[Code of Federal Regulations] [Title 40, Volume 22] [Revised as of July 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR141.55] [Page 437] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 141_NATIONAL PRIMARY DRINKING WATER REGULATIONS--Table of Contents Subpart F_Maximum Contaminant Level Goals and Maximum Residual Sec. 141.55 Maximum contaminant level goals for radionuclides. MCLGs for radionuclides are as indicated in the following table: ------------------------------------------------------------------------ Contaminant MCLG ------------------------------------------------------------------------ 1. Combined radium-226 and radium-228........ Zero. 2. Gross alpha particle activity (excluding Zero. radon and uranium). 3. Beta particle and photon radioactivity.... Zero. 4. Uranium................................... Zero. ------------------------------------------------------------------------ [65 FR 76748, Dec. 7, 2000]