Questions? Call...800.591.8907

16 Years Serving Customers Like You. Buy With Confidence.

Engineering Supplies, Blueprint Storage, Measuring Tools, Surveying Equipment & More!

APWA Utility Color Codes

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

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

Factory-Authorized Dealer For The Most Trusted Brands In The Industry

Elite Series Engineering Products and Supplies Schonstedt Underground Location Equipment Keson Measuring Wheels and Measuring Tapes SitePro Surveying Supplies CST Berger Surveying Equipment Advanced Organizing Systems Blueprint Storage Boxes and Systems Calculated Industries Construction Calculators and Tools Elan Field Books and Engineering Log Books Bosch Tools and Measuring Equipment Crain Grade Rods Mayline Office Products, Cabinets, and Blueprint Stands Dahle Paper Trimmers and Shredders Alvin Drafting and Art Products Safco Office Furniture and Products Doc Box Permit Holders and Boxes Brookside Design Premium Brand Blueprint Stands, Clamps, and Racks Topcon Rotary Laser Levels and Detectors DuraWheel Distance Measuring Wheels Seco Land Surveying Equipment and Products Dietzgen Paper and Media
View All Brands


Please Wait... processing