Company lists · Data refreshed September 2026

Top 25 Desalination consulting firms worldwide

Name: Desalination consulting firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 4,182 companies tracked

RevenueBase identified 4,182 desalination consulting firms worldwide as of September 2026 and tracks 65,349 professional contacts across them, including 18,514 with verified work emails. The United States is the largest market and Tehran the largest hub.

This list covers desalination consulting firms worldwide, 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 28, 2026. Country and city lists for desalination consulting firms follow the table.

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 28, 2026 86% judged on-target in blind review

4,182Companies

65,349Contacts tracked

18,514Verified emails

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The 25 largest desalination consulting firms worldwide

Ranked by team size

Top 25 of 4,182 desalination consulting firms worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to desalination 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	Tetra Tech	Indirect evidence	Pasadena, CA, United StatesHQ checked Sep 28, 2026	10001+	12,999 contacts →
	Indirect evidence “Tetra Tech is the leader in water, environment and sustainable infrastructure, providing high-end technical and engineering services for projects worldwide.” Source: RevenueBase Database · checked Sep 28, 2026
2	Hazen And Sawyer	Indirect evidence	New York, NY, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,100 contacts →
	Indirect evidence “As Hazen marks 75 years, we celebrate a legacy of absolute commitment to our clients while delivering the best technical work available anywhere.” Source: RevenueBase Database · checked Sep 28, 2026
3	WSP EN Chile	Indirect evidence	Vitacura, ChileHQ checked Sep 28, 2026	10001+	988 contacts →
	Indirect evidence “WSP en una empresa líder en servicios profesionales de consultoría en recursos hídricos, ingeniería, medio ambiente y sustentabilidad.” Source: RevenueBase Database · checked Sep 28, 2026
4	Aquatech	Partial evidence	Canonsburg, PA, United StatesHQ checked Sep 28, 2026	501-1,000	903 contacts →
	Partial evidence “Aquatech enables the world's most recognized companies to solve complex challenges in water reuse, desalination, minimal and zero liquid discharge, and critical minerals…” Source: RevenueBase Database · checked Sep 28, 2026
5	Nijhuis Saur Industries	Indirect evidence	Doetinchem, NetherlandsHQ checked Sep 28, 2026	1,001-5,000	609 contacts →
	Indirect evidence “Founded in 1904, Nijhuis Saur Industries provides solid and adaptive solutions for sustainable and resilient water use, energy- and resource recovery.” Source: RevenueBase Database · checked Sep 28, 2026
6	IDE Technologies	Partial evidence	Kadima, IsraelHQ checked Sep 28, 2026	501-1,000	603 contacts →
	Partial evidence “A world leader in water treatment solutions, IDE specializes in the development, engineering, construction and operation of enhanced desalination and industrial water treatment…” Source: RevenueBase Database · checked Sep 28, 2026
7	AGS Water Solutions	Indirect evidence	Paço De Arcos, PortugalHQ checked Sep 28, 2026	51-200	502 contacts →
	Indirect evidence “AGS – Administração e Gestão de Sistemas de Salubridade, SA focuses on the preservation of the environment, acting throughout the entire water cycle.” Source: RevenueBase Database · checked Sep 28, 2026
8	Anchor QEA	Partial evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	501-1,000	479 contacts →
	Partial evidence “Headquartered in Seattle, Washington, Anchor QEA is a nationally recognized environmental science and engineering consulting firm specializing in aquatic, shoreline, and water…” Source: RevenueBase Database · checked Sep 28, 2026
9	GS Inima Brasil	Indirect evidence	Sao Paulo, BrazilHQ checked Sep 28, 2026	1,001-5,000	439 contacts →
	Indirect evidence “A GS Inima Brasil é uma das maiores e mais respeitadas companhias privadas de saneamento do país, oferecendo soluções inovadoras e integradas.” Source: RevenueBase Database · checked Sep 28, 2026
10	Grupo EP	Indirect evidence	Guarulhos, BrazilHQ checked Sep 28, 2026	501-1,000	434 contacts →
	Indirect evidence “Identificamos e solucionamos problemas relacionados ao tratamento de água e efluentes, reúso, dessalinização e análises ambientais para indústrias, consultorias ambientais e…” Source: RevenueBase Database · checked Sep 28, 2026
11	Neo2	Partial evidence	Levallois-perret, FranceHQ checked Sep 28, 2026	501-1,000	390 contacts →
	Partial evidence “NEO2 is an Engineering Consultancy and Resource Provider active in the Oil & Gas, Water Treatment & Desalination, and Power Generation industries.” Source: RevenueBase Database · checked Sep 28, 2026
12	Hyflux LTD	Indirect evidence	SingaporeHQ checked Sep 28, 2026	1,001-5,000	389 contacts →
	Indirect evidence “Hyflux is a global leader in environmental solutions, focusing on the areas of water and energy.” Source: RevenueBase Database · checked Sep 28, 2026
13	GS Inima Environment	Indirect evidence	Madrid, SpainHQ checked Sep 28, 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 28, 2026
14	Fisia Italimpianti	Indirect evidence	Genova, ItalyHQ checked Sep 28, 2026	51-200	362 contacts →
	Indirect evidence “Fisia Italimpianti S.p.A, part of Webuild Group (the new group born in 2020 from Salini Impregilo), is a worldwide leader in the sustainable design and execution of water…” Source: RevenueBase Database · checked Sep 28, 2026
15	L&t	Indirect evidence	Chennai, IndiaHQ checked Sep 28, 2026	5,001-10,000	350 contacts →
	Indirect evidence “L&T Construction's Water & Effluent Treatment business vertical provides state-of-the-art design, detailed engineering, procurement, project management, project execution…” Source: RevenueBase Database · checked Sep 28, 2026
16	Energoprojekt Entel	Partial evidence	Belgrade, SerbiaHQ checked Sep 28, 2026	501-1,000	310 contacts →
