Company lists · Data refreshed September 2026

Top 25 Wastewater consulting firms based in Spain

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

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 366 companies tracked

RevenueBase identified 366 wastewater consulting firms headquartered in Spain as of September 2026 and tracks 6,081 professional contacts across them, including 599 with verified work emails. Madrid is the largest hub.

This list covers wastewater consulting 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 29, 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 29, 2026 86% judged on-target in blind review

366Companies

6,081Contacts tracked

599Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest wastewater consulting firms based in Spain

Ranked by team size

Top 25 of 366 wastewater consulting firms based in Spain, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to wastewater consulting 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	Inerco	Indirect evidence	Seville, SpainHQ checked Sep 29, 2026	1,001-5,000	688 contacts →
	Indirect evidence “INERCO, with 30 years of experience, offers comprehensive services and develops advanced technologies that contribute to sustainable industrial development, acting as a leader in…” Source: RevenueBase Database · checked Sep 29, 2026
2	GS Inima Environment	Indirect evidence	Madrid, SpainHQ checked Sep 29, 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 29, 2026
3	Facsa. Ciclo Integral DEL Agua	Indirect evidence	Castellón De La Plana, SpainHQ checked Sep 29, 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 29, 2026
4	G.O.C., S A	Indirect evidence	Vigo, SpainHQ checked Sep 29, 2026	201-500	245 contacts →
	Indirect evidence “G.O.C.” Source: RevenueBase Database · checked Sep 29, 2026
5	Invall S.A	Partial evidence	Reus, SpainHQ checked Sep 29, 2026	51-200	175 contacts →
	Partial evidence “INVALL is an engineering and consulting services company.” Source: RevenueBase Database · checked Sep 29, 2026
6	Cadagua, A Ferrovial Company	Indirect evidence	Bilbao-bilbo, SpainHQ checked Sep 29, 2026	51-200	173 contacts →
	Indirect evidence “We specialize in the design, construction, and operation of water treatment facilities.” Source: RevenueBase Database · checked Sep 29, 2026
7	Almar Water Solutions	Indirect evidence	Madrid, SpainHQ checked Sep 29, 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 29, 2026
8	Antea Group España Y Latinoamérica	Indirect evidence	A Coruña, SpainHQ checked Sep 29, 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 29, 2026
9	Espina & Delfín	Indirect evidence	Santiago De Compostela, SpainHQ checked Sep 29, 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 29, 2026
10	Bianna	Indirect evidence	Celrà, SpainHQ checked Sep 29, 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 29, 2026
11	Emgrisa	Indirect evidence	Madrid, SpainHQ checked Sep 29, 2026	51-200	84 contacts →
	Indirect evidence “Emgrisa es una empresa pionera en servicios y soluciones medioambientales y en economía circular.” Source: RevenueBase Database · checked Sep 29, 2026
12	LRA Infrastructures Consulting	Partial evidence	Madrid, SpainHQ checked Sep 29, 2026	11-50	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 29, 2026
13	Axiom Ingeniería	Indirect evidence	Madrid, SpainHQ checked Sep 29, 2026	51-200	51 contacts →
	Indirect evidence “AXIOM ha sido constituida como consecuencia de la unión de un grupo de técnicos cualificados, provenientes de diferentes empresas de servicios, con especializaciones en…” Source: RevenueBase Database · checked Sep 29, 2026
14	ACO Iberia	Indirect evidence	Maçanet De La Selva, SpainHQ checked Sep 29, 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 29, 2026
15	Elmasa Tecnología DEL Agua	Indirect evidence	San Bartolomé De Tirajana, SpainHQ checked Sep 29, 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 29, 2026
16	ABM Serveis D Enginyeria I Consulting S.L	Partial evidence	Riudellots De La Selva, SpainHQ checked Sep 29, 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 29, 2026
17	Inncive	Indirect evidence	Madrid, SpainHQ checked Sep 29, 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 29, 2026
18	Intacta Gestión Ambiental	Indirect evidence	As Pontes De García Rodríguez, SpainHQ checked Sep 29, 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 29, 2026
19	Depuración DE Aguas DEL Mediterráneo, S.L	Indirect evidence	Paterna, SpainHQ checked Sep 29, 2026	501-1,000	44 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026
20	Transparenta Cicle Integral DE L'aigua	Indirect evidence	Sant Cugat Del Vallès, SpainHQ checked Sep 29, 2026	51-200	42 contacts →
	Indirect evidence “Transparenta garanteix una gestió enfocada a aconseguir la màxima satisfacció del client a través de la millora contínua, eficiència i sostenibilitat de les prestacions.” Source: RevenueBase Database · checked Sep 29, 2026
21	Pavagua Ambiental	Indirect evidence	Valencia, SpainHQ checked Sep 29, 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 29, 2026
22	Esolve. Environmental Consulting And Engineering	Partial evidence	Barcelona, SpainHQ checked Sep 29, 2026	11-50	35 contacts →
	Partial evidence “ESOLVE is an environmental consulting and engineering company that provides a wide range of professional services to private sector companies and public organizations for the…” Source: RevenueBase Database · checked Sep 29, 2026
23	Fluidra Commercial Pool	Indirect evidence	Sant Cugat Del Vallès, SpainHQ checked Sep 29, 2026	1,001-5,000	34 contacts →
	Indirect 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 29, 2026
24	VDF Team	Indirect evidence	Cardedeu, SpainHQ checked Sep 29, 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 29, 2026
25	Ansareo Grupo	Indirect evidence	Ortuella, SpainHQ checked Sep 29, 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 29, 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 consulting 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 consulting firms.
Partial evidence: Its own public description names part of wastewater consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name wastewater consulting 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 366 wastewater consulting firms based in Spain

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 599 reachable decision-makers.

Free signup · no credit card

View the full list →

Wastewater consulting firms based in Spain at a glance

As of Sep 29, 2026

9.9%Verified-email coverage

16.6Average contacts per company

11-50Median size (employees)

15.6%Largest-city concentration · Madrid

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

180

11-50

131

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 366 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 consulting 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 consulting 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 consulting 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 consulting 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, 599 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 29, 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 consulting firms by metro

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 consulting 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 consulting firms are there based in Spain?

RevenueBase identified 366 wastewater consulting 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?

Inerco, headquartered in Seville, tops this list with the largest team on record.

Which city has the most wastewater consulting firms?

Madrid leads with 57 headquartered companies, followed by Barcelona (27) and Seville (17).

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 599 verified decision-maker contacts tracked across these 366 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 29, 2026.

Ready to reach these companies? Verified emails and direct dials for all 366 wastewater consulting firms based in Spain. Start with a free account, no credit card.

Download this list →

Related lists

Wastewater consulting firms by geography

Browse the directory

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.