Onsite Residential and Commercial Water Reuse Systems
Innovative product designers, engineers, and manufacturers have begun developing onsite wastewater treatment technologies to treat and reuse wastewater. These decentralized treatment systems will offer a sustainable, energy-efficient, and practical solution for protecting our water supply.
Some feel uncertain and skeptical since these newer technologies are not widely known as an alternative to discharge-only systems. To help address the uncertainty and skepticism about these reuse systems, NSF/ANSI Standard 350: Onsite Residential and Commercial Water Reuse Treatment Systems was developed. This standard sets guidelines and requirements for treating onsite wastewater for reuse applications and methods to meet Log Reduction Targets (LRTs) to yield credits for viruses, bacteria, and protozoan removal. This is the first standard to comprehensively evaluate wastewater reuse technologies with water treatment quality criteria, public health initiatives, and environmental concerns in mind.
When certifying these types of technologies, NSF verifies that all design, construction, and performance requirements of the standard have been met through initial technical reviews, rigorous testing of influent /effluent, and inspection to ensure that the reused water meets stringent water quality criteria for its designated end uses.
How NSF Can Help You
What’s New with NSF
CELSIUS® Products Earn NSF Certified for Sport® Certification
August 20, 2026CELSIUS® has earned NSF Certified for Sport® certification for select products, including the CELSIUS VIBES line, reinforcing the brand’s commitment to quality, transparency and consumer trust.
Thomas Vyles Honored With 2026 Walter F. Snyder Environmental Health Award
August 19, 2026The award honors Walter F. Snyder, co-founder and first executive director of NSF, and pioneers whose work advances environmental and public health.
NSF Hosts First External Review Panel for ‘NSF/KWTC 555’ with Key Asian Water Authorities
August 3, 2026Joint standard development gains momentum to enhance confidence in Asia’s water industry and advance drinking water safety.
NSF Achieves European Accreditation for Drinking Water Product Certification Ahead of 2027 EU Deadline
July 22, 2026The ISO/IEC 17065 accreditation from BELAC complements NSF’s testing capacity, enabling end-to-end support for EU Drinking Water Directive (DWD) readiness ahead of the January 2027 deadline.