	Partial evidence “Energoprojekt ENTEL is an independent, international consulting company, specialized in engineering, design and project management.” Source: RevenueBase Database · checked Sep 28, 2026
17	Ticsa Grupo EPM	Indirect evidence	Tlacoquemécatl, MexicoHQ checked Sep 28, 2026	501-1,000	305 contacts →
	Indirect evidence “En TICSA ofrecemos conocimiento y experiencia para crear soluciones innovadoras para el diseño, construcción, operación y mantenimiento de plantas de tratamiento de agua que den…” Source: RevenueBase Database · checked Sep 28, 2026
18	GKW Consult	Indirect evidence	Mannheim, GermanyHQ checked Sep 28, 2026	201-500	282 contacts →
	Indirect evidence “GKW Consult GmbH, a company of GFA Group, has developed and implemented projects and advisory services for public and private clients for 70 years in more than 50 countries…” Source: RevenueBase Database · checked Sep 28, 2026
19	West Yost	Partial evidence	Davis, CA, United StatesHQ checked Sep 28, 2026	201-500	279 contacts →
	Partial evidence “West Yost is a water-focused consulting engineering firm ranked by Fortune Magazine as one of the “Best Small and Medium Workplaces in Consulting and Professional Services” 2023 -…” Source: RevenueBase Database · checked Sep 28, 2026
20	Sarost S.A	Indirect evidence	Menzah Iv, TunisiaHQ checked Sep 28, 2026	201-500	252 contacts →
	Indirect evidence “Since 1982, SAROST has provided integrated and specialized services in the fields of water, Energy and Environment.” Source: RevenueBase Database · checked Sep 28, 2026
21	Paterson & Cooke	Partial evidence	Cape Town, South AfricaHQ checked Sep 28, 2026	201-500	243 contacts →
	Partial evidence “Paterson & Cooke is a global mining consulting firm renowned and trusted for its expertise in a wide range of areas that include tailings and mine waste handling, long distance…” Source: RevenueBase Database · checked Sep 28, 2026
22	Energy Recovery, INC	Indirect evidence	San Leandro, CA, United StatesHQ checked Sep 28, 2026	201-500	219 contacts →
	Indirect evidence “Energy Recovery (Nasdaq: ERII) designs and manufactures world-class energy-saving technology for critical infrastructure that communities rely on every day, driving a more…” Source: RevenueBase Database · checked Sep 28, 2026
23	Trility	Indirect evidence	Adelaide, AustraliaHQ checked Sep 28, 2026	201-500	217 contacts →
	Indirect evidence “Company Overview: TRILITY is an established industry leader, dedicated in the delivery of water, wastewater, reuse and bio-solids solutions across Australia and New Zealand’s…” Source: RevenueBase Database · checked Sep 28, 2026
24	Blumetric	Indirect evidence	Ottawa, ON, CanadaHQ checked Sep 28, 2026	201-500	210 contacts →
	Indirect evidence “Since 1976, BluMetric has been delivering innovative and sustainable solutions to complex environmental challenges.” Source: RevenueBase Database · checked Sep 28, 2026
25	Hydrocon	Indirect evidence	Monterrey, MexicoHQ checked Sep 28, 2026	201-500	200 contacts →
	Indirect evidence “Hydrocon busca lograr la Sustentabilidad Económica, Operativa y Ecológica de sus clientes, siendo un Aliado Estratégico en el manejo integral del agua en la industria, a través de…” Source: RevenueBase Database · checked Sep 28, 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: desalination 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 desalination consulting firms.
Partial evidence: Its own public description names part of desalination consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name desalination 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 4,182 desalination consulting firms worldwide

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Desalination consulting firms worldwide at a glance

As of Sep 28, 2026

28.3%Verified-email coverage

15.6Average contacts per company

11-50Median size (employees)

1.5%Largest-city concentration · Tehran

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

1,980

11-50

1,447

51-200

505

201-500

151

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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 desalination 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.
Coverage: Every country. Country and city lists for desalination consulting firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “desalination 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 desalination 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 desalination consulting firms, and records with no verified work email.
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, 18,514 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 28, 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.

Desalination consulting firms by location

23 lists · largest first

Every Desalination consulting firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

Desalination consulting firms based in Sao Paulo, Brazil33

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 desalination 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 desalination consulting firms are there worldwide?

RevenueBase identified 4,182 desalination consulting firms worldwide 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?

Tetra Tech, headquartered in Pasadena, tops this list with the largest team on record.

Which country has the most desalination consulting firms?

The United States leads with 480 companies, followed by India (336) and Brazil (287). Every desalination consulting firms list by country and city is linked on this page.

Which city has the most desalination consulting firms?

Tehran leads with 64 headquartered companies, followed by Sao Paulo (33) and Cairo (31).

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 18,514 verified decision-maker contacts tracked across these 4,182 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 28, 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.