WaterSurplus Announces NSF/ANSI/CAN 61 Certification For Its Revolutionary NanoStack Membrane Coating

WaterSurplus, a leader in sustainable water treatment, announces that its NanoStack Coating for RO membranes is now NSF/ANSI/CAN 61 certified. This prestigious designation indicates that this membrane coating has been independently tested and verified by IAPMO R&T, North America’s premier plumbing and mechanical product certification agency.

This is an important development for WaterSurplus, as its NanoStack technology is a core component of the company’s ImpactRO, a breakthrough brackish water reverse osmosis (BWRO) system that integrates multiple technological advancements into a single transformative platform.

“Our proprietary NanoStack membrane coating is engineered with a revolutionary, bio-inspired polymer that creates an ultra-hydrophilic surface, with fouling and scaling-resistant characteristics, allowing contaminants to wash away naturally during normal operation. These characteristics significantly extend the time between offline cleanings (CIPs), and when cleaning is required, NanoStack-coated membranes recover nearly all of their original performance. This results in higher uptime, longer membrane life, and more stable system operation when used in any BWRO system.

These fouling resistant characteristics are in stark contrast with the performance of conventional uncoated RO membrane elements that, in challenging, high-fouling conditions, tend to lose flux rapidly, require frequent cleanings – shortening membrane life, and often exhibit reduced performance even after offline cleanings.

Equipped with NanoStack coated membranes, ImpactRO can achieve up to 96% product recovery, along with up to a 4× reduction in membrane fouling, up to a 4× reduction in system downtime, and as much as double the membrane life compared to conventional multi-stage BWRO systems. It is exceptionally well-suited for rapidly fouling environments, high-recovery and high-efficiency applications, and water reuse or reclamation systems.

The NSF/ANSI/CAN 61 certification represents the internationally recognized benchmark for drinking water product safety and quality. IAPMO R&T’s certification program entails a comprehensive evaluation of materials, manufacturing practices, and product performance, supported by ongoing audits and periodic retesting to verify sustained compliance.

“NSF certification is an important milestone in the commercialization of NanoStack membranes and other of our technologies. With NSF certification of our NanoStack coating, WaterSurplus now owns two products―NanoStack membrane coating and OxiPlus high-flow, catalytic filter media―that have achieved NSF/ANSI/CAN 61 certified status,” said Dileep Agnihotri, Chief Technology Officer, WaterSurplus.

About WaterSurplus
WaterSurplus is a leader in sustainable water treatment, delivering high-performance solutions across industries. Since its founding in 1989, the company has led advancements in reverse osmosis systems, fouling-resistant membrane elements, PFAS treatment technologies, and pre-engineered filtration systems featuring proprietary catalytic media. WaterSurplus also offers an availability advantage through its ready-to-run rental fleet and extensive inventory of surplus water treatment equipment. Based in Loves Park, Illinois, WaterSurplus is a wholly owned subsidiary of Hawkins, Inc, a leading provider of water treatment and specialty ingredients. For more information, visit https://watersurplus.com/.