Hands-free faucets may not be so germ-free

March 31, 2011 5:40:59 PM PDT
The hands-free faucets found in some public restrooms may not be as germ-free as some might think.

A new study at Johns Hopkins Hospital shows an increase of a particular kind of bacteria on half the water samples from the electronic faucets, compared to only 15 percent of the manual ones. Researchers think it is because complex valve systems on electronic faucets allow for more bacteria growth.

The study did not test for germs on the knobs of the manual faucets.