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EPA/WATER RIN: 2040-AF19 Publication ID: Spring 2010 
Title: ●National Primary Drinking Water Regulations: Radionuclides(Section 610 Review) 
Abstract: On December 7, 2000 (65 FR 76708), EPA promulgated final revised and/or new national primary drinking water regulations (NPDWRs) for non-radon radionuclides as authorized by the Safe Drinking Water Act. In this action, referred to as the Radionuclides Rule, EPA promulgated maximum contaminant level goals (MCLGs), maximum contaminant levels (MCLs), monitoring, reporting, and public notification requirements for gross alpha particle activity, combined radium-226 and 228, beta particle and photon activity and uranium. The Radionuclides Rule became effective on December 8, 2003. EPA developed a Final Regulatory Flexibility Analysis for the Radionuclides Rule and took several steps to lessen the impacts on small entities (i.e., small systems). These steps included: (1) The selection of a less stringent MCL for uranium, (2) a reduction in the overall monitoring frequencies for systems with radionuclides levels less than the MCL, (3) allowance of grandfathered data and State monitoring discretion for determining the initial monitoring baseline, and (4) the exclusion of non-transient, non-community water systems from the radionuclides regulations. EPA continues to view the NPDWRs for radionuclides as important components to ensuring and protecting the health of consumers served by public drinking water systems and intends to continue to require compliance with these NPDWRs. While EPA has taken steps to evaluate and mitigate impacts on small entities as part of the promulgation of the Radonuclides Rule, this new entry in the regulatory agenda announces that EPA will review the NPDWRs for radionuclides pursuant to section 610 of the Regulatory Flexibility Act (5 U.S.C. 610). As part of this review, EPA will consider and solicit comments on the following factors: (1) The continued need for the rule; (2) the nature of complaints or comments received concerning the rule; (3) the complexity of the rule; (4) the extent to which the rule overlaps, duplicates, or conflicts with other Federal, State, or local government rules; and (5) the degree to which the technology, economic conditions or other factors have changed in the area affected by the rule. Comments must be received within 90 days of this notice. In submitting comments, please reference Docket ID EPA-HQ-OW-2010-0166 and follow the instructions provided in the preamble to this issue of the Regulatory Agenda. This docket can be accessed at 
Agency: Environmental Protection Agency(EPA)  Priority: Info./Admin./Other 
RIN Status: First time published in the Unified Agenda Agenda Stage of Rulemaking: Prerule Stage 
Major: No  Unfunded Mandates: No 
RFA Section 610 Review: Section 610 Review 
CFR Citation: None     (To search for a specific CFR, visit the Code of Federal Regulations.)
Legal Authority: 5 USC 610   
Legal Deadline:  None
Action Date FR Cite
Final Rule  12/07/2000  65 FR 76708   
Begin Review  04/00/2010    
End Comment Period  07/00/2010    
End Review  12/00/2010    
Additional Information: SAN No. 5445; Related to RIN 2040-AC98; EPA Docket information: EPA-HQ-OW-2010-0166.
Regulatory Flexibility Analysis Required: No  Government Levels Affected: None 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: Yes 
Agency Contact:
Sandy Evalenko
Environmental Protection Agency
Washington, DC 20460
Phone:202 564-0264
Fax:202 564-0194

Stephanie Flaharty
Environmental Protection Agency
Environmental Protection Agency, Water, Mail Code 4601M,
Washington, DC 20460
Phone:202 564-5072

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