Comment submitted by National Association of Water Companies (NAWC)

Summary: The National Association of Water Companies (NAWC) supports the EPA's efforts to identify contaminants for the Sixth Drinking Water Contaminant Candidate List (CCL 6) but urges a risk-based approach. They advocate for clear definitions of broad categories like microplastics and pharmaceuticals, the prioritization of validated analytical methods, and consideration of the economic and operational impacts on water utilities.