ANN ARBOR, MICH.—NSF International, a global public health and environmental organization, has published the first American national standard for commercial and residential on-site water reuse treatment systems, NSF/ANSI 350. The new standard complements NSF’s expanding scope of environmental standards and sustainable product standards, which help establish criteria for and clear methods of evaluating environmental and sustainable product claims.
Certifying a water reuse system to NSF/ANSI 350 also satisfies requirements for leading green building programs. The U.S. Green Building Council has included reference to NSF/ANSI 350 in their LEED (Leadership in Energy and Environmental Design) Building Design & Construction 2012 Draft Standard. Products certified to NSF/ANSI 350 also could satisfy graywater use strategies under the National Association of Home Builders (NAHB) National Green Building Certification program as an innovative practice.
NSF developed this American national standard for evaluating on-site water reuse technologies to ensure the systems properly treat graywater (i.e. wastewater generated from activities such as laundry and bathing) and combined wastewater (i.e. all sources of wastewater generated within a residence or building) for reuse in non-potable applications. NSF/ANSI 350 establishes materials, design and construction, and performance requirements for onsite residential and commercial water reuse treatment systems and sets water quality requirements for the reduction of chemical and microbiological contaminants for non-potable water use. Treated wastewater (i.e. treated effluent) can be used for restricted indoor water use, such as toilet and urinal flushing, and outdoor unrestricted water use, such as lawn irrigation.
Visit NSF’s website to learn more about the NSF/ANSI 350 testing and certification program.