 1989 |
| City Park Lake, Louisiana, USA | TN: 682 μg/L, TP: 330 μg/L | Chlorophyll a: 35.1 μg/L | Eutrophic (2000~2001) | Ruley and Rusch, 2002 |
| Lugano Lake | TP: 140 μg/L | Phytoplankton dry weight: 7~16 g/m2 | Strongly eutrophic from 1960s | Barbieri and Simona, 2001 |
| Danish lakes | TN: 2.4 mg/L, TP: 0.37 mg/L | Chlorophyll a: 73 μg/L | Highly eutrophic | Jeppesen et al., 1999 |
| Pamvotis Lake, Northwest Greece | TP: 0.11 μg/L, NH4+: 0.25 mg N/L, NO3−: 0.56 mg N/L | − | Cultural eutrophication over the past 40 years; Eutrophication at present | Romero et al., 2002 |
| Berg River, South Africa | TN: 217 mg/L, TP: 70 mg/L | − | Hypertrophic | de Villiers, 2007 |
| Chivero Lake, Zimbabwe | TN: 0.3~8.4 mg/L, TP: 1.01~5.01 mg/L | Chlorophyll a: 18.02~22.48 μg/L | Highly eutrophic since 1980s | Nhapi, 2004; Ndebele and Magadza, 2006 |
| Taihu Lake, China | TN: 2.56~4.5 mg/L, TP: 0.25~0.35 g/L | Algae biomass: 2.7~6.4 mg/L | Class I/II in the early 1960s; Class IV in the mid-1990s; Now, inferior Class V | Ye et al., 2007; Jin et al., 2006 |
| Songhua Lake, China | TN: 1.14~1.98 mg/L, TP: 0.038~0.102 mg/L | Algae density: 210.84×104~432.68×104 cell/L | Wang et al., 2004 | |
| Dianchi Lake, China | TN: 2.13~8.27 mg/L, TP: 0.33~0.59 mg/L | − | Class III in the early 1970s; Now, inferior Class V | Guo and Sun, 2002 |