APWA Uniform Color Codes
Do you know what's below?
Utility color codes are used to identify existing underground utilities in construction areas with the intent of protecting them from damage during excavation. This is done with either flags or a special spray paint, neither of which will cause long-term harm to your lawn.
The American Public Works Association (APWA) Uniform Color Codes for temporary marking of underground utilities are listed below:
White
Proposed Excavation
Pink
Temporary Survey Markings
Red
Electric Power Lines, Cables, Conduit and Lightning Cables
Orange
Communication, Alarm or Signal Lines, Cables or Conduit
Yellow
Gas, Oil, Steam, Petroleum or Gaseous Materials
Green
Sewers and Drain Lines
Blue
Potable Water
Purple
Reclaimed Water, Irrigation and Slurry Lines