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Dec
4

NSF/ANSI Standard for Ultraviolet Microbiological Water Treatment Systems

Water Testing BlogBacteria

NSF/ANSI Standard 55:

“Overview: This standard establishes requirements for point-of-use (POU) and point-of-entry (POE) ultraviolet systems and includes two optional classifications. Class A systems (40,000 uwsec/cm2) are designed to disinfect and/or remove microorganisms from contaminated water, including bacteria and viruses, to a safe level. Class B systems (16,000 uw-sec/cm2) are designed for supplemental bactericidal treatment of public drinking water or other drinking water, which has been deemed acceptable by a local health agency.” (source)


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comments (4)

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  1. Water quality data lower payette river | Biogeochemical indicators of wetland water quality Says:
    January 21st, 2009 at 5:01 am

    [...] NSF/ANSI Standard for Ultraviolet Microbiological Water Treatment … [...]

  2. Water Testing at 9/11 Site in NYC? | Water Quality: Testing, Filters for, and Purification of Drinking, Ground and Pool Water Says:
    November 15th, 2010 at 8:25 pm

    [...] The Trojan UVMAX Pro10 Ultraviolet System and other larger models manufactured by Trojan UV work very well as add-ons to other water purification systems (i.e. reverse osmosis systems). Many of the models have undergone rigorous testing by independent laboratories and certified to NSF/ANSI STANDARD 055 — Ultraviolet Microbiological Water Treatment Systems. [...]

  3. What to Look for in a Home UV Water Treatment System | Water Quality: Testing, Filters for, and Purification of Drinking, Ground and Pool Water Says:
    January 20th, 2011 at 9:06 am

    [...] No simple answer exists for that question, but one thing we definitely suggest people look for… a UV water treatment system that bears the NSF Mark. Specifically, we suggest checking to see that any unit under consideration has certified to NSF Standard 55. [...]

  4. NSF/ANSI Standard 55 Class A or Class B for Home UV Water Treatment Systems? | Water Quality: Testing, Filters for, and Purification of Drinking, Ground and Pool Water Says:
    August 1st, 2011 at 9:05 am

    [...] than bore you by quoting the official definition of NSF/ANSI Standard 55 for Ultraviolet Microbiological Water Treatment Systems, we would like to point out a simple, yet often overlooked, truth that many people forget when [...]

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