What are the safe ways to reuse grey water on site? On site water reuse promises many economic and environmental benefits, but could cause health problems if done badly. The American standards agency, NSF, therefore released a useful standard for comprehensive evaluation of water reuse technologies, whether residential or commercial: NSF/ANSI 350.According to NSF, ” 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.”