Company lists · Data refreshed September 2026

Top 25 Hydrology consulting firms based in France

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

Compiled by the RevenueBase Data Team Data refreshed Sep 3, 2026 223 companies tracked

RevenueBase identified 223 hydrology consulting firms headquartered in France as of September 2026 and tracks 2,458 professional contacts across them, including 996 with verified work emails and 41 with mobile numbers. Paris is the largest hub.

This list covers hydrology consulting firms 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, 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

223Companies

2,458Contacts tracked

996Verified emails

41Mobile numbers

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The 25 largest hydrology consulting firms based in France

Ranked by team size

Top 25 of 223 hydrology consulting firms based in France, ranked by team size, largest first. Data refreshed Sep 3, 2026. Evidence rates how directly each company's own description names hydrology 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	AltereoIndirect evidence	Venelles, FranceHQ checked Sep 3, 2026	51-200	222
	“Awakening Environmental Smartness.” Source: company website · checked Sep 3, 2026
2	BRL GroupeIndirect evidence	Nimes, FranceHQ checked Sep 3, 2026	501-1,000	143
	“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: company website · checked Sep 3, 2026
3	Setec Énergie EnvironnementIndirect evidence	Paris, FranceHQ checked Sep 3, 2026	51-200	141
	“Setec énergie environnement is a subsidiary of the setec group, one of France’s leading engineering firms (3 300 employees).” Source: company website · checked Sep 3, 2026
4	ArtifexIndirect evidence	Albi, FranceHQ checked Sep 3, 2026	51-200	124
	“ARTIFEX, une société de SOCOTEC est un bureau d’ingénierie et de conseil en environnement, créé en janvier 1983 et basé à Albi dans le Tarn.” Source: company website · checked Sep 3, 2026
5	AquabioIndirect evidence	Saint-germain Du Puch, FranceHQ checked Sep 3, 2026	51-200	82
	“AQUABIO est un bureau d'études indépendant dont le métier est de produire, valoriser, expertiser des données hydrobiologiques.” Source: company website · checked Sep 3, 2026
6	OGIIndirect evidence	Montreuil, FranceHQ checked Sep 3, 2026	51-200	64
	“OGI est un bureau d'études spécialisé en aménagement d’espaces publics.” Source: company website · checked Sep 3, 2026
7	HydretudesIndirect evidence	Argonay, FranceHQ checked Sep 3, 2026	51-200	61
	“HYDRETUDES est un bureau d’études spécialisé dans l’ingénierie de l’eau, des risques naturels et de l’environnement.” Source: company website · checked Sep 3, 2026
8	GeoliaIndirect evidence	Morangis, FranceHQ checked Sep 3, 2026	51-200	58
	“Bureau d'Etudes Géotechniques, Hydrogéologie et Sites et Sols Pollués, Ingénierie des sols et fondations.” Source: company website · checked Sep 3, 2026
9	Prolog IngenieriePartial evidence	Paris, FranceHQ checked Sep 3, 2026	51-200	56
	“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: company website · checked Sep 3, 2026
10	Aquascop SarlIndirect evidence	Beaucouzé, FranceHQ checked Sep 3, 2026	51-200	53
	“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: company website · checked Sep 3, 2026
11	SEIRIIndirect evidence	Montpellier, FranceHQ checked Sep 3, 2026	11-50	43
	“Réaliser vos projets en toute SEIRInité!” Source: company website · checked Sep 3, 2026
12	Sepia ConseilsIndirect evidence	Paris, FranceHQ checked Sep 3, 2026	11-50	43
	“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: company website · checked Sep 3, 2026
13	CDESIndirect evidence	Luzancy, FranceHQ checked Sep 3, 2026	51-200	41
	“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: company website · checked Sep 3, 2026
14	Réalités EnvironnementIndirect evidence	Trevoux, FranceHQ checked Sep 3, 2026	11-50	34
	“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: company website · checked Sep 3, 2026
15	OsgapiIndirect evidence	Nimes, FranceHQ checked Sep 3, 2026	11-50	23
	“OSGAPI est un bureau d'étude spécialisé dans la gestion du risque d'inondation assistant les collectivités territoriales mais aussi les particuliers.” Source: company website · checked Sep 3, 2026
16	Cpgf Horizon & FormationIndirect evidence	Avon, FranceHQ checked Sep 3, 2026	11-50	22
	“CPGF HORIZON est un bureau d’ingénierie spécialisé en geo-sciences.” Source: company website · checked Sep 3, 2026
17	HydrosphèreIndirect evidence	Saint-ouen-l'aumône, FranceHQ checked Sep 3, 2026	11-50	21
	“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: company website · checked Sep 3, 2026
18	Confluences ICPartial evidence	Montry, FranceHQ checked Sep 3, 2026	11-50	20
	“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: company website · checked Sep 3, 2026
19	UrbanwaterPartial evidence	Paris, FranceHQ checked Sep 3, 2026	11-50	19
	“Urbanwater, bureau d'études en hydrologie urbaine, développe le lien entre l’eau et les territoires urbains, à toutes les échelles.” Source: company website · checked Sep 3, 2026
20	Alise EnvironnementIndirect evidence	Saint-Jacques-Sur-Darnetal, FranceHQ checked Sep 3, 2026	11-50	15
	“ALISE Environnement est un bureau d'études spécialisé dans le domaine de l'environnement.” Source: company website · checked Sep 3, 2026
21	EGEHIndirect evidence	Limoges, FranceHQ checked Sep 3, 2026	11-50	15
	“From its creation in 1994, our company has been involved in those environmental areas where it can display the expertise of its team of geologists and hydrogeologists.” Source: company website · checked Sep 3, 2026
22	AntemysIndirect evidence	Guereins Guereins, FranceHQ checked Sep 3, 2026	11-50	14
	“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: company website · checked Sep 3, 2026
23	Agence Thierry Maytraud ATMPartial evidence	Paris, FranceHQ checked Sep 3, 2026	11-50	12
	“ATM est un bureau d’études spécialisé en hydrologie urbaine et en paysage, fondé par Thierry Maytraud en 2011.” Source: company website · checked Sep 3, 2026
24	BEPGIndirect evidence	Villers Les Nancy, FranceHQ checked Sep 3, 2026	11-50	12
	“BEPG, BET indépendant, propose une prestation globale dans les domaines de l’eau et de l’environnement, situé à Nancy, Lorraine (54).” Source: company website · checked Sep 3, 2026
25	Acri-InIndirect evidence	Biot, FranceHQ checked Sep 3, 2026	11-50	11
	“The company specializes in maritime, river and coastal engineering.” Source: company website · checked Sep 3, 2026

Showing 25 of 223 hydrology consulting firms based in France

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Hydrology consulting firms based in France at a glance

As of Sep 3, 2026

1-10Median size (employees)

ParisLargest hub · 17 HQs

41Contacts with mobile numbers

Sep 3, 2026Data refreshed

Companies by employee count

1-10

156

11-50

51-200

201-500

501-1,000

Verified emails by last verification

0–30

31–60

61–90

590

90–180

318

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 hydrology 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 France whose own description of what they do matches “hydrology 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 hydrology consulting firms, 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 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, 996 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.

Frequently asked

How many hydrology consulting firms are there based in France?

RevenueBase identified 223 hydrology consulting firms 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?

Altereo, headquartered in Paris, tops this list with the largest team on record.

Which city has the most hydrology consulting firms?

Paris leads with 17 headquartered companies, followed by Toulouse (7) and Lyon (7).

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 996 verified decision-maker contacts tracked across these 223 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.