Company lists · Data refreshed November 2026

Top 25 Water resource consultants worldwide

RevenueBase identified 4,605 company matches for water resource consultants worldwide as of November 2026 and tracks 228,416 professional contacts across them, including 91,760 with verified work emails. The United States is the largest market and Tehran the largest hub.

This list covers company matches for water resource consultants worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026. Country and city lists for water resource consultants follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
4,605Companies
228,416Contacts tracked
91,760Verified emails
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The 25 largest water resource consultants worldwide

Ranked by team size
Top 25 of 4,605 company matches for water resource consultants worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchDallas, TX, United StatesHQ recorded Nov 6, 202610001+68,572 contacts →

Exact match

“AECOM is the global infrastructure leader, committed to delivering a better world.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchParis, FranceHQ recorded Nov 6, 202610001+23,115 contacts →

Exact match

“We provide essential services in the water and waste sectors to preserve resources and improve quality of life wherever we operate.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchPasadena, CA, United StatesHQ recorded Nov 6, 202610001+14,232 contacts →

Exact match

“Tetra Tech is the leader in water, environment and sustainable infrastructure, providing high-end technical and engineering services for projects worldwide.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchBoca Raton, FL, United StatesHQ recorded Nov 6, 20261,001-5,0002,553 contacts →

Exact match

“Geosyntec is a consulting and engineering firm that works with private and public sector clients to address new ventures and complex problems involving our environment, natural…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchWalnut Creek, CA, United StatesHQ recorded Nov 6, 20261,001-5,0002,553 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchNew York, CO, United StatesHQ recorded Nov 6, 20261,001-5,0002,306 contacts →

Exact match

“As Hazen marks 75 years, we celebrate a legacy of absolute commitment to our clients while delivering the best technical work available anywhere.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchLincoln, AR, United StatesHQ recorded Nov 6, 20261,001-5,0002,289 contacts →

Exact match

“Olsson is an engineering firm made up of people who craft expert solutions and designs that improve communities.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchMoon Township, MO, United StatesHQ recorded Nov 6, 20261,001-5,0002,276 contacts →

Exact match

“Civil & Environmental Consultants, Inc.(CEC) provides comprehensive market-oriented consulting services that advance the strategic business objectives of its clients.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchGriffin, GA, United StatesHQ recorded Nov 6, 20261,001-5,0002,206 contacts →

Exact match

“Employee-Owned.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchWalnut Creek, NV, United StatesHQ recorded Nov 6, 20261,001-5,0001,837 contacts →

Exact match

“For more than 90 years, Carollo Engineers has been dedicated exclusively to water and wastewater solutions.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchPhoenix, MA, United StatesHQ recorded Nov 6, 20261,001-5,0001,695 contacts →

Exact match

“Founded on a commitment to sound science and creative solutions, SWCA is a leader in environmental and management consulting services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchWoburn, MA, United StatesHQ recorded Nov 6, 20261,001-5,0001,675 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchFort Worth, TX, United StatesHQ recorded Nov 6, 20261,001-5,0001,588 contacts →

Exact match

“Freese and Nichols is a professional planning, consulting and engineering firm serving clients across the United States.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchHørsholm, DenmarkHQ recorded Nov 6, 20261,001-5,0001,544 contacts →

Exact match

“There is no substitute for water.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchBelvedere, United StatesHQ recorded Nov 6, 20261,001-5,0001,378 contacts →

Exact match

“Knight Piésold is an employee-owned, global consulting firm delivering specialist services to the mining, power, water resources, and infrastructure industries.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchUnited StatesHQ recorded Nov 6, 20261,001-5,0001,356 contacts →

Exact match

“Consor is a leading engineering and consulting firm advancing intelligent, future-ready infrastructure across transportation and water systems.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchRockville, MD, United StatesHQ recorded Nov 6, 20261,001-5,0001,321 contacts →

Exact match

“Who is Apex?”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchTampa, FL, United StatesHQ recorded Nov 6, 20261,001-5,0001,275 contacts →

Exact match

“At Verdantas, we blend engineering and environmental science together with advanced technology and world-renowned labs to create solutions with the big picture in mind.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchMinneapolis, NV, United StatesHQ recorded Nov 6, 20261,001-5,0001,146 contacts →

Exact match

“Barr provides engineering and environmental consulting services to clients across the Midwest, throughout the Americas, and around the world.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchPortland, ME, United StatesHQ recorded Nov 6, 20261,001-5,0001,098 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchPortland, CA, United StatesHQ recorded Nov 6, 2026501-1,0001,088 contacts →

Exact match

“Since its founding in 1976 in Portland, Oregon, DEA has become a recognized leader for progressive and sustainable design and management solutions for complex transportation, land…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchVitacura, ChileHQ recorded Nov 6, 202610001+1,079 contacts →

Exact match

“WSP en una empresa líder en servicios profesionales de consultoría en recursos hídricos, ingeniería, medio ambiente y sustentabilidad.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchHomestead, PA, United StatesHQ recorded Nov 6, 2026501-1,0001,027 contacts →

Exact match

“Transforming ideas into reality® since 1958, GAI Consultants is an engineering, planning, and environmental consulting firm that provides customized solutions and local expertise…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchSeattle, WA, United StatesHQ recorded Nov 6, 2026501-1,000923 contacts →

Exact match

“At Parametrix, we help our clients imagine what's possible.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchRedhill, United KingdomHQ recorded Nov 6, 2026501-1,000916 contacts →

Exact match

“Together with our strategic partners, we can address everything from supporting vulnerable customers, water quality, asset performance and leak detection, to integrated planning…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 4,605 water resource consultants worldwide

See the full list, filter by size, metro and specialty, and access 91,760 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Water resource consultants worldwide at a glance

As of Nov 6, 2026
40.2%Verified-email coverage
49.6Average contacts per company
1-10Median size (employees)
0.8%Largest-city concentration · Tehran
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
2,525
11-50
1,382
51-200
439
201-500
113
501-1,000
42
1,001-5,000
46
5,001-10,000
5
10001+
7

Email recency is reported on each country list linked below.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
Coverage
Every country. Country and city lists for water resource consultants are linked below.
What qualifies
Company records worldwide whose business descriptions match “water resource consultants” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 91,760 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Water resource consultants by location

22 lists · largest first

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

Countries

Cities

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “water resource consultants”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many water resource consultants are there worldwide?

RevenueBase identified 4,605 company matches for water resource consultants worldwide as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

AECOM tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most water resource consultants?

The United States leads with 1,257 companies, followed by Germany (241) and France (228). Every water resource consultants list by country and city is linked on this page.

Which city has the most water resource consultants?

Tehran leads with 37 company records, followed by Belo Horizonte (28) and Sao Paulo (27).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 91,760 professional contacts with verified work emails tracked across these 4,605 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 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 SmartSearch, 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.