Water from a well is more likely to be clean to drink as compared to the water from river.
Source water refers to bodies of water that contribute water to public drinking water sources and private wells (such as rivers, streams, lakes, reservoirs, springs, and ground water).
Water which came from underground sources are clean and well to drink as no impurities were present in that, whereas the water from rivers are not that much of clean as many human activities make them impure.
Hence water from well is clean to drink.
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