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EPA/WATER RIN: 2040-AC98 Publication ID: Spring 2001 
Title: National Primary Drinking Water Regulations: Radium, Uranium, Alpha, Beta and Photon Emitters 
Abstract: Standards for radium, alpha, and beta and photon emitters were promulgated in 1976. They were included in the list of 83 contaminants for regulation (because they had MCLs but not MCLGs), along with uranium in the 1986 Safe Drinking Water Act (SDWA) Amendments. Regulations for uranium, radium 226, radium 228, and gross alpha and beta particles were proposed on July 18, 1991. The 1991 proposal was to raise the standard, of 20 pCi/l, and proposed uranium at 20 ug/l. 
Agency: Environmental Protection Agency(EPA)  Priority: Other Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Completed Actions 
Major: No  Unfunded Mandates: No 
CFR Citation: 40 CFR 141    40 CFR 142   
Legal Authority: 42 USC 300f et seq    SDWA 1412   
Legal Deadline:  None
Timetable:
Action Date FR Cite
ANPRM  09/30/1986  51 FR 34836   
NPRM  07/18/1991  56 FR 33050   
NODA  04/21/2000  65 FR 21576   
Final Action  12/07/2000  65 FR 76708   
Additional Information: SAN No. 3992
Regulatory Flexibility Analysis Required: Yes  Government Levels Affected: Federal, Local, State, Tribal 
Small Entities Affected: Businesses, Governmental Jurisdictions, Organizations  Federalism: No 
Included in the Regulatory Plan: No 
Sectors Affected: 22131 Water Supply and Irrigation Systems 
Agency Contact:
David Huber
Environmental Protection Agency
Water
4607,
Washington, DC 20460
Phone:202 260-9566
Fax:202 260-3762
Email: huber.david@epa.gov

William Labiosa
Environmental Protection Agency
Water
4607,
Washington, DC 20460
Phone:202 260-4835
Fax:202 260-3762
Email: labiosa.william@epa.gov