Company lists · Data refreshed September 2026

Top 25 Industrial water treatment based in the United States

Name: Industrial water treatment based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 2,395 companies tracked

RevenueBase identified 2,395 industrial water treatment headquartered in the United States as of September 2026 and tracks 82,023 professional contacts across them, including 31,018 with verified work emails. Houston is the largest hub.

This list covers industrial water treatment 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 17, 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 17, 2026 86% judged on-target in blind review

2,395Companies

82,023Contacts tracked

31,018Verified emails

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The 25 largest industrial water treatment based in the United States

Ranked by team size

Top 25 of 2,395 industrial water treatment based in the United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to industrial water treatment: 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	Nalco Water, An Ecolab Company	Strong evidence	Naperville, IL, United StatesHQ checked Sep 17, 2026	10001+	11,500 contacts →
	Strong evidence “A global leader in water and process management solutions, Nalco Water, an Ecolab company, works with customers across a wide range of industries to help meet their specific…” Source: RevenueBase Database · checked Sep 17, 2026
2	XYLEM	Partial evidence	Washington, DC, United StatesHQ checked Sep 17, 2026	10001+	9,320 contacts →
	Partial evidence “Xylem is the global leader in advanced technologies, solutions and services that address the world’s biggest water challenges.” Source: RevenueBase Database · checked Sep 17, 2026
3	Solenis	Partial evidence	Wilmington, DE, United StatesHQ checked Sep 17, 2026	10001+	6,128 contacts →
	Partial evidence “Solenis is a leading global provider of water and hygiene solutions.” Source: RevenueBase Database · checked Sep 17, 2026
4	Pall Corporation	Indirect evidence	Port Washington, NY, United StatesHQ checked Sep 17, 2026	5,001-10,000	4,495 contacts →
	Indirect evidence “Our global associates are unified by a singular drive: to take on our customers’ biggest challenges.” Source: RevenueBase Database · checked Sep 17, 2026
5	NCH	Partial evidence	Wilmington, DE, United StatesHQ checked Sep 17, 2026	10001+	2,361 contacts →
	Partial evidence “Cleaning water, conserving energy and delivering maintenance solutions since 1919.” Source: RevenueBase Database · checked Sep 17, 2026
6	Culligan International	Partial evidence	Rosemont, IL, United StatesHQ checked Sep 17, 2026	10001+	1,830 contacts →
	Partial evidence “There’s nothing more fundamental to life on Earth than water.” Source: RevenueBase Database · checked Sep 17, 2026
7	Select Water Solutions	Strong evidence	Gainesville, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,605 contacts →
	Strong evidence “Select is a leader in water management and chemical technology to our customers in the oil and gas industry, as well as in other industrial applications.” Source: RevenueBase Database · checked Sep 17, 2026
8	Chemtreat	Partial evidence	Glen Allen, VA, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,404 contacts →
	Partial evidence “At ChemTreat, we understand that water is a vital resource for our planet.” Source: RevenueBase Database · checked Sep 17, 2026
9	Aquatech	Partial evidence	Canonsburg, PA, United StatesHQ checked Sep 17, 2026	501-1,000	903 contacts →
	Partial evidence “Aquatech enables the world's most recognized companies to solve complex challenges in water reuse, desalination, minimal and zero liquid discharge, and critical minerals…” Source: RevenueBase Database · checked Sep 17, 2026
10	Dubois Chemicals, INC	Indirect evidence	Sharonville, OH, United StatesHQ checked Sep 17, 2026	1,001-5,000	884 contacts →
	Indirect evidence “DuBois has been serving customers since 1920.” Source: RevenueBase Database · checked Sep 17, 2026
11	Chem-Aqua, INC	Indirect evidence	Wilmington, DE, United StatesHQ checked Sep 17, 2026	10001+	864 contacts →
	Indirect evidence “Chem-Aqua is a unique combination of knowledge, experience and stability.” Source: RevenueBase Database · checked Sep 17, 2026
12	Gradiant	Partial evidence	Woburn, MA, United StatesHQ checked Sep 17, 2026	1,001-5,000	813 contacts →
	Partial evidence “Gradiant is a Different Kind of Water Company.” Source: RevenueBase Database · checked Sep 17, 2026
13	Ceco Environmental Corporation	Partial evidence	Addison, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	646 contacts →
	Partial evidence “CECO Environmental is a leading environmentally focused, diversified industrial company whose solutions protect people, the environment, and industrial equipment across the globe…” Source: RevenueBase Database · checked Sep 17, 2026
14	Westech Engineering	Strong evidence	Salt Lake City, UT, United StatesHQ checked Sep 17, 2026	501-1,000	554 contacts →
	Strong 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 17, 2026
15	Evergreen North America Industrial Services	Partial evidence	La Porte, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	468 contacts →
	Partial evidence “Evergreen North America Industrial Services offers a comprehensive range of Industrial Services for oil refineries, petrochemical plants, power generation plants, manufacturing…” Source: RevenueBase Database · checked Sep 17, 2026
