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NSF 42

Drinking Water Treatment Units - Aesthetic Effects

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Organization: NSF
Publication Date: 1 April 2019
Status: active
Page Count: 102
scope:

The point-of-use (POU) and point-of-entry (POE) 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 address one or more of the following: reduce substances affecting the aesthetic quality of the water, add chemicals for scale control, or limit microbial growth in the system (bacteriostatic). Substances may be soluble or particulate in nature. 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 manufacturer claims that include components or functions covered under other NSF or NSF/ANSI Standards or Criteria shall conform to the applicable requirements therein. Filter systems covered by this Standard are not intended to be used with drinking water that is microbiologically unsafe or of unknown quality without adequate disinfection before or after the system.

NOTE - Systems that are compliant with NSF/ANSI 55 Class A or other standards that cover technologies to treat microbiologically unsafe water (e.g., US EPA Guide Standard and Protocol for Testing Microbiological Water Purifiers or NSF P231) are examples of demonstrating adequate disinfection before or after the system.

Purpose

It is the purpose of this Standard to establish minimum requirements for materials, design and construction, and performance of drinking water treatment systems that are designed to reduce specific aesthetic related (nonhealth effects) contaminants in public or private water supplies. This Standard also specifies the minimum product literature and labeling information that a manufacturer shall supply to authorized representatives and system owners as well as the minimum service related obligations that the manufacturer shall extend to system owners.

Document History

NSF 42
April 1, 2019
Drinking Water Treatment Units - Aesthetic Effects
The point-of-use (POU) and point-of-entry (POE) 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...
July 31, 2018
Drinking Water Treatment Units - Aesthetic Effects
The point-of-use (POU) and point-of-entry (POE) 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...
April 11, 2017
Drinking Water Treatment Units - Aesthetic Effects
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)...
August 14, 2016
Drinking Water Treatment Units - Aesthetic Effects
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)...
May 11, 2015
Drinking Water Treatment Units - Aesthetic Effects
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)...
October 16, 2014
Drinking Water Treatment Units - Aesthetic Effects
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)...
June 11, 2013
Drinking Water Treatment Units - Aesthetic Effects
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)...
December 5, 2012
Drinking Water Treatment Units - Aesthetic Effects
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)...
February 29, 2012
Drinking Water Treatment Units - Aesthetic Effects
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)...
February 19, 2011
Drinking Water Treatment Units - Aesthetic Effects
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)...
August 27, 2009
Drinking Water Treatment Units - Aesthetic Effects
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)...
March 20, 2008
Drinking Water Treatment Units - Aesthetic Effects
A description is not available for this item.
October 22, 2007
Drinking water treatment units – Aesthetic effects
A description is not available for this item.
July 11, 2007
Drinking water treatment units – Aesthetic effects
A description is not available for this item.
April 4, 2005
Drinking water treatment units Aesthetic effects
A description is not available for this item.
42
June 20, 2002
Drinking Water Treatment Units - Aesthetic Effects
A description is not available for this item.
42
June 20, 2002
Drinking Water Treatment Units - Aesthetic Effects
A description is not available for this item.
January 28, 2002
Drinking Water Treatment Units - Aesthetic Effects
A description is not available for this item.
January 28, 2002
Drinking Water Treatment Units - Aesthetic Effects
A description is not available for this item.
January 28, 2002
Drinking Water Treatment Units - Aesthetic Effects
A description is not available for this item.
February 28, 2001
Drinking Water Treatment Units - Aesthetic Effects
A description is not available for this item.
January 1, 2000
Drinking Water Treatment Units - Aesthetic Effects
A description is not available for this item.
42
September 1, 1999
Drinking Water Treatment Units - Aesthetic Effects
A description is not available for this item.
42
November 1, 1998
Drinking Water Treatment Units - Aesthetic Effects
A description is not available for this item.
September 1, 1997
Drinking Water Treatment Units - Aesthetic Effects
A description is not available for this item.

References

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