NAICS 237110: Water and Sewer Line and Related Structures Construction
This industry comprises establishments primarily engaged in the construction of water and sewer lines, mains, pumping stations, treatment plants, and storage tanks. The work performed may include new work, reconstruction, rehabilitation, and repairs. Specialty trade contractors are included in this industry if they are engaged in activities primarily related to water, sewer line, and related structures construction. All structures (including buildings) that are integral parts of water and sewer networks (e.g., storage tanks, pumping stations, water treatment plants, and sewage treatment plants) are included in this industry. Illustrative Examples: Distribution line, sewer and water, construction Sewer main, pipe and connection, construction Fire hydrant installation Storm sewer construction Irrigation systems construction Water main and line construction Sewage disposal plant construction Water treatment plant construction Pumping station, water and sewage system, construction Water system storage tank and tower construction Reservoir construction Water well drilling, digging, boring, or sinking (except water intake wells in oil and gas fields) Cross-References. Establishments primarily engaged in--Show more
NAICS 237110 – Water and Sewer Line and Related Structures Construction encompasses the design, installation, rehabilitation, and maintenance of potable water distribution systems, sanitary and stormwater sewer networks, pumping stations, manholes, catch basins, and associated conveyance infrastructure. This sector supports critical public health and environmental compliance objectives through the construction of buried pipelines, trenchless technologies, and hydraulic structures that integrate with municipal, federal, and tribal water resource systems.
Industry Spending Overview
Federal obligations, top contractors and agencies, and related industry codes for NAICS 237110.
AI Industry Description
NAICS 237110 – Water and Sewer Line and Related Structures Construction encompasses the design, installation, rehabilitation, and maintenance of potable water distribution systems, sanitary and stormwater sewer networks, pumping stations, manholes, catch basins, and associated conveyance infrastruct...
NAICS 237110 – Water and Sewer Line and Related Structures Construction encompasses the design, installation, rehabilitation, and maintenance of potable water distribution systems, sanitary and stormwater sewer networks, pumping stations, manholes, catch basins, and associated conveyance infrastructure. This sector supports critical public health and environmental compliance objectives through the construction of buried pipelines, trenchless technologies, and hydraulic structures that integrate with municipal, federal, and tribal water resource systems. In the federal contracting landscape, this NAICS code serves as a foundational component of infrastructure resilience initiatives, often tied to environmental remediation, facility modernization, and disaster recovery programs under the jurisdiction of multiple federal agencies. Top contractors in this space include AAECON GENERAL CONTRACTING LLC, DAP CONSTRUCTION MANAGEMENT LLC, ASPEN CONSTRUCTION COMPANY, MAVERICK CONSTRUCTORS, LLC, PHOENIX GENERAL CONTRACTORS, LLC, SEPTECH ATL LLC, VSGI LLC, ELBOW GREASE ENTERPRISES, LLC, and KLEINFELDER, INC. These firms range from specialized small businesses with niche expertise in trenchless rehabilitation to larger primes with multi-disciplinary civil engineering capabilities, reflecting a competitive landscape that values technical proficiency in pipe lining, directional drilling, and corrosion-resistant material applications. The Department of Veterans Affairs, Department of Defense, Department of Agriculture, Department of the Interior, Department of Labor, Department of Justice, and Department of Homeland Security are the primary federal buyers. Demand is driven by the need to upgrade aging infrastructure on military installations, VA medical campuses, national parks, rural water systems, and federal detention or correctional facilities, often under mandates for sustainability and regulatory compliance. The market presents consistent opportunity density due to the aging national water and sewer infrastructure and ongoing federal investment in climate-resilient utilities. Contractors with proven experience in ANSI/AWWA standards, ASTM material specifications, and federal construction regulations such as the Davis-Bacon Act are well-positioned to compete effectively in this technical and compliance-heavy sector.
Small Business Size Standard
The SBA threshold that decides who can bid NAICS 237110 work as a small business.
The SBA cap for this NAICS (13 CFR 121.201). A business at or under it can self-certify as small for work in this code, which is what makes it eligible for a small-business set-aside. The cap is set per NAICS, so the same company can be small in one code and not in another.
13 CFR 121.201, effective January 1, 2026. The SBA revises the table roughly once a year.
Top Contractors
Companies with the highest total award value under NAICS 237110, ranked by dollars won.
| Company | Total Awards | Contracts |
|---|---|---|
| HENSEL PHELPS CONSTRUCTION CO | $309.7M | 1 |
| GARNEY FEDERAL, INC. | $141.3M | 1 |
| AMES FEDERAL CONTRACTING GROUP LLC | $129.5M | 2 |
| RECORD STEEL AND CONSTRUCTION, INC. | $129.2M | 1 |
| G.S.E. CONSTRUCTION COMPANY, INC. | $109.5M | 1 |
| CARSTENSEN CONTRACTING INC | $81.0M | 1 |
| FLATLAND ENERGY SERVICES LLC | $75.5M | 1 |
| PERINI MANAGEMENT SERVICES, INC. | $69.5M | 1 |
| RED POINT CONSTRUCTION, LLC | $48.4M | 1 |
| RED EAGLE 3 JV | $22.9M | 1 |
Top Agencies
Federal agencies directing the most contract spending toward NAICS 237110.
Competition
How many companies historically bid on federal awards in NAICS 237110, from bidder counts reported on USAspending.
Median under 3 bidders per reported award. · 27,123 reported awards
Median Bidders
2
Per reported award, all-time
Single-Bid Awards
43%
Share of reported awards with one bidder
10+ Bidder Awards
3%
Share of reported awards with 10+ bidders
Reported Awards
27,123
86% of 31,596 total awards
Share of reported awards in each bidder-count bracket per federal fiscal year.
How this code compares up the NAICS hierarchy. Parent cohorts pool every code under their prefix, so they are the steadier baseline when a 6-digit sample is thin.
| Industry Family | Competition | Median Bidders | Single-Bid | Bidder Mix | Reported Awards |
|---|---|---|---|---|---|
237110This Code Water and Sewer Line and Related Structures Construction | Fewer Bidders | 2 | 43% | 27,12386% of 31,596 | |
23711NAICS Industry | Fewer Bidders | 2 | 43% | 27,12386% of 31,596 | |
2371Industry Group Utility System Construction | Fewer Bidders | 2 | 45% | 44,18789% of 49,754 | |
237Subsector | Fewer Bidders | 2 | 35% | 162,38989% of 181,740 | |
23Sector Construction | Fewer Bidders | 2 | 40% | 1,132,66189% of 1,275,170 |
Bidder counts reported on past federal awards in this NAICS (USAspending). An open opportunity has no bidders yet, so this is the historical norm for similar work, not a fact about this solicitation. Not all awards report bidder counts, and fewer bidders often means incumbent-held work rather than an easier win. Federal reporting of bidder counts fell from ~96% of awards (FY2016) to ~30% (FY2018 onward); the chart shows shares of reported awards, and washed-out stretches mark years with fewer than 30 of them.
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