2022 Edition

national industry 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.

The immediate parent of national industry 221310 is international industry 22131: Water Supply and Irrigation Systems

2022 NAICS Edition Cross References

  • Establishments primarily engaged in irrigation project construction (except lawn) are classified in Industry 237110, Water and Sewer Line and Related Structures Construction;
  • Establishments primarily engaged in installing lawn sprinkler systems are classified in Industry 238220, Plumbing, Heating, and Air-Conditioning Contractors;
  • Establishments primarily engaged in lawn irrigation services are classified in Industry 561730, Landscaping Services;
  • Establishments primarily engaged in retailing bottled water are classified in U.S. Industry 445298, All Other Specialty Food Retailers; and
  • Government establishments primarily engaged in administering irrigation districts are classified in Industry 926130, Regulation and Administration of Communications, Electric, Gas, and Other Utilities.


The NAICS editions in which this code was present are indicated below. In the event that a code was changed from the prior edition the equivalent value in that edition is provided for reference.

Edition Existed Equivalent Value
2002 221310
2007 221310
2012 221310
2017 221310
2022 221310

Standard Industrial Classification (SIC) Mappings

  1. 4941 - Water Supply
  2. 4971 - Irrigation Systems

Insurance Industry Mappings

The US Property and Casualty Insurance Industry may use the following classification descriptions which might encompass national industry 221310, Water Supply and Irrigation Systems:

  1. irrigation or drainage system
  2. irrigation system
  3. irrigation work
  4. irrigation work operation
  5. irrigation work operation with dam
  6. irrigation work operation without dam
  7. office water company condominium office
  8. office water company office
  9. pipeline operation non flammable
  10. pipeline operation non flammable utility
  11. utility
  12. water company
  13. water company condominium office
  14. water company general liability is not available
  15. water company office
  16. water sewage and other system
  17. water supply
  18. water supply and irrigation system
  19. water treatment plant
  20. waterwork
  21. waterwork operation


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