about UV
Over 100 years ago German scientists discovered that the top surface of lake-water was sterile when exposed to sunlight. Investigation led to the discovery of Ultraviolet light. Situated in the electro-magnetic spectrum between X-rays and visible light, Ultraviolet (UV) light has many beneficial properties. UV light is split into four main categories, UV-A, UV-B, UV-C and Vacuum UV. The area between 240 and 280 nanometres (nm) is UV-C, commonly known as the germicidal region.
UVC light has the ability to cause permanent damage to a wide variety of nuisance microorganisms in water. Certain species of microorganisms have now developed or adapted immunity to traditional disinfection techniques such as chlorine; Cryptosporidium Parvuum is one such "emerging" pathogen that chlorine cannot kill. An outbreak of Cryptosporidium in Milwaukee in 1993 made 400,000 people ill and hospitalized 4400 people.
UV light is a physical , non intrusive method of ensuring that organisms present in water, are unable to replicate, and hence remain inert. Properly sized UV systems can also be used to reduce chloramines in pool water. Additionally UV does not effect the taste, color, or ph of the water being disinfected.
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