Company lists · Data refreshed September 2026

Top 25 Water supply system companies based in the United States

Name: Water supply system companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 903 companies tracked

RevenueBase identified 903 water supply system companies headquartered in the United States as of September 2026 and tracks 21,871 professional contacts across them, including 10,923 with verified work emails. Houston is the largest hub.

This list covers water supply system companies headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 22, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 22, 2026 86% judged on-target in blind review

903Companies

21,871Contacts tracked

10,923Verified emails

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The 25 largest water supply system companies based in the United States

Ranked by team size

Top 25 of 903 water supply system companies based in the United States, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to water supply system companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Core & Main	Indirect evidence	St. Louis, MO, United StatesHQ checked Sep 22, 2026	1,001-5,000	2,165 contacts →
	Indirect evidence “Based in St.” Source: RevenueBase Database · checked Sep 22, 2026
2	Carollo Engineers	Partial evidence	Walnut Creek, CA, United StatesHQ checked Sep 22, 2026	1,001-5,000	1,718 contacts →
	Partial evidence “For more than 90 years, Carollo Engineers has been dedicated exclusively to water and wastewater solutions.” Source: RevenueBase Database · checked Sep 22, 2026
3	Garney Construction	Partial evidence	North Kansas City, MO, United StatesHQ checked Sep 22, 2026	1,001-5,000	1,009 contacts →
	Partial evidence “Garney Construction is a national leader in water and wastewater construction.” Source: RevenueBase Database · checked Sep 22, 2026
4	Inframark	Partial evidence	Horsham, PA, United StatesHQ checked Sep 22, 2026	1,001-5,000	973 contacts →
	Partial evidence “As an Azuria owned company, Inframark is a widely recognized leader in Water Infrastructure Operations and Infrastructure Management Services.” Source: RevenueBase Database · checked Sep 22, 2026
5	Mastec Utility Services	Indirect evidence	Coral Gables, FL, United StatesHQ checked Sep 22, 2026	1,001-5,000	562 contacts →
	Indirect evidence “WE'RE HIRING FOR POWER, GAS, & INFRASTRUCTURE ROLES ACROSS THE COUNTRY!* Join the Team That Keeps Energy and Infrastructure Moving Forward.” Source: RevenueBase Database · checked Sep 22, 2026
6	Westech Engineering	Partial evidence	Salt Lake City, UT, United StatesHQ checked Sep 22, 2026	501-1,000	554 contacts →
	Partial evidence “WesTech Engineering, LLC designs, engineers, and manufactures water and wastewater treatment process equipment for mineral, industrial, and municipal applications worldwide.” Source: RevenueBase Database · checked Sep 22, 2026
7	MWH	Indirect evidence	Broomfield, CO, United StatesHQ checked Sep 22, 2026	501-1,000	428 contacts →
	Indirect evidence “As a leading U.S.” Source: RevenueBase Database · checked Sep 22, 2026
8	Ae2s Advanced Engineering And Environmental Services, LLC	Indirect evidence	Grand Forks, ND, United StatesHQ checked Sep 22, 2026	201-500	339 contacts →
	Indirect evidence “AE2S is a specialized civil/environmental consulting engineering firm that provides professional services and our unique brand of extreme client service to clients in the upper…” Source: RevenueBase Database · checked Sep 22, 2026
9	Etna Supply	Strong evidence	Grand Rapids, MI, United StatesHQ checked Sep 22, 2026	501-1,000	303 contacts →
	Strong evidence “Etna Supply is a family of companies committed to providing the essential products, expertise, and support that keep water moving and businesses running.” Source: RevenueBase Database · checked Sep 22, 2026
10	Usabluebook	Partial evidence	Waukegan, IL, United StatesHQ checked Sep 22, 2026	5,001-10,000	241 contacts →
	Partial evidence “Rely on USABlueBook for everything you need for water and wastewater operations and maintenance.” Source: RevenueBase Database · checked Sep 22, 2026
11	Mcmillen	Partial evidence	Boise, ID, United StatesHQ checked Sep 22, 2026	201-500	226 contacts →
	Partial evidence “Water is a powerful and precious resource that deserves responsible management.” Source: RevenueBase Database · checked Sep 22, 2026
12	Aqua-Aerobic Systems, INC	Indirect evidence	Loves Park, IL, United StatesHQ checked Sep 22, 2026	51-200	207 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
13	Ulliman Schutte Construction	Partial evidence	Miamisburg, OH, United StatesHQ checked Sep 22, 2026	501-1,000	196 contacts →
	Partial evidence “Ulliman Schutte is a national leader in providing water infrastructure in the United States.” Source: RevenueBase Database · checked Sep 22, 2026
14	Newterra	Partial evidence	Coraopolis, PA, United StatesHQ checked Sep 22, 2026	201-500	185 contacts →
	Partial evidence “Newterra designs, engineers, manufactures, and services environmental, water and wastewater treatment solutions that assure great performance, superb reliability, and the highest…” Source: RevenueBase Database · checked Sep 22, 2026
15	Felix Construction Company	Partial evidence	Phoenix, AZ, United StatesHQ checked Sep 22, 2026	201-500	178 contacts →
	Partial evidence “Felix Construction Company is a general engineering contractor and construction management company with a specific focus on: Water production facilities, well sites, booster pump…” Source: RevenueBase Database · checked Sep 22, 2026
