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Table 2

Classification of water quality index (Li et al. 2010)

RankEWQIWater quality
< 50 Excellent 
50–100 Good 
100–150 Average 
150–200 Poor 
>200 Extremely poor 
RankEWQIWater quality
< 50 Excellent 
50–100 Good 
100–150 Average 
150–200 Poor 
>200 Extremely poor 
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