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The burden values of N and P in various eutrophicated water
| Eutrophic status | TP (µg/L) | TN (µg/L) | Primary productivity | TNI | References |
| Oligotropic water | 5~10 | 250~600 | 5~300 mg C/m2 | 0~30 | Likens et al.(1977); Cheng and Li (2006); Richardson et al.(2007) |
| Moderately eutrophic | 10~30 | 500~1100 | 1000 mg C/(m2·d) | 31~60 | |
| Eutrophic | 30~100 | 1000~2000 | − | 61~100 | |
| Hypereutropic | >100 | >2000 | − | >100 |
TN: Total nitrogen; TP: Total phosphorus, TNI: Total nutrient status index
