Final answer:
The minimum temperature that hand washing sinks need to be at is warm or cold.
Step-by-step explanation:
The minimum temperature that hand washing sinks need to be at is warm or cold, according to the CDC's handwashing recommendations for the general public.
When washing your hands, you should wet them with clean, running water and apply soap. After washing, rinse thoroughly to ensure that any microorganisms are washed off the skin. Finally, dry your hands thoroughly with a clean towel or hot air blower.