Federal contracts for NAICS 221310 — Water Supply & Irrigation Systems

1. #1

   AMERICAN WATER OPERATIONS AND MAINTENANCE, LLC11 contracts · Department of Defense
   $1.9B
2. #2

   OLD NORTH UTILITY SERVICES, INC.1 contract · Department of Defense
   $642.5M
3. #3

   AMERICAN WATER ENTERPRISES, LLC3 contracts · Department of Defense
   $352.1M
4. #4

   AMERICAN STATES UTILITY SERVICES INC2 contracts · Department of Defense
   $271.0M

1. #1

   Department of Defense83 contracts
   $5.6B
2. #2

   Department of Health and Human Services4 contracts
   $105.4M
3. #3

   National Aeronautics and Space Administration5 contracts
   $46.3M
4. #4

   Department of Energy1 contract
   $46.1M

Frequently asked questions

What is NAICS 221310?

NAICS 221310 is the federal industry code for Water Supply & Irrigation Systems. The Census Bureau maintains the NAICS taxonomy; federal contracting officers use it to classify solicitations and confirm bidder eligibility.

How do I bid on federal contracts as a small business in NAICS 221310?

Register your business in SAM.gov, get a UEI, and confirm your NAICS code matches the solicitation's primary NAICS. Then write a capability statement that maps your past performance to the work in the RFP. Themis automates the matching and gives you a free AI brief for every active opportunity.

Do I need a SAM.gov registration to bid?

Yes — every federal contract award above the micro-purchase threshold requires the vendor to have an active SAM.gov registration with a Unique Entity Identifier (UEI) and the relevant NAICS codes listed on the registration.

What set-asides apply to NAICS 221310?

Common federal set-asides — Small Business (SBA), 8(a), HUBZone, SDVOSB, WOSB, EDWOSB — apply per solicitation, not per NAICS code. Each opportunity declares its own set-aside; Themis displays the eligibility class on every card so you can filter to ones you qualify for.

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Browse by set-aside

See opportunities reserved for each small-business program.

• Small BusinessSBA Small Business
• 8(a)SBA 8(a) Business Development Program
• HUBZoneHUBZone
• WOSBWomen-Owned Small Business (WOSB)
• EDWOSBEconomically Disadvantaged WOSB (EDWOSB)
• SDVOSBService-Disabled Veteran-Owned Small Business (SDVOSB)
• VOSBVeteran-Owned Small Business (VOSB)