[Code of Federal Regulations] [Title 40, Volume 19] [Revised as of July 1, 2002] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR141.15] [Page 345] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 141--NATIONAL PRIMARY DRINKING WATER REGULATIONS--Table of Contents Subpart B--Maximum Contaminant Levels Sec. 141.15 Maximum contaminant levels for radium-226, radium-228, and gross alpha particle radioactivity in community water systems. The following are the maximum contaminant levels for radium-226, radium-228, and gross alpha particle radioactivity: (a) Combined radium-226 and radium-228--5 pCi/1. (b) Gross alpha particle activity (including radium-226 but excluding radon and uranium)--15 pCi/1. [41 FR 28404, July 9, 1976] Effective Date Note: At 65 FR 76745, Dec. 7, 2000, Sec. 141.15 was removed, effective Dec. 8, 2003.