All chemicals added to the drinking water stream in the production and treatment process are National Sanitary Foundation (NSF) approved for potable (drinking) water use. In addition to chlorine, Cayman Water adds a food grade sodium hydroxide (caustic soda) to adjust the pH of the water to just above 7, and it adds a zinc orthophosphate corrosion inhibitor to mitigate the corrosive effects of the water.
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