Company lists · Data refreshed September 2026

Top 25 Hydrogeological consulting firms based in Germany

Name: Hydrogeological consulting firms based in Germany
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 3, 2026 486 companies tracked

RevenueBase identified 486 hydrogeological consulting firms headquartered in Germany as of September 2026 and tracks 3,464 professional contacts across them, including 1,229 with verified work emails and 46 with mobile numbers. Berlin is the largest hub.

This list covers hydrogeological consulting firms headquartered in Germany, 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, how directly it supports the match, and when it was last checked. Data refreshed September 3, 2026.

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 HQ checked on every row Match evidence on every row Refreshed Sep 3, 2026 86% judged on-target in blind review

486Companies

3,464Contacts tracked

1,229Verified emails

46Mobile numbers

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The 25 largest hydrogeological consulting firms based in Germany

Ranked by team size

Top 25 of 486 hydrogeological consulting firms based in Germany, ranked by team size, largest first. Data refreshed Sep 3, 2026. Evidence rates how directly each company's own description names hydrogeological consulting firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	GKW ConsultIndirect evidence	Mannheim, GermanyHQ checked Sep 3, 2026	201-500	288
	“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: company website · checked Sep 3, 2026
2	HPC AGIndirect evidence	Harburg Schwaben, GermanyHQ checked Sep 3, 2026	501-1,000	257
	“HPC has been working for people and their environment since 1948: we are specialist planners and experts in soil and groundwater, mineral and drinking water, building ground and…” Source: company website · checked Sep 3, 2026
3	Björnsen Beratende IngenieureIndirect evidence	Koblenz, GermanyHQ checked Sep 3, 2026	201-500	108
	“Wir sind Experten für Wasser, Umwelt, Ingenieurbau, Informatik, Energie und Architektur.” Source: company website · checked Sep 3, 2026
4	Dr. Spang IngenieurgesellschaftIndirect evidence	Witten, GermanyHQ checked Sep 3, 2026	201-500	103
	“Dr.” Source: company website · checked Sep 3, 2026
5	HölscherIndirect evidence	Haren, GermanyHQ checked Sep 3, 2026	501-1,000	88
	“Water has been our passion for more than 60 years.” Source: company website · checked Sep 3, 2026
6	Koop Bronbemaling B.V. Koop Wasserbau GmbhIndirect evidence	Gildehaus, GermanyHQ checked Sep 3, 2026	51-200	86
	“Wij zorgen voor droge voeten!” Source: company website · checked Sep 3, 2026
7	Bauer Resources GmbhIndirect evidence	Schrobenhausen, GermanyHQ checked Sep 3, 2026	1,001-5,000	60
	“Die BAUER Resources GmbH ist der Geschäftsbereich für Umweltdienstleistungen der BAUER Gruppe mit Sitz in Schrobenhausen.” Source: company website · checked Sep 3, 2026
8	Baugrund SÜD Gesellschaft FÜR Geothermie MBHIndirect evidence	Bad Wurzach, GermanyHQ checked Sep 3, 2026	51-200	51
	“BauGrund Süd Gesellschaft für Geothermie mbH is an utilities company based out of MAYBACHSTRASSE 5, Bad Wurzach, Germany.” Source: company website · checked Sep 3, 2026
9	Lindschulte Baden-BadenIndirect evidence	Hügelsheim, GermanyHQ checked Sep 3, 2026	51-200	49
	“WALD + CORBE hat sich zu einem namhaften Ingenieurbüro mit mehreren Standorten in den Bereichen Wasserwirtschaft, Wasserbau, Infrastruktur und Ökologie + Umwelt entwickelt.” Source: company website · checked Sep 3, 2026
10	M&p GroupIndirect evidence	Bad Wiessee, GermanyHQ checked Sep 3, 2026	501-1,000	44
	“Die M&P Group ist eine deutsche Ingenieurgesellschaft und ist führend im Bereich für Nachhaltigkeit.” Source: company website · checked Sep 3, 2026
11	GBM Gesellschaft FÜR Baugeologie UND -Meßtechnik MBHIndirect evidence	Ettlingen, GermanyHQ checked Sep 3, 2026	51-200	40
	“Sicherheit für Ihre Bauvorhaben – vom ersten Gutachten bis zur messtechnischen Überwachung.” Source: company website · checked Sep 3, 2026
12	IGB IngenieurgesellschaftenIndirect evidence	Hamburg, GermanyHQ checked Sep 3, 2026	51-200	38
	“Wir sind IGB!” Source: company website · checked Sep 3, 2026
13	R & H Umwelt GmbhIndirect evidence	Nürnberg, GermanyHQ checked Sep 3, 2026	51-200	33
	“Gestatten, R&H Umwelt.” Source: company website · checked Sep 3, 2026
14	Consulaqua Hamburg Beratungsgesellschaft MBHIndirect evidence	Hamburg, GermanyHQ checked Sep 3, 2026	51-200	33
	“Wasserkompetenz aus einer Hand: CONSULAQUA bietet Ingenieur- und Dienstleistungen rund um 360° Wasser!” Source: company website · checked Sep 3, 2026
15	Dr. Pecher GmbhIndirect evidence	Hochdahl, GermanyHQ checked Sep 3, 2026	51-200	30
	“Die Dr.” Source: company website · checked Sep 3, 2026
