Following four years in development, NSF/ANSI Standard 350 was published in 2011. Created in a consensus process with leading industry manufacturers, users and public health officials, the standard establishes minimum material, design and construction, and performance requirements for onsite graywater, residential and commercial water treatment systems.

This innovative standard:

• Assures water is treated to safe level for specific reuse, non-potable applications like surface or subsurface irrigation, toilet/urinal flushing, decorative fountains, etc.
• Applies to any technology type capable of meeting the requirements, without limitations on system design or treatment capacity
• Includes physical, chemical and microbiological reduction requirements to assure public health safety and suitable reuse