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EPA/WATER RIN: 2040-AF49 Publication ID: Spring 2015 
Title: Unregulated Contaminant Monitoring Rule (UCMR 4) for Public Water Systems 

The Safe Drinking Water Act (SDWA), as amended in 1996, requires that the U.S. Environmental Protection Agency (EPA) establish criteria for a program to monitor not more than 30 unregulated contaminants every five years. EPA published the first Unregulated Contaminant Monitoring Rule (UCMR 1) in the Federal Register on September 17, 1999 (64 FR 50556), the second (UCMR 2) on January 7, 2007 (72 FR 367), and the third (UCMR 3) on May 2, 2012 (77 FR 26072). This action meets the SDWA requirement by establishing the terms for the next cycle of monitoring and identifying the new unregulated contaminants to be monitored during the UCMR 4 period of 2017-2021.

Agency: Environmental Protection Agency(EPA)  Priority: Substantive, Nonsignificant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: No  Unfunded Mandates: No 
CFR Citation: 40 CFR 141   
Legal Authority: 42 U.S.C. 300j-4   
Legal Deadline:
Action Source Description Date
Final  Statutory  Publication of UCMR 4 by early January 2017 supports the implementation needs within the 2017-2021 time frame (42 U.S.C.300j-4(a)(2))  12/31/2016 

Overall Description of Deadline: Statutory - May 2017

Action Date FR Cite
NPRM  10/00/2015 
Final Rule  01/00/2017 
Regulatory Flexibility Analysis Required: Undetermined  Government Levels Affected: Federal, Local, State, Tribal 
Federalism: Undetermined 
Included in the Regulatory Plan: No 
RIN Information URL:  
RIN Data Printed in the FR: No 
Agency Contact:
Brenda Parris
Environmental Protection Agency
Cincinnati, OH 45268
Phone:513 569-7961
Fax:513 569-7191

Jillian Toothman
Environmental Protection Agency
USEPA, 26 West Martin Luther King Jr. Drive, Mail Code 140,
Cincinnati, OH 45268
Phone:513 569-7393