American Public Works Association Uniform Color Code
Electric power lines, cables or conduits, and lighting cables.
Gas, oil, steam, petroleum or other hazardous liquid or gaseous materials.
Communications, cable TV, alarm or signal lines, cables, or conduits.
Water, irrigation, and slurry lines.
Sewers, storm sewer facilities, or other drain lines.
Temporary survey markings.
Reclaimed water, irrigation and slurry lines.