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About This Item

 

Full Description

The purpose of this Standard is to establish minimum requirements for materials, design and construction, and performance of reverse osmosis (RO) drinking water treatment systems. This Standard also specifies the minimum product literature that manufacturers shall supply to authorized representatives and owners, as well as the minimum service-related obligations that manufacturers shall extend to system owners.

The point-of-use RO drinking water treatment 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 by this Standard are intended for reduction of total dissolved solids (TDS) and other contaminants specified herein. They may be chemical or particulate (including filterable cysts) in nature. It is recognized that a system may be effective in controlling one or more of these contaminants, but systems are not required to control all, however, TDS testing is required. 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. 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.
 

Document History

  1. NSF/ANSI 58-2022


    Reverse Osmosis Drinking Water Treatment Systems

    • Most Recent
  2. NSF/ANSI 58-2021 with Errata


    Reverse Osmosis Drinking Water Treatment Systems

    • Historical Version
  3. NSF/ANSI 58-2021


    Reverse Osmosis Drinking Water Treatment Systems

    • Historical Version
  4. NSF/ANSI 58-2020


    Reverse Osmosis Drinking Water Treatment Systems

    • Historical Version
  5. NSF/ANSI 58-2019


    Reverse Osmosis Drinking Water Treatment Systems

    • Historical Version
  6. NSF 58-2018

    👀currently
    viewing


    Reverse Osmosis Drinking Water Treatment Systems

    • Historical Version
  7. NSF 58-2017


    Reverse Osmosis Drinking Water Treatment Systems

    • Historical Version
  8. NSF 58-2016


    Reverse Osmosis Drinking Water Treatment Systems

    • Historical Version
  9. NSF 58-2015


    Reverse Osmosis Drinking Water Treatment Systems

    • Historical Version
  10. NSF 58-2014


    Reverse Osmosis Drinking Water Treatment Systems

    • Historical Version
  11. NSF 58-2013


    Reverse Osmosis Drinking Water Treatment Systems

    • Historical Version
  12. NSF 58-2012a


    Reverse Osmosis Drinking Water Treatment Systems

    • Historical Version
  13. NSF 58-2012


    Reverse Osmosis Drinking Water Treatment Systems

    • Historical Version
  14. NSF 58-2009


    Reverse Osmosis Drinking Water Treatment Systems, Includes Addendum (2011)

    • Historical Version
  15. NSF 58-2007


    Reverse Osmosis Drinking Water Treatment Systems

    • Historical Version
  16. NSF 58-2006


    Reverse Osmosis Drinking Water Treatment Systems

    • Historical Version
  17. NSF 58-2005


    Reverse Osmosis Drinking Water Treatment Systems

    • Historical Version
  18. NSF 58-2004


    Reverse Osmosis Drinking Water Treatment Systems

    • Historical Version
  19. NSF 58-2003e


    Reverse Osmosis Drinking Water Treatment Systems

    • Historical Version
  20. NSF 58-2003


    Reverse Osmosis Drinking Water Treatment Systems

    • Historical Version
  21. NSF 58-2002


    Reverse Osmosis Drinking Water Treatment Systems

    • Historical Version
  22. NSF 58-2001


    Reverse Osmosis Drinking Water Treatment Systems

    • Historical Version
  23. NSF 58-2000a


    Reverse Osmosis Drinking Water Treatment Systems

    • Historical Version