221 Utilities
2211 Electric Power Generation, Transmission and
Distribution
- 22111 Electric Power Generation
- 221111 Hydroelectric Power Generation
- 221112 Fossil Fuel Electric Power Generation
- 221113 Nuclear Electric Power Generation
- 221119 Other Electric Power Generation
- 22112 Electric Power Transmission, Control, and
Distribution
- 221121 Electric Bulk Power Transmission and Control
- 221122 Electric Power Distribution
2212 Natural Gas Distribution
- 22121 Natural Gas Distribution
2213 Water, Sewage and Other Systems
- 22131 Water Supply and Irrigation Systems
- 22132 Sewage Treatment Facilities
- 22133 Steam and Air-Conditioning Supply