Variant of NAICS 2017 Version 3.0 - Industrial production (based on the 1950 United Nations definition)

• 1 - Industrial production
• 22 - Utilities
• 221 - Utilities^US
• 2213 - Water, sewage and other systems^US

22133 - Steam and air-conditioning supply^US

This industry comprises establishments primarily engaged in the production or distribution of steam and heated or cooled air.