NAICS CODE - 22 : Utilities

221111: Hydroelectric Power Generation
221112: Fossil Fuel Electric Power Generation
221113: Nuclear Electric Power Generation
221114: Solar Electric Power Generation
221115: Wind Electric Power Generation
221116: Geothermal Electric Power Generation
221117: Biomass Electric Power Generation
221118: Other Electric Power Generation

221121: Electric Bulk Power Transmission and Control
221122: Electric Power Distribution

221210: Natural Gas Distribution

221310: Water Supply and Irrigation Systems

221320: Sewage Treatment Facilities

221330: Steam and Air-Conditioning Supply