1997 NAICS Definitions
221 Utilities

221 Utilities

Industries in the Utilities subsector provide electric power, natural gas, steam supply, water supply, and sewage removal through a permanent infrastructure of lines, mains, and pipes. Establishments are grouped together based on the utility service provided and the particular system or facilities required to perform the service.

2211 Electric Power Generation, Transmission and Distribution

This industry group comprises establishments primarily engaged in generating, transmitting, and/or distributing electric power. Establishments in this industry group may perform one or more of the following activities: (1) operate generation facilities that produce electric energy; (2) operate transmission systems that convey the electricity from the generation facility to the distribution system; and (3) operate distribution systems that convey electric power received from the generation facility or the transmission system to the final consumer.

22111 Electric Power Generation

This industry comprises establishments primarily engaged in operating electric power generation facilities. These facilities convert other forms of energy, such as water power (i.e., hydroelectric), fossil fuels, nuclear power, and solar power, into electrical energy. The establishments in this industry produce electric energy and provide electricity to transmission systems or to electric power distribution systems.

221111 Hydroelectric Power Generation

This U.S. industry comprises establishments primarily engaged in operating hydroelectric power generation facilities. These facilities use water power to drive a turbine and produce electric energy. The electric energy produced in these establishment is provided to electric power transmission systems or to electric power distribution systems.

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NAICSSICCorresponding Index Entries
22111149M Electric power generation, hydroelectric
22111149M Power generation, hydroelectric

221112 Fossil Fuel Electric Power Generation

This U.S. industry comprises establishments primarily engaged in operating fossil fuel powered electric power generation facilities. These facilities use fossil fuels, such as coal, oil, or gas, in internal combustion or combustion turbine conventional steam process to produce electric energy. The electric energy produced in these establishments are provided to electric power transmission systems or to electric power distribution systems.

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NAICSSICCorresponding Index Entries
22111249M Electric power generation, fossil fuel (e.g., coal, oil, gas)
22111249M Power generation, fossil fuel (e.g., coal, gas, oil), electric

221113 Nuclear Electric Power Generation

This U.S. industry comprises establishments primarily engaged in operating nuclear electric power generation facilities. These facilities use nuclear power to produce electric energy. The electric energy produced in these establishments are provided to electric power transmission systems or to electric power distribution systems.

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NAICSSICCorresponding Index Entries
22111349M Electric power generation, nuclear
22111349M Power generation, nuclear electric

221119 Other Electric Power Generation

This U.S. industry comprises establishments primarily engaged in operating electric power generation facilities (except hydroelectric, fossil fuel, nuclear). These facilities convert other forms of energy, such as solar, wind, or tidal power, into electrical energy. The electric energy produced in these establishment is provided to electric power transmission systems or to electric power distribution systems.

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NAICSSICCorresponding Index Entries
22111949M Electric power generation, (except fossil fuel, hydroelectric, nuclear)
22111949M Electric power generation, solar
22111949M Electric power generation, tidal
22111949M Electric power generation, wind
22111949M Power generation, electric (except fossil fuel, hydroelectric, nonhazardous solid waste, nuclear
22111949M Power generation, solar electric
22111949M Power generation, tidal electric
22111949M Power generation, wind electric

22112 Electric Power Transmission, Control, and Distribution

This industry comprises establishments primarily engaged in operating electric power transmission systems, controlling (i.e., regulating voltages) the transmission of electricity, and/or distributing electricity. The transmission system includes lines and transformer stations. These establishments arrange, facilitate, or coordinate the transmission of electricity from the generating source to the distribution centers, other electric utilities, or final consumers. The distribution system consists of lines, poles, meters, and wiring that deliver the electricity to final consumers.

221121 Electric Bulk Power Transmission and Control

This U.S. industry comprises establishments primarily engaged in operating electric power transmission systems and/or controlling (i.e., regulatory voltage) the transmission of electricity from the generating source to distribution centers or other electric utilities. The transmission system includes lines and transformer stations.

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NAICSSICCorresponding Index Entries
22112149M Electric power control
22112149M Electric power transmission systems
22112149M Transmission of electric power

221122 Electric Power Distribution

This U.S. industry comprises electric power establishments primarily engaged in (1) operating electric power distribution systems (i.e., consisting of lines, poles, meters, and wiring) or (2) operating as electric power brokers or agents that arrange the sale of electricity via power distribution systems operated by others.

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NAICSSICCorresponding Index Entries
22112249M Distribution of electric power
22112249M Electric power brokers
22112249M Electric power distribution systems

2212 Natural Gas Distribution

22121 Natural Gas Distribution

221210 Natural Gas Distribution

This industry comprises: (1) establishments primarily engaged in operating gas distribution systems (e.g., mains, meters); (2) establishments known as gas marketers that buy gas from the well and sell it to a distribution system; (3) establishments known as gas brokers or agents that arrange the sale of gas over gas distribution systems operated by others; and (4) establishments primarily engaged in transmitting and distributing gas to final consumers.

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NAICSSICCorresponding Index Entries
2212104925Blue gas, carbureted, production and distribution
2212104925Coke oven gas, production and distribution
2212104925Distribution of manufactured gas
22121049M Distribution of natural gas
2212104925Gas, manufactured, production and distribution
2212104925Gas, mixed natural and manufactured, production and distribution
22121049M Gas, natural, distribution
2212104925Liquefied petroleum gas (LPG) distribution through mains
2212104925Manufactured gas production and distribution
2212104924Natural gas brokers
221210492MNatural gas distribution systems
2212104924Natural gas marketers

2213 Water, Sewage and Other Systems

22131 Water Supply and Irrigation Systems

221310 Water Supply and Irrigation Systems

This industry comprises establishments primarily engaged in operating water treatment plants and/or operating water supply systems. The water supply system may include pumping stations, aqueducts, and/or distribution mains. The water may be used for drinking, irrigation, or other uses.

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NAICSSICCorresponding Index Entries
2213104971Canal, irrigation
2213104941Filtration plant, water
2213104971Impounding reservoirs, irrigation
2213104971Irrigation system operation
2213104941Water distribution (except irrigation)
2213104971Water distribution for irrigation
2213104941Water filtration plant operation
2213104941Water supply systems
2213104941Water treatment and distribution
2213104941Water treatment plants

22132 Sewage Treatment Facilities

221320 Sewage Treatment Facilities

This industry comprises establishments primarily engaged in operating sewer systems or sewage treatment facilities that collect, treat, and dispose of waste.

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NAICSSICCorresponding Index Entries
2213204952Collection, treatment, and disposal of waste through a sewer system
2213204952Sewage disposal plants
2213204952Sewage treatment plants or facilities
2213204952Sewer systems
2213204952Waste collection, treatment, and disposal through a sewer system

22133 Steam and Air-Conditioning Supply

221330 Steam and Air-Conditioning Supply

This industry comprises establishments primarily engaged in providing steam, heated air, or cooled air. The steam distribution may be through mains.

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NAICSSICCorresponding Index Entries
2213304961Air-conditioning supply
2213304961Cooled air distribution
2213304961Distribution of cooled air
2213304961Distribution of heated air
2213304961Distribution of steam heat
2213304961Geothermal steam production
2213304961Heat, steam, distribution
2213304961Heated air distribution
2213304961Heating steam (suppliers of heat) providers
2213304961Steam heat distribution
2213304961Steam heating systems (i.e., suppliers of heat)
2213304961Steam production and distribution
2213304961Steam supply systems, including geothermal