Company lists · Data refreshed September 2026

Top 25 Wastewater engineering and design firms based in Spain

Name: Wastewater engineering and design firms based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 298 companies tracked

RevenueBase identified 298 wastewater engineering and design firms headquartered in Spain as of September 2026 and tracks 5,831 professional contacts across them, including 601 with verified work emails. Madrid is the largest hub.

This list covers wastewater engineering and design 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.

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

298Companies

5,831Contacts tracked

601Verified emails

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The 25 largest wastewater engineering and design firms based in Spain

Ranked by team size

Top 25 of 298 wastewater engineering and design firms 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 wastewater engineering and design firms: 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	TPF Ingeniería	Partial evidence	Madrid, SpainHQ checked Sep 19, 2026	501-1,000	746 contacts →
	Partial 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, 2026
2	GS Inima Environment	Indirect evidence	Madrid, SpainHQ checked Sep 19, 2026	1,001-5,000	373 contacts →
	Indirect 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	Esteyco	Indirect evidence	Madrid, SpainHQ checked Sep 19, 2026	201-500	268 contacts →
	Indirect evidence “Desde 1970 ESTEYCO ha desarrollado internacionalmente más de 1.300 estudios y proyectos.” Source: RevenueBase Database · checked Sep 19, 2026
5	Espina Obras Hidraulicas S.A	Indirect evidence	Santiago De Compostela, SpainHQ checked Sep 19, 2026	201-500	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, 2026
6	Invall S.A	Partial evidence	Reus, SpainHQ checked Sep 19, 2026	51-200	175 contacts →
	Partial evidence “INVALL is an engineering and consulting services company.” Source: RevenueBase Database · checked Sep 19, 2026
7	Cadagua, A Ferrovial Company	Partial evidence	Bilbao-bilbo, SpainHQ checked Sep 19, 2026	51-200	173 contacts →
	Partial evidence “We specialize in the design, construction, and operation of water treatment facilities.” Source: RevenueBase Database · checked Sep 19, 2026
8	Almar Water Solutions	Indirect evidence	Madrid, SpainHQ checked Sep 19, 2026	51-200	148 contacts →
	Indirect 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
9	Antea Group España Y Latinoamérica	Indirect evidence	A Coruña, SpainHQ checked Sep 19, 2026	51-200	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, 2026
10	Sitra Agua Industrial & Bioenergía	Indirect evidence	Castellón, SpainHQ checked Sep 19, 2026	51-200	114 contacts →
	Indirect evidence “Sitra ofrece soluciones y servicios integrales e innovadores para la gestión eficiente y sostenible del agua en la industria, de la generación de gases renovables y de la…” Source: RevenueBase Database · checked Sep 19, 2026
11	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
12	Urci Consultores	Indirect evidence	Madrid, SpainHQ checked Sep 19, 2026	201-500	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, 2026
13	Bianna	Indirect evidence	Celrà, SpainHQ checked Sep 19, 2026	51-200	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, 2026
14	Azcatec Tecnología E Ingeniería	Partial evidence	Sevilla, SpainHQ checked Sep 19, 2026	51-200	98 contacts →
	Partial evidence “AZCATEC It is the tool for a group of well-organized professional engineers and experts in the development of industrial plants, energy and environmental engineering have to…” Source: RevenueBase Database · checked Sep 19, 2026
15	Ecotec	Indirect evidence	Sallent, SpainHQ checked Sep 19, 2026	11-50	83 contacts →
	Indirect evidence “ECOTEC - Ecología Técnica, S.A.” Source: RevenueBase Database · checked Sep 19, 2026
16	Ledr Ingenieria Y Servicios SL	Indirect evidence	Abrera, SpainHQ checked Sep 19, 2026	51-200	63 contacts →
	Indirect evidence “En LEDR Ingeniería y Servicios SL no solo diseñamos sobre el plano, nuestra verdadera fuerza reside en la capacidad de ejecutar proyectos desde el concepto inicial hasta la puesta…” Source: RevenueBase Database · checked Sep 19, 2026
17	ACO Iberia	Indirect evidence	Maçanet De La Selva, SpainHQ checked Sep 19, 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 19, 2026
18	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
19	ABM Serveis D Enginyeria I Consulting S.L	Partial evidence	Riudellots De La Selva, SpainHQ checked Sep 19, 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 19, 2026
20	Inncive	Indirect evidence	Madrid, SpainHQ checked Sep 19, 2026	51-200	45 contacts →
	Indirect evidence “Constituida en el año INNOVACIÓN CIVIL ESPAÑOLA, S.L es una empresa de Ingeniería y Consultoría especializada en el campo de la Ingeniería Sanitaria y Medioambiental.” Source: RevenueBase Database · checked Sep 19, 2026
21	Intacta Gestión Ambiental	Indirect evidence	As Pontes De García Rodríguez, SpainHQ checked Sep 19, 2026	11-50	45 contacts →
	Indirect evidence “Intacta surge como una sinergia que une la participación activa y concertada para alcanzar una eficacia total y garantizar cualquier servicio medioambiental, pero con ella nace…” Source: RevenueBase Database · checked Sep 19, 2026
22	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
23	Apliclor Water Solutions	Indirect evidence	Sant Martí Sesgueioles, SpainHQ checked Sep 19, 2026	51-200	39 contacts →
	Indirect 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
24	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
25	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

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: wastewater engineering and design 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 wastewater engineering and design firms.
Partial evidence: Its own public description names part of wastewater engineering and design firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name wastewater engineering and design 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 298 wastewater engineering and design firms based in Spain

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Wastewater engineering and design firms based in Spain at a glance

As of Sep 19, 2026

10.3%Verified-email coverage

19.6Average contacts per company

11-50Median size (employees)

14.1%Largest-city concentration · Madrid

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

132

11-50

119

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 298 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 wastewater engineering and design 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 “wastewater engineering and design 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 wastewater engineering and design 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 wastewater engineering and design 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, 601 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.

Wastewater engineering and design firms by metro

Wastewater engineering and design firms in Madrid42

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 wastewater engineering and design 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 wastewater engineering and design firms are there based in Spain?

RevenueBase identified 298 wastewater engineering and design 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?

TPF Ingeniería, headquartered in Madrid, tops this list with the largest team on record.

Which city has the most wastewater engineering and design firms?

Madrid leads with 42 headquartered companies, followed by Barcelona (14) and Sevilla (11).

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 601 verified decision-maker contacts tracked across these 298 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.