Codes Titles Number of US Businesses
22 Utilities 34,615
221111Hydroelectric Power Generation 60
221112Fossil Fuel Electric Power Generation 118
221113Nuclear Electric Power Generation 34
221114Solar Electric Power Generation 419
221115Wind Electric Power Generation 206
221116Geothermal Electric Power Generation 106
221117Biomass Electric Power Generation 92
221118Other Electric Power Generation 11,938
221121Electric Bulk Power Transmission and Control 255
221122Electric Power Distribution 2,642
221210Natural Gas Distribution 3,349
221310Water Supply and Irrigation Systems 13,186
221320Sewage Treatment Facilities 1,857
221330Steam and Air-Conditioning Supply 353