Company lists · Data refreshed September 2026

Top 25 Water resources consulting firms based in the Netherlands

Name: Water resources consulting firms based in the Netherlands
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 115 companies tracked

RevenueBase identified 115 water resources consulting firms headquartered in the Netherlands as of September 2026 and tracks 1,870 professional contacts across them, including 1,038 with verified work emails. Amsterdam is the largest hub.

This list covers water resources consulting firms 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 21, 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 21, 2026 86% judged on-target in blind review

115Companies

1,870Contacts tracked

1,038Verified emails

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The 25 largest water resources consulting firms based in the Netherlands

Ranked by team size

Top 25 of 115 water resources consulting firms based in the Netherlands, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to water resources consulting firms: 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	Nijhuis Saur Industries	Strong evidence	Doetinchem, NetherlandsHQ checked Sep 21, 2026	1,001-5,000	609 contacts →
	Strong evidence “Founded in 1904, Nijhuis Saur Industries provides solid and adaptive solutions for sustainable and resilient water use, energy- and resource recovery.” Source: RevenueBase Database · checked Sep 21, 2026
2	HET Waterlaboratorium	Partial evidence	Haarlem, NetherlandsHQ checked Sep 21, 2026	51-200	102 contacts →
	Partial evidence “Het Waterlaboratorium is een zelfstandig opererend semipubliek bedrijf met drie sterke aandeelhouders: Dunea Duin en Water, PWN Waterleidingbedrijf Noord-Holland en Waternet…” Source: RevenueBase Database · checked Sep 21, 2026
3	WLN	Indirect evidence	Glimmen, NetherlandsHQ checked Sep 21, 2026	51-200	101 contacts →
	Indirect evidence “WLN is een onafhankelijk partner in onderzoek en advies voor drink, industrie- en afvalwater.” Source: RevenueBase Database · checked Sep 21, 2026
4	HKV Lijn In Water	Partial evidence	Lelystad, NetherlandsHQ checked Sep 21, 2026	51-200	94 contacts →
	Partial 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 21, 2026
5	flux.partners	Partial evidence	Diemen, NetherlandsHQ checked Sep 21, 2026	51-200	92 contacts →
	Partial evidence “At Flux Partners, you'll be part of a team of entrepreneurial and experienced specialists serving clients in the infrastructure, energy, water, industry, and government sectors.” Source: RevenueBase Database · checked Sep 21, 2026
6	C-Mark Consultants	Strong evidence	Deventer, NetherlandsHQ checked Sep 21, 2026	51-200	69 contacts →
	Strong evidence “C mark is leading in research and consulting in the fields of water safety and water quality.” Source: RevenueBase Database · checked Sep 21, 2026
7	Nelen & Schuurmans	Partial evidence	Utrecht, NetherlandsHQ checked Sep 21, 2026	51-200	65 contacts →
	Partial evidence “Nelen & Schuurmans is a water management consultancy & IT company.” Source: RevenueBase Database · checked Sep 21, 2026
8	Tijhuis Ingenieurs BV	Partial evidence	Hoorn, NetherlandsHQ checked Sep 21, 2026	51-200	54 contacts →
	Partial evidence “Advies in en om water Tijhuis Ingenieurs is een onafhankelijk advies- en ingenieursbureau.” Source: RevenueBase Database · checked Sep 21, 2026
9	Lysias Consulting Group	Indirect evidence	Amersfoort, NetherlandsHQ checked Sep 21, 2026	11-50	43 contacts →
	Indirect evidence “The consultants of Lysias share a passion for public administration and work with heart and soul on societal issues.” Source: RevenueBase Database · checked Sep 21, 2026
10	RSK Netherlands	Indirect evidence	Ridderkerk, NetherlandsHQ checked Sep 21, 2026	11-50	41 contacts →
	Indirect evidence “Welkom bij RSK Netherlands, onderdeel van de RSK Group PLC.” Source: RevenueBase Database · checked Sep 21, 2026
11	Hydroscope	Indirect evidence	Breda, NetherlandsHQ checked Sep 21, 2026	51-200	37 contacts →
	Indirect evidence “Hydroscope is Nederlands grootste adviesbureau op het gebied van waterkwaliteit en -veiligheid binnen gebouwen.” Source: RevenueBase Database · checked Sep 21, 2026
12	BWZ Ingenieurs	Indirect evidence	Everdingen, NetherlandsHQ checked Sep 21, 2026	11-50	30 contacts →
	Indirect evidence “BWZ Ingenieurs is eind 2007 opgericht en is een middelgroot bureau voor ingenieurs- en adviesdiensten.” Source: RevenueBase Database · checked Sep 21, 2026
13	Colsen	Partial evidence	Hulst, NetherlandsHQ checked Sep 21, 2026	11-50	28 contacts →
	Partial evidence “Colsen B.V, is an international expert with 30+ years of expertise in the field of water, environment and sustainable energy.” Source: RevenueBase Database · checked Sep 21, 2026
14	CDR International	Partial evidence	Amersfoort, NetherlandsHQ checked Sep 21, 2026	11-50	24 contacts →
	Partial evidence “CDR International B.V.(CDR) is an independent medium-sized Engineering Consultancy firm in the Water Sector, operating globally and having its roots in the Netherlands.” Source: RevenueBase Database · checked Sep 21, 2026
15	Stormvloed	Indirect evidence	Amsterdam, NetherlandsHQ checked Sep 21, 2026	11-50	23 contacts →
