Company lists · Data refreshed October 2026

Top 25 Hydrogeological services worldwide

Name: Hydrogeological services worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 26, 2026 15,334 companies tracked

RevenueBase identified 15,334 company matches for hydrogeological services worldwide as of October 2026 and tracks 212,998 professional contacts across them, including 58,019 with verified work emails. The United States is the largest market and Belo Horizonte the largest hub.

This list covers company matches for hydrogeological services 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 October 26, 2026. Country and city lists for hydrogeological services 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 Oct 26, 2026 How this list was built

15,334Companies

212,998Contacts tracked

58,019Verified emails

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The 25 largest hydrogeological services worldwide

Ranked by team size

Top 25 of 15,334 company matches for hydrogeological services worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 26, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Tetra Tech	Exact match	Pasadena, CA, United StatesHQ recorded Oct 26, 2026	10001+	13,725 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 · Oct 26, 2026 · View company records in RevenueBase
2	Terracon	Exact match	Olathe, KS, United StatesHQ recorded Oct 26, 2026	5,001-10,000	6,380 contacts →
	Exact match “Terracon is a 100 percent employee-owned consulting engineering firm providing quality services to clients.” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
3	SRK Consulting	Exact match	Vancouver, CanadaHQ recorded Oct 26, 2026	1,001-5,000	2,360 contacts →
	Exact match “SRK Consulting is an independent, international group providing specialised consultancy services.” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
4	ECS Group Of Companies	Exact match	Chantilly, VA, United StatesHQ recorded Oct 26, 2026	1,001-5,000	2,259 contacts →
	Exact match “ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
5	Hazen And Sawyer	Exact match	New York, NY, United StatesHQ recorded Oct 26, 2026	1,001-5,000	2,251 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 · Oct 26, 2026 · View company records in RevenueBase
6	Newpark	Exact match	Katy, TX, United StatesHQ recorded Oct 26, 2026	1,001-5,000	1,274 contacts →
	Exact match “Newpark Fluids Systems is the world’s leading pure-play oil & gas and geothermal fluid solutions provider.” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
7	WSP Chile Y Argentina	Exact match	Vitacura, ChileHQ recorded Oct 26, 2026	10001+	1,057 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 · Oct 26, 2026 · View company records in RevenueBase
8	GZA Geoenvironmental, INC	Exact match	Norwood, MA, United StatesHQ recorded Oct 26, 2026	501-1,000	903 contacts →
	Exact match “Founded in 1964 as a soils and foundations specialty consultant, GZA GeoEnvironmental, Inc.(GZA) has grown into a full-service company providing its clients with highly…” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
9	Klohn Crippen Berger	Exact match	Vancouver, BC, CanadaHQ recorded Oct 26, 2026	501-1,000	890 contacts →
	Exact match “KCB is a global engineering, geosciences, and environmental consulting firm driven by Passion, Integrity and a commitment to Excellence.” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
10	BGC Engineering INC	Exact match	Vancouver, BC, CanadaHQ recorded Oct 26, 2026	501-1,000	813 contacts →
	Exact match “BGC Engineering is an international consulting firm that provides professional services in applied earth sciences.” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
11	AGR	Exact match	Oslo, NorwayHQ recorded Oct 26, 2026	501-1,000	813 contacts →
	Exact match “AGR – an Aqualis company – is a multidisciplinary consultancy, specialising in drilling & wells, subsurface, marine and subsea solutions, resourcing, technical safety and software…” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
12	DUDEK	Exact match	Encinitas, CA, United StatesHQ recorded Oct 26, 2026	501-1,000	807 contacts →
	Exact match “Dudek is an environmental, planning, and engineering consulting firm.” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
13	Integral S.A. Ingenieros Consultores	Exact match	Medellín \| Bogotá \| Lima \| Miami \| Nueva Delhi, ColombiaHQ recorded Oct 26, 2026	1,001-5,000	796 contacts →
	Exact match “Over six decades offering our consultancy services locally and internationally, based on ethical principles and commitments, always through honest, socially responsible actions…” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
14	Seequent	Exact match	Christchurch, New ZealandHQ recorded Oct 26, 2026	501-1,000	756 contacts →
	Exact match “Seequent, The Bentley Subsurface Company, helps organisations to understand the underground, giving them the confidence to make better decisions faster.” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
15	Kuwait Drilling Co. K.S.C.C	Exact match	East Ahmadi, KuwaitHQ recorded Oct 26, 2026	1,001-5,000	732 contacts →
