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Do ultraviolet rays really kill bacteria?

April 26, 2017bacteria kill Rays ultraviolet

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Do ultraviolet rays really kill bacteria?

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Ultraviolet treatment is an international, time tested technology for water purification. Ultraviolet rays of 253.7 Nanometers wavelength damage the DNA of bacteria leading to cell death. If water is kept in contact with ultraviolet rays of the above specified intensity for a certain contact time, then all water-borne disease-causing bacteria and virus will be inactivated.