Naics code Naics title Naics description
2213 Water, Sewage and Other Systems This industry group comprises establishments primarily engaged in: (1) operating water treatment plants and/or water supply systems; (2) operating sewer systems or sewage treatment facilities; or (3) providing steam, heated air, or cooled air.
22131 Water Supply and Irrigation Systems See industry description for 221310.
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.
22132 Sewage Treatment Facilities See industry description for 221320.
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.
22133 Steam and Air-Conditioning Supply See industry description for 221330.
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.
23 Construction The Construction sector comprises establishments primarily engaged in the construction of buildings or engineering projects (e.g., highways and utility systems). Establishments primarily engaged in the preparation of sites for new construction and establishments primarily engaged in subdividing land for sale as building sites also are included in this sector.
236 Construction of Buildings The Construction of Buildings subsector comprises establishments primarily responsible for the construction of buildings. The work performed may include new work, additions, alterations, or maintenance and repairs. The on-site assembly of precut, panelized, and prefabricated buildings and construction of temporary buildings are included in this subsector. Part or all of the production work for which the establishments in this subsector have responsibility may be subcontracted to other construction establishments--usually specialty trade contractors.
2361 Residential Building Construction —