Company lists · Data refreshed September 2026

Top 25 Water resources engineering companies worldwide

Name: Water resources engineering companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 3,950 companies tracked

RevenueBase identified 3,950 water resources engineering companies worldwide as of September 2026 and tracks 110,877 professional contacts across them, including 42,441 with verified work emails and 0 with mobile numbers. The United States is the largest market and Belo Horizonte the largest hub.

This list covers water resources engineering companies 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 16, 2026. Country and city lists for water resources engineering companies 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 16, 2026 86% judged on-target in blind review

3,950Companies

110,877Contacts tracked

42,441Verified emails

0Mobile numbers

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The 25 largest water resources engineering companies worldwide

Ranked by team size

Top 25 of 3,950 water resources engineering companies worldwide, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to water resources engineering companies: 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	Strong evidence	Pasadena, CA, United StatesHQ checked Sep 16, 2026	10001+	12,999 contacts →
	Strong 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 16, 2026
2	CDM Smith	Partial evidence	Boston, MA, United StatesHQ checked Sep 16, 2026	5,001-10,000	7,527 contacts →
	Partial evidence “CDM Smith is shaping what’s next, now, with world class solutions in water, environment, transportation and energy to public and private clients worldwide.” Source: RevenueBase Database · checked Sep 16, 2026
3	STV	Indirect evidence	New York, NY, United StatesHQ checked Sep 16, 2026	1,001-5,000	3,556 contacts →
	Indirect evidence “STV offers professional services for the infrastructure that powers our lives.” Source: RevenueBase Database · checked Sep 16, 2026
4	Brown And Caldwell	Indirect evidence	Walnut Creek, CA, United StatesHQ checked Sep 16, 2026	1,001-5,000	2,473 contacts →
	Indirect evidence “Headquartered in Walnut Creek, Calif, Brown and Caldwell is an employee-owned firm with 2,100+ professionals serving clients locally and globally from 52 locations.” Source: RevenueBase Database · checked Sep 16, 2026
5	KCI	Partial evidence	Sparks, NC, United StatesHQ checked Sep 16, 2026	1,001-5,000	2,207 contacts →
	Partial evidence “KCI is a 100-percent employee-owned engineering, consulting and construction firm serving clients throughout the United States and beyond.” Source: RevenueBase Database · checked Sep 16, 2026
6	Hazen And Sawyer	Indirect evidence	New York, NY, United StatesHQ checked Sep 16, 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 16, 2026
7	Carollo Engineers	Partial evidence	Walnut Creek, CA, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,718 contacts →
	Partial evidence “For more than 90 years, Carollo Engineers has been dedicated exclusively to water and wastewater solutions.” Source: RevenueBase Database · checked Sep 16, 2026
8	Freese And Nichols	Partial evidence	Fort Worth, TX, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,496 contacts →
	Partial evidence “Freese and Nichols is a professional planning, consulting and engineering firm serving clients across the United States.” Source: RevenueBase Database · checked Sep 16, 2026
9	Volkert, INC	Indirect evidence	Mobile, AL, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,199 contacts →
	Indirect evidence “Volkert’s history began in 1925 when it was founded in New Orleans as Doullut & Erwin to provide waterfront and heavy construction services, as well as airport design services…” Source: RevenueBase Database · checked Sep 16, 2026
10	Woodard & Curran	Strong evidence	Portland, ME, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,060 contacts →
	Strong evidence “Woodard & Curran is more than just a consulting firm – we are an employee-owned integrated science, engineering, design-build, and operations company specializing in water and…” Source: RevenueBase Database · checked Sep 16, 2026
11	Garney Construction	Partial evidence	North Kansas City, MO, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,009 contacts →
	Partial evidence “Garney Construction is a national leader in water and wastewater construction.” Source: RevenueBase Database · checked Sep 16, 2026
12	WSP EN Chile	Indirect evidence	Vitacura, ChileHQ checked Sep 16, 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 16, 2026
13	DUDEK	Partial evidence	Encinitas, CA, United StatesHQ checked Sep 16, 2026	501-1,000	795 contacts →
	Partial evidence “Dudek is an environmental, planning, and engineering consulting firm.” Source: RevenueBase Database · checked Sep 16, 2026
14	Shimmick Corporation	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 16, 2026	1,001-5,000	760 contacts →
	Indirect evidence “At Shimmick (NASDAQ: SHIM), we’re shaping the future of sustainable infrastructure through innovative solutions that advance communities and protect our environment.” Source: RevenueBase Database · checked Sep 16, 2026
15	Antea Group - France	Indirect evidence	Olivet, FranceHQ checked Sep 16, 2026	1,001-5,000	737 contacts →
	Indirect evidence “Antea Group est une société internationale d’ingénierie et de conseil en environnement.” Source: RevenueBase Database · checked Sep 16, 2026
