Information  NSF/ANSI Standard 55, Class A certification.  This validated system carries a 40 mJ/cm2 UV dose at the alarm set-point as dictated by NSF/ANSI Standard 55 test protocol. System offer a 4-log reduction (99.99%) in bacteria, virus and protozoan cysts (Giardia lamblia and Cryptosporidium).  Applications include private wells, camp grounds, hotels, bottlers, aquaculture, hospitals, food, cottages, restaurants, breweries, water systems, laboratories, marine, pharmaceutical, dairies and many other applications.