Company lists · Data refreshed September 2026
Top 25 Once through cooling water treatment based in Germany
RevenueBase identified 63 once through cooling water treatment headquartered in Germany as of September 2026 and tracks 504 professional contacts across them, including 187 with verified work emails. Berlin is the largest hub.
This list covers once through cooling water treatment headquartered in Germany, 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.
The 25 largest once through cooling water treatment based in Germany
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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. | |||||
| 2 | 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. | |||||
| 3 | 42 contacts → | ||||
Strong evidence “INWATEC was founded in and has since established itself as a leading player in water treatment in Germany and Europe.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 27 contacts → | ||||
Indirect evidence “Success story - tradition becomes innovation MKR Metzger can look back on three successful decades.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 22 contacts → | ||||
Indirect evidence “perma-trade Wassertechnik gilt als Pionier und Innovationstreiber in der um-weltfreundlichen Wasserbehandlung und hat aus seinem besonderen Verant-wortungsbewusstsein für unser…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 19 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 13 contacts → | ||||
Indirect evidence “Die Weidner Wassertechnik GmbH ist seit über 20 Jahren Spezialist in der industriellen Wasseraufbereitung und der kompetente Ansprechpartner in allen Bereichen der komplexen Welt…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 9 contacts → | ||||
Indirect evidence “Spirotech ist der vertrauenswürdige Experte für den Schutz, die Analyse und die Wasseraufbereitung von Heiz- und Kühlsystemen mit mehr als 60 Jahren Erfahrung.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 7 contacts → | ||||
Strong evidence “We make industrial water treatment more efficient, more sustainable and more reliable.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 7 contacts → | ||||
Partial evidence “MolAquaTech helps operators and infrastructure owners turn water into process stability.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 7 contacts → | ||||
Indirect evidence “Hydro-X entwickelt Lösungen für die industrielle Wasseraufbereitung in Heizwasser, Kesselwasser- und Kühlsystemen.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 6 contacts → | ||||
Indirect evidence “Wir bieten Ihnen eine umfassende Palette modernster Wasseraufbereitungstechniken, beraten Sie bei Planung und Einsatz der Verfahren.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 6 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 5 contacts → | ||||
Strong evidence “Blue Activity GmbH is a CleanTech company redefining industrial water treatment, replacing environmentally harmful biocides and petroleum-based chemicals with the power of nature.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 5 contacts → | ||||
Indirect evidence “Wir planen und bauen Anlagen für Wasseraufbereitung und Abwassertechnik in industriellen Anwendungen.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 5 contacts → | ||||
Indirect evidence “For over 40 years, REICON has specialized in developing, manufacturing, and delivering innovative ODACON products based on film-forming amines.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 4 contacts → | ||||
Indirect evidence “Eine klare Sache für Industrie, Gewerbe und Handel sowie für Bad, Küche, Schwimmbad und andere Bereiche im privaten Haushalt: Wasseraufbereitungssysteme plus kompetente Beratung…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 4 contacts → | ||||
Indirect evidence “Deutsche NovoChem GmbH & Co.KG is a chemicals company based out of Oberhausen, North Rhine-Westphalia, Germany.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 4 contacts → | ||||
Indirect evidence “Die Z&H Wassertechnik GmbH ist ein wachsendes Unternehmen aus dem Bereich der industriellen Wasseraufbereitung und Experte für Sonderlösungen.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 4 contacts → | ||||
Indirect evidence “Die MULTI Kühlsysteme GmbH ist als Kühlanlagen-Hersteller seit über 20 Jahren ein führendes Unternehmen auf dem Gebiet der Prozesskühlung – insbesondere der Kühlwasserversorgung…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 2 contacts → | ||||
Indirect evidence “Prozesswasser - Kesselspeisewasser - Entgasung - Dosieranlagen Wir sind seit vielen Jahren spezialisiert auf Prozess- und Kesselspeisewasseraufbereitung, Dosieranlagen und…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 2 contacts → | ||||
Indirect evidence “Wasser verstehen – das ist unser Geschäft.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 2 contacts → | ||||
Indirect evidence “SKW® system arbeitet schon seit über 30 Jahren erfolgreich weltweit in den verschiedensten Anwendungen.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 2 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 1 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 63 once through cooling water treatment based in Germany
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 187 reachable decision-makers.
Free signup · no credit card
Once through cooling water treatment based in Germany at a glance
As of Sep 20, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for Germany, so it is reported there. Company counts and contact totals on this page are exact for Germany, over 63 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 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.
- What qualifies
- Companies headquartered in Germany 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. Companies headquartered outside Germany 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, 187 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 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 based in Germany?
RevenueBase identified 63 once through cooling water treatment headquartered in Germany 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?
BWT Wassertechnik Gmbh, headquartered in Schriesheim, tops this list with the largest team on record.
Which city has the most once through cooling water treatment?
Berlin leads with 3 headquartered companies, followed by Bergheim (2) and Freiberg Am Neckar (2).
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 187 verified decision-maker contacts tracked across these 63 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.
Ready to reach these companies? Verified emails and direct dials for all 63 once through cooling water treatment based in Germany. Start with a free account, no credit card.
Download this list →Related lists
Once through cooling water treatment by geography
- Once through cooling water treatment based in Australia
- Once through cooling water treatment based in Belgium
- Once through cooling water treatment based in Brazil
- Once through cooling water treatment based in Canada
- Once through cooling water treatment based in France
- Once through cooling water treatment based in India
- Once through cooling water treatment based in Italy
- Once through cooling water treatment based in Mexico
- Once through cooling water treatment based in the Netherlands
- Once through cooling water treatment based in South Africa
- Once through cooling water treatment based in Spain
- Once through cooling water treatment based in Switzerland
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Once through cooling water treatment based in Australia
- Once through cooling water treatment based in Belgium
- Once through cooling water treatment based in Brazil
- Once through cooling water treatment based in Canada
- Once through cooling water treatment based in France
- Once through cooling water treatment based in India