Which color coding represents gas in USA utility markings?

Yellow is the correct color code for gas utility markings in the United States. This standardization is crucial for safety, as it helps workers and the general public identify potential hazards associated with underground utilities. The specific use of yellow for gas utility markings allows for quick recognition, especially when excavation or construction activities are taking place. This knowledge aids in preventing accidents that could occur if a gas line is inadvertently struck during digging.

The other colors, while they have their own designated meanings—purple represents reclaimed water, red indicates electric utilities, and orange signifies communication utilities—are not applicable to gas, reinforcing the importance of memorizing these distinctions for safe and efficient utility management.