营养污染物 | I | II | III | IV | V | 劣V |
TN/(mg/L) | ≤0.2 | 0.2~0.5 | 0.5~0.1 | 1.0~1.5 | 1.5~2.0 | ≥2.0 |
TP/(mg/L) | ≤0.02 | 0.02~0.1 | 0.1~0.2 | 0.2~0.3 | 0.3~0.4 | ≥0.4 |