| 221310 |
Establishments primarily engaged in irrigation project construction (except lawn) are classified in Industry 237110, Water and Sewer Line and Related Structures Construction |
| 221310 |
Establishments primarily engaged in installing lawn sprinkler systems are classified in Industry 238220, Plumbing, Heating, and Air-Conditioning Contractors |
| 221310 |
Establishments primarily engaged in lawn irrigation services are classified in Industry 561730, Landscaping Services |
| 221310 |
Establishments primarily engaged in retailing bottled water are classified in U.S. Industry 445298, All Other Specialty Food Retailers |
| 221310 |
Government establishments primarily engaged in administering irrigation districts are classified in Industry 926130, Regulation and Administration of Communications, Electric, Gas, and Other Utilities. |
| 221320 |
Operating waste treatment or disposal facilities (except sewer systems or sewage treatment facilities)--are classified in Industry 56221, Waste Treatment and Disposal |
| 221320 |
Operating water treatment plants and/or operating water supply systems--are classified in Industry 221310, Water Supply and Irrigation Systems |
| 221320 |
Pumping (i.e., cleaning) cesspools, portable toilets, and septic tanks or renting portable toilets--are classified in U.S. Industry 562991, Septic Tank and Related Services |
| 221320 |
Cleaning and rodding sewers and catch basins--are classified in U.S. Industry 562998, All Other Miscellaneous Waste Management Services. |
| 221330 |
Selling and installing warm air heating and air-conditioning equipment--are classified in Industry 238220, Plumbing, Heating, and Air-Conditioning Contractors |