2040-AG33 202310 The Regulatory Plan and the Unified Agenda of Federal Regulatory and Deregulatory Actions 2040 Office of Water OW 2000 Environmental Protection Agency EPA Revisions to Establish the Sixth Unregulated Contaminant Monitoring Rule (UCMR 6) for Public Water Systems

The Safe Drinking Water Act (SDWA), as amended in 1996, requires that the EPA establish a program to monitor up to 30 unregulated contaminants every five years. EPA published the rule defining the fifth cycle of monitoring (UCMR 5) on December 27, 2021 (86 FR 73131). This upcoming action meets the SDWA requirement by establishing the terms for the next (sixth) cycle of monitoring and identifying the new unregulated contaminants to be monitored during the five-year UCMR 6 period of 2027-2031. Monitoring preparations are anticipated in 2027, with sample collection between 2028-2030 and reporting concluding in 2031.

]]> Substantive, Nonsignificant First Time Published in The Unified Agenda Long-Term Actions No No 40 CFR 141.35 40 CFR 141.40 42 U.S.C. 300f 42 U.S.C. 300j 42 U.S.C. 300g Statutory Final 12/31/2026 SDWA (Section 1445; USC 300j-4) requires EPA to issue a list of up to 30 unregulated contaminants to be monitored by public water systems every five years. The next cycle is 2027-2031. No NPRM 05/00/2025 Final Action 11/00/2026 No Federal Local State Tribal Undetermined No https://www.epa.gov/dwucmr/ No No Brenda Bowden 2040 Office of Water OW 513 569-7961 bowden.brenda@epa.gov Mail Code 140, 26 West Martin Luther King Drive, Cincinnati OH 45268