What color coding is used for potable water?

The correct color coding for potable water is represented by a blue background with black letters. This coding is standardized in various safety and regulation guidelines as an easily recognizable indication that the water is safe for drinking.

Using blue is effective because it differentiates potable water from other substances, such as chemicals or waste water, which are often marked with colors that convey potential hazards. Potable water is essential for health, so clear and consistent marking is crucial to prevent contamination and ensure safety in plumbing and irrigation systems.

The other options represent different uses or are not standards recognized for potable water, emphasizing the importance of using the correct color to maintain clarity and safety in identifying water types.