From: https://www.researchgate.net/profile/Olukayode-Ojo/publication/279416545/figure/tbl4/AS:670538078900225@1536880144216/TDS-level-of-drinking-water-for-consumer-ratings.png
From: https://www.researchgate.net/profile/Olukayode-Ojo/publication/279416545/figure/tbl4/AS:670538078900225@1536880144216/TDS-level-of-drinking-water-for-consumer-ratings.png
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