	Indirect evidence “Stormvloed is een jonge en snelgroeiende adviesorganisatie in integraal projectmanagement en projectbeheersing.” Source: RevenueBase Database · checked Sep 21, 2026
16	Henk VAN Tongeren Water & Techniek	Partial evidence	Apeldoorn, NetherlandsHQ checked Sep 21, 2026	51-200	22 contacts →
	Partial evidence “Henk van Tongeren Henk van Tongeren is al meer dan 70 jaar dé vertrouwde partner in water en techniek.” Source: RevenueBase Database · checked Sep 21, 2026
17	JMA	Partial evidence	Zeist, NetherlandsHQ checked Sep 21, 2026	11-50	22 contacts →
	Partial evidence “JMA is een veelzijdig milieuadviesbureau dat zich richt op vier belangrijke milieuaspecten: afval, water, milieuzorg en energie.” Source: RevenueBase Database · checked Sep 21, 2026
18	Verhoeve	Partial evidence	Dordrecht, NetherlandsHQ checked Sep 21, 2026	51-200	22 contacts →
	Partial evidence “Verhoeve Nederland BV is specialized in solving soil & water problems for public and private clients.” Source: RevenueBase Database · checked Sep 21, 2026
19	DE Aquanoom B.V	Indirect evidence	Berkel En Rodenrijs, NetherlandsHQ checked Sep 21, 2026	11-50	21 contacts →
	Indirect evidence “De Aquanoom verleent als dynamisch en enthousiast adviesbureau diensten en creatieve oplossingen op het gebied van oppervlaktewater en oevers.” Source: RevenueBase Database · checked Sep 21, 2026
20	Futurewater	Strong evidence	Wageningen, NetherlandsHQ checked Sep 21, 2026	11-50	20 contacts →
	Strong evidence “FutureWater is a global research and consulting organization that drives innovation by combining scientific research with practical solutions for water management.” Source: RevenueBase Database · checked Sep 21, 2026
21	Eindelijkadvies	Indirect evidence	’s-hertogenbosch, NetherlandsHQ checked Sep 21, 2026	11-50	19 contacts →
	Indirect evidence “EindelijkAdvies!” Source: RevenueBase Database · checked Sep 21, 2026
22	Drong Omgeving & Techniek	Indirect evidence	Barneveld, NetherlandsHQ checked Sep 21, 2026	1-10	18 contacts →
	Indirect evidence “Drong Omgeving & Techniek richt zich op de invulling van de buitenruimte en de ondergrondse infrastructuur.” Source: RevenueBase Database · checked Sep 21, 2026
23	DEN Boer CCI	Indirect evidence	Nieuwpoort, NetherlandsHQ checked Sep 21, 2026	11-50	18 contacts →
	Indirect evidence “Den Boer CCI is 10 jaar geleden ontstaan door het samenbrengen van Den Boer Consult en ingenieursbureau CCI.” Source: RevenueBase Database · checked Sep 21, 2026
24	Blueprofs	Indirect evidence	Herveld, NetherlandsHQ checked Sep 21, 2026	11-50	17 contacts →
	Indirect evidence “Blueprofs helpt organisaties in de watersector bij huidige en toekomstige uitdagingen.” Source: RevenueBase Database · checked Sep 21, 2026
25	KYL B.V	Indirect evidence	's-hertogenbosch, NetherlandsHQ checked Sep 21, 2026	1-10	14 contacts →
	Indirect evidence “KYL is een onafhankelijk adviesbureau met professionals die gespecialiseerd zijn in datamanagement binnen de watersector.” Source: RevenueBase Database · checked Sep 21, 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: water resources consulting firms. 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 water resources consulting firms.
Partial evidence: Its own public description names part of water resources consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name water resources consulting firms. 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 115 water resources consulting firms based in the Netherlands

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Water resources consulting firms based in the Netherlands at a glance

As of Sep 21, 2026

55.5%Verified-email coverage

16.3Average contacts per company

1-10Median size (employees)

5.2%Largest-city concentration · Amsterdam

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

1,001-5,000

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 115 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 water resources consulting firms, 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 “water resources consulting firms”. 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 water resources consulting firms), 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 water resources consulting firms, 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, 1,038 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 21, 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 water resources consulting firms, 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 water resources consulting firms are there based in the Netherlands?

RevenueBase identified 115 water resources consulting firms 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?

Nijhuis Saur Industries, headquartered in Cd, tops this list with the largest team on record.

Which city has the most water resources consulting firms?

Amsterdam leads with 6 headquartered companies, followed by Ad (4) and Nijmegen (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 1,038 verified decision-maker contacts tracked across these 115 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 21, 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.