Understand
Locator Marks

• Utility locator markings protect you.
  Make sure you and your crew know how to read utility locator markings and know the American Public Works Association (APWA) uniform color code for marking underground utilities. Color code charts are usually available from your local one-call utility locator service.
  
  
• Locator flags are placed within paint marks.
  If you find flags outside the borders of locator markings, someone may have tampered with them. Contact your local one-call utility locator service.

APWA Color Codes:
Electric Power Lines
Gas, Oil, or Steam
Communication Lines, Cables, or Conduit
Potable Water
Reclaimed Water, Irrigation, and Slurry Lines
Sewers and Drain Lines
Temporary Survey Markings
Proposed Excavation

Utility locator markings protect you from injury and prevent damage to underground utilities. Make sure you and your crew know how to read them.