What standard should be followed for handwashing in sanitation?

The recommended standard for handwashing is to wash with soap and water for at least 20 seconds. This duration is based on extensive research indicating that washing for this amount of time is effective in removing most germs and contaminants from the hands.

When hands are washed properly for at least 20 seconds, it allows enough time for the soap to break down oils and dirt, and for the mechanical action of scrubbing to effectively dislodge germs. It includes lathering and scrubbing all parts of the hands, including the back of the hands, between fingers, and under nails, ensuring that all areas are cleaned adequately.

While washing for shorter durations, such as 15 seconds, may not provide sufficient time to thoroughly clean the hands, washing for 30 seconds could extend the process unnecessarily, leading to less frequent handwashing. The option that suggests washing hands only when they are visibly dirty does not align with best practices, as many harmful germs can be present even when hands appear clean. Therefore, following the 20-second guideline strikes an optimal balance between effectiveness and practicality in maintaining sanitation and safety.