2017 NAICS Definition

T = Canadian, Mexican, and United States industries are comparable.

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.

2007 NAICS		2012 NAICS		2017 NAICS		Corresponding Index Entries
221310		221310		221310		Canal, irrigation
221310		221310		221310		Filtration plant, water
221310		221310		221310		Impounding reservoirs, irrigation
221310		221310		221310		Irrigation system operation
221310		221310		221310		Water distribution (except irrigation)
221310		221310		221310		Water distribution for irrigation
221310		221310		221310		Water filtration plant operation
221310		221310		221310		Water supply systems
221310		221310		221310		Water treatment and distribution
221310		221310		221310		Water treatment plants