Final answer:
A customer warning sign at a dispenser for drinking water typically requires the word 'WARNING', a description or image of the hazard, and any applicable health risk statements or symptoms.
Step-by-step explanation:
On a customer warning sign at a dispenser for drinking water, the following information is typically required:
1. The word "WARNING" prominently displayed to alert customers.
2. A description or image of the hazard, such as a picture of a person with a crossed-out cup, indicating that the water is unsafe to drink.
3. Any applicable health risk statements or symptoms associated with the hazard, such as "May cause illness or stomach discomfort".