What does marking color blue signify in the context of pipeline markings?

The color blue in pipeline markings signifies water. This standard is part of the American Public Works Association (APWA) Color Codes, which are used to provide a consistent and recognizable system for identifying different types of underground utilities. Blue markings specifically indicate potable water lines, such as those that supply drinking water to homes and businesses. Recognizing this color is crucial for professionals involved in excavation or construction, as it helps ensure that workers do not inadvertently damage water lines and encourage safe practices around utility installations and maintenance. Being aware of these color codes can prevent accidents and ensure that the correct protocols are followed in managing and working around water utility infrastructures.