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Study: Effective Handwashing Does Not Require Hot Water

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Handwashing is a hot topic in the world of food safety. Lack of proper handwashing procedures in food service and other sectors can lead to the spread of foodborne illness. Are current handwashing rules in need of updating? A new study suggests it may be time.

According to research released by Rutgers University, cool water is apparently just as effective as hot water in terms of washing away harmful bacteria. For the study, 21 volunteers had their hands covered with a harmless bacteria multiple times over a 6 month period. Each time, the volunteers were instructed to wash their hands at varying water temperatures—60 °, 79 ° or 100 °. They were also asked to use 0.5 ml, 1 ml or 2 ml volumes of soap.

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