Issue 30: To include a Microcystin-LR as a Chemical Reduction claim under 7.2.1 - Organic chemical reduction testing into NSF/ANSI Standard 53: Drinking Water Treatment Units - Health Effects. Sections having modification made are: 7 - Mandatory Testing for Elective Claims; and 8 - Instruction and Information. An analytical method for Microcystin-LR detection has also been appended as Annex E.