16	Hydrotec Water And Environment Consulting Engineers GmbhPartial evidence	Aachen, GermanyHQ checked Sep 3, 2026	51-200	27
	“Hydrotec is a consulting firm focusing on the analysis of quantitative and qualitative aspects of water resources systems and environmental issues as well as data ascertainment…” Source: company website · checked Sep 3, 2026
17	Nickol & Partner AGIndirect evidence	Gröbenzell, GermanyHQ checked Sep 3, 2026	51-200	27
	“Die Nickol & Partner AG ist ein interdisziplinäres Planungs- und Ingenieurbüro mit Standorten in Gröbenzell und München.” Source: company website · checked Sep 3, 2026
18	Klinger UND Partner GmbhIndirect evidence	Stuttgart, GermanyHQ checked Sep 3, 2026	51-200	22
	“Umwelt verantwortlich gestalten – unter diesem Leitmotiv bearbeiten wir bereits seit drei Jahrzehnten Tiefbau und Umweltschutzprojekte für öffentlich-rechtliche und private Kunden.” Source: company website · checked Sep 3, 2026
19	Stein Ingenieure GmbhPartial evidence	Bochum, GermanyHQ checked Sep 3, 2026	51-200	21
	“STEIN Ingenieure GmbH is an internationally active, independent engineering and consulting company that supports its customers in the successful implementation of technically…” Source: company website · checked Sep 3, 2026
20	Ingenieurgesellschaft Heidt Peters MBHIndirect evidence	Celle, GermanyHQ checked Sep 3, 2026	51-200	19
	“Seit 60 Jahren sind wir als Beratende Ingenieure ein leistungsstarker Partner im Tiefbau.” Source: company website · checked Sep 3, 2026
21	Aqua Consult Ingenieur GmbhIndirect evidence	Hannover, GermanyHQ checked Sep 3, 2026	51-200	19
	“Auf den Punkt perfekt: unsere Lösungen Seit gut 50 Jahren arbeiten wir als Experten für Wasserwirtschaft und Umwelttechnik.” Source: company website · checked Sep 3, 2026
22	Hydro-IngenieureIndirect evidence	Düsseldorf, GermanyHQ checked Sep 3, 2026	51-200	18
	“Hydro-Ingenieure – Experten für Wasserwirtschaft & Siedlungswasserbau Seit über 40 Jahren planen und realisieren wir Projekte in der Wasserwirtschaft, Abwassertechnik und…” Source: company website · checked Sep 3, 2026
23	Aquadrat Ingenieure GmbhIndirect evidence	Griesheim, GermanyHQ checked Sep 3, 2026	51-200	17
	“aquadrat ingenieure ist ein Planungsbüro für anspruchsvolle Projekte der Siedlungswasserwirtschaft.” Source: company website · checked Sep 3, 2026
24	Kühn Geoconsulting GmbhIndirect evidence	Bonn, GermanyHQ checked Sep 3, 2026	51-200	16
	“Die KÜHN Geoconsulting® GmbH ist ein unabhängiges Gutachterbüro, das seit mehr als 50 Jahren in den Bereichen Baugrundberatung und Altlastensanierung tätig ist.” Source: company website · checked Sep 3, 2026
25	GTU IngenieurgesellschaftIndirect evidence	Hannover, GermanyHQ checked Sep 3, 2026	201-500	16
	“Wir haben gute Gründe – und das seit mehr als 33 Jahren Wir von der GTU geben Ihnen gerne gute Gründe mit uns zusammen zu arbeiten.” Source: company website · checked Sep 3, 2026

Showing 25 of 486 hydrogeological consulting firms based in Germany

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Hydrogeological consulting firms based in Germany at a glance

As of Sep 3, 2026

1-10Median size (employees)

BerlinLargest hub · 25 HQs

46Contacts with mobile numbers

Sep 3, 2026Data refreshed

Companies by employee count

1-10

231

11-50

175

51-200

201-500

501-1,000

1,001-5,000

Verified emails by last verification

0–30

31–60

118

61–90

688

90–180

419

180+

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 hydrogeological consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Germany whose own description of what they do matches “hydrogeological consulting firms”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among hydrogeological consulting firms, and records with no verified work email. Companies headquartered outside Germany 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 an evidence 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, 1,229 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 3, 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.

Hydrogeological consulting firms by metro

Hydrogeological consulting firms in Berlin25

Frequently asked

How many hydrogeological consulting firms are there based in Germany?

RevenueBase identified 486 hydrogeological consulting firms headquartered in Germany 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?

GKW Consult, headquartered in Mannheim, tops this list with the largest team on record.

Which city has the most hydrogeological consulting firms?

Berlin leads with 25 headquartered companies, followed by Hamburg (16) and Dresden (13).

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 1,229 verified decision-maker contacts tracked across these 486 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 3, 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.