Proposed revisions to NSF/ANSI 42: Drinking Water Treatment Units – Aesthetic Effects (42i109r1), NSF/ANSI 53: Drinking Water Treatment Units – Health Effects (53i130r1), and NSF/ANSI 401: Drinking Water Treatment Units – Emerging Compounds / Incidental Contaminants (401i22r1)
The proposed revision will harmonize the current operational cycles and sampling specified in NSF/ANSI 42, 53, and 401. |