The Waterworks Standards provide criteria in the design, construction and operation of public water systems. NSF/ANSI Standard 60: Drinking Water Treatment Chemicals "
California Formally Adopts NSF/ANSI Standard 61
March 10, 2008
NSF International announced that the revised California Waterworks Standards, effective March 9, 2008, will now formally require certification for all drinking water treatment and distribution products used by public water systems.