Ultraviolet water purification lamps produce UV-C or “germicidal UV, radiation of much greater intensity than sunlight. Almost all of a UV lamp’s output is concentrated in the 254 nanometers (nm) region in order to take full advantage of the germicidal properties of this wavelength. UV light generally has no impact on chlorine, VOCs, heavy metals, and other chemical contaminants. Nevertheless, it is probably the most cost effective and efficient technology available to homeowners to eliminate a wide range of biological contaminants from their water supply. Recent testing has also shown that UV can be effective at destroying certain VOC’s, although we would not specifically recommend the technology for VOC reduction. It does not alter the taste, pH, or other properties of the water Accordingly, in addition to producing safe drinking water.