Historical
NSF/ANSI 42-2002e
[Historical Standard] Drinking Water Treatment Units - Aesthetic Effects
This document contains exactly the same information as ANSI/NSF 42 - 2002 and both addendums from 2002, but it has been reformatted per NSF's lab personnel to make it more user friendly. If you have these three documents, there is no need to purchase this document unless you want the user-friendly version. The point-of-use and point-of-entry systems addressed by this Standard are designed to be used for the reduction of specific substances that may be present in drinking water (public or private) considered to be microbiologically safe and of known quality. Systems covered under this Standard are intended to reduce substances affecting the aesthetic quality of the water or to add chemicals for scale control, or both. Substances may be soluble or particulate in nature at concentrations influencing public acceptance of the drinking water. It is recognized that a system may be effective in controlling one or more of these substances but is not required to control all. Systems with components or functions covered under other NSF or NSF/ANSI standards or criteria shall comply with those applicable requirements.
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NSF International [nsf]
