Company lists · Data refreshed September 2026

Top 25 Hydrogeology consulting services based in the United Kingdom

Name: Hydrogeology consulting services based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 209 companies tracked

RevenueBase identified 209 hydrogeology consulting services headquartered in the United Kingdom as of September 2026 and tracks 1,222 professional contacts across them, including 533 with verified work emails. London is the largest hub.

This list covers hydrogeology consulting services headquartered in the United Kingdom, 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

209Companies

1,222Contacts tracked

533Verified emails

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The 25 largest hydrogeology consulting services based in the United Kingdom

Ranked by team size

Top 25 of 209 hydrogeology consulting services based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to hydrogeology consulting services: 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	Zetica Limited	Indirect evidence	Eynsham, United KingdomHQ checked Sep 21, 2026	51-200	75 contacts →
	Indirect evidence “Zetica is the UK’s leader in engineering and environmental geophysics, with an enviable reputation for objective advice, novel problem solving, consistently high-quality surveys…” Source: RevenueBase Database · checked Sep 21, 2026
2	WJ UK	Indirect evidence	Kings Langley, United KingdomHQ checked Sep 21, 2026	51-200	65 contacts →
	Indirect evidence “Part of the WJ Group, WJ UK offer a complete groundwater control and management service, which encompasses design, installation and maintenance programmes to businesses throughout…” Source: RevenueBase Database · checked Sep 21, 2026
3	Waterco Datrys	Indirect evidence	Ruthin, United KingdomHQ checked Sep 21, 2026	11-50	59 contacts →
	Indirect evidence “Waterco Datrys is a leading consultancy in water and environmental engineering, formed through the merger of Waterco and Datrys in 2024.” Source: RevenueBase Database · checked Sep 21, 2026
4	OIL Plus LTD	Indirect evidence	Newbury, United KingdomHQ checked Sep 21, 2026	11-50	36 contacts →
	Indirect evidence “As a world-leading independent consultancy in oil and gas field water management, our team provides on-site fluid sampling, laboratory analysis, specialty monitoring equipment for…” Source: RevenueBase Database · checked Sep 21, 2026
5	Geotechnical Consulting Group	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	29 contacts →
	Partial evidence “Geotechnical Consulting Group (GCG) is one of the world’s leading independent geotechnical engineering consultancies, recognised for delivering innovative, research driven…” Source: RevenueBase Database · checked Sep 21, 2026
6	Johnson Poole & Bloomer JPB	Indirect evidence	Brierley Hill, United KingdomHQ checked Sep 21, 2026	11-50	28 contacts →
	Indirect evidence “Johnson Poole and Bloomer is an independent multidisciplinary geoenvironmental and mineral consultancy operating in several closely related and complementary areas - Geotechnical…” Source: RevenueBase Database · checked Sep 21, 2026
7	A F Howland Associates	Indirect evidence	Norwich, United KingdomHQ checked Sep 21, 2026	11-50	23 contacts →
	Indirect evidence “A F Howland Associates was formed in 1981 to provide an independent practice offering a specialist service in geotechnical engineering and related disciplines.” Source: RevenueBase Database · checked Sep 21, 2026
8	Envireau Water	Indirect evidence	Melbourne, United KingdomHQ checked Sep 21, 2026	11-50	21 contacts →
	Indirect evidence “Envireau Water is one of the UK's leading independent consultancies specialising in water management and environmental regulation.” Source: RevenueBase Database · checked Sep 21, 2026
9	Leap Environmental	Indirect evidence	Surrey, United KingdomHQ checked Sep 21, 2026	11-50	21 contacts →
	Indirect evidence “Leap Environmental is an environmentally conscious organisation providing sustainable engineering solutions to the construction industry, local authorities and land owners.” Source: RevenueBase Database · checked Sep 21, 2026
