Q&A: NSF/ANSI 350 and 350-1: Onsite Water Reuse

  • Open What types of systems are included in the standards?

    The NSF/ANSI 350 and 350-1 standards apply to residential or commercial (non-industrial) onsite graywater and blackwater treatment systems that serve single or multiple buildings within the same property. Residential systems are defined as those that treat wastewater from a single residence, while commercial systems treat wastewater from multi-family dwellings and from businesses.

  • Open Where can onsite treated water be reused?

    Treated water meeting the requirements of NSF/ANSI 350 can be used for toilet and urinal flushing, irrigation, decorative fountains, car washing and other non-potable water applications.