16	CROM	Partial evidence	Gainesville, FL, United StatesHQ checked Sep 22, 2026	201-500	177 contacts →
	Partial evidence “CROM is a water infrastructure solutions provider dedicated to the innovation, design, construction, restoration, and maintenance of the nation’s essential infrastructure.” Source: RevenueBase Database · checked Sep 22, 2026
17	Smith & Loveless INC	Partial evidence	Lenexa, KS, United StatesHQ checked Sep 22, 2026	201-500	172 contacts →
	Partial evidence “S&L delivers long-lasting, reliable and easy-to-operate wastewater pumping and treatment systems for municipal, federal, and industrial-commercial applications.” Source: RevenueBase Database · checked Sep 22, 2026
18	Middlesex Water Company	Partial evidence	Iselin, NJ, United StatesHQ checked Sep 22, 2026	201-500	156 contacts →
	Partial evidence “Middlesex Water Company (NASDAQ:MSEX) provides a full range of regulated and non-regulated water, wastewater utility and related services primarily in New Jersey and Delaware.” Source: RevenueBase Database · checked Sep 22, 2026
19	Boudreau Pipeline	Indirect evidence	Corona, CA, United StatesHQ checked Sep 22, 2026	201-500	152 contacts →
	Indirect evidence “Boudreau Pipeline Corporation has completed conventional and highly complex pipeline projects for Southern California’s leading builders, municipalities, utilities and contractors.” Source: RevenueBase Database · checked Sep 22, 2026
20	LB Water	Partial evidence	Selinsgrove, PA, United StatesHQ checked Sep 22, 2026	201-500	147 contacts →
	Partial evidence “100% Employee Owned LB Water has been providing quality water and wastewater solutions for decades.” Source: RevenueBase Database · checked Sep 22, 2026
21	Aqualis	Partial evidence	Morrisville, NC, United StatesHQ checked Sep 22, 2026	501-1,000	136 contacts →
	Partial evidence “AQUALIS is the national leader in water management, compliance and engineering, helping businesses meet complex water regulations while protecting long-term infrastructure.” Source: RevenueBase Database · checked Sep 22, 2026
22	Water Works Engineers	Partial evidence	Scottsdale, AZ, United StatesHQ checked Sep 22, 2026	51-200	135 contacts →
	Partial evidence “Water Works Engineers is a leading civil and environmental engineering firm specializing in innovative and sustainable solutions for water infrastructure projects across the…” Source: RevenueBase Database · checked Sep 22, 2026
23	Donohue & Associates, INC	Partial evidence	Sheboygan, WI, United StatesHQ checked Sep 22, 2026	51-200	129 contacts →
	Partial evidence “Donohue & Associates is an employee-owned, multi-disciplined engineering firm dedicated to one focus: water.” Source: RevenueBase Database · checked Sep 22, 2026
24	Rice Lake Construction Group	Partial evidence	Deerwood, MN, United StatesHQ checked Sep 22, 2026	201-500	125 contacts →
	Partial evidence “At Rice Lake Construction Group, we know water.” Source: RevenueBase Database · checked Sep 22, 2026
25	Grand Strand Water & Sewer Authority	Partial evidence	Conway, SC, United StatesHQ checked Sep 22, 2026	201-500	113 contacts →
	Partial evidence “Water and Sewer Provider” Source: RevenueBase Database · checked Sep 22, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: water supply system companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names water supply system companies.
Partial evidence: Its own public description names part of water supply system companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name water supply system companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 903 water supply system companies based in the United States

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Water supply system companies based in the United States at a glance

As of Sep 22, 2026

49.9%Verified-email coverage

24.2Average contacts per company

11-50Median size (employees)

2.4%Largest-city concentration · Houston

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

337

11-50

359

51-200

146

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 903 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among water supply system companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “water supply system companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names water supply system companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among water supply system companies, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 10,923 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 22, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names water supply system companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many water supply system companies are there based in the United States?

RevenueBase identified 903 water supply system companies headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Core & Main, headquartered in St. Louis, tops this list with the largest team on record.

Which city has the most water supply system companies?

Houston leads with 22 headquartered companies, followed by Phoenix (8) and Tampa (8).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 10,923 verified decision-maker contacts tracked across these 903 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 22, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.