Nov 16, 2011

NSF Intl. Publishes First American National Standard for Water Reuse Systems

Certified onsite water reuse technologies can reduce impact on environment, water costs

NSF Intl. announced it published the first American national standard for commercial and residential onsite water reuse treatment systems, NSF/ANSI 350: Onsite Residential and Commercial Reuse Treatment Systems. The new standard complements NSF’s expanding environmental standards and sustainable product standards, which help establish criteria for and clear methods of evaluating environmental and sustainable product claims.

NSF/ANSI 350: Onsite Residential and Commercial Reuse Treatment Systems establishes criteria to improve awareness and acceptance of water reuse technologies that reduce impacts on the environment, municipal water and wastewater treatment facilities, and energy costs. According to the American Water Works Assn. (AWWA), 84% of residential water is used in non-potable water applications such as lawn irrigation, laundry and toilet flushing. Residential and commercial builders, architects and regulators are turning to onsite wastewater reuse systems as a solution to increasing water scarcity and energy costs associated with the treatment and distribution of municipal water and wastewater.

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 its Leadership in Energy and Environmental Design (LEED) building design and construction draft standard for 2012. Products certified to NSF/ANSI 350 also could satisfy greywater use strategies under the National Assn. of Home Builders (NAHB) National Green Building Certification program as an innovative practice.

NSF developed the standard for evaluating onsite water reuse technologies to ensure systems properly treat wastewater generated from domestic activities and all combined wastewater 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 can be used for restricted indoor water use, such as toilet and urinal flushing, and outdoor unrestricted water use, such as lawn irrigation.

“Certification to NSF/ANSI 350 positions onsite water reuse technologies as a viable solution to increasingly overburdened water and wastewater treatment facilities, water scarcity and increasing costs associated with energy and water use,” said Tom Bruursema, general manager of NSF Sustainability. “Innovative clean technology manufacturers … can now demonstrate the acceptability and effectiveness of their products, helping these technologies to be adopted more quickly into the marketplace.”