North American Industry Classification System (NAICS) Canada 2012
- 22 - Utilities
- 221 - UtilitiesUS
- 2213 - Water, sewage and other systemsUS
- 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
- Date modified: