Company lists · Data refreshed September 2026

Top 25 Hydrological survey companies based in France

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

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 148 companies tracked

RevenueBase identified 148 hydrological survey companies headquartered in France as of September 2026 and tracks 2,303 professional contacts across them, including 1,097 with verified work emails. Paris is the largest hub.

This list covers hydrological survey companies headquartered in France, 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

148Companies

2,303Contacts tracked

1,097Verified emails

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The 25 largest hydrological survey companies based in France

Ranked by team size

Top 25 of 148 hydrological survey companies based in France, 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	Antea Group - France	Indirect evidence	Olivet, FranceHQ checked Sep 20, 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 20, 2026
2	Setec Hydratec	Indirect evidence	Paris, FranceHQ checked Sep 20, 2026	201-500	182 contacts →
	Indirect evidence “Bureau d’études techniques fondé en 1974, setec hydratec s’est positionné en tant qu’expert sur tous les sujets liés à l’ingénierie de l’eau et des sites et sols pollués, afin de…” Source: RevenueBase Database · checked Sep 20, 2026
3	BRL Groupe	Indirect evidence	Nîmes Cedex 5, FranceHQ checked Sep 20, 2026	501-1,000	142 contacts →
	Indirect evidence “A travers ses trois métiers principaux d’aménageur, d’ingénierie et d’exploitation de grands ouvrages hydrauliques, le Groupe BRL (5 sociétés (1), 101,79 M€ de CA, 804 salariés en…” Source: RevenueBase Database · checked Sep 20, 2026
4	Hydretudes	Indirect evidence	Argonay, FranceHQ checked Sep 20, 2026	51-200	64 contacts →
	Indirect evidence “HYDRETUDES est un bureau d’études spécialisé dans l’ingénierie de l’eau, des risques naturels et de l’environnement.” Source: RevenueBase Database · checked Sep 20, 2026
5	Prolog Ingenierie	Indirect evidence	Paris, FranceHQ checked Sep 20, 2026	51-200	56 contacts →
	Indirect evidence “PROLOG INGENIERIE is a consulting engineering firm at the forefront of water management and remote-controlled systems, committed to enhancing water quality and environmental…” Source: RevenueBase Database · checked Sep 20, 2026
6	Aquascop Sarl	Indirect evidence	Beaucouzé, FranceHQ checked Sep 20, 2026	51-200	53 contacts →
	Indirect evidence “Aquascop est un bureau d´études indépendant spécialisé dans l´étude des milieux aquatiques, implantés sur 5 agences en France métropolitaine (Angers, Montpellier, Toulouse, Nancy…” Source: RevenueBase Database · checked Sep 20, 2026
7	Hydroconsult Sarl	Partial evidence	Kervignac, FranceHQ checked Sep 20, 2026	11-50	49 contacts →
	Partial evidence “Hydroconsult is a recognized actor in worldwide Hydrographic and Geophysical Survey's assistance and Marine Consulting, with 20 years experience.” Source: RevenueBase Database · checked Sep 20, 2026
8	BWI	Indirect evidence	Paris, FranceHQ checked Sep 20, 2026	11-50	47 contacts →
	Indirect evidence “BWI - which stands for Blue Water Intelligence, was established in June 2022 in Toulouse, France.” Source: RevenueBase Database · checked Sep 20, 2026
9	Vortex-Io	Indirect evidence	Toulouse, FranceHQ checked Sep 20, 2026	11-50	45 contacts →
	Indirect evidence “vorteX.io offers hydrology monitoring services with compact space-based altimeters from a range of compact and low cost instruments, derived from satellite altimetry, a space…” Source: RevenueBase Database · checked Sep 20, 2026
10	CDES	Indirect evidence	Luzancy, FranceHQ checked Sep 20, 2026	51-200	42 contacts →
	Indirect evidence “CDES, c’est 100 experts engagés et passionnés, qui mettent chaque jour leur savoir-faire au service de la préservation et la valorisation des milieux aquatiques.” Source: RevenueBase Database · checked Sep 20, 2026
11	Sepia Conseils	Indirect evidence	Paris, FranceHQ checked Sep 20, 2026	11-50	42 contacts →
	Indirect evidence “SEPIA Conseils accompagne depuis plus de 30 ans les acteurs de la gestion de l’eau et de l’aménagement du territoire vers des solutions durables, sobres et résilientes face aux…” Source: RevenueBase Database · checked Sep 20, 2026
12	Réalités Environnement	Indirect evidence	Trevoux, FranceHQ checked Sep 20, 2026	11-50	35 contacts →
	Indirect evidence “REALITES Environnement est un bureau d'études indépendant qui intervient pour le compte de collectivités locales, d'industriels et de particuliers sur l'ensemble des études, des…” Source: RevenueBase Database · checked Sep 20, 2026
13	Servicad SUD Ouest	Indirect evidence	Blanquefort, FranceHQ checked Sep 20, 2026	11-50	29 contacts →
	Indirect evidence “Ingénierie & Topographie - Ville et déplacements - Eau et assainissement - Infrastructures de transport - Industrie” Source: RevenueBase Database · checked Sep 20, 2026
