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Full Description

This Standard contains minimum requirements for residential wastewater treatment systems having rated treatment capacities between 1514 L/day (400 gal/day) and 5678 L/day (1500 gal/day). Management methods for the treated effluent discharged from residential wastewater treatment systems are not addressed by this Standard.
 

Document History

  1. NSF/ANSI 40-2023


    Residential Wastewater Treatment Systems

    • Most Recent
  2. NSF/ANSI 40-2022


    Residential Wastewater Treatment Systems

    • Historical Version
  3. NSF/ANSI 40-2020


    Residential Wastewater Treatment Systems

    • Historical Version
  4. NSF/ANSI 40-2019


    Residential Wastewater Treatment Systems

    • Historical Version
  5. NSF 40-2018


    Residential Wastewater Treatment Systems

    • Historical Version
  6. NSF 40-2013


    Residential Wastewater Treatment Systems

    • Historical Version
  7. NSF 40-2012


    Residential Wastewater Treatment Systems

    • Historical Version
  8. NSF 40-2010


    Residential Wastewater Treatment Systems

    • Historical Version
  9. NSF 40-2009

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    Residential Wastewater Treatment Systems

    • Historical Version
  10. NSF 40-2005


    Residential Wastewater Treatment Systems

    • Historical Version
  11. NSF 40-2004


    Residential Wastewater Treatment Systems

    • Historical Version
  12. NSF 40-2000


    Residential Wastewater Treatment Systems

    • Historical Version
  13. NSF 40-1999


    Residential Wastewater Treatment Systems

    • Historical Version