Company lists · Data refreshed September 2026

Top 25 Hydrological survey companies based in Germany

Name: Hydrological survey companies based in Germany
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 106 companies tracked

RevenueBase identified 106 hydrological survey companies headquartered in Germany as of September 2026 and tracks 772 professional contacts across them, including 189 with verified work emails. Berlin is the largest hub.

This list covers hydrological survey companies 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026.

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 20, 2026 86% judged on-target in blind review

106Companies

772Contacts tracked

189Verified emails

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The 25 largest hydrological survey companies based in Germany

Ranked by team size

Top 25 of 106 hydrological survey companies based in Germany, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to hydrological survey 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	CES Consulting Engineers Salzgitter Gmbh	Indirect evidence	Braunschweig, GermanyHQ checked Sep 20, 2026	51-200	165 contacts →
	Indirect evidence “CES Consulting Engineers Salzgitter GmbH is an independent consulting engineering company with worldwide experience.” Source: RevenueBase Database · checked Sep 20, 2026
2	Consulaqua Hamburg Beratungsgesellschaft MBH	Indirect evidence	Hamburg, GermanyHQ checked Sep 20, 2026	51-200	34 contacts →
	Indirect evidence “Wasserkompetenz aus einer Hand: CONSULAQUA bietet Ingenieur- und Dienstleistungen rund um 360° Wasser!” Source: RevenueBase Database · checked Sep 20, 2026
3	Hydrotec Water And Environment Consulting Engineers Gmbh	Indirect evidence	Aachen, GermanyHQ checked Sep 20, 2026	51-200	27 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 20, 2026
4	AHU Gmbh Wasser Boden Geomatik	Indirect evidence	Aachen, GermanyHQ checked Sep 20, 2026	11-50	20 contacts →
	Indirect evidence “Die ahu GmbH in Aachen ist ein international tätiges Beratungs- und Planungsunternehmen für Wasser und Boden.” Source: RevenueBase Database · checked Sep 20, 2026
5	Aqua Consult Ingenieur Gmbh	Indirect evidence	Hannover, GermanyHQ checked Sep 20, 2026	51-200	20 contacts →
	Indirect evidence “Auf den Punkt perfekt: unsere Lösungen Seit gut 50 Jahren arbeiten wir als Experten für Wasserwirtschaft und Umwelttechnik.” Source: RevenueBase Database · checked Sep 20, 2026
6	Arbeitsgruppe FÜR Regionale Struktur- UND Umweltforschung Gmbh Arsu	Indirect evidence	Oldenburg, GermanyHQ checked Sep 20, 2026	11-50	18 contacts →
	Indirect evidence “Die ARSU GmbH, mit Sitz in Oldenburg, bearbeitet seit mehr als 40 Jahren Planungs, Forschungs- und Umsetzungsprojekte mit einer großen inhaltlichen Bandbreite in den Bereichen…” Source: RevenueBase Database · checked Sep 20, 2026
7	Hydro-Ingenieure	Indirect evidence	Düsseldorf, GermanyHQ checked Sep 20, 2026	51-200	18 contacts →
	Indirect evidence “Hydro-Ingenieure – Experten für Wasserwirtschaft & Siedlungswasserbau Seit über 40 Jahren planen und realisieren wir Projekte in der Wasserwirtschaft, Abwassertechnik und…” Source: RevenueBase Database · checked Sep 20, 2026
8	Aquasoil Ingenieure & Geologen Gmbh	Indirect evidence	Westheim, GermanyHQ checked Sep 20, 2026	11-50	15 contacts →
	Indirect evidence “AQUASOIL Ingenieure & Geologen GmbH excels in groundwater and surface water modelling, geotechnics, contaminated sites, water mangement, hydrogeology, hydrology, soil and…” Source: RevenueBase Database · checked Sep 20, 2026
9	Geries Ingenieure	Indirect evidence	Gleichen-reinhausen, GermanyHQ checked Sep 20, 2026	11-50	14 contacts →
	Indirect evidence “Geries Ingenieure Büro für Standorterkundung GmbH is a mechanical or industrial engineering company based out of Gleichen-Reinhausen, Germany.” Source: RevenueBase Database · checked Sep 20, 2026
10	Ingenieurbüro BWS Gmbh	Indirect evidence	Hamburg, GermanyHQ checked Sep 20, 2026	11-50	13 contacts →
	Indirect evidence “Die BWS GmbH ist eine Ingenieurgesellschaft mit Hauptsitz in Hamburg.” Source: RevenueBase Database · checked Sep 20, 2026
11	Unger Ingenieure Ingenieurgesellschaft MBH	Indirect evidence	Darmstadt, GermanyHQ checked Sep 20, 2026	1-10	12 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
12	SEA & SUN Technology	Indirect evidence	Trappenkamp, GermanyHQ checked Sep 20, 2026	11-50	11 contacts →
	Indirect evidence “Sea & Sun Technology provides best-in-class probes and solutions for the maritime and limnic sector to measure water quality.” Source: RevenueBase Database · checked Sep 20, 2026
13	AKS Aqua	Indirect evidence	Frankfurt (oder) (frankfurt), GermanyHQ checked Sep 20, 2026	11-50	11 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
14	IPP Hydro Consult Gmbh	Indirect evidence	Cottbus, GermanyHQ checked Sep 20, 2026	51-200	9 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
15	Base Technologies Gmbh	Indirect evidence	München, GermanyHQ checked Sep 20, 2026	11-50	8 contacts →
	Indirect evidence “Die BASE TECHNOLOGIES GmbH ist seit über 20 Jahren aktiv für Nachhaltigkeit und Transformation.” Source: RevenueBase Database · checked Sep 20, 2026
