Company lists · Data refreshed September 2026

Top 25 Membrane filtration companies based in the United States

Name: Membrane 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 20, 2026 620 companies tracked

RevenueBase identified 620 membrane filtration companies headquartered in the United States as of September 2026 and tracks 16,424 professional contacts across them, including 6,141 with verified work emails. Houston is the largest hub.

This list covers membrane 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 20, 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 20, 2026 86% judged on-target in blind review

620Companies

16,424Contacts tracked

6,141Verified emails

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The 25 largest membrane filtration companies based in the United States

Ranked by team size

Top 25 of 620 membrane filtration companies based in the United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to membrane 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	Pall Corporation	Indirect evidence	Port Washington, NY, United StatesHQ checked Sep 20, 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 20, 2026
2	Repligen Corporation	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,254 contacts →
	Indirect evidence “Repligen, a global, bioprocessing-focused life sciences company, provides innovative solutions for the advancement of biotherapeutic manufacturing.” Source: RevenueBase Database · checked Sep 20, 2026
3	Filtration Group	Partial evidence	Oakbrook Terrace, IL, United StatesHQ checked Sep 20, 2026	5,001-10,000	562 contacts →
	Partial evidence “Filtration Group is a global market-leading provider of filtration consumables that are designed to drive innovation and deliver solutions across a broad spectrum of applications…” Source: RevenueBase Database · checked Sep 20, 2026
4	Meissner	Indirect evidence	Camarillo, CA, United StatesHQ checked Sep 20, 2026	501-1,000	373 contacts →
	Indirect evidence “Meissner manufactures advanced microfiltration and single-use systems.” Source: RevenueBase Database · checked Sep 20, 2026
5	Mott Corporation	Indirect evidence	Plainville, CT, United StatesHQ checked Sep 20, 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 20, 2026
6	Flanders Corporation	Partial evidence	Washington, NC, United StatesHQ checked Sep 20, 2026	1,001-5,000	227 contacts →
	Partial evidence “Flanders is a leading air filtration products manufacturer.” Source: RevenueBase Database · checked Sep 20, 2026
7	Micronics, NOW A Part Of Cleanova	Partial evidence	Chattanooga, TN, United StatesHQ checked Sep 20, 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 20, 2026
8	Graver Technologies, LLC	Partial evidence	Glasgow, DE, United StatesHQ checked Sep 20, 2026	201-500	184 contacts →
	Partial evidence “Graver Technologies, LLC serves the industrial filtration, separation and purification needs of companies around the globe.” Source: RevenueBase Database · checked Sep 20, 2026
9	Membrane Solutions	Strong evidence	Auburn, WA, United StatesHQ checked Sep 20, 2026	501-1,000	168 contacts →
	Strong evidence “Membrane Solutions, founded in 2006 in Seattle, USA, is a world-renowned supplier of membrane filtration products.” Source: RevenueBase Database · checked Sep 20, 2026
10	Cleanova	Partial evidence	Chattanooga, TN, United StatesHQ checked Sep 20, 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 20, 2026
11	Asahi Kasei Bioprocess America, INC	Indirect evidence	Glenview, IL, United StatesHQ checked Sep 20, 2026	51-200	127 contacts →
	Indirect evidence “As a global partner to the biopharmaceutical industry, Asahi Kasei Bioprocess helps biologics manufacturers safely and efficiently produce medicines that patients can trust, by…” Source: RevenueBase Database · checked Sep 20, 2026
12	Komline	Indirect evidence	Peapack, NJ, United StatesHQ checked Sep 20, 2026	501-1,000	113 contacts →
	Indirect evidence “Komline is a global leader in advanced Separation Technologies, delivering innovative equipment that keeps industries running and communities thriving.” Source: RevenueBase Database · checked Sep 20, 2026
13	Clarcor	Indirect evidence	Cleveland, OH, United StatesHQ checked Sep 20, 2026	10001+	110 contacts →
	Indirect evidence “No future updates will be made to this page.” Source: RevenueBase Database · checked Sep 20, 2026
14	KX Technologies	Partial evidence	West Haven, CT, United StatesHQ checked Sep 20, 2026	51-200	102 contacts →
	Partial evidence “KX Technologies is your Global Filtration Partner.” Source: RevenueBase Database · checked Sep 20, 2026
15	Pureflow, INC	Indirect evidence	Graham, NC, United StatesHQ checked Sep 20, 2026	51-200	94 contacts →
	Indirect evidence “Why Pureflow?” Source: RevenueBase Database · checked Sep 20, 2026
16	Zwitterco	Partial evidence	Woburn, MA, United StatesHQ checked Sep 20, 2026	51-200	83 contacts →
	Partial evidence “ZwitterCo is the global leader in membrane solutions for challenging separations, helping industries treat complex wastewater, purify water for reuse, and maximize efficiency in…” Source: RevenueBase Database · checked Sep 20, 2026
