Labels and tags aiding in leak detection and wastewater treatment pipe maintenance are used by cities and counties to identify thousands of miles of pipes, their contents, diameter, and their directional flow. With the many substances used for water treatment, a standardized pipe marker color coding system is important. Using a combination of general base colors and specific color banding, the free DuraLabel Wastewater Treatment Pipe Marking Guide provides a standard color coding system to identify pipe contents.