The U.S. Environmental Protection Agency (EPA) is evaluating whether to regulate certain unregulated drinking water contaminants listed on the fifth Contaminant Candidate List (CCL 5). In this publication, it provides preliminary determinations not to regulate nine specific contaminants, as they do not appear to occur in public water systems at levels of public health concern. For five additional contaminants, the EPA is continuing its evaluation and hasn't reached a decision yet. The EPA is requesting public comments on its preliminary findings and analysis before finalizing its regulatory determinations.
Simple Explanation
The EPA is deciding if certain things in drinking water are safe or not, and they want people to tell them what they think before they decide for sure.