NSF/ANSI Standard 350: Certification for Water Reuse Treatment Systems
The industry standard for safe and sustainable water reuse.
NSF/ANSI 350 sets the benchmark for certifying water reuse treatment systems that process combined wastewater or greywater. This standard ensures systems meet strict health and safety requirements for non-potable water reuse applications.
What NSF/ANSI 350 covers
NSF verifies that all design and performance requirements are met and confirms through testing that treated water meets stringent quality criteria for its intended use. The standard establishes minimum material, design, construction, and performance requirements for onsite residential and commercial systems treating combined wastewater or greywater.
Why this standard matters
This innovative standard:
- Ensures water is treated to safe levels for non-potable reuse applications such as irrigation, toilet flushing and decorative fountains.
- Applies to any technology type capable of meeting requirements—no design limitations.
- Includes physical, chemical, and microbiological reduction requirements to protect public health and guarantee water quality.
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