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.
Department of Defense · Hawaii · Due January 7, 2027
What NAICS 221310 covers
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.
Not in this code
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.
Government establishments primarily engaged in administering irrigation districts are classified in Industry 926130, Regulation and Administration of Communications, Electric, Gas, and Other Utilities.
SBA size standard
A business is small under NAICS 221310 if it has no more than $41 million in average annual receipts (averaged over the last five completed fiscal years, including affiliates).
Source: SBA Table of Size Standards, effective 2023-03-17. Always check the size standard printed in the solicitation itself.
Who buys it
Departments that posted the most NAICS 221310 solicitations in the last two years:
FA8601 - Industrial Water Treatment at Wright-Patterson AFB · Department of Defense · Ohio · posted September 25, 2026
Water Treatment, Maintenance, & Monitoring Services - VA Black Hills Health Care System - Hot Springs VA Medical Center · Veterans Affairs · South Dakota · posted September 25, 2026
Heating Ventilation and Air Conditioning, Industrial Water Treatment Services · Department of Defense · California · posted September 25, 2026
FCC Yazoo City FY 2027 Water Treatment Services · Justice · Mississippi · posted September 24, 2026
Water System Chemical Treatment Services for the VA Salt Lake City UT · Veterans Affairs · Utah · posted September 23, 2026
J046--Water Treatment & Maintenance BASE 2 YEAR OPTION · Veterans Affairs · North Carolina · posted September 21, 2026
Nc-alligator RIV nwr-hvac water treatmen · Interior · posted September 16, 2026
Do this kind of work?
Send XL Eagle your price on an open water supply and irrigation systems job. We write and submit the bid under our registrations. If we win, you do the work at your price. No fees.
NAICS 221310 is 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.
What is the SBA size standard for NAICS 221310?
The size standard for NAICS 221310 is $41 million in average annual receipts. Firms at or under it count as small businesses for contracts assigned this code.
Are there government contracts for water supply and irrigation systems?
Yes. 1 government contract is open under NAICS 221310 right now, and 52 were posted in the last 12 months.
Can I bid on NAICS 221310 contracts without registering in SAM.gov?
You need an active SAM.gov registration to win a federal contract in your own name. If you would rather skip that, XL Eagle can bid as the prime contractor using your price, and you do the work as our subcontractor.
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