Utility markings use standardized colors to identify different types of underground facilities. Knowing what each color means helps you dig safely and avoid damage.
Utility companies follow a national color code to mark underground facilities. This standardized system helps identify the type of utility present and ensures consistent markings across the country.
White
Red
Yellow
Orange
Blue
Green
Purple
Pink
Utility markings indicate the approximate horizontal location of underground facilities. They do not show the exact depth of the utility line.
Always use caution when digging near marked lines. Hand dig carefully within the required tolerance zone on either side of the marking.
If markings are missing, unclear, or disturbed before your project begins, contact 811 to request an update before digging.
Utility markings are critical safety indicators. Once lines are marked, it is your responsibility to protect and follow them throughout your project.
• Do not remove, cover, or alter paint or flags
• Avoid disturbing markings during landscaping or site preparation
• Always dig carefully within the required tolerance zone on either side of the marking
• If markings become faded, damaged, or unclear, contact 811 before continuing work