17	Samco Technologies	Indirect evidence	Buffalo, NY, United StatesHQ checked Sep 20, 2026	51-200	82 contacts →
	Indirect evidence “At SAMCO Technologies, Inc, we provide cutting-edge water, wastewater, and process separation solutions for some of the world’s most demanding industries, including power…” Source: RevenueBase Database · checked Sep 20, 2026
18	Fresh Water Systems	Partial evidence	Greenville, SC, United StatesHQ checked Sep 20, 2026	51-200	76 contacts →
	Partial evidence “Fresh Water Systems is a relationally-driven provider of filtration solutions that leverage expertise and intentionality to connect with conscientious businesses and consumers.” Source: RevenueBase Database · checked Sep 20, 2026
19	Paragon Water Systems INC	Partial evidence	Tampa, FL, United StatesHQ checked Sep 20, 2026	201-500	73 contacts →
	Partial evidence “Paragon Water Systems partners with appliance brands, foodservice operators, and industrial companies that require a reliable, scalable ODM/OEM water filtration manufacturer.” Source: RevenueBase Database · checked Sep 20, 2026
20	Complete Filtration Resources, INC	Strong evidence	Marshfield, WI, United StatesHQ checked Sep 20, 2026	11-50	62 contacts →
	Strong evidence “We design and manufacture a full line of components for our membrane filtration & wastewater systems.Together with our fabrication and installation partners around the world we…” Source: RevenueBase Database · checked Sep 20, 2026
21	Nanostone Water	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 20, 2026	51-200	62 contacts →
	Indirect evidence “At Nanostone Water, we believe in economically solving the world's water needs.” Source: RevenueBase Database · checked Sep 20, 2026
22	Wigen Water Technologies	Indirect evidence	Minneapolis, MN, United StatesHQ checked Sep 20, 2026	51-200	62 contacts →
	Indirect evidence “Founded in 1965, Wigen Water Technologies® is a global leader in the production of custom water treatment systems, specializing in cost-effective and reliable solutions for…” Source: RevenueBase Database · checked Sep 20, 2026
23	Puragain Water	Partial evidence	Escondido, CA, United StatesHQ checked Sep 20, 2026	11-50	62 contacts →
	Partial evidence “Puragain Water is a family owned business that takes pride in offering the very best in water filtration systems.” Source: RevenueBase Database · checked Sep 20, 2026
24	AWC American Water Chemicals	Partial evidence	Plant City, FL, United StatesHQ checked Sep 20, 2026	51-200	61 contacts →
	Partial evidence “American Water Chemicals® (AWC) was created in 1993 by a group of membrane desalination experts in response to the demand for more reliable water treatment chemicals and…” Source: RevenueBase Database · checked Sep 20, 2026
25	QUA	Partial evidence	Canonsburg, PA, United StatesHQ checked Sep 20, 2026	51-200	61 contacts →
	Partial evidence “QUA®, with our headquarters in the USA, develops, manufactures and markets advanced membrane products for water, waste water and water reuse applications to leading OEM's…” Source: RevenueBase Database · checked Sep 20, 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: membrane 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 membrane filtration companies.
Partial evidence: Its own public description names part of membrane filtration companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name membrane 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 620 membrane filtration companies based in the United States

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Membrane filtration companies based in the United States at a glance

As of Sep 20, 2026

37.4%Verified-email coverage

26.5Average contacts per company

11-50Median size (employees)

2.4%Largest-city concentration · Houston

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

226

11-50

246

51-200

101

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 620 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 membrane 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 “membrane 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 membrane 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 membrane 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, 6,141 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 20, 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 membrane 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 membrane filtration companies are there based in the United States?

RevenueBase identified 620 membrane 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?

Pall Corporation, headquartered in Port Washington, tops this list with the largest team on record.

Which city has the most membrane filtration companies?

Houston leads with 15 headquartered companies, followed by Tampa (6) and Ann Arbor (5).

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 6,141 verified decision-maker contacts tracked across these 620 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 20, 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.