Company lists · Data refreshed September 2026

Top 25 Membrane filtration system providers based in the United States

Name: Membrane filtration system providers 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 537 companies tracked

RevenueBase identified 537 membrane filtration system providers headquartered in the United States as of September 2026 and tracks 7,838 professional contacts across them, including 2,731 with verified work emails. Houston is the largest hub.

This list covers membrane filtration system providers 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

537Companies

7,838Contacts tracked

2,731Verified emails

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The 25 largest membrane filtration system providers based in the United States

Ranked by team size

Top 25 of 537 membrane filtration system providers 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 system providers: 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	Aquatech	Indirect evidence	Canonsburg, PA, United StatesHQ checked Sep 20, 2026	501-1,000	903 contacts →
	Indirect 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 20, 2026
2	Westech Engineering	Indirect evidence	Salt Lake City, UT, United StatesHQ checked Sep 20, 2026	501-1,000	554 contacts →
	Indirect 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 20, 2026
3	Meissner	Partial evidence	Camarillo, CA, United StatesHQ checked Sep 20, 2026	501-1,000	373 contacts →
	Partial evidence “Meissner manufactures advanced microfiltration and single-use systems.” Source: RevenueBase Database · checked Sep 20, 2026
4	Culligan By Waterco	Partial evidence	Lombard, IL, United StatesHQ checked Sep 20, 2026	501-1,000	265 contacts →
	Partial 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 20, 2026
5	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
6	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
7	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
8	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
9	Lakos Filtration Solutions	Partial evidence	Fresno, CA, United StatesHQ checked Sep 20, 2026	51-200	73 contacts →
	Partial evidence “In 1972, LAKOS was founded on the belief that filtering water should be simple – both for the people who operate filtration equipment and the environment.” Source: RevenueBase Database · checked Sep 20, 2026
10	Paragon Water Systems INC	Strong evidence	Tampa, FL, United StatesHQ checked Sep 20, 2026	201-500	73 contacts →
	Strong 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
11	Clear Water Services	Indirect evidence	Everett, WA, United StatesHQ checked Sep 20, 2026	51-200	72 contacts →
	Indirect evidence “Clear Water Services provides innovative stormwater, groundwater, and process water solutions custom-designed for each client's unique goals, challenges, and mission.” Source: RevenueBase Database · checked Sep 20, 2026
12	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
13	Marlo Incorporated	Indirect evidence	Racine, WI, United StatesHQ checked Sep 20, 2026	51-200	62 contacts →
	Indirect evidence “For 50 years, Marlo Incorporated has engineered and manufactured high quality water treatment equipment for a wide variety of residential, commercial, and industrial applications.” Source: RevenueBase Database · checked Sep 20, 2026
14	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
15	Wigen Water Technologies	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 20, 2026	51-200	62 contacts →
	Partial 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
16	Puragain Water	Strong evidence	Escondido, CA, United StatesHQ checked Sep 20, 2026	11-50	62 contacts →
	Strong 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
17	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
18	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
19	Emco Group	Indirect evidence	Canton, MA, United StatesHQ checked Sep 20, 2026	51-200	60 contacts →
	Indirect evidence “EMCO Group is a well-established company with over 44 years of experience in the water and wastewater treatment industry.” Source: RevenueBase Database · checked Sep 20, 2026
20	Ameriwater	Indirect evidence	Dayton, OH, United StatesHQ checked Sep 20, 2026	51-200	59 contacts →
	Indirect evidence “AmeriWater is the recognized specialist in the design, manufacturing, installation and supply of water treatment equipment and services.” Source: RevenueBase Database · checked Sep 20, 2026
21	Clear Creek Systems	Partial evidence	Bakersfield, CA, United StatesHQ checked Sep 20, 2026	51-200	54 contacts →
	Partial evidence “Clear Creek Systems is a leading provider of water treatment systems and services.” Source: RevenueBase Database · checked Sep 20, 2026
22	Rosedale Products, INC	Indirect evidence	Ann Arbor, MI, United StatesHQ checked Sep 20, 2026	51-200	54 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
23	Charger Water Treatment Products	Indirect evidence	Morton Grove, IL, United StatesHQ checked Sep 20, 2026	51-200	51 contacts →
	Indirect evidence “No matter what your water problem, Charger Water Treatment Products has a solution.” Source: RevenueBase Database · checked Sep 20, 2026
24	Puronics	Partial evidence	Livermore, CA, United StatesHQ checked Sep 20, 2026	51-200	51 contacts →
	Partial evidence “Manufacturer of a complete line of water treatment systems for homes and businesses.” Source: RevenueBase Database · checked Sep 20, 2026
25	Solecta, INC	Partial evidence	Oceanside, CA, United StatesHQ checked Sep 20, 2026	51-200	49 contacts →
	Partial evidence “At Solecta, we combine our deep understanding of membrane applications, high-value separation processes and our client's needs to quickly develop solutions that deliver proven…” 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 system providers. 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 system providers.
Partial evidence: Its own public description names part of membrane filtration system providers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name membrane filtration system providers. 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 537 membrane filtration system providers based in the United States

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Membrane filtration system providers based in the United States at a glance

As of Sep 20, 2026

34.8%Verified-email coverage

14.6Average contacts per company

11-50Median size (employees)

2.8%Largest-city concentration · Houston

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

242

11-50

193

51-200

201-500

501-1,000

1,001-5,000

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 537 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 system providers, 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 system providers”. 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 system providers), 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 system providers, 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, 2,731 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 system providers, 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 system providers are there based in the United States?

RevenueBase identified 537 membrane filtration system providers 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?

Aquatech, headquartered in Canonsburg, tops this list with the largest team on record.

Which city has the most membrane filtration system providers?

Houston leads with 15 headquartered companies, followed by Tampa (6) and Tucson (6).

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 2,731 verified decision-maker contacts tracked across these 537 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.