# NAICS 221310: Water Supply and Irrigation Systems

Breadcrumb: [NAICS codes](https://bidrover.com/naics) › [221310 Water Supply and Irrigation Systems](https://bidrover.com/naics/221310)

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.

- NAICS code: 221310
- Title: Water Supply and Irrigation Systems
- Sector: 22 Utilities
- Subsector: 221 Utilities
- Industry group: 2213 Water, Sewage and Other Systems
- SBA size standard: $41 million average annual receipts
- Open bids on BidRover: 0

## Open bids (0)

No open bids cite this code right now.

## Frequently asked questions

### What is NAICS code 221310?

NAICS 221310 is "Water Supply and Irrigation Systems" in the 2022 North American Industry Classification System, in sector 22 (Utilities). 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?

A business is small under NAICS 221310 at or below $41 million average annual receipts, including affiliates (13 CFR 121.201). Confirm the standard named in each solicitation.

### How many government bids are open under NAICS 221310?

No open bid in BidRover cites NAICS 221310 right now. Many state and local notices do not list a NAICS code, so a keyword alert for this work catches more of them.

### How do I get alerts for NAICS 221310 bids?

Save an alert on this page. A free account gets new matching bids by weekly email; the Team plan ($19/mo) sends daily alerts with match scores, the buyer, source link and documents.

## Related NAICS codes

- [237110 Water and Sewer Line and Related Structures Construction](https://bidrover.com/naics/237110)
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- [561730 Landscaping Services](https://bidrover.com/naics/561730)
- [445298 All Other Specialty Food Retailers](https://bidrover.com/naics/445298)
- [926130 Regulation and Administration of Communications, Electric, Gas, and Other Utilities](https://bidrover.com/naics/926130)
- [221320 Sewage Treatment Facilities](https://bidrover.com/naics/221320)
- [221330 Steam and Air-Conditioning Supply](https://bidrover.com/naics/221330)

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Code titles and definitions: U.S. Census Bureau, North American Industry Classification System (NAICS), 2022 (https://www.census.gov/naics/). Size standards: U.S. Small Business Administration, Small Business Size Standards, 13 CFR 121.201, eCFR text current as of 2026-10-21 (https://www.ecfr.gov/current/title-13/section-121.201).

BidRover lists bids from official public sources. It is not an issuing authority; confirm the NAICS code and size standard named in each solicitation.