Color Code for Marking Underground Utility Lines

Color Code for Marking Underground Utility Lines
  • Red - Electric
  • Yellow - Gas-Oil-Steam
  • Orange - Communication CATV
  • Blue - Water
  • Purple - Reclaimed water, irrigation
  • Green - Sewer
  • Pink - Temporary survey markings
  • White - Proposed excavation
After the underground utilities have been marked, and the 48-hour time frame has elapsed, the excavation work may commence.

A minimum clearance of 2 feet between a marked and unexposed underground utility and the cutting edge or point of any power-operated equipment must be kept.

If the excavation is required within 2 feet of any marking, the excavation should be performed very carefully with hand tools.

If there has been any damage to an underground utility, or if there is a suspicion of damage, it is the excavator’s responsibility to notify the utility company directly.

If the situation appears to be dangerous, call 911.