Company lists · Data refreshed September 2026

Top 25 Building water management system contractors based in the United States

Name: Building water management system contractors based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 1,022 companies tracked

RevenueBase identified 1,022 building water management system contractors headquartered in the United States as of September 2026 and tracks 20,799 professional contacts across them, including 9,077 with verified work emails. Houston is the largest hub.

This list covers building water management system contractors 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 16, 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 16, 2026 86% judged on-target in blind review

1,022Companies

20,799Contacts tracked

9,077Verified emails

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The 25 largest building water management system contractors based in the United States

Ranked by team size

Top 25 of 1,022 building water management system contractors based in the United States, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to building water management system contractors: 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	Watts Water Technologies	Partial evidence	North Andover, MA, United StatesHQ checked Sep 16, 2026	5,001-10,000	2,503 contacts →
	Partial evidence “We are a global leader of quality water solutions for residential, industrial, municipal, and commercial settings.” Source: RevenueBase Database · checked Sep 16, 2026
2	Core & Main	Indirect evidence	St. Louis, MO, United StatesHQ checked Sep 16, 2026	1,001-5,000	2,165 contacts →
	Indirect evidence “Based in St.” Source: RevenueBase Database · checked Sep 16, 2026
3	Mckenney's, INC	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,077 contacts →
	Indirect evidence “McKenney’s is the Southeast’s most trusted name in facility construction, operation and maintenance.” Source: RevenueBase Database · checked Sep 16, 2026
4	MWH	Indirect evidence	Broomfield, CO, United StatesHQ checked Sep 16, 2026	501-1,000	428 contacts →
	Indirect evidence “As a leading U.S.” Source: RevenueBase Database · checked Sep 16, 2026
5	United Mechanical	Partial evidence	San Jose, CA, United StatesHQ checked Sep 16, 2026	201-500	346 contacts →
	Partial evidence “United Mechanical specializes in HVAC and Plumbing systems design, construction, retrofit, repair, and 24/7 emergency service for commercial and industrial properties throughout…” Source: RevenueBase Database · checked Sep 16, 2026
6	ZURN	Indirect evidence	Milwaukee, WI, United StatesHQ checked Sep 16, 2026	501-1,000	324 contacts →
	Indirect evidence “We build value and trust by solving for our customers and their challenges.” Source: RevenueBase Database · checked Sep 16, 2026
7	Etna Supply	Partial evidence	Grand Rapids, MI, United StatesHQ checked Sep 16, 2026	501-1,000	303 contacts →
	Partial 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 16, 2026
8	Culligan By Waterco	Strong evidence	Lombard, IL, United StatesHQ checked Sep 16, 2026	501-1,000	265 contacts →
	Strong evidence “Culligan has over 80 years of experience in the design and distribution of water treatment systems for residential, commercial and industrial applications.” Source: RevenueBase Database · checked Sep 16, 2026
9	Chemsearch FE	Partial evidence	Irving, TX, United StatesHQ checked Sep 16, 2026	1,001-5,000	251 contacts →
	Partial evidence “Chemsearch FE’s mission is simple-to help facilities save water, energy and reduce operating costs.” Source: RevenueBase Database · checked Sep 16, 2026
10	HD Fowler Company	Indirect evidence	Bellevue, WA, United StatesHQ checked Sep 16, 2026	501-1,000	236 contacts →
	Indirect evidence “HD Fowler Company is one of the oldest and largest independent, fourth-generation family-owned distributors of waterworks, irrigation and landscape, pumps, mechanical, and…” Source: RevenueBase Database · checked Sep 16, 2026
11	Holaday-Parks, INC	Partial evidence	Tukwila, WA, United StatesHQ checked Sep 16, 2026	201-500	218 contacts →
	Partial evidence “As one of the largest full service mechanical contractors headquartered in the Pacific Northwest, Holaday Parks has grown well beyond Seattle.” Source: RevenueBase Database · checked Sep 16, 2026
12	Tweet Garot Mechanical, INC	Indirect evidence	De Pere, WI, United StatesHQ checked Sep 16, 2026	501-1,000	207 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
13	Ulliman Schutte Construction	Partial evidence	Miamisburg, OH, United StatesHQ checked Sep 16, 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 16, 2026
14	Emcor Services NEW England Mechanical	Partial evidence	Windsor, CT, United StatesHQ checked Sep 16, 2026	201-500	195 contacts →
	Partial evidence “EMCOR Services New England Mechanical Services (NEMSI) offers a full range of mechanical, electrical, plumbing, sheetmetal, building automation, and facilities services that…” Source: RevenueBase Database · checked Sep 16, 2026
15	L&s Mechanical	Partial evidence	Richardson, TX, United StatesHQ checked Sep 16, 2026	501-1,000	186 contacts →
	Partial evidence “L&S Mechanical began as a Dallas-based contractor in 1985 and has grown over the years to have six locations out of Dallas, Fort Worth, Houston, San Antonio, and Austin.” Source: RevenueBase Database · checked Sep 16, 2026
