In honour of NSF International’s recent release of NSF/ANSI 55-2019, we’re sharing what these certification standards are all about! Our very own Dr. Ashkan Babaie, Director of Advanced Engineering, was a key member of the International Task Group in the development of the 2019 version of the NSF/ANSI 55 standard, which now includes test protocols for systems using alternate UVC sources such as LEDs in addition to traditional UV mercury lamps.

But what does it really mean to have NSF/ANSI 55 certification, and why does it matter?

Safe, clean water is free of microbial contaminants. To attain this level of purity, our products undergo extensive in-house testing by our engineers and scientists. After the testing on our side is complete, our products get certified against NSF/ANSI 55 standards by certifiers accredited by the American National Standards Institute (ANSI) and the Standards Council of Canada (SCC).

 Dr. Ashkan Bababie, Director of Advanced Engineering, holding an Eco 1.5 and an Eco NX-Silver

Dr. Ashkan Bababie, Director of Advanced Engineering, holding an Eco 1.5 and an Eco NX-Silver

Which Acuva Products hold NSF/ANSI 55?

Acuva’s Eco NX-Silver is currently the only LED-based product world-wide which holds NSF/ANSI 55-Class B for microbial performance in addition to material safety and structural integrity as per NSF/ANSI 55-2019. Previously, Acuva Eco 1.5 was also the first ever product to hold NSF/ANSI 55-Class B as per NSF/ANSI-2018. In addition, our Strike modules for OEMs hold NSF/ANSI 55 for material safety and structural integrity since June 2019.


What is NSF/ANSI 55?

NSF/ANSI 55 tests UV-Water treatment equipment against 3 main criteria:

1. Microbial Disinfection Performance: Validating the microbial disinfection effectiveness by identifying the system’s performance as Class A or Class B

2. Material safety for drinking water: Ensuring the material used in the UV water purifier doesn’t leach heavy metals, or other contaminants which are known to be unsafe for human health

3. Structural Integrity: Assuring the UV Water Purifier can withhold hydraulic pressures under sudden pressure jumps or continuous pressure cycling happening in plumbing system under regular use.


What is new in 2019 version of NSF/ANSI 55?

The 2019 version of the standard is different only in terms of testing protocols for Microbial Disinfection Performance (No. 1) and hasn’t changed in terms of Material Safety and Structural Integrity (No. 2 and No.3). In terms of Disinfection Performance, testing protocols for LED-based systems are now included and the microbial performance assessment has changed from a dose-based assessment to a log-reduction basis.


What is the Difference between Standard and Certification?

NSF International is an independent non-for-profit organization that develops safety standards, including NSF/ANSI 55 for protection of public health. When it comes to certification against NSF Standards there are approximately 6 accredited certifiers in North America such as IAPMO, WQA, NSF, CSA which provide certification against public domain NSF/ANSI standards. Each accredited certifier provides equivalent compliance to regulations and equivalent product assurance and acceptance for buyers. Acuva currently performs product certification against NSF/ANSI 55 and NSF/ANSI 372 standards with IAPMO.


If you’d like to know more, please send your questions to


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