NAICS directory · Heavy and Civil Engineering Construction (237)
NAICS 237110 — Water and Sewer Line and Related Structures Construction
Construction of water mains, sewers, pump stations, treatment-plant site work, and related distribution and collection structures.
- SBA size standard
- $45.0M average annual receipts (13 CFR § 121.201, verified June 2026)
- Why the standard matters
- If your average annual receipts are under the standard, you can compete for small-business set-asides under this code — including 8(a), HUBZone, SDVOSB, and WOSB solicitations when your firm holds the certification.
- Open in our feed
- 63 open federal opportunities under 237110 right now — pulled from SAM.gov, updated hourly.
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