Scientific studies show that you need to scrub for 20 seconds to remove harmful germs and chemicals from your hands. If you wash for a shorter time, you will not remove as many germs. Make sure to scrub all areas of your hands, including your palms, backs of your hands, between your fingers, and under your fingernails.
Soap and water, worked into a lather, trap and remove germs and chemicals from hands. Wetting your hands with clean water before applying soap helps you get a better lather than applying soap to dry hands. A good lather forms pockets called micelles that trap and remove germs, harmful chemicals, and dirt from your hands.
Lathering with soap and scrubbing your hands for 20 seconds is important to this process because these actions physically destroy germs and remove germs and chemicals from your skin. When you rinse your hands, you wash the germs and chemicals down the drain.
CDC recommends turning off the faucet after wetting your hands to reduce water use. Then, turn it on again after you have washed them for 20 seconds, to rinse off the soap. If you are concerned about getting germs on your hands after you wash them, you can use a paper towel, your elbow, or another hands-free way to turn off the faucet.
Ensure you have easily accessible sinks; clean, running water; soap; and a way to dry hands, such as paper towels or a hand dryer.
Remind employees to wash their hands often with soap and water and provide accessible sinks, soap, water, and a way to dry their hands (e.g., paper towels, hand dryer). Put visual reminders, like signs or posters, in bathrooms or kitchen areas to remind employees to wash their hands. Provide other hygiene supplies such as tissues, no-touch/foot pedal trash cans, and hand sanitizer with at least 60% alcohol to keep your employees healthy.
No. CDC is not a regulatory agency, and therefore does not enforce compliance with handwashing recommendations. CDC has developed guidance on when and how to properly wash hands in community settings and when and how to clean hands in healthcare settings.
Your state or local health department may have handwashing requirements included in their health codes.
Scientists don't know if you would get a significant number of germs on your hands from touching a bathroom door handle. That's because it has not been specifically studied. If you're concerned about getting germs on your hands after you wash them, you can use a paper towel, your elbow, shirt, or another hands-free way to open the door.
CDC recommends always washing your hands after you use the toilet, whether it is in your home or somewhere else. Germs in feces (poop) can make you sick. These germs can get on your hands after you use the toilet or change a diaper. If you don't wash them off, you can pass them from person to person and make people sick. Make a habit of washing your hands after you use the toilet every time to reduce your chance of getting sick and spreading germs.
There is currently not enough scientific evidence to determine if using a clean towel or an air hand dryer to dry your hands is more effective at reducing germs on your hands. Both are effective ways to dry your hands. Germs spread more easily when hands are wet, so make sure to dry your hands completely, whatever method you use.
CDC recommends using a clean towel if you are using a towel to dry your hands. Reusable towels are a practical option at home. They should be changed when visibly dirty and before they develop mildew from remaining damp.
Use plain soap and water to wash your hands. Studies have not found any added health benefit from using antibacterial soap, other than for professionals in healthcare settings. In 2016, FDA banned over-the-counter sale of antibacterial soaps that contain certain ingredients because these soaps are no better than plain soap at preventing people from getting sick and their ingredients may not be safe for long-term, daily use. Some studies have shown that using antibacterial soap may contribute to antibiotic resistance.
Both bar and liquid soap work well to remove germs. Use plain soap in either bar or liquid form to wash your hands.
If you don't have soap and water, use a hand sanitizer with at least 60% alcohol. If you don't have hand sanitizer or soap, but do have water, rub your hands together under the water and dry them with a clean towel or air dry. Rubbing your hands under water will rinse some germs from your hands, even though it's not as effective as washing with soap.
Use your preferred water temperature – cold or warm – to wash your hands. Warm and cold water remove the same number of germs from your hands. The water helps create soap lather that removes germs from your skin when you wash your hands. Water itself does not usually kill germs; to kill germs, water would need to be hot enough to scald your hands.
Your hands can get germs on them if you place them in water that looks dirty, is contaminated (for example, during an emergency), or has germs in it from previous use, such as a basin with water used for bathing. That's why CDC recommends using clean, running water to wash your hands. If you don't have access to clean, running water, use hand sanitizer containing at least 60% alcohol to get rid of germs.
If you don't have clean, running water or hand sanitizer, you can still remove germs from your hands by washing with clear water. You can also make water safe to use by boiling, adding the proper amount of disinfectant such as a mild bleach solution, or filtering it. Use the cleanest water possible to wash your hands. Avoid using cloudy water or water that may be contaminated with harmful chemicals or toxins, such as toxins made by harmful algal blooms.
If my utility has issued a Boil Water Advisory, can I still use tap water to wash my hands?
In most cases, it is safe to wash your hands with soap and tap water during a Boil Water Advisory. Follow the guidance from your local public health officials or water utility. If soap and water are not available, use an alcohol-based hand sanitizer containing at least 60% alcohol.
