4 - Stage Drinking Water Filter UV Ultraviolet Light Purifier for Bacteria Powerful four stage water filtration system. This system has an UV light which is excellent to kill harmful Bacteria, E Coli, Viruses Fungi, Algae and many other contaminants. The other stages remove Chlorine, Pesticides, Herbicides, Insecticides, Trihalomethanes, Benzene and many volatile organic compounds. Also Sediment, Bad Taste and Odors. Effectively eliminates many impurities from tap water to offer sparkling clean and great tasting water.