Company lists · Data refreshed September 2026

Top 25 Municipal wastewater treatment contractors based in Spain

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

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 154 companies tracked

RevenueBase identified 154 municipal wastewater treatment contractors headquartered in Spain as of September 2026 and tracks 1,979 professional contacts across them, including 250 with verified work emails. Barcelona is the largest hub.

This list covers municipal wastewater treatment 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 17, 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 17, 2026 86% judged on-target in blind review

154Companies

1,979Contacts tracked

250Verified emails

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The 25 largest municipal wastewater treatment contractors based in Spain

Ranked by team size

Top 25 of 154 municipal wastewater treatment contractors based in Spain, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to municipal wastewater treatment 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	Facsa. Ciclo Integral DEL Agua	Indirect evidence	Castellón De La Plana, SpainHQ checked Sep 17, 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 17, 2026
2	Cadagua, A Ferrovial Company	Partial evidence	Bilbao-bilbo, SpainHQ checked Sep 17, 2026	51-200	173 contacts →
	Partial evidence “We specialize in the design, construction, and operation of water treatment facilities.” Source: RevenueBase Database · checked Sep 17, 2026
3	Emaya, S.A	Partial evidence	Palma, SpainHQ checked Sep 17, 2026	1,001-5,000	139 contacts →
	Partial evidence “EMAYA, Empresa Municipal d’Aigües i Clavegueram S.A, és una empresa la titularitat de la qual és de l'Ajuntament de Palma, que posseeix el 100% del seu capital social.” Source: RevenueBase Database · checked Sep 17, 2026
4	Bianna	Partial evidence	Celrà, SpainHQ checked Sep 17, 2026	51-200	104 contacts →
	Partial 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 17, 2026
5	Ecotec	Indirect evidence	Sallent, SpainHQ checked Sep 17, 2026	11-50	83 contacts →
	Indirect evidence “ECOTEC - Ecología Técnica, S.A.” Source: RevenueBase Database · checked Sep 17, 2026
6	Elmasa Tecnología DEL Agua	Indirect evidence	San Bartolomé De Tirajana, SpainHQ checked Sep 17, 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 17, 2026
7	Depuración DE Aguas DEL Mediterráneo, S.L	Indirect evidence	Paterna, SpainHQ checked Sep 17, 2026	501-1,000	44 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
8	Marea, Medio Ambiente, Residuos Y Agua	Indirect evidence	Sevilla, SpainHQ checked Sep 17, 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 17, 2026
9	Pavagua Ambiental	Indirect evidence	Valencia, SpainHQ checked Sep 17, 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 17, 2026
10	Fluidra Commercial Pool	Indirect evidence	Sant Cugat Del Vallès, SpainHQ checked Sep 17, 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 17, 2026
11	Ansareo Grupo	Indirect evidence	Ortuella, SpainHQ checked Sep 17, 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 17, 2026
12	Odylsa	Indirect evidence	Santa Perpètua De La Mogoda, SpainHQ checked Sep 17, 2026	51-200	31 contacts →
	Indirect evidence “ODYL, S.A.” Source: RevenueBase Database · checked Sep 17, 2026
13	Valtalia	Indirect evidence	Ourense, SpainHQ checked Sep 17, 2026	201-500	29 contacts →
	Indirect evidence “Grupo empresarial que, desde su fundación en el año 2005 ha tenido una trayectoria de crecimiento constante y sostenido, experimentando un proceso de diversificación tanto…” Source: RevenueBase Database · checked Sep 17, 2026
14	Dinotec	Indirect evidence	Sevilla, SpainHQ checked Sep 17, 2026	11-50	27 contacts →
	Indirect evidence “DINOTEC Sociedad de Aguas y Medio Ambiente S.L.” Source: RevenueBase Database · checked Sep 17, 2026
15	Bluegold	Partial evidence	El Campello, SpainHQ checked Sep 17, 2026	11-50	22 contacts →
	Partial evidence “Blue Gold is an engineering company, specialized in the design and supply of water treatment process plants.” Source: RevenueBase Database · checked Sep 17, 2026
16	Condorchem Enviro Solutions	Strong evidence	Premià De Dalt, SpainHQ checked Sep 17, 2026	11-50	16 contacts →
	Strong 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 17, 2026
17	Estruagua Water Technology	Indirect evidence	Les Franqueses Del Valles, SpainHQ checked Sep 17, 2026	51-200	16 contacts →
