Mention standards prescribed by BIS for quality of drinking water.
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There are many factors that you should think about when purifying water.
They should meet the standards prescribed by the organizations.
Some of the rules are the odor, pH, Taste, hardness, nitrate, copper, sulfate, arsenic, fecal coliform, E.coli, Alkalinity, Chloride, Cadmium, Copper.
These are some of the standards that should be there in allowed contents.
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