Company lists · Data refreshed September 2026

Top 25 Process water treatment companies based in Finland

Name: Process water treatment companies based in Finland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 44 companies tracked

RevenueBase identified 44 process water treatment companies headquartered in Finland as of September 2026 and tracks 717 professional contacts across them, including 443 with verified work emails. Helsinki is the largest hub.

This list covers process water treatment companies headquartered in Finland, 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

44Companies

717Contacts tracked

443Verified emails

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The 25 largest process water treatment companies based in Finland

Ranked by team size

Top 25 of 44 process water treatment companies based in Finland, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to process water treatment 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	Evac Group	Partial evidence	Espoo, FinlandHQ checked Sep 20, 2026	501-1,000	319 contacts →
	Partial evidence “Evac Group is a global leader in integrated water, waste and wastewater management solutions, as well as corrosion protection and marine growth prevention systems, for the marine…” Source: RevenueBase Database · checked Sep 20, 2026
2	HYXO	Indirect evidence	Kerava, FinlandHQ checked Sep 20, 2026	51-200	62 contacts →
	Indirect evidence “Hyxo is Finnish family owned company with over 50 years of experience in its own field.” Source: RevenueBase Database · checked Sep 20, 2026
3	Flootech	Strong evidence	Turku, FinlandHQ checked Sep 20, 2026	51-200	43 contacts →
	Strong evidence “Flootech Flootech’s vision is creating value by cleaning water through innovation, creativity and expertise in clean water, process water, wastewater treatment and water reuse and…” Source: RevenueBase Database · checked Sep 20, 2026
4	OY Lining AB	Indirect evidence	Vantaa, FinlandHQ checked Sep 20, 2026	51-200	33 contacts →
	Indirect evidence “Oy Lining Ab tarjoaa teknisesti korkealaatuisia laitteita, ratkaisuja ja komponentteja päätoimialanaan vesitekniikka.” Source: RevenueBase Database · checked Sep 20, 2026
5	Kl-Lämpö OY	Indirect evidence	Pirkkala, FinlandHQ checked Sep 20, 2026	11-50	25 contacts →
	Indirect evidence “KL-Lämpö tarjoaa kokonaisvaltaisia vedenkäsittelypalveluita teollisuuteen, voimalaitoksiin ja kiinteistöihin.” Source: RevenueBase Database · checked Sep 20, 2026
6	Sofi Filtration	Partial evidence	Lappeenranta, FinlandHQ checked Sep 20, 2026	1-10	23 contacts →
	Partial evidence “We are experts in fine filtration employing our patented filtration technology in mining and mineral processing, in power plants, in construction and for the pulp & paper industry.” Source: RevenueBase Database · checked Sep 20, 2026
7	Prominent Finland	Indirect evidence	Helsinki, FinlandHQ checked Sep 20, 2026	11-50	18 contacts →
	Indirect evidence “Kehitämme annostelutekniikan ja vedenkäsittelyn ratkaisuja, jotka säästävät luontoa, ovat taloudellisia ja tukevat kestävää kehitystä.” Source: RevenueBase Database · checked Sep 20, 2026
8	Owatec Group OY	Strong evidence	Oulu, FinlandHQ checked Sep 20, 2026	11-50	17 contacts →
	Strong evidence “We are here to turn wastewater into a resource, helping you to cut you businesses costs, optimize processes, and protect the environment with achievable, sustainable water…” Source: RevenueBase Database · checked Sep 20, 2026
9	Teollisuuden Vesi OY	Strong evidence	Mäntsälä, FinlandHQ checked Sep 20, 2026	11-50	15 contacts →
	Strong evidence “Water treatment is a fundamental concern around the world due to the lack of good quality drinking water, and growing environmental concern.” Source: RevenueBase Database · checked Sep 20, 2026
10	Operon Group OY	Strong evidence	Espoo, FinlandHQ checked Sep 20, 2026	51-200	13 contacts →
	Strong evidence “Operon is a leading solution provider and service company for water and sludge treatment.” Source: RevenueBase Database · checked Sep 20, 2026
11	Epse OY LTD	Strong evidence	Ylöjärvi, FinlandHQ checked Sep 20, 2026	11-50	13 contacts →
	Strong evidence “EPSE Oy is a Finnish company specializing in the treatment of industrial and mining process and wastewater containing soluble metals.” Source: RevenueBase Database · checked Sep 20, 2026
12	West Invest Group	Indirect evidence	Kerava, FinlandHQ checked Sep 20, 2026	201-500	10 contacts →
	Indirect evidence “WEST Invest Group on vahvasti kasvava perhe- ja konserniyhtiö.” Source: RevenueBase Database · checked Sep 20, 2026
13	Finex OY	Indirect evidence	Kotka, FinlandHQ checked Sep 20, 2026	11-50	9 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
14	Watec Consulting OY	Indirect evidence	Vantaa, FinlandHQ checked Sep 20, 2026	1-10	8 contacts →
	Indirect evidence “Watec kehittää ja myy uuden sukupolven vesienkäsittelyjärjestelmiä.” Source: RevenueBase Database · checked Sep 20, 2026
15	Enviroprocess Finland OY	Strong evidence	Kerava, FinlandHQ checked Sep 20, 2026	51-200	6 contacts →
