SIC 4971 — Irrigation Systems
Description & Classification
SIC code 4971 representing 'Irrigation Systems' is an industry category in the Standard Industrial Classification (SIC) system under U.S. OSHA and Federal procurement registers.
Modern NAICS Crosswalk
Trace the modern equivalent classifications in the 2022 North American Industry Classification System (NAICS) database:
- NAICS 221310 - Water Supply and Irrigation Systems (via SIC1987:4971→NAICS1997:22131→2002:221310→2007:221310→2012:221310→2017:221310→2022:221310)
Classification Details
| SIC Code | 4971 |
|---|---|
| Industry Title | Irrigation Systems |
| Division | Division E: Transportation, Communications, Electric, Gas, and Sanitary Services |
| Major Group | Major Group 49: Electric, Gas, and Sanitary Services |
| Source / Verified | US Census 1987 SIC Concordance / 2026-06-28 |
Related Resources & Compliance Guides
Further regulatory reference links for legacy SIC code 4971:
- SIC Codes Complete Compliance Guide — Detailed history and active legal applications of the SIC classification framework.
- Why Legacy SIC Codes Persist Guide — How credit systems and the SEC still rely on SIC metadata.
- SIC ↔ NAICS Crosswalk Tool — Trace industrial code conversions dynamically.
- SIC Major Group 49 Hub — View other legacy industries in this business division.
Related Industries in Major Group 49
Frequently Asked Questions (FAQ)
What industry does SIC code 4971 represent?
SIC 4971 is 'Irrigation Systems', a 4-digit Standard Industrial Classification (SIC) code under Major Group 49: Electric, Gas, and Sanitary Services (Division E: Transportation, Communications, Electric, Gas, and Sanitary Services); it maps to modern 2022 NAICS code(s): 221310 (Water Supply and Irrigation Systems).
What is the modern 2022 NAICS mapping for SIC 4971?
SIC code 4971 maps to modern NAICS codes: 221310 - Water Supply and Irrigation Systems.