The American Public Works Association (APWA) Uniform Color Codes for survey marker temporary marking of underground utilities:
| Red | Electric Power Lines, Cables, Conduit, and Lighting Cables |
| Orange | Communication, Alarm or Signal Lines, Cables, or Conduit |
| Yellow | Gas, Oil, Steam, Petroleum, or Gaseous Material |
| Green | Sewers and Drain Lines |
| Blue | Potable Water |
| White | Proposed Excavation Limits or Route |
| Pink | Temporary Survey Markings, Unknown / Unidentified Facilities |
| Purple | Reclaimed Water, Irrigation, and Slurry Lines |
























