Variant of North American Industry Classification System (NAICS) 2022 Version 1.0 for Energy sector
- Non E - Industries not included in the energy sector
- 22e - Utilities, non E
- 221e - Utilities, non E
- 2213 - Water, sewage and other systems
- 22131 - Water supply and irrigation systemsUS
- 221310 - Water supply and irrigation systemsUS
- 22132 - Sewage treatment facilitiesUS
- 221320 - Sewage treatment facilitiesUS
- 22133 - Steam and air-conditioning supplyUS
- 221330 - Steam and air-conditioning supplyUS
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