Structure of NAICS Code 22 - Utilities

Hierarchy

NAICS 22 Details Page List All NAICS Top Categories

Each industry is classified hierarchically, starting from broad (3-digit) to specific (4-, 5-, 6-digit) codes, including extended 8-digit codes for detailed classification. Click on each category link to navigate to detailed pages with comprehensive industry information.

Hierarchy

3-Digits

4-Digits

5-Digits

6-Digits

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 NAICS 8-Digits (3 Codes)

221118-02 - Power Take-Offs 221118-03 - Water System Billing Management & Supplies 221118-04 - Power Plants

22111 - Electric Power Generation

221121 - Electric Bulk Power Transmission and Control 221122 - Electric Power Distribution NAICS 8-Digits (2 Codes)

221122-01 - Electric & Other Services-Combined 221122-02 - Electric Companies

22112 - Electric Power Transmission, Control, and Distribution

2211 - Electric Power Generation, Transmission and Distribution

221210 - Natural Gas Distribution NAICS 8-Digits (10 Codes)

221210-01 - Gas & Other Services-Combined 221210-02 - Gas Companies 221210-03 - Gas Processors 221210-04 - Gas Producers 221210-05 - Gas Recycling Plants 221210-06 - Gas Systems 221210-07 - Gas-Natural 221210-08 - Heat Supplying Companies 221210-09 - Natural Gas Transmission & Distribution 221210-10 - Propane-Bulk & Bottle-Delivery

22121 - Natural Gas Distribution

2212 - Natural Gas Distribution

221310 - Water Supply and Irrigation Systems NAICS 8-Digits (7 Codes)

221310-02 - Irrigation Companies 221310-03 - Water & Sewage Companies-Utility 221310-04 - Water Conservation Products & Services 221310-06 - Water Supply Systems 221310-07 - Water Treatment Management Plant 221310-08 - Rainwater Collection Systems 221310-09 - Reservoirs

22131 - Water Supply and Irrigation Systems

221320 - Sewage Treatment Facilities NAICS 8-Digits (5 Codes)

221320-01 - Sewage Disposal Systems 221320-02 - Sewage Treatment Consultants 221320-03 - Sewage Treatment Equipment 221320-04 - Sewer Companies-Utility 221320-05 - Sewer System Inspection/Rehabilitation

22132 - Sewage Treatment Facilities

221330 - Steam and Air-Conditioning Supply NAICS 8-Digits (2 Codes)

221330-02 - Steam & Air Conditioning Supply 221330-03 - Steam Energy Companies

22133 - Steam and Air-Conditioning Supply

2213 - Water, Sewage and Other Systems

221 - Utilities