16	ITT	Indirect evidence	Laboe, GermanyHQ checked Sep 20, 2026	11-50	8 contacts →
	Indirect evidence “ITT - Port Consult GmbH is an engineering & planning company focussing on hydraulic engineering, harbour planning and coastal engineering based at 24235 Laboe, Schleswig-Holstein…” Source: RevenueBase Database · checked Sep 20, 2026
17	Sydro Consult Gmbh	Indirect evidence	Darmstadt, GermanyHQ checked Sep 20, 2026	1-10	8 contacts →
	Indirect evidence “SYDRO Consult is an independent consulting company with in-depth knowledge and long-lasting experience in the field of Water Resources Management.” Source: RevenueBase Database · checked Sep 20, 2026
18	Nicola Engineering Gmbh	Partial evidence	Halstenbek, GermanyHQ checked Sep 20, 2026	1-10	7 contacts →
	Partial evidence “Nicola Engineering is a dynamic engineering office for marine and land surveying with over 40 years' experience in hydrography.” Source: RevenueBase Database · checked Sep 20, 2026
19	Hydor Consult Gmbh	Indirect evidence	Berlin, GermanyHQ checked Sep 20, 2026	1-10	7 contacts →
	Indirect evidence “Die HYDOR Consult GmbH bietet seit zwanzig Jahren unabhängige Planungs- und Beratungsleis-tungen am Standort Am Borsigturm in Berlin-Tegel in folgenden Bereichen…” Source: RevenueBase Database · checked Sep 20, 2026
20	Deutsche Abwasser-Reinigungs-Gesellschaft MBH Berlin	Indirect evidence	Berlin, GermanyHQ checked Sep 20, 2026	11-50	7 contacts →
	Indirect evidence “Seit über einem Jahrhundert steht die DAR GmbH Berlin für Qualität und Innovation in der Siedlungswasserwirtschaft.” Source: RevenueBase Database · checked Sep 20, 2026
21	Ingenieurbüro Achten UND Jansen Gmbh	Indirect evidence	Aachen, GermanyHQ checked Sep 20, 2026	11-50	6 contacts →
	Indirect evidence “Die Siedlungswasserwirtschaft mit der Wasserversorgung, der Abwasserableitung und Abwasserbehandlung, der konstruktive Wasserbau mit Hochwasserschutz und Gewässerausbau, der…” Source: RevenueBase Database · checked Sep 20, 2026
22	Piewak & Partner Gmbh	Indirect evidence	Bayreuth, GermanyHQ checked Sep 20, 2026	11-50	4 contacts →
	Indirect evidence “Die Piewak & Partner GmbH besteht seit 1990.” Source: RevenueBase Database · checked Sep 20, 2026
23	Emscher Gesellschaft FÜR Wassertechnik MBH	Indirect evidence	GermanyHQ checked Sep 20, 2026	11-50	4 contacts →
	Indirect evidence “Ingenieurdienstleistungen in den Bereichen Boden, Gewässer, Grund, Regen- und Abwasser” Source: RevenueBase Database · checked Sep 20, 2026
24	Planungsbüro Hömme GBR	Indirect evidence	Pölich, GermanyHQ checked Sep 20, 2026	1-10	4 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
25	GUV Ges. F. Geohydraulik, Umweltberatung, Verfahrens- U. Ingenieurtechnik MBH	Indirect evidence	Minden, GermanyHQ checked Sep 20, 2026	1-10	3 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 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: hydrological survey 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 hydrological survey companies.
Partial evidence: Its own public description names part of hydrological survey companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name hydrological survey 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 106 hydrological survey companies based in Germany

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Hydrological survey companies based in Germany at a glance

As of Sep 20, 2026

24.5%Verified-email coverage

7.3Average contacts per company

1-10Median size (employees)

4.7%Largest-city concentration · Berlin

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

Email recency for this list is measured worldwide rather than for Germany, so it is reported there. Company counts and contact totals on this page are exact for Germany, over 106 companies.

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 hydrological survey 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.
What qualifies: Companies headquartered in Germany whose own description of what they do matches “hydrological survey 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 hydrological survey 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 hydrological survey companies, 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 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, 189 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 20, 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.

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 hydrological survey 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 hydrological survey companies are there based in Germany?

RevenueBase identified 106 hydrological survey companies 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?

CES Consulting Engineers Salzgitter Gmbh, headquartered in Braunschweig, tops this list with the largest team on record.

Which city has the most hydrological survey companies?

Berlin leads with 5 headquartered companies, followed by Darmstadt (4) and Dresden (4).

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 189 verified decision-maker contacts tracked across these 106 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 20, 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.