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Journal of Chemistry
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2021
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Article
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Tab 1
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Research Article
Hydrochemistry and Entropy-Based Groundwater Quality Assessment in the Suining Area, Southwestern China
Table 1
Classification criteria of water quality based on EWQI, according to reference [
25
].
Rank
EWQI
Water quality
1
<50
Excellent
2
50–100
Good
3
100–150
Medium
4
150–200
Poor
5
>200
Extremely poor