NAICS 2022 nationalIndustry USA Verified: Census NAICS 2022 · 2026-01-01
221310
NAICS 221310 — Water Supply and Irrigation Systems
Water Supply and Irrigation Systems
NAICS 221310 is the national industry code for water supply and irrigation systems establishments in the United States. The Small Business Administration sets a size standard of $41.0 for this classification. It forms part of the hierarchical North American Industry Classification System maintained by the Census Bureau.
SBA: $41.0
View full SBA standard
Official Illustrative Examples
Primary activities officially recognized by Census Bureau / Statistics Canada:
irrigation system operation water collection, treatment and distribution systems water filtration plant operation
Complete Index of Activities (11 recognized activities) ▼
filtration plant, water, municipal
irrigation system operation
municipal water system operation
water board, local government
water collection, treatment and distribution systems
water cooperatives
water distribution for irrigation
water filtration plant operation
water supply and irrigation systems
water supply pipelines, long distance
water supply systems, operation
Official data
| Feature | Description |
|---|---|
| Official name | North American Industry Classification System (NAICS) 2022 |
| Issuing authority | U.S. Census Bureau with OMB, Statistics Canada, and INEGI |
| Tax authority | Internal Revenue Service (IRS) |
| Purpose | Statistical business classification and federal contracting (SAM.gov, SBA standards) |
| Used in | SAM.gov registration, SBA size determinations, IRS tax classification, SEC EDGAR (via SIC crosswalk) |
| Active since | 2022 (current edition) |
| Hierarchy level | Sector (2-digit) |
| Source | https://www.census.gov/naics/ |
NAICS hierarchy path
Trace the classification from the broadest sector down to this national industry code.
Cross-references & crosswalks
SBA size standard description
Water Supply and Irrigation Systems
Changes to receipts-based standard: [object Object]