	Strong evidence “EnviroProcess (former Processing) is one of the leading Nordic companies with 50 years of experience in water treatment.” Source: RevenueBase Database · checked Sep 20, 2026
16	Sansox	Strong evidence	Lahti, FinlandHQ checked Sep 20, 2026	1-10	6 contacts →
	Strong evidence “SansOx ‘s innovative solutions has required the rethinking of water treatment.” Source: RevenueBase Database · checked Sep 20, 2026
17	Toihan OY	Partial evidence	Helsinki, FinlandHQ checked Sep 20, 2026	1-10	5 contacts →
	Partial evidence “Toihan is an expert organization specialized in pulp and paper industry wastewaters and their treatment.” Source: RevenueBase Database · checked Sep 20, 2026
18	Flocon Technologies	Strong evidence	Espoo, FinlandHQ checked Sep 20, 2026	1-10	5 contacts →
	Strong evidence “Flocon water purification technology offers solutions for process industry as well as for the treatment of municipal wastewater and agricultural wastewater.” Source: RevenueBase Database · checked Sep 20, 2026
19	Solid Water OY	Strong evidence	Ilmajoki, FinlandHQ checked Sep 20, 2026	11-50	4 contacts →
	Strong evidence “Solid Water represents the high quality Finnish water treatment Cleantech expertise, whose products are made from the best raw materials using gained experience-based know-how…” Source: RevenueBase Database · checked Sep 20, 2026
20	Fenno Water LTD OY	Strong evidence	Seinäjoki, FinlandHQ checked Sep 20, 2026	11-50	4 contacts →
	Strong evidence “Fenno Water Ltd Oy (FW) is focused on water and waste water treatment processes and designing & manufacturing of treatment plants.” Source: RevenueBase Database · checked Sep 20, 2026
21	Filterit OY	Strong evidence	Helsinki, FinlandHQ checked Sep 20, 2026	1-10	4 contacts →
	Strong evidence “Filterit Oy is a company specialized in filtration solution, UV disifection and water treatment.” Source: RevenueBase Database · checked Sep 20, 2026
22	Akva Filter OY	Partial evidence	Joutsa, FinlandHQ checked Sep 20, 2026	1-10	3 contacts →
	Partial evidence “Akva Filter Oy engineers and manufactures water filters for private and public customers.” Source: RevenueBase Database · checked Sep 20, 2026
23	Water4you	Indirect evidence	Turku, FinlandHQ checked Sep 20, 2026	1-10	2 contacts →
	Indirect evidence “Puhdas vesi on ydinosaamistamme.” Source: RevenueBase Database · checked Sep 20, 2026
24	Merdec OY	Strong evidence	Rauma, FinlandHQ checked Sep 20, 2026	1-10	1 contacts →
	Strong evidence “With three decades of experience in water and wastewater treatment equipment design and manufacturing, our team is equipped with the tools and product knowledge to offer the best…” Source: RevenueBase Database · checked Sep 20, 2026
25	Pirkanmaan Vedenkäsittely OY	Indirect evidence	FinlandHQ checked Sep 20, 2026	1-10	1 contacts →
	Indirect evidence “Kiinteistöjen ja teollisuuden kokonaisvaltaiset ratkaisut suljettujen järjestelmien vedenkäsittelyyn.” 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: process water treatment 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 process water treatment companies.
Partial evidence: Its own public description names part of process water treatment companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name process water treatment 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 44 process water treatment companies based in Finland

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Process water treatment companies based in Finland at a glance

As of Sep 20, 2026

61.8%Verified-email coverage

16.3Average contacts per company

1-10Median size (employees)

13.6%Largest-city concentration · Helsinki

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Email recency for this list is measured worldwide rather than for Finland, so it is reported there. Company counts and contact totals on this page are exact for Finland, over 44 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 process water treatment 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 Finland whose own description of what they do matches “process water treatment 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 process water treatment 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 process water treatment companies, and records with no verified work email. Companies headquartered outside Finland 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, 443 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 process water treatment 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 process water treatment companies are there based in Finland?

RevenueBase identified 44 process water treatment companies headquartered in Finland 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?

Evac Group, headquartered in Espoo, tops this list with the largest team on record.

Which city has the most process water treatment companies?

Helsinki leads with 6 headquartered companies, followed by Espoo (4) and Kerava (3).

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 443 verified decision-maker contacts tracked across these 44 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.