Company lists · Data refreshed September 2026
Top 25 Once through cooling water treatment worldwide
RevenueBase identified 1,794 once through cooling water treatment worldwide as of September 2026 and tracks 18,929 professional contacts across them, including 4,798 with verified work emails. The United States is the largest market and Dubai the largest hub.
This list covers once through cooling water treatment worldwide, 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. Country and city lists for once through cooling water treatment follow the table.
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.
The 25 largest once through cooling water treatment worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,404 contacts → | ||||
Partial evidence “At ChemTreat, we understand that water is a vital resource for our planet.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 864 contacts → | ||||
Indirect evidence “Chem-Aqua is a unique combination of knowledge, experience and stability.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 330 contacts → | ||||
Strong evidence “Vasu Chemicals LLP is India's leading industrial water treatment solutions provider.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 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 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 252 contacts → | ||||
Strong evidence “Chembond Water Technologies Limited specializes in delivering advanced water treatment solutions for industrial and institutional applications.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 221 contacts → | ||||
Indirect evidence “Esli PWG Ltd.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 129 contacts → | ||||
Partial evidence “ADEY is working towards a future where every heating and cooling system is protected from corrosion; saving money, energy and time across the globe.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 128 contacts → | ||||
Strong evidence “Magnus designs and delivers chemical, mechanical and technological water treatment solutions, industrial fluids, equipment, and technical services across North America and Europe.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 125 contacts → | ||||
Strong evidence “Ekopak provides innovative solutions for industrial water treatment and wastewater treatment.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 119 contacts → | ||||
Partial evidence “Established in 1932 and headquartered in Newton, Massachusetts, Barclay Water Management, Inc.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 117 contacts → | ||||
Strong evidence “AVANTech, LLC is a comprehensive industrial water treatment solutions provider.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 115 contacts → | ||||
Indirect evidence “Wasser ist nicht nur eine kostbare Lebensressource, sondern auch eine der großen Herausforderungen dieses Jahrhunderts.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 110 contacts → | ||||
Strong evidence “HOH is a leading water treatment chemical and service company, working to establish the new water technology standard at over facilities across the United States.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 101 contacts → | ||||
Partial evidence “Since 2006, ODYSSEE Environnement has been committed to ethical and sustainable water management in the service of industrial performance.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 95 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 85 contacts → | ||||
Strong evidence “Water Bird is a water treatment, wastewater treatment, desalination, water recycling, laboratory testing, specialty chemicals, operations and maintenance, and environmental…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 83 contacts → | ||||
Indirect evidence “Wir sind der Experte für industrielle Wasseraufbereitung und Wasserbehandlung und bieten unseren Kunden aus Schlüsselindustrien einen Produktmix aus innovativer Anlagentechnik…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 82 contacts → | ||||
Partial 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, 2026Thanks. The Data Team will review it. | |||||
| 19 | 80 contacts → | ||||
Strong evidence “Water Treatment Services solves complex water problems using intelligent technologies and a whole-of-system approach to make water fit for use, reuse and release.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 79 contacts → | ||||
Strong evidence “Feedwater Ltd is a UK Water Treatment Company, established in 1976 specifically to supply products and services for the treatment of water for steam boilers, cooling towers…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 78 contacts → | ||||
Partial evidence “Our solutions allow our clients to recycle and reuse water, improve operational efficiencies and reduce their environmental footprints.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 77 contacts → | ||||
Partial evidence “For over 100 years, Beaudrey has specialized in the design, installation and service of fully customizable water screening and condenser protection equipment.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 75 contacts → | ||||
Strong evidence “Envirogen Group is a global leader in industrial water treatment and process filtration solutions.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 74 contacts → | ||||
Indirect evidence “Bienvenue sur la page AQUAPROX Industries!” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 73 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
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: once through cooling 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 once through cooling water treatment.
- Partial evidence
- Its own public description names part of once through cooling water treatment, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name once through cooling 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 1,794 once through cooling water treatment worldwide
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Once through cooling water treatment worldwide at a glance
As of Sep 20, 2026Companies by employee count
Email recency is reported on each country list linked below.
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 once through cooling 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.
- Coverage
- Every country. Country and city lists for once through cooling water treatment are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “once through cooling 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 once through cooling 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 once through cooling water treatment, and records with no verified work email.
- 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, 4,798 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.
Once through cooling water treatment by location
17 lists · largest firstEvery Once through cooling water treatment list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Once through cooling water treatment based in the United States418
- Once through cooling water treatment based in India137
- Once through cooling water treatment based in Mexico103
- Once through cooling water treatment based in Türkiye97
- Once through cooling water treatment based in Brazil78
- Once through cooling water treatment based in the United Kingdom76
- Once through cooling water treatment based in Germany63
- Once through cooling water treatment based in France58
- Once through cooling water treatment based in the United Arab Emirates54
- Once through cooling water treatment based in Italy51
- Once through cooling water treatment based in South Africa44
- Once through cooling water treatment based in the Netherlands43
- Once through cooling water treatment based in Canada42
- Once through cooling water treatment based in Spain40
- Once through cooling water treatment based in Belgium26
- Once through cooling water treatment based in Australia25
- Once through cooling water treatment based in Switzerland25
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 once through cooling 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 once through cooling water treatment are there worldwide?
RevenueBase identified 1,794 once through cooling water treatment worldwide 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?
Chemtreat, headquartered in Glen Allen, tops this list with the largest team on record.
Which country has the most once through cooling water treatment?
The United States leads with 418 companies, followed by India (137) and Mexico (103). Every once through cooling water treatment list by country and city is linked on this page.
Which city has the most once through cooling water treatment?
Dubai leads with 12 headquartered companies, followed by Karachi (11) and Houston (10).
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 4,798 verified decision-maker contacts tracked across these 1,794 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.