APWA Utility Color Codes Chart - EngineerSupply

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APWA Utility Color Codes

The American Public Works Association (APWA) recommends the following guidelines be used when marking underground utilities.

APWA Utility Color White White = Proposed Excavation
APWA Utility Color Pink Pink = Temporary Survey Markings
APWA Utility Color Red Red = Electric Power Lines, Cables, Conduit and Lighting Cables
APWA Utility Color Yellow Yellow = Gas, Oil, Steam, Petroleum or Gaseous Materials
APWA Utility Color Orange Orange = Communication, Alarm or Signal Lines, Cables or Conduit
APWA Utility Color Blue Blue = Potable Water
APWA Utility Color Purple Purple = Reclaimed Water, Irrigation and Slurry Lines
APWA Utility Color Green Green = Sewer and Drain Lines

Why are these colors used?
Often, you will see these colors used to identify utility lines in cities and on a university campus. Sometimes city or campus utility departments will paint the tops (such as manhole lids, or sewer drop-inlet tops) of their utilities these colors before an aerial survey is flown so that the people creating the maps can identify the type of utility. If you see utilities being painted in your area, there's a good chance an aerial survey is going to be flown soon. Or sometimes utility departments are just taking inventory of their assets and are painting to identify their utility infrastructure, or possibly to diagnose a problem and they need to identify multiple utility types in an given area.

The utility departments that mark their utilities usually use inverted spray paint, also known as "upside down paint". EngineerSupply sells inverted spray paint by the case.

We sell Inverted Utility Marking Paint here

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