	Exact match “KUWAIT DRILLING CO.” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
16	Sondotécnica Engenharia	Exact match	Rio De Janeiro, BrazilHQ recorded Oct 26, 2026	201-500	667 contacts →
	Exact match “Sondotécnica was founded in 1954.” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
17	Independence S.A	Exact match	Bogotá, ColombiaHQ recorded Oct 26, 2026	1,001-5,000	579 contacts →
	Exact match “INDEPENDENCE S.” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
18	Nijhuis Saur Industries	Exact match	Doetinchem, NetherlandsHQ recorded Oct 26, 2026	1,001-5,000	578 contacts →
	Exact match “Founded in 1904, Nijhuis Saur Industries provides solid and adaptive solutions for sustainable and resilient water use, energy- and resource recovery.” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
19	Gardline Limited	Exact match	Great Yarmouth, United KingdomHQ recorded Oct 26, 2026	501-1,000	565 contacts →
	Exact match “Gardline is a best-in-class provider of geophysical, geotechnical and environmental marine surveys.” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
20	UTEC	Exact match	Aberdeen, United KingdomHQ recorded Oct 26, 2026	201-500	550 contacts →
	Exact match “UTEC, Acteon’s Geo-services business line, harnesses data to optimise designs, save time and maximise your project’s economic value by providing a holistic understanding of the…” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
21	ARGAS	Exact match	4204 King Fahd Road, Saudi ArabiaHQ recorded Oct 26, 2026	1,001-5,000	548 contacts →
	Exact match “ARGAS, since its inception in 1966, was focused on developing Geological and Geophysical field solutions to further explore the earth’s Natural Resources.” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
22	Geotec	Exact match	Ate, BelgiumHQ recorded Oct 26, 2026	1,001-5,000	545 contacts →
	Exact match “Geotec S.A, empresa de perforación perteneciente a Boyles Bros, fue fundado en 1963 posicionándose como una empresa líder en la industria minera peruana.” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
23	Relix Water	Exact match	Santiago, ChileHQ recorded Oct 26, 2026	201-500	542 contacts →
	Exact match “ReliX Water ofrece soluciones innovadoras de agua para la Minería, Agricultura e Industria.” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
24	AGS Water Solutions	Exact match	Oeiras, PortugalHQ recorded Oct 26, 2026	51-200	537 contacts →
	Exact match “AGS – Administração e Gestão de Sistemas de Salubridade, SA focuses on the preservation of the environment, acting throughout the entire water cycle.” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
25	NIP DO Brasil	Exact match	Vitória, BrazilHQ recorded Oct 26, 2026	501-1,000	529 contacts →
	Exact match “Somos uma empresa de Engenharia Consultiva, oferecendo serviços para os mercados de energia, petróleo e gás, saneamento e recursos hídricos, transporte, telecomunicações e…” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “hydrogeological services”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 15,334 hydrogeological services worldwide

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Hydrogeological services worldwide at a glance

As of Oct 26, 2026

27.2%Verified-email coverage

13.9Average contacts per company

1-10Median size (employees)

0.9%Largest-city concentration · Belo Horizonte

Oct 26, 2026Page data refreshed

Companies by employee count

1-10

8,294

11-50

4,904

51-200

1,528

201-500

341

501-1,000

100

1,001-5,000

5,001-10,000

10001+

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 hydrogeological services are linked below.
What qualifies: Company records worldwide whose business descriptions match “hydrogeological services” 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 58,019 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 October 26, 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.

Hydrogeological services by location

61 lists · largest first

Every Hydrogeological services 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 “hydrogeological services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many hydrogeological services are there worldwide?

RevenueBase identified 15,334 company matches for hydrogeological services worldwide as of October 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?

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

Which country has the most hydrogeological services?

The United States leads with 2,213 companies, followed by Brazil (1,219) and Australia (665). Every hydrogeological services list by country and city is linked on this page.

Which city has the most hydrogeological services?

Belo Horizonte leads with 136 company records, followed by Sao Paulo (124) and Houston (88).

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 58,019 professional contacts with verified work emails tracked across these 15,334 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 October 26, 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.