14	Osgapi	Indirect evidence	Nimes, FranceHQ checked Sep 20, 2026	11-50	24 contacts →
	Indirect evidence “OSGAPI est un bureau d'étude spécialisé dans la gestion du risque d'inondation assistant les collectivités territoriales mais aussi les particuliers.” Source: RevenueBase Database · checked Sep 20, 2026
15	Cpgf Horizon & Formation	Indirect evidence	Avon, FranceHQ checked Sep 20, 2026	11-50	22 contacts →
	Indirect evidence “CPGF HORIZON est un bureau d’ingénierie spécialisé en geo-sciences.” Source: RevenueBase Database · checked Sep 20, 2026
16	Hydrosphère	Indirect evidence	Saint-ouen-l'aumône, FranceHQ checked Sep 20, 2026	11-50	21 contacts →
	Indirect evidence “Créée en 1998, Hydrosphère est une société indépendante poursuivant l'activité du cabinet E.A.E Consultant fondé en 1993 par Pascal Michel, ingénieur écologue et hydrobiologiste.” Source: RevenueBase Database · checked Sep 20, 2026
17	Urbanwater	Indirect evidence	Paris, FranceHQ checked Sep 20, 2026	11-50	20 contacts →
	Indirect evidence “Urbanwater, bureau d'études en hydrologie urbaine, développe le lien entre l’eau et les territoires urbains, à toutes les échelles.” Source: RevenueBase Database · checked Sep 20, 2026
18	Confluences IC	Indirect evidence	Montry, FranceHQ checked Sep 20, 2026	11-50	20 contacts →
	Indirect evidence “Confluences est un bureau d'études d’ingénieurs conseil qui hérite et prolonge un savoir-faire de plus de 50 ans dans les domaines de l’écologie et de l'hydrologie.” Source: RevenueBase Database · checked Sep 20, 2026
19	Antemys	Indirect evidence	Guéreins, FranceHQ checked Sep 20, 2026	11-50	14 contacts →
	Indirect evidence “ANTEMYS, est reconnue en Rhône-Alpes et au niveau national pour sa compétence, son expérience et sa réactivité dans les domaines de la géotechnique, de l’hydraulique, de…” Source: RevenueBase Database · checked Sep 20, 2026
20	Acri-In	Indirect evidence	Biot, FranceHQ checked Sep 20, 2026	11-50	11 contacts →
	Indirect evidence “The company specializes in maritime, river and coastal engineering.” Source: RevenueBase Database · checked Sep 20, 2026
21	Agence Thierry Maytraud ATM	Indirect evidence	Paris, FranceHQ checked Sep 20, 2026	11-50	11 contacts →
	Indirect evidence “ATM est un bureau d’études spécialisé en hydrologie urbaine et en paysage, fondé par Thierry Maytraud en 2011.” Source: RevenueBase Database · checked Sep 20, 2026
22	Sicaa Etudes	Indirect evidence	Belleville-sur-vie, FranceHQ checked Sep 20, 2026	11-50	11 contacts →
	Indirect evidence “SICAA Études est un bureau d’études spécialisé dans l’ingénierie de l’eau et de l’environnement.” Source: RevenueBase Database · checked Sep 20, 2026
23	BEPG	Indirect evidence	Villers Les Nancy, FranceHQ checked Sep 20, 2026	11-50	11 contacts →
	Indirect evidence “BEPG, BET indépendant, propose une prestation globale dans les domaines de l’eau et de l’environnement, situé à Nancy, Lorraine (54).” Source: RevenueBase Database · checked Sep 20, 2026
24	Eau-Mega Conseil EN Environnement	Indirect evidence	Rochefort, FranceHQ checked Sep 20, 2026	1-10	10 contacts →
	Indirect evidence “environnement, écologie, eau, assainissement, hydraulique” Source: RevenueBase Database · checked Sep 20, 2026
25	Hardy Environnement	Indirect evidence	Ancenis, FranceHQ checked Sep 20, 2026	11-50	10 contacts →
	Indirect evidence “HARDY ENVIRONNEMENT est un bureau d'études et de conseil en environnement et aménagements.” 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 148 hydrological survey companies based in France

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Hydrological survey companies based in France at a glance

As of Sep 20, 2026

47.6%Verified-email coverage

15.6Average contacts per company

1-10Median size (employees)

5.4%Largest-city concentration · Paris

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for France, so it is reported there. Company counts and contact totals on this page are exact for France, over 148 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 France 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 France 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, 1,097 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 France?

RevenueBase identified 148 hydrological survey companies headquartered in France 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?

Antea Group - France, headquartered in Olivet, tops this list with the largest team on record.

Which city has the most hydrological survey companies?

Paris leads with 8 headquartered companies, followed by Lyon (4) and Toulouse (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 1,097 verified decision-maker contacts tracked across these 148 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.