Comment submitted by U.S. Conference of Mayors et al.

Summary: The U.S. Conference of Mayors, National League of Cities, and National Association of Counties support the EPA's proposal to rescind regulatory determinations for four PFAS substances and to offer drinking water utilities a longer compliance timeframe for PFOA and PFOS. They argue that these actions provide necessary flexibility and cost-efficiency for local governments while urging the EPA to ensure the rules are legally sound and consider household rate impacts when granting exemptions.