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Table 1

Evaluation standard of TP from environmental quality standards for surface water (GB3838-2002) in China

Water quality classificationTP (mg/L)
Grade I ≤0.02 (lake and reservoir 0.01) 
Grade II ≤0.1 (lake and reservoir 0.025) 
Grade III ≤0.2 (lake and reservoir 0.05) 
Grade IV ≤0.3 (lake and reservoir 0.1) 
Grade V ≤0.4 (lake and reservoir 0.2) 
Water quality classificationTP (mg/L)
Grade I ≤0.02 (lake and reservoir 0.01) 
Grade II ≤0.1 (lake and reservoir 0.025) 
Grade III ≤0.2 (lake and reservoir 0.05) 
Grade IV ≤0.3 (lake and reservoir 0.1) 
Grade V ≤0.4 (lake and reservoir 0.2) 
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