Company lists · Data refreshed September 2026

Top 25 Water treatment plant contractors based in Spain

Name: Water treatment plant contractors based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 247 companies tracked

RevenueBase identified 247 water treatment plant contractors headquartered in Spain as of September 2026 and tracks 3,805 professional contacts across them, including 442 with verified work emails. Barcelona is the largest hub.

This list covers water treatment plant contractors headquartered in Spain, 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 19, 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 19, 2026 86% judged on-target in blind review

247Companies

3,805Contacts tracked

442Verified emails

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The 25 largest water treatment plant contractors based in Spain

Ranked by team size

Top 25 of 247 water treatment plant contractors based in Spain, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to water treatment plant contractors: 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	Eden Springs	Partial evidence	Barcelona, SpainHQ checked Sep 19, 2026	1,001-5,000	488 contacts →
	Partial evidence “Eden, a proud part of the Culligan family, provides instant access to cleaner, safer, and better-tasting water through our unparalleled expertise in sustainability, science, and…” Source: RevenueBase Database · checked Sep 19, 2026
2	GS Inima Environment	Strong evidence	Madrid, SpainHQ checked Sep 19, 2026	1,001-5,000	373 contacts →
	Strong evidence “Positioned as one of the companies with the largest number of plants in terms of concessions, GS Inima is a world benchmark in the water sector acting in all phases of the…” Source: RevenueBase Database · checked Sep 19, 2026
3	Facsa. Ciclo Integral DEL Agua	Indirect evidence	Castellón De La Plana, SpainHQ checked Sep 19, 2026	1,001-5,000	305 contacts →
	Indirect evidence “Facsa, empresa ‘origen’ de Nealis, es una referencia en el territorio nacional en la gestión global de los recursos hídricos.” Source: RevenueBase Database · checked Sep 19, 2026
4	Cadagua, A Ferrovial Company	Strong evidence	Bilbao-bilbo, SpainHQ checked Sep 19, 2026	51-200	173 contacts →
	Strong evidence “We specialize in the design, construction, and operation of water treatment facilities.” Source: RevenueBase Database · checked Sep 19, 2026
5	Culligan España	Indirect evidence	Tomares, SpainHQ checked Sep 19, 2026	501-1,000	153 contacts →
	Indirect evidence “Culligan es conocida por la alta calidad en el tratamiento de piscinas, por su implantación de descalcificadores y equipos de ósmosis inversa en el mercado doméstico, y por la…” Source: RevenueBase Database · checked Sep 19, 2026
6	Almar Water Solutions	Partial evidence	Madrid, SpainHQ checked Sep 19, 2026	51-200	148 contacts →
	Partial evidence “Almar Water Solutions is a leading global water infrastructure development and services business creating innovative, utility-scale, solutions for both municipal and industrial…” Source: RevenueBase Database · checked Sep 19, 2026
7	Espina & Delfín	Indirect evidence	Santiago De Compostela, SpainHQ checked Sep 19, 2026	201-500	112 contacts →
	Indirect evidence “Somos especialistas en la gestión integral del ciclo del agua y en la construcción de obras hidráulicas.” Source: RevenueBase Database · checked Sep 19, 2026
8	Bianna	Strong evidence	Celrà, SpainHQ checked Sep 19, 2026	51-200	104 contacts →
	Strong evidence “For more than 20 years we have developed, planned and installed "turnkey" waste treatment plants all over the world and we are the leading manufacturer of equipment for the sector.” Source: RevenueBase Database · checked Sep 19, 2026
9	Elmasa Tecnología DEL Agua	Indirect evidence	San Bartolomé De Tirajana, SpainHQ checked Sep 19, 2026	11-50	48 contacts →
	Indirect evidence “Elmasa Tecnología del Agua es una empresa especializada en el ciclo integral del agua.” Source: RevenueBase Database · checked Sep 19, 2026
10	Depuración DE Aguas DEL Mediterráneo, S.L	Indirect evidence	Paterna, SpainHQ checked Sep 19, 2026	501-1,000	44 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
11	Kinetico Spain	Indirect evidence	L'ametlla Del Vallès, SpainHQ checked Sep 19, 2026	201-500	43 contacts →
	Indirect evidence “Los productos Kinetico resuelven los problemas de calidad del agua de familias y negocios de todo el mundo, con el fin de garantizar que las ventajas del tratamiento de aguas…” Source: RevenueBase Database · checked Sep 19, 2026
12	Apliclor Water Solutions	Partial evidence	Sant Martí Sesgueioles, SpainHQ checked Sep 19, 2026	51-200	39 contacts →
	Partial evidence “About APLICLOR Water Solutions: Apliclor was originally established back in 1911 as a family business focused on the commercialization of chemical products.” Source: RevenueBase Database · checked Sep 19, 2026
13	Marea, Medio Ambiente, Residuos Y Agua	Indirect evidence	Sevilla, SpainHQ checked Sep 19, 2026	11-50	38 contacts →
	Indirect evidence “Marea es una empresa del grupo RUSVEL de construcción y servicios, con una dilatada experiencia en el ciclo integral del agua y otros campos como la industria, la agricultura, el…” Source: RevenueBase Database · checked Sep 19, 2026
14	Pavagua Ambiental	Indirect evidence	Valencia, SpainHQ checked Sep 19, 2026	51-200	36 contacts →
	Indirect evidence “PAVAGUA AMBIENTAL es una empresa de servicios especializada en la gestión del ciclo integral del agua y el cuidado del medioambiente.” Source: RevenueBase Database · checked Sep 19, 2026
