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.
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.
Examples of work in this code:
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)
Not in this code
Establishments primarily engaged in constructing marine facilities (e.g., ports), flood control structures, dams, or hydroelectric power generation facilities are classified in Industry 237990, Other Heavy and Civil Engineering Construction.
Establishments primarily engaged in installing septic tanks are classified in Industry 238910, Site Preparation Contractors.
Establishments primarily engaged in drilling oil and gas field water intake wells are classified in U.S. Industry 213111, Drilling Oil and Gas Wells.
Establishments primarily engaged in installing and maintaining water and sewer lines performed by water and sewage utilities companies are classified in Industry Group 2213, Water, Sewage and Other Systems.
SBA size standard
A business is small under NAICS 237110 if it has no more than $45 million in average annual receipts (averaged over the last five completed fiscal years, including affiliates).
Source: SBA Table of Size Standards, effective 2023-03-17. Always check the size standard printed in the solicitation itself.
Who buys it
Departments that posted the most NAICS 237110 solicitations in the last two years:
Y--Rehabilitation of Water and Wastewater System · Interior · posted September 28, 2026
9-Mile Pump Station · Department of Defense · posted September 24, 2026
Loleta Water System Upgrades · Agriculture · Pennsylvania · posted September 24, 2026
Fort Mifflin Sewage Lift Station · Department of Defense · posted September 23, 2026
Y--brca 318695 - construction · Interior · posted September 23, 2026
J--ncr-nama: fire hydrant replacement · Interior · posted September 23, 2026
Nemo Domestic Well Northern Hills Ranger District, Black Hills NF, South Dakota · Agriculture · South Dakota · posted September 22, 2026
NBSFS Water Tank Maintenance · Department of Defense · New Hampshire · posted September 21, 2026
Do this kind of work?
Send XL Eagle your price on an open water and sewer line and related structures construction job. We write and submit the bid under our registrations. If we win, you do the work at your price. No fees.
NAICS 237110 is 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.
What is the SBA size standard for NAICS 237110?
The size standard for NAICS 237110 is $45 million in average annual receipts. Firms at or under it count as small businesses for contracts assigned this code.
Are there government contracts for water and sewer line and related structures construction?
Yes. 9 government contracts are open under NAICS 237110 right now, and 177 were posted in the last 12 months.
Can I bid on NAICS 237110 contracts without registering in SAM.gov?
You need an active SAM.gov registration to win a federal contract in your own name. If you would rather skip that, XL Eagle can bid as the prime contractor using your price, and you do the work as our subcontractor.
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