| CSI Code | Short Description | Extended Description |
| 02500 | Utility Service |
| 02510 | Water Distribution | Cistems Disinfection of Water Distribution Fire Suppression Water Distribution Site Water Distribution Water Supply |
| 02520 | Well | Extraction Wells Monitoring Wells Recharge Wells Test Wells Water Supply Wells Well Abandonment |
| 02530 | Sanitary Sewerage | Gauging Stations Packaged Pumping Stations Packaged Lift Stations Sanitary Cleanouts Sanitary Sewage Systems Sanitary Sewer Manholes, Frames, and Covers Sewage Collection Lines Sewage Force Mains Site Sanitary Sewage Lines |
| 02540 | Septic Tank System | Drainage Field Grease Interceptor Sand Filter Septic Tank Siphon Tank |
| 02550 | Piped Energy Distribution | Chilled Water Distribution Hot Water Distribution Liquid Petroleum Gas Distribution Natural Gas Distribution Oil Distribution Steam Distribution |
| 02570 | Process Materials Distribution Structure |
| 02580 | Electrical & Communication Structure | Antenna Towers Lighting Poles and Standards Transmission Towers Underground Ducts and Manholes Utility Poles |
| 02590 | Site Grounding |