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EPA/WATER RIN: 2040-AA94 Publication ID: Fall 2005 
Title: National Primary Drinking Water Regulations: Radon 
Abstract: The Radon rule complies with the Safe Drinking Water Act (SDWA) requirement to reduce exposure to radon in homes. In 1999, EPA proposed regulations for radon which provide flexibility in how to manage the health risks from radon in drinking water. The proposal was based on the unique framework in the 1996 SDWA. The proposed regulation would provide for either a maximum contaminant level (MCL), or an alternative maximum contaminant level (AMCL) with a multimedia mitigation (MMM) program to address radon in indoor air. Systems would also be able to develop a State approved MMM program in the absence of a State program. Under the proposal, public water systems in States that adopted qualifying MMM programs would be subject to the AMCL, while those in States that did not adopt such programs would be subject to the MCL. 
Agency: Environmental Protection Agency(EPA)  Priority: Economically Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Long-Term Actions 
Major: Yes  Unfunded Mandates: State, local, or tribal governments 
CFR Citation: 40 CFR 141    40 CFR 142   
Legal Authority: 42 USC 300f et seq"SDWA1412"   
Legal Deadline:
Action Source Description Date
NPRM  Statutory    08/06/1999 
Final  Statutory    11/02/2000 
Other  Statutory  Publish radon health risk reduction and cost analysis.  02/06/1999 
Timetable:
Action Date FR Cite
ANPRM-  09/30/1986  51 FR 34836   
NPRM original-  07/18/1991  56 FR 33050   
Notice 99-  02/26/1999  64 FR 9560   
NPRM-  11/02/1999  64 FR 59246   
Final Action-  12/00/2007    
Additional Information: SAN No. 2281;
Regulatory Flexibility Analysis Required: Yes  Government Levels Affected: Federal, Local, State, Tribal 
Small Entities Affected: Businesses, Governmental Jurisdictions  Federalism: Yes 
Included in the Regulatory Plan: No 
Sectors Affected: 22131 Water Supply and Irrigation Systems 
Agency Contact:
Rebecca Allen
Environmental Protection Agency
Water
4607M,
Washington, DC 20460
Phone:202 564-4689
Fax:202 564-3760
Email: Allen.Rebeccak@epamail.epa.gov

Ann Codrington
Environmental Protection Agency
Water
4607M,
Washington, DC 20460
Phone:202 564-4688
Fax:202 564-3760
Email: Codrington.Ann@epamail.epa.gov