What is the minimum duration recommended for washing hands?

The recommended minimum duration for washing hands is 20 seconds. This timeframe is supported by health organizations, including the Centers for Disease Control and Prevention (CDC), which emphasize that a thorough wash is crucial in effectively removing pathogens.

Washing hands for at least 20 seconds allows enough time for the friction needed to dislodge dirt, grease, and germs from the skin. This includes scrubbing all parts of the hands, including the back of the hands, between fingers, and under nails. Shorter washing times, such as 10 or 15 seconds, do not provide adequate assurance that harmful microbes have been completely removed. Although 30 seconds is longer than necessary, going beyond 20 seconds may not significantly enhance hand hygiene effectiveness but might lead to excessive water use. Thus, 20 seconds strikes an optimal balance between effectiveness and efficiency.