[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: 40CFR141.29] [Page 419-420] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 141_NATIONAL PRIMARY DRINKING WATER REGULATIONS--Table of Contents Subpart C_Monitoring and Analytical Requirements Sec. 141.29 Monitoring of consecutive public water systems. When a public water system supplies water to one or more other public water systems, the State may modify the monitoring requirements imposed by this part to the extent that the interconnection of the systems justifies treating them as a single system for monitoring purposes. Any modified [[Page 420]] monitoring shall be conducted pursuant to a schedule specified by the State and concurred in by the Administrator of the U.S. Environmental Protection Agency.