15	Osmofilter Industrial	Indirect evidence	Silla, SpainHQ checked Sep 19, 2026	11-50	36 contacts →
	Indirect evidence “En Osmofilter Industrial somos pioneros en el sector de tratamiento de agua en España y expertos en trabajar con ingenierías que dan solución a los problemas del sector.” Source: RevenueBase Database · checked Sep 19, 2026
16	Fluidra Commercial Pool	Partial evidence	Sant Cugat Del Vallès, SpainHQ checked Sep 19, 2026	1,001-5,000	34 contacts →
	Partial evidence “Fluidra Commercial Pool and Wellness is a Fluidra Business Unit with extensive experience in designing, developing and implementing water facilities all around the world.” Source: RevenueBase Database · checked Sep 19, 2026
17	VDF Team	Indirect evidence	Cardedeu, SpainHQ checked Sep 19, 2026	51-200	33 contacts →
	Indirect evidence “Somos una empresa de productos para el tratamiento de agua única en nuestro sector.” Source: RevenueBase Database · checked Sep 19, 2026
18	Ansareo Grupo	Indirect evidence	Ortuella, SpainHQ checked Sep 19, 2026	1,001-5,000	32 contacts →
	Indirect evidence “Ofrecemos soluciones en cuanto a obra civil, servicios de limpiezas industriales, equipos de bombeo, servicios de jardinería, y un amplio abanico de servicios a disposición de…” Source: RevenueBase Database · checked Sep 19, 2026
19	Odylsa	Indirect evidence	Santa Perpètua De La Mogoda, SpainHQ checked Sep 19, 2026	51-200	31 contacts →
	Indirect evidence “ODYL, S.A.” Source: RevenueBase Database · checked Sep 19, 2026
20	Dinotec	Indirect evidence	Sevilla, SpainHQ checked Sep 19, 2026	11-50	27 contacts →
	Indirect evidence “DINOTEC Sociedad de Aguas y Medio Ambiente S.L.” Source: RevenueBase Database · checked Sep 19, 2026
21	Setapht	Strong evidence	Rivas-vaciamadrid, SpainHQ checked Sep 19, 2026	51-200	25 contacts →
	Strong evidence “Spanish Company with more that 50 years of experience in water treatment with projects in 5 continents.” Source: RevenueBase Database · checked Sep 19, 2026
22	BWT ATH	Indirect evidence	Cervelló, SpainHQ checked Sep 19, 2026	51-200	22 contacts →
	Indirect evidence “Con más de 28 años de experiencia en el mercado, ATH, ofrece una sólida presencia respaldada por el líder europeo en tecnología del agua.” Source: RevenueBase Database · checked Sep 19, 2026
23	Bluegold	Strong evidence	El Campello, SpainHQ checked Sep 19, 2026	11-50	22 contacts →
	Strong evidence “Blue Gold is an engineering company, specialized in the design and supply of water treatment process plants.” Source: RevenueBase Database · checked Sep 19, 2026
24	Daga Equipment	Indirect evidence	Calaf, SpainHQ checked Sep 19, 2026	11-50	17 contacts →
	Indirect evidence “En DAGA investigamos, desarrollamos y fabricamos equipos especializados para la depuración y tratamiento del agua desde el año 1965.” Source: RevenueBase Database · checked Sep 19, 2026
25	Condorchem Enviro Solutions	Partial evidence	Premià De Dalt, SpainHQ checked Sep 19, 2026	11-50	16 contacts →
	Partial evidence “We are an environmental engineering company that provides comprehensive solutions for wastewater treatment and air pollution control for all industrial activities.” Source: RevenueBase Database · checked Sep 19, 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: water treatment plant contractors. 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 water treatment plant contractors.
Partial evidence: Its own public description names part of water treatment plant contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name water treatment plant contractors. 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 247 water treatment plant contractors based in Spain

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Water treatment plant contractors based in Spain at a glance

As of Sep 19, 2026

11.6%Verified-email coverage

15.4Average contacts per company

11-50Median size (employees)

5.7%Largest-city concentration · Barcelona

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

102

11-50

101

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for Spain, so it is reported there. Company counts and contact totals on this page are exact for Spain, over 247 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 water treatment plant contractors, 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 Spain whose own description of what they do matches “water treatment plant contractors”. 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 water treatment plant contractors), 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 water treatment plant contractors, and records with no verified work email. Companies headquartered outside Spain 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, 442 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 19, 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 water treatment plant contractors, 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 water treatment plant contractors are there based in Spain?

RevenueBase identified 247 water treatment plant contractors headquartered in Spain 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?

Eden Springs, headquartered in Barcelona, tops this list with the largest team on record.

Which city has the most water treatment plant contractors?

Barcelona leads with 14 headquartered companies, followed by Madrid (13) and Murcia (7).

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 442 verified decision-maker contacts tracked across these 247 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 19, 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.