Company lists · Data refreshed September 2026

Top 25 Water resources engineering companies based in Spain

Name: Water resources engineering companies based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 141 companies tracked

RevenueBase identified 141 water resources engineering companies headquartered in Spain as of September 2026 and tracks 2,250 professional contacts across them, including 253 with verified work emails. Madrid is the largest hub.

This list covers water resources engineering companies 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 16, 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 16, 2026 86% judged on-target in blind review

141Companies

2,250Contacts tracked

253Verified emails

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The 25 largest water resources engineering companies based in Spain

Ranked by team size

Top 25 of 141 water resources engineering companies based in Spain, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to water resources engineering 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	GS Inima Environment	Partial evidence	Madrid, SpainHQ checked Sep 16, 2026	1,001-5,000	373 contacts →
	Partial 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 16, 2026
2	Facsa. Ciclo Integral DEL Agua	Indirect evidence	Castellón De La Plana, SpainHQ checked Sep 16, 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 16, 2026
3	Cadagua, A Ferrovial Company	Partial evidence	Bilbao-bilbo, SpainHQ checked Sep 16, 2026	51-200	173 contacts →
	Partial evidence “We specialize in the design, construction, and operation of water treatment facilities.” Source: RevenueBase Database · checked Sep 16, 2026
4	Almar Water Solutions	Partial evidence	Madrid, SpainHQ checked Sep 16, 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 16, 2026
5	Espina & Delfín	Indirect evidence	Santiago De Compostela, SpainHQ checked Sep 16, 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 16, 2026
6	Ferrer	Indirect evidence	Museros, SpainHQ checked Sep 16, 2026	11-50	51 contacts →
	Indirect evidence “Se cumplen los 100 años de experiencia que avalan la trayectoria ininterrumpida de FERRER®, que inició su andadura empresarial en 1916 cuando D.” Source: RevenueBase Database · checked Sep 16, 2026
7	ACO Iberia	Indirect evidence	Maçanet De La Selva, SpainHQ checked Sep 16, 2026	51-200	50 contacts →
	Indirect evidence “ACO Grupo Iberia now offers, together with ACO Remosa-a family-run company with a long-standing presence in the market and now part of the ACO Group-systems and services to…” Source: RevenueBase Database · checked Sep 16, 2026
8	Elmasa Tecnología DEL Agua	Indirect evidence	San Bartolomé De Tirajana, SpainHQ checked Sep 16, 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 16, 2026
9	ABM Serveis D Enginyeria I Consulting S.L	Partial evidence	Riudellots De La Selva, SpainHQ checked Sep 16, 2026	11-50	47 contacts →
	Partial evidence “ABM Consulting is a consulting and engineering services company with over 20 years of experience.” Source: RevenueBase Database · checked Sep 16, 2026
10	Pavagua Ambiental	Indirect evidence	Valencia, SpainHQ checked Sep 16, 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 16, 2026
11	Dinotec	Indirect evidence	Sevilla, SpainHQ checked Sep 16, 2026	11-50	27 contacts →
	Indirect evidence “DINOTEC Sociedad de Aguas y Medio Ambiente S.L.” Source: RevenueBase Database · checked Sep 16, 2026
12	Consulnima	Indirect evidence	Madrid, SpainHQ checked Sep 16, 2026	11-50	26 contacts →
	Indirect evidence “Consultoría e ingeniería ambiental.” Source: RevenueBase Database · checked Sep 16, 2026
13	OPS Infraestructuras Y Servicios Hidraulicos SL	Indirect evidence	Humanes De Madrid, SpainHQ checked Sep 16, 2026	51-200	25 contacts →
	Indirect evidence “OPS INFRAESTRUCTURAS Y SERVICIOS HIDRAULICOS SL is a construction company based out of CALLE DALIA, 4, MADRID, Madrid, Spain.” Source: RevenueBase Database · checked Sep 16, 2026
14	TAGUA	Indirect evidence	Santa Cruz De Tenerife, SpainHQ checked Sep 16, 2026	51-200	25 contacts →
	Indirect evidence “Nuestro objetivo es actuar de la forma más eficaz en la gestión del agua en todos sus usos posibles: consumo urbano, agricultura, industrial, turismo y ocio.” Source: RevenueBase Database · checked Sep 16, 2026
15	Inhisa Hidráulica S.A	Indirect evidence	Madrid, SpainHQ checked Sep 16, 2026	11-50	18 contacts →
	Indirect evidence “Somos una empresa de ingeniería española especialista en ingeniería, proyectos y fabricaciones hidromecánicas desde 1958, habiendo realizado actuaciones en más de mil proyectos…” Source: RevenueBase Database · checked Sep 16, 2026
16	Cingral S.L	Partial evidence	Zaragoza, SpainHQ checked Sep 16, 2026	11-50	16 contacts →
	Partial evidence “CINGRAL is one of Spain’s leading consultancies in Rural Development, Water and Environment sectors.” Source: RevenueBase Database · checked Sep 16, 2026
