Codes Titles Number of US Businesses
22 Utilities 35,234
221111Hydroelectric Power Generation 57
221112Fossil Fuel Electric Power Generation 122
221113Nuclear Electric Power Generation 28
221114Solar Electric Power Generation 336
221115Wind Electric Power Generation 179
221116Geothermal Electric Power Generation 113
221117Biomass Electric Power Generation 98
221118Other Electric Power Generation 13,828
221121Electric Bulk Power Transmission and Control 240
221122Electric Power Distribution 1,697
221210Natural Gas Distribution 3,278
221310Water Supply and Irrigation Systems 12,992
221320Sewage Treatment Facilities 1,891
221330Steam and Air-Conditioning Supply 375