16	Integral S.A. Ingenieros Consultores	Indirect evidence	Medellín \| Bogotá \| Lima \| Miami \| Nueva Delhi, ColombiaHQ checked Sep 16, 2026	1,001-5,000	709 contacts →
	Indirect evidence “Over six decades offering our consultancy services locally and internationally, based on ethical principles and commitments, always through honest, socially responsible actions…” Source: RevenueBase Database · checked Sep 16, 2026
17	Nijhuis Saur Industries	Strong evidence	Doetinchem, NetherlandsHQ checked Sep 16, 2026	1,001-5,000	609 contacts →
	Strong 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 16, 2026
18	Neel-Schaffer, INC	Partial evidence	Jackson, MS, United StatesHQ checked Sep 16, 2026	501-1,000	591 contacts →
	Partial evidence “Neel-Schaffer is a multi-disciplined engineering, planning and construction management firm that was founded in 1983 and today is one of the largest private, employee-owned…” Source: RevenueBase Database · checked Sep 16, 2026
19	Sondotécnica Engenharia	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 16, 2026	201-500	588 contacts →
	Indirect evidence “Sondotécnica was founded in 1954.” Source: RevenueBase Database · checked Sep 16, 2026
20	Kennedy Jenks	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 16, 2026	201-500	578 contacts →
	Strong evidence “For over 100 years, Kennedy Jenks has provided engineering and scientific solutions for innovative water and environmental projects.” Source: RevenueBase Database · checked Sep 16, 2026
21	Harris & Associates	Partial evidence	Concord, CA, United StatesHQ checked Sep 16, 2026	201-500	541 contacts →
	Partial evidence “Harris is a 100% employee-owned company focused on helping communities solve today's complex challenges in planning, financing, environmental compliance, civil engineering, and…” Source: RevenueBase Database · checked Sep 16, 2026
22	T&m Associates	Partial evidence	Middletown, NJ, United StatesHQ checked Sep 16, 2026	201-500	516 contacts →
	Partial evidence “T&M Associates is a leading engineering and technical services firm focused on innovative solutions that advance our clients’ goals and sustain communities.” Source: RevenueBase Database · checked Sep 16, 2026
23	AGS Water Solutions	Partial evidence	Paço De Arcos, PortugalHQ checked Sep 16, 2026	51-200	502 contacts →
	Partial 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 16, 2026
24	Anchor QEA	Strong evidence	Seattle, WA, United StatesHQ checked Sep 16, 2026	501-1,000	479 contacts →
	Strong 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 16, 2026
25	Grupo EP	Indirect evidence	Guarulhos, BrazilHQ checked Sep 16, 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 16, 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: water resources engineering companies. 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 resources engineering companies.
Partial evidence: Its own public description names part of water resources engineering companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name water resources engineering companies. 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 3,950 water resources engineering companies worldwide

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Water resources engineering companies worldwide at a glance

As of Sep 16, 2026

38.3%Verified-email coverage

28.1Average contacts per company

11-50Median size (employees)

0.9%Largest-city concentration · Belo Horizonte

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

1,929

11-50

1,322

51-200

468

201-500

127

501-1,000

1,001-5,000

5,001-10,000

10001+

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 resources engineering companies, 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: 25 countries, largest first: the United States, India, Brazil, Germany, Australia, France, Canada, the United Kingdom, Chile, Italy and 15 more. Country and city lists for water resources engineering companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “water resources engineering companies”. 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 resources engineering companies), 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 resources engineering companies, 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, 42,441 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 16, 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 resources engineering companies by location

25 lists · largest first

Every Water resources engineering companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

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 resources engineering companies, 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 resources engineering companies are there worldwide?

RevenueBase identified 3,950 water resources engineering companies 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 water resources engineering companies?

The United States leads with 1,144 companies, followed by India (322) and Brazil (287). Every water resources engineering companies list by country and city is linked on this page.

Which city has the most water resources engineering companies?

Belo Horizonte leads with 37 headquartered companies, followed by Sao Paulo (35) and Madrid (32).

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 42,441 verified decision-maker contacts tracked across these 3,950 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 16, 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.