17	Envirosoil	Indirect evidence	Madrid, SpainHQ checked Sep 16, 2026	11-50	16 contacts →
	Indirect evidence “Rebajamiento de Niveles Freáticos y Descontaminación de Suelos y Aguas Subterráneas.” Source: RevenueBase Database · checked Sep 16, 2026
18	TXT Ingeniería S.L	Indirect evidence	Badajoz, SpainHQ checked Sep 16, 2026	11-50	14 contacts →
	Indirect evidence “TXT Ingeniería, S.L.” Source: RevenueBase Database · checked Sep 16, 2026
19	Inproes S.A. Internacional DE Proyectos Y Estudios DE Ingenieria	Indirect evidence	Madrid, SpainHQ checked Sep 16, 2026	11-50	12 contacts →
	Indirect evidence “INPROES es una empresa consultora de ingeniería constituida en el año 1979, con sede en Madrid C/ Gabriela Mistral, 2.” Source: RevenueBase Database · checked Sep 16, 2026
20	Engisic Solucions I Consulting SL	Indirect evidence	Igualada, SpainHQ checked Sep 16, 2026	1-10	11 contacts →
	Indirect evidence “Som una consultoria i enginyeria especialitzada en projectes del cicle de l’aigua.” Source: RevenueBase Database · checked Sep 16, 2026
21	Delfos Group	Partial evidence	Madrid, SpainHQ checked Sep 16, 2026	11-50	10 contacts →
	Partial evidence “DELFOS is an engineering company established in by a small group of Civil Engineers, Channels and Ports with extensive business experience in the construction sector, both public…” Source: RevenueBase Database · checked Sep 16, 2026
22	Cial Canarias, S.L.U	Strong evidence	Las Palmas De Gran Canaria, SpainHQ checked Sep 16, 2026	1-10	9 contacts →
	Strong evidence “CIAL Ingenieros is a consulting firm specialized in the management of civil and industrial engineering projects, and in providing solutions for water treatment and renewable…” Source: RevenueBase Database · checked Sep 16, 2026
23	MF Tecnima	Indirect evidence	Vic, SpainHQ checked Sep 16, 2026	11-50	7 contacts →
	Indirect evidence “Som una empresa d'Enginyeria - Consultoria especialitzada en el sector del medi ambient, fundada l'any 1997 amb un clar objectiu: oferir a les empreses un servei integral i…” Source: RevenueBase Database · checked Sep 16, 2026
24	Agnua Ingeniería	Indirect evidence	Madrid, SpainHQ checked Sep 16, 2026	1-10	6 contacts →
	Indirect evidence “Somos una empresa de ingeniería y consultoría dedicada al diseño de plantas de tratamiento de agua.” Source: RevenueBase Database · checked Sep 16, 2026
25	Innoservis Ingenieria DEL Agua	Indirect evidence	L'olleria, SpainHQ checked Sep 16, 2026	11-50	5 contacts →
	Indirect evidence “En Innoservis, llevamos 10 años desarrollando, innovando y dando servicio a más de 500 clientes con necesidades muy diversas pero todas con el mismo elemento en común….” Source: RevenueBase Database · checked Sep 16, 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 resources engineering 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 water resources engineering companies.
Partial evidence: Its own public description names part of water resources engineering companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name water resources engineering 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 141 water resources engineering companies based in Spain

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Water resources engineering companies based in Spain at a glance

As of Sep 16, 2026

11.2%Verified-email coverage

16.0Average contacts per company

1-10Median size (employees)

22.7%Largest-city concentration · Madrid

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 141 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 resources engineering 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 Spain whose own description of what they do matches “water resources engineering 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 water resources engineering 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 water resources engineering companies, 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, 253 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 16, 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.

Water resources engineering companies by metro

Water resources engineering companies in Madrid32

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 resources engineering 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 water resources engineering companies are there based in Spain?

RevenueBase identified 141 water resources engineering companies 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?

GS Inima Environment, headquartered in Madrid, tops this list with the largest team on record.

Which city has the most water resources engineering companies?

Madrid leads with 32 headquartered companies, followed by Murcia (8) and Barcelona (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 253 verified decision-maker contacts tracked across these 141 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 16, 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.