Comment submitted by John Mueller
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Summary: John Mueller, a retired civil and control systems engineer, argues that sodium fluoride, sodium fluorosilicate, and fluorosilicic acid should be added to the Drinking Water Contaminant Candidate List (CCL-6). He cites a National Research Council study and subsequent research to argue that these substances pose health risks and require more restrictive regulatory limits.
The attached pdf file addresses the need for three chemical contaminants to be added for a Final CCL-6 listing of pharmaceutical chemical contaminants: sodium fluoride, sodium fluorosilicate, and fluorosilicic acid. Justification for action on these contaminants in drinking water is included in the attached file.