Company lists · Data refreshed September 2026
Top 25 Hydrogeology consultants based in the Netherlands
RevenueBase identified 240 hydrogeology consultants headquartered in the Netherlands as of September 2026 and tracks 3,965 professional contacts across them, including 2,165 with verified work emails. Amsterdam is the largest hub.
This list covers hydrogeology consultants headquartered in the Netherlands, 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.
The 25 largest hydrogeology consultants based in the Netherlands
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,021 contacts → | ||||
Indirect evidence “Deltares is an independent knowledge institute for applied research in the field of water and subsurface.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 218 contacts → | ||||
Indirect evidence “Wij zijn Nebest: een onafhankelijk ingenieurs-/adviesbureau, gespecialiseerd in inspectie, diepgaand technisch onderzoek en advies maar ook projectmanagement in de bouw, infra…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 158 contacts → | ||||
Indirect evidence “About the company: Van den Herik: hydraulic engineering in all its guises Van den Herik has been active in the field of hydraulic engineering since the 1940s.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 116 contacts → | ||||
Indirect evidence “Praktisch, nuchter en deskundig.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 94 contacts → | ||||
Indirect evidence “HKV, de kennisondernemer voor water en veiligheid HKV levert, als onafhankelijk bureau, hoogwaardige onderzoek- en adviesdiensten op het gebied van water en veiligheid in binnen-…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 80 contacts → | ||||
Indirect evidence “At IF Technology we are committed to the transition from the use of fossil fuels to sustainable energy.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 72 contacts → | ||||
Indirect evidence “Wiertsema & Partners is al ruim 46 jaar expert in het uitvoeren en leveren van geo- en milieutechnisch onderzoek, monitoring en advies.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 65 contacts → | ||||
Partial evidence “Nelen & Schuurmans is a water management consultancy & IT company.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 60 contacts → | ||||
Indirect evidence “PanTerra Geoconsultants is a leading geological service provider with over 35 years of worldwide industry experience.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 54 contacts → | ||||
Indirect evidence “Advies in en om water Tijhuis Ingenieurs is een onafhankelijk advies- en ingenieursbureau.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 46 contacts → | ||||
Indirect evidence “Deskundig advies op het gebied van: Geo Engineering & Omgevingsbeïnvloeding.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 46 contacts → | ||||
Indirect evidence “Ingenieursbureau Boorsma is een advies- en ingenieursbureau dat opdrachten uitvoert binnen de branches “bouw en civiel” en “milieu en geologie”.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 44 contacts → | ||||
Indirect evidence “Van der Straaten staat bekend als een ondernemende aannemer met meer dan honderd jaar ervaring.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 43 contacts → | ||||
Indirect evidence “Prommenz is een jong, snelgroeiend advies- en ingenieursbureau uit de kop van Noord-Holland.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 39 contacts → | ||||
Indirect evidence “Wij zijn Silt.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 36 contacts → | ||||
Indirect evidence “Een veilige omgeving om in te bouwen, wonen en werken.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 36 contacts → | ||||
Indirect evidence “Tjaden is een gespecialiseerde, in binnen- en buitenland opererende aannemer op het gebied van bronbemaling, boringen, grondwatersystemen en waterbehandelingstechniek.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 34 contacts → | ||||
Indirect evidence “SAMENWERKEN ZODAT HET WÉRKT Bijna 90 jaar ervaring in een modern jasje.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 31 contacts → | ||||
Indirect evidence “T&A Survey is an experienced, independent and technologically advanced subsurface research company specialised in subsurface research, geothermal energy and mining.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 31 contacts → | ||||
Partial evidence “The Periplus Group is a consultancy organization providing specialized personnel and knowledge in the field of hydrography and related disciplines such as geology, geophysics…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 30 contacts → | ||||
Indirect evidence “BWZ Ingenieurs is eind 2007 opgericht en is een middelgroot bureau voor ingenieurs- en adviesdiensten.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 29 contacts → | ||||
Partial evidence “The engineers and consultants SGS Roos+Bijl provide consulting and engineering services for projects in electrical engineering, telecommunications, water, gas, heat, road and rail…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 28 contacts → | ||||
Indirect evidence “Eén is meer dan honderd.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 26 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 26 contacts → | ||||
Indirect evidence “wij leven geo’ - partner in advies, project en detachering - 2500 jaar Geo ervaring in huis - deskundig op elke locatie - inhoudelijk betrokken werkgever” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
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: hydrogeology consultants. 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 hydrogeology consultants.
- Partial evidence
- Its own public description names part of hydrogeology consultants, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name hydrogeology consultants. 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 240 hydrogeology consultants based in the Netherlands
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Hydrogeology consultants based in the Netherlands at a glance
As of Sep 20, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for Netherlands, so it is reported there. Company counts and contact totals on this page are exact for Netherlands, over 240 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 hydrogeology consultants, 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 the Netherlands whose own description of what they do matches “hydrogeology consultants”. 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 hydrogeology consultants), 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 hydrogeology consultants, and records with no verified work email. Companies headquartered outside Netherlands 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, 2,165 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 hydrogeology consultants, 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 hydrogeology consultants are there based in the Netherlands?
RevenueBase identified 240 hydrogeology consultants headquartered in the Netherlands 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?
Deltares, headquartered in Hv, tops this list with the largest team on record.
Which city has the most hydrogeology consultants?
Amsterdam leads with 7 headquartered companies, followed by Rotterdam (6) and Amersfoort (5).
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 2,165 verified decision-maker contacts tracked across these 240 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.
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