Waiting for the hot water to come through the pipes to wash your hands is wasteful of water and energy and as it turns out not necessary to get your hands clean.

In its medical literature, the Food and Drug Administration states that hot water comfortable enough for washing hands is not hot enough to kill bacteria, but is more effective than cold water because it removes oils from the hand that can harbor bacteria.

But in a 2005 report in the Journal of Occupational and Environmental Medicine, scientists with the Joint Bank Group/Fund Health Services Department pointed out that in studies in which subjects had their hands contaminated, and then were instructed to wash and rinse with soap for 25 seconds using water with temperatures ranging from 40 degrees Fahrenheit to 120 degrees, the various temperatures had no effect on transient or resident bacterial reduction.

Save some heating energy and water and turn down the hot water faucet.


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