Company lists · Data refreshed September 2026
Top 25 Water infrastructure engineering firms based in Spain
RevenueBase identified 454 water infrastructure engineering firms headquartered in Spain as of September 2026 and tracks 12,382 professional contacts across them, including 1,122 with verified work emails. Madrid is the largest hub.
This list covers water infrastructure engineering firms 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.
The 25 largest water infrastructure engineering firms based in Spain
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,395 contacts → | ||||
Partial evidence “Aqualia es la cuarta empresa de gestión del agua de Europa y la novena del Mundo por población servida, según el último ranking de Global Water Intelligence (diciembre de 2024).” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 2 | 746 contacts → | ||||
Strong evidence “TPF INGENIERÍA is one of the leading engineering companies in Spain, truly committed to innovation and excellence in all aspects of infrastructure development.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 3 | 475 contacts → | ||||
Indirect evidence “En Lantania hacemos realidad grandes infraestructuras de transporte, agua y energía con el entusiasmo de una empresa joven y la solidez que nos aporta la experiencia.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 4 | 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 19, 2026Thanks. The Data Team will review it. | |||||
| 5 | 328 contacts → | ||||
Partial evidence “WSP is one of the world's leading companies in the development of professional engineering services.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 6 | 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, 2026Thanks. The Data Team will review it. | |||||
| 7 | 300 contacts → | ||||
Partial evidence “SYSTRA Ardanuy, founded in 1992, is an international engineering consulting firm specialising in studies, project design, construction management, safety engineering (ISA), and…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 8 | 268 contacts → | ||||
Indirect evidence “Desde 1970 ESTEYCO ha desarrollado internacionalmente más de 1.300 estudios y proyectos.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 9 | 245 contacts → | ||||
Indirect evidence “G.O.C.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 10 | 240 contacts → | ||||
Partial evidence “Founded in 1988, SAITEC is one of the most prestigious engineering firms in Spain at present.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 11 | 236 contacts → | ||||
Partial evidence “Ingeniería Estudios y Proyectos NIP, S.A.(NIPSA) is a Spanish engineering and consulting company created in 1976 with the purpose of providing high quality and flexible technical…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 12 | 209 contacts → | ||||
Indirect evidence “ESPINA is a constantly growing company that has been expanding its areas of activity and services in Spain since 1989 and in Uruguay and the Ivory Coast since 1995.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 13 | 197 contacts → | ||||
Indirect evidence “OFICINA TÉCNICA DE ESTUDIOS Y CONTROL DE OBRAS, S.A.(OFITECO) es una empresa española de consultoría e ingeniería fundada en 1971.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 14 | 173 contacts → | ||||
Partial evidence “We specialize in the design, construction, and operation of water treatment facilities.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 15 | 148 contacts → | ||||
Strong 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, 2026Thanks. The Data Team will review it. | |||||
| 16 | 133 contacts → | ||||
Indirect evidence “Desde su fundación en A Coruña en el año 1985 ICEACSA se ha posicionado en el mercado español como una consultora pionera y líder en el desarrollo integral de proyectos en los…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 17 | 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, 2026Thanks. The Data Team will review it. | |||||
| 18 | 109 contacts → | ||||
Indirect evidence “HEYMO es una empresa de servicios profesionales de ingeniería y consultoría que cuenta con 60 años de experiencia nacional e internacional.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 19 | 106 contacts → | ||||
Indirect evidence “Desde sus inicios, URCI participó activamente en el desarrollo de las infraestructuras viarias, ferroviarias, portuarias y aeroportuarias construidas en España por el gobierno, y…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 20 | 104 contacts → | ||||
Indirect 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, 2026Thanks. The Data Team will review it. | |||||
| 21 | 90 contacts → | ||||
Strong evidence “DAIR is an international engineering and consulting firm specialized in the design, planning and supervision of civil infrastructure.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 22 | 80 contacts → | ||||
Indirect evidence “GRUSAMAR, INGENIERIA Y CONSULTING es una empresa focalizada en la prestación de servicios de Consultoría e Ingeniería.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 23 | 78 contacts → | ||||
Indirect evidence “Tresca Ingeniería nace en 2001, ofreciendo a sus clientes servicios de ingeniería y consultoría en los sectores industrial, terciario y residencial.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 24 | 70 contacts → | ||||
Indirect evidence “Euroconsult es una ingeniería multinacional con mas de 50 años de experiencia cuya misión es satisfacer las necesidades de nuestros clientes como ingeniería de servicio integral…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 25 | 68 contacts → | ||||
Partial evidence “LRA INFRASTRUCTURES CONSULTING, es una empresa creada para llevar a cabo los trabajos de consultoría de infraestructuras que se han venido desarrollando desde 1987 bajo la marca…” Source: RevenueBase Database · checked Sep 19, 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: water infrastructure engineering firms. 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 infrastructure engineering firms.
- Partial evidence
- Its own public description names part of water infrastructure engineering firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name water infrastructure engineering firms. 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 454 water infrastructure engineering firms based in Spain
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Water infrastructure engineering firms based in Spain at a glance
As of Sep 19, 2026Companies by employee count
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 454 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 infrastructure engineering firms, 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 infrastructure engineering firms”. 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 infrastructure engineering firms), 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 infrastructure engineering firms, 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, 1,122 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.
Water infrastructure engineering firms by metro
- Water infrastructure engineering firms in Madrid77
- Water infrastructure engineering firms in Barcelona30
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 infrastructure engineering firms, 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 infrastructure engineering firms are there based in Spain?
RevenueBase identified 454 water infrastructure engineering firms 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?
Aqualia, headquartered in Madrid, tops this list with the largest team on record.
Which city has the most water infrastructure engineering firms?
Madrid leads with 77 headquartered companies, followed by Barcelona (30) and Murcia (19).
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 1,122 verified decision-maker contacts tracked across these 454 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.
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