	Indirect evidence “ESTRUAGUA WATER TECHNOLOGY is one of the most important equipment producer for Wwtp, Wtp, pumping station, desalination projects, etc.” Source: RevenueBase Database · checked Sep 17, 2026
18	Depuradores D'osona SL	Partial evidence	Vic, SpainHQ checked Sep 17, 2026	51-200	12 contacts →
	Partial evidence “DEPURADORES D'OSONA SL is a Waste Water Treatment company, based in Osona (Barcelona) taking care of 30 WWTP and its sewage nets.” Source: RevenueBase Database · checked Sep 17, 2026
19	Eminfor S.L	Indirect evidence	Igualada, SpainHQ checked Sep 17, 2026	11-50	11 contacts →
	Indirect evidence “Somos una empresa dedicada al tratamiento de aguas, urbanas e industriales, con una amplia trayectoria de más de 26 años.” Source: RevenueBase Database · checked Sep 17, 2026
20	Depurtech	Strong evidence	Tona, SpainHQ checked Sep 17, 2026	11-50	10 contacts →
	Strong evidence “At Depurtech we are dedicated to the comprehensive treatment of wastewater, industrial, urban and slurry.” Source: RevenueBase Database · checked Sep 17, 2026
21	Aguasigma Water Treatment Solutions	Strong evidence	Cornellà Del Terri, SpainHQ checked Sep 17, 2026	11-50	9 contacts →
	Strong evidence “We are an engineering company with more than 40 years of experience, specialized in the implementation of projects for the treatment of industrial wastewater with our own…” Source: RevenueBase Database · checked Sep 17, 2026
22	Huber Technology España	Partial evidence	Alcobendas, SpainHQ checked Sep 17, 2026	11-50	8 contacts →
	Partial evidence “HUBER es una empresa multinacional especializada en maquinaria, plantas y equipos de acero inoxidable de alta calidad para el tratamiento de aguas residuales y lodos municipales e…” Source: RevenueBase Database · checked Sep 17, 2026
23	MF Tecnima	Indirect evidence	Vic, SpainHQ checked Sep 17, 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 17, 2026
24	Agnua Ingeniería	Indirect evidence	Madrid, SpainHQ checked Sep 17, 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 17, 2026
25	Acondaqua Ingenieria DEL Agua S.L	Indirect evidence	Manises, SpainHQ checked Sep 17, 2026	1-10	6 contacts →
	Indirect evidence “Diagnóstico, Diseño e instalación llave en mano de equipos e instalaciones de tratamiento de aguas potables y residuales.” Source: RevenueBase Database · checked Sep 17, 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: municipal wastewater treatment 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 municipal wastewater treatment contractors.
Partial evidence: Its own public description names part of municipal wastewater treatment contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name municipal wastewater treatment 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 154 municipal wastewater treatment contractors based in Spain

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Municipal wastewater treatment contractors based in Spain at a glance

As of Sep 17, 2026

12.6%Verified-email coverage

12.9Average contacts per company

11-50Median size (employees)

6.5%Largest-city concentration · Barcelona

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

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 154 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 municipal wastewater treatment 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 “municipal wastewater treatment 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 municipal wastewater treatment 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 municipal wastewater treatment 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, 250 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 17, 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 municipal wastewater treatment 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 municipal wastewater treatment contractors are there based in Spain?

RevenueBase identified 154 municipal wastewater treatment 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?

Facsa. Ciclo Integral DEL Agua, headquartered in Castellon De La Plana, tops this list with the largest team on record.

Which city has the most municipal wastewater treatment contractors?

Barcelona leads with 10 headquartered companies, followed by Madrid (8) and Sant Cugat Del Valles (4).

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 250 verified decision-maker contacts tracked across these 154 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 17, 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.