16	UCC Environmental	Partial evidence	Waukegan, IL, United StatesHQ checked Sep 17, 2026	201-500	389 contacts →
	Partial evidence “UCC Environmental (UCC) is a global leader in environmental solutions for solids handling, wastewater treatment and pollution control technologies in power generation and other…” Source: RevenueBase Database · checked Sep 17, 2026
17	Culligan Water	Partial evidence	Jacksonville, FL, United StatesHQ checked Sep 17, 2026	51-200	354 contacts →
	Partial evidence “At Culligan Water Conditioning of Jacksonville FL, we not only aim to provide better water to the community, we are also committed to building a better, more sustainable world.” Source: RevenueBase Database · checked Sep 17, 2026
18	Parkson Corporation	Strong evidence	Fort Lauderdale, FL, United StatesHQ checked Sep 17, 2026	51-200	317 contacts →
	Strong evidence “Parkson Corporation is a supplier of innovative, cost effective solutions for potable water, process water, and industrial and municipal wastewater treatment.” Source: RevenueBase Database · checked Sep 17, 2026
19	Infiltrator Water Technologies Decentralized Wastewater Treatment Solutions	Partial evidence	Old Saybrook, CT, United StatesHQ checked Sep 17, 2026	501-1,000	295 contacts →
	Partial evidence “Protecting the environment with innovative wastewater treatment solutions for over 35 years, Infiltrator is the leading manufacturer of onsite wastewater treatment products in…” Source: RevenueBase Database · checked Sep 17, 2026
20	Packard Culligan Water	Partial evidence	Minnetonka, MN, United StatesHQ checked Sep 17, 2026	501-1,000	272 contacts →
	Partial evidence “Packard Culligan Water is a family-owned company with values based on relationships, unity, listening, and leading locally.” Source: RevenueBase Database · checked Sep 17, 2026
21	Keystone Clearwater Solutions	Partial evidence	Hershey, PA, United StatesHQ checked Sep 17, 2026	501-1,000	268 contacts →
	Partial evidence “Keystone Clearwater Solutions is moving water forward with engineered solutions for safer, more efficient water transfer, water management, and environmental services.” Source: RevenueBase Database · checked Sep 17, 2026
22	Valicor	Indirect evidence	Monroe, OH, United StatesHQ checked Sep 17, 2026	201-500	254 contacts →
	Indirect evidence “Valicor is a trusted partner for sustainable waste management solutions.” Source: RevenueBase Database · checked Sep 17, 2026
23	Chemsearch FE	Partial evidence	Irving, TX, United StatesHQ checked Sep 17, 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 17, 2026
24	Prominent North America	Strong evidence	Pit, United StatesHQ checked Sep 17, 2026	201-500	251 contacts →
	Strong evidence “ProMinent North America is part of the global ProMinent Group, a pioneer in metering technology and water treatment solutions with roots in Heidelberg, Germany.” Source: RevenueBase Database · checked Sep 17, 2026
25	Johnson Screens, A Brand Of Aqseptence Group	Indirect evidence	New Brighton, MN, United StatesHQ checked Sep 17, 2026	201-500	249 contacts →
	Indirect evidence “Johnson Screens is the leading global provider of screening and auxiliary solutions.” Source: RevenueBase Database · checked Sep 17, 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: industrial water treatment. 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 industrial water treatment.
Partial evidence: Its own public description names part of industrial water treatment, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name industrial water treatment. 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 2,395 industrial water treatment based in the United States

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Industrial water treatment based in the United States at a glance

As of Sep 17, 2026

37.8%Verified-email coverage

34.2Average contacts per company

11-50Median size (employees)

3.0%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

1,057

11-50

874

51-200

301

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 2,395 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 industrial water treatment, 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 “industrial water treatment”. 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 industrial water treatment), 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 industrial water treatment, 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, 31,018 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 17, 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.

Industrial water treatment by metro

Industrial water treatment in Houston71

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 industrial water treatment, 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 industrial water treatment are there based in the United States?

RevenueBase identified 2,395 industrial water treatment 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?

Nalco Water, An Ecolab Company, headquartered in Naperville, tops this list with the largest team on record.

Which city has the most industrial water treatment?

Houston leads with 71 headquartered companies, followed by Phoenix (20) and Tampa (19).

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 31,018 verified decision-maker contacts tracked across these 2,395 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 17, 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.