16	Comprehensive Energy Services, INC	Partial evidence	Longwood, FL, United StatesHQ checked Sep 16, 2026	201-500	181 contacts →
	Partial evidence “Founded in 1992, Comprehensive Energy Services, Inc.(CES) is a family-owned and operated, award-winning mechanical and plumbing contractor proudly serving the entire state of…” Source: RevenueBase Database · checked Sep 16, 2026
17	Felix Construction Company	Strong evidence	Phoenix, AZ, United StatesHQ checked Sep 16, 2026	201-500	178 contacts →
	Strong 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 16, 2026
18	Metro Group	Partial evidence	Long Island City, NY, United StatesHQ checked Sep 16, 2026	201-500	166 contacts →
	Partial evidence “Metro Group Has Been the Trusted Source for Building Solutions Since 1925 Metro Group is a leading provider of comprehensive building services along the East Coast.” Source: RevenueBase Database · checked Sep 16, 2026
19	Apex Water And Process	Strong evidence	St Michael, MN, United StatesHQ checked Sep 16, 2026	201-500	143 contacts →
	Strong evidence “Apex, a trusted leader in water and process management, delivers integrated solutions that empower agricultural, commercial, and industrial customers across the U.S.” Source: RevenueBase Database · checked Sep 16, 2026
20	Aqualis	Strong evidence	Morrisville, NC, United StatesHQ checked Sep 16, 2026	501-1,000	136 contacts →
	Strong 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 16, 2026
21	Rice Lake Construction Group	Partial evidence	Deerwood, MN, United StatesHQ checked Sep 16, 2026	201-500	125 contacts →
	Partial evidence “At Rice Lake Construction Group, we know water.” Source: RevenueBase Database · checked Sep 16, 2026
22	The PAR Group	Indirect evidence	New York, NY, United StatesHQ checked Sep 16, 2026	201-500	117 contacts →
	Indirect evidence “The PAR Group, privately owned and operated since 1917, is New York's preeminent provider of Plumbing, Heating & Air Conditioning, Fire Protection and Green Solutions services.” Source: RevenueBase Database · checked Sep 16, 2026
23	Iron Mechanical	Indirect evidence	Sacramento, CA, United StatesHQ checked Sep 16, 2026	201-500	113 contacts →
	Indirect evidence “We specialize in providing HVAC, plumbing, and piping design and installation services across the state of California.” Source: RevenueBase Database · checked Sep 16, 2026
24	Stormtrap	Indirect evidence	Romeoville, IL, United StatesHQ checked Sep 16, 2026	51-200	112 contacts →
	Indirect evidence “StormTrap offers proven, leading-edge solutions for managing runoff, protecting waterways and improving the use of your property.” Source: RevenueBase Database · checked Sep 16, 2026
25	GSE Construction Company, INC	Partial evidence	Livermore, CA, United StatesHQ checked Sep 16, 2026	201-500	112 contacts →
	Partial evidence “Over the past 45 years, GSE Construction has completed more than projects as a general engineering contractor.” Source: RevenueBase Database · checked Sep 16, 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: building water management system contractors. 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 building water management system contractors.
Partial evidence: Its own public description names part of building water management system contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name building water management system contractors. 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 1,022 building water management system contractors based in the United States

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Building water management system contractors based in the United States at a glance

As of Sep 16, 2026

43.6%Verified-email coverage

20.4Average contacts per company

11-50Median size (employees)

1.6%Largest-city concentration · Houston

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

429

11-50

380

51-200

160

201-500

501-1,000

1,001-5,000

5,001-10,000

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 1,022 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 building water management system contractors, 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 “building water management system contractors”. 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 building water management system contractors), 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 building water management system contractors, 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, 9,077 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 16, 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 building water management system contractors, 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 building water management system contractors are there based in the United States?

RevenueBase identified 1,022 building water management system contractors 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?

Watts Water Technologies, headquartered in North Andover, tops this list with the largest team on record.

Which city has the most building water management system contractors?

Houston leads with 16 headquartered companies, followed by Austin (10) and Phoenix (9).

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 9,077 verified decision-maker contacts tracked across these 1,022 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 16, 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.