Company lists · Data refreshed September 2026

Top 25 Industrial water filtration companies based in the United States

Name: Industrial water filtration 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 17, 2026 1,984 companies tracked

RevenueBase identified 1,984 industrial water filtration companies headquartered in the United States as of September 2026 and tracks 42,774 professional contacts across them, including 14,944 with verified work emails. Houston is the largest hub.

This list covers industrial water filtration 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 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

1,984Companies

42,774Contacts tracked

14,944Verified emails

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The 25 largest industrial water filtration companies based in the United States

Ranked by team size

Top 25 of 1,984 industrial water filtration companies 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 filtration 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	Donaldson	Partial evidence	Bloomington, MN, United StatesHQ checked Sep 17, 2026	10001+	6,614 contacts →
	Partial evidence “Donaldson Company helps solve some of the world's most complex filtration and contamination control challenges.” Source: RevenueBase Database · checked Sep 17, 2026
2	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
3	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
4	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
5	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
6	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
7	Ecowater Systems LLC	Partial evidence	Woodbury, MN, United StatesHQ checked Sep 17, 2026	201-500	468 contacts →
	Partial evidence “Established in 1925, EcoWater Systems LLC is one of the world's largest manufacturers of residential water treatment systems.” Source: RevenueBase Database · checked Sep 17, 2026
8	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
9	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
10	Infiltrator Water Technologies Decentralized Wastewater Treatment Solutions	Indirect evidence	Old Saybrook, CT, United StatesHQ checked Sep 17, 2026	501-1,000	295 contacts →
	Indirect 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
11	Tencarva Machinery Company	Partial evidence	Greensboro, NC, United StatesHQ checked Sep 17, 2026	201-500	278 contacts →
	Partial evidence “Tencarva Machinery Company is a trusted equipment distributor, engineering and design partner, ISO 9001 manufacturer, and full-service repair provider serving industrial and…” Source: RevenueBase Database · checked Sep 17, 2026
12	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
13	Mott Corporation	Indirect evidence	Plainville, CT, United StatesHQ checked Sep 17, 2026	501-1,000	232 contacts →
	Indirect evidence “About Mott We work with the world's top companies to establish new standards of 'normal' in Medicine, Computing Power, Sustainable Energy, & Space Exploration.” Source: RevenueBase Database · checked Sep 17, 2026
14	Flanders Corporation	Partial evidence	Washington, NC, United StatesHQ checked Sep 17, 2026	1,001-5,000	227 contacts →
	Partial evidence “Flanders is a leading air filtration products manufacturer.” Source: RevenueBase Database · checked Sep 17, 2026
15	Micronics, NOW A Part Of Cleanova	Partial evidence	Chattanooga, TN, United StatesHQ checked Sep 17, 2026	1,001-5,000	210 contacts →
	Partial evidence “We are a worldwide expert in Liquid-Solid Separation & Air Filtration and a leading provider of Filter Media, Filter Presses, Vacuum Filters, Baghouse products, and expert Field…” Source: RevenueBase Database · checked Sep 17, 2026
16	Aqua-Aerobic Systems, INC	Indirect evidence	Loves Park, IL, United StatesHQ checked Sep 17, 2026	51-200	207 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
17	Newterra	Partial evidence	Coraopolis, PA, United StatesHQ checked Sep 17, 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 17, 2026
18	Graver Technologies, LLC	Strong evidence	Glasgow, DE, United StatesHQ checked Sep 17, 2026	201-500	184 contacts →
	Strong evidence “Graver Technologies, LLC serves the industrial filtration, separation and purification needs of companies around the globe.” Source: RevenueBase Database · checked Sep 17, 2026
19	Membrane Solutions	Partial evidence	Auburn, WA, United StatesHQ checked Sep 17, 2026	501-1,000	168 contacts →
	Partial evidence “Membrane Solutions, founded in 2006 in Seattle, USA, is a world-renowned supplier of membrane filtration products.” Source: RevenueBase Database · checked Sep 17, 2026
20	Aqua-Chem	Partial evidence	Knoxville, TN, United StatesHQ checked Sep 17, 2026	201-500	152 contacts →
	Partial evidence “Aqua-Chem is the leader in providing Global Water Solutions.” Source: RevenueBase Database · checked Sep 17, 2026
21	PECO	Strong evidence	Mineral Wells, TX, United StatesHQ checked Sep 17, 2026	10001+	144 contacts →
	Strong evidence “PECO is part of Parker Hannifin, Industrial Process Filtration Division.” Source: RevenueBase Database · checked Sep 17, 2026
22	Apex Water And Process	Strong evidence	St Michael, MN, United StatesHQ checked Sep 17, 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 17, 2026
23	Resintech INC	Partial evidence	Camden, NJ, United StatesHQ checked Sep 17, 2026	51-200	143 contacts →
	Partial evidence “ResinTech Inc, an acknowledged leader in ion exchange, manufactures a broad range of ion exchange resins for water and waste water treatment, including deionization,softening…” Source: RevenueBase Database · checked Sep 17, 2026
24	Cleanova	Partial evidence	Chattanooga, TN, United StatesHQ checked Sep 17, 2026	1,001-5,000	142 contacts →
	Partial evidence “Cleanova is a global filtration leader bringing together a portfolio of highly respected brands, including Micronics, Allied, Dollinger, SOLAFT, Plenty, and Vokes, among many…” Source: RevenueBase Database · checked Sep 17, 2026
25	Clack Corporation	Strong evidence	Windsor, WI, United StatesHQ checked Sep 17, 2026	201-500	142 contacts →
	Strong evidence “Established in 1944, Clack Corporation has been providing quality industrial water treatment products, commercial water treatment equipment and molded custom plastic containers.” 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 filtration 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 industrial water filtration companies.
Partial evidence: Its own public description names part of industrial water filtration companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name industrial water filtration 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 1,984 industrial water filtration companies based in the United States

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Industrial water filtration companies based in the United States at a glance

As of Sep 17, 2026

34.9%Verified-email coverage

21.6Average contacts per company

11-50Median size (employees)

1.9%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

878

11-50

731

51-200

254

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 1,984 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 filtration 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 “industrial water filtration 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 industrial water filtration 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 industrial water filtration 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, 14,944 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 filtration companies by metro

Industrial water filtration companies in Houston38

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 filtration 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 industrial water filtration companies are there based in the United States?

RevenueBase identified 1,984 industrial water filtration 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?

Donaldson, headquartered in Bloomington, tops this list with the largest team on record.

Which city has the most industrial water filtration companies?

Houston leads with 38 headquartered companies, followed by Austin (14) and Salt Lake City (14).

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 14,944 verified decision-maker contacts tracked across these 1,984 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.