10	Wardell Armstrong International NOW SLR	Indirect evidence	Truro, United KingdomHQ checked Sep 21, 2026	201-500	20 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
11	Ternan Energy	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 21, 2026	11-50	19 contacts →
	Indirect evidence “We are experts in marine geotechnics, geophysics, engineering geology and foundation engineering.” Source: RevenueBase Database · checked Sep 21, 2026
12	CQA International	Indirect evidence	Keele, United KingdomHQ checked Sep 21, 2026	11-50	19 contacts →
	Indirect evidence “CQA International Ltd (CQA) is an environmental engineering consultancy that specialises in geotechnical and mining engineering, containment systems, waste management and…” Source: RevenueBase Database · checked Sep 21, 2026
13	MCL Consulting	Partial evidence	Belfast, United KingdomHQ checked Sep 21, 2026	11-50	18 contacts →
	Partial evidence “Office Locations Belfast Based Consultancy Firm About Us MCL Consulting always operate as a team.” Source: RevenueBase Database · checked Sep 21, 2026
14	Stuart Wells	Indirect evidence	Shropham, United KingdomHQ checked Sep 21, 2026	11-50	18 contacts →
	Indirect evidence “Stuart Wells boasts over 30 years’ experience in construction dewatering and well services.” Source: RevenueBase Database · checked Sep 21, 2026
15	Water Environment Limited	Partial evidence	Surbiton, United KingdomHQ checked Sep 21, 2026	11-50	17 contacts →
	Partial evidence “Water Environment Limited provides technical consulting services, specific to the water and environmental sectors of engineering.” Source: RevenueBase Database · checked Sep 21, 2026
16	Soils Limited	Indirect evidence	Tadworth, United KingdomHQ checked Sep 21, 2026	11-50	17 contacts →
	Indirect evidence “Geotechnical and Environmental Consultants that have offices across the South of England and Europe.” Source: RevenueBase Database · checked Sep 21, 2026
17	Stillwater Associates LTD	Indirect evidence	Reigate, United KingdomHQ checked Sep 21, 2026	11-50	16 contacts →
	Indirect evidence “Stillwater Associates is dedicated to reservoir safety and water engineering services.” Source: RevenueBase Database · checked Sep 21, 2026
18	Terra Firma	Indirect evidence	Exeter, United KingdomHQ checked Sep 21, 2026	11-50	16 contacts →
	Indirect evidence “Terra Firma is a professional Geo-Technical and Geo-Environmental Engineering and Ground Investigation Consultancy, operating throughout the UK.” Source: RevenueBase Database · checked Sep 21, 2026
19	Groundtech Consulting Limited	Partial evidence	Orford Court, United KingdomHQ checked Sep 21, 2026	11-50	15 contacts →
	Partial evidence “Groundtech Consulting Limited are a Geo-Environmental Consultancy and Engineering Company offering a high quality service for a competitive price.” Source: RevenueBase Database · checked Sep 21, 2026
20	OGI Groundwater Specialists LTD	Indirect evidence	Durham, United KingdomHQ checked Sep 21, 2026	11-50	14 contacts →
	Indirect evidence “OGI has more than 30 years of experience in providing groundwater related services to clients and contractors in the United Kingdom and abroad.” Source: RevenueBase Database · checked Sep 21, 2026
21	Geoscience Limited	Indirect evidence	Falmouth, United KingdomHQ checked Sep 21, 2026	11-50	14 contacts →
	Indirect evidence “GeoScience Limited is an independent earth science consultancy, providing engineering, geomechanics and reservoir geology solutions to the oil, gas and geothermal industries.” Source: RevenueBase Database · checked Sep 21, 2026
22	Penny Anderson Associates LTD	Indirect evidence	Buxton, United KingdomHQ checked Sep 21, 2026	11-50	14 contacts →
	Indirect evidence “Penny Anderson Associates has provided expert advice on ecology, hydrology and sustainable land management since the 1970s and has built up a reputation for professional integrity…” Source: RevenueBase Database · checked Sep 21, 2026
23	WCI Group LTD	Indirect evidence	Taunton, United KingdomHQ checked Sep 21, 2026	11-50	14 contacts →
	Indirect evidence “WCI Group Ltd is the leading expert in water and wastewater engineering, delivering innovative solutions with over four decades of expertise.” Source: RevenueBase Database · checked Sep 21, 2026
