Which color marking indicates the presence of sewer lines?

The color marking that indicates the presence of sewer lines is green. In the context of utility marking practices, each color serves a specific purpose to help identify the type of utility present. Green is universally recognized to signify sewer lines, which is crucial for ensuring safety during construction or excavation activities. This color coding helps workers and the public understand what type of underground infrastructure is present, thereby reducing the risk of accidents or damage to utility lines. The other colors represent different types of utilities: blue typically indicates potable water, orange signals communication and signal lines, and purple is used for reclaimed water. Understanding these color codes is vital for anyone involved in aerial pipeline patrol or ground-level utility work.