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. 2019 Apr 29;6:1021–1029. doi: 10.1016/j.mex.2019.04.027

Table 4.

Water quality classification ranges and types of water based on DWQI values [17].

DWQI value Class Explanation
<50 Excellent Good for human health
50–100 Good Fit for human consumption
100–200 Poor Water not in good condition
200–300 Very poor Need attention before use
>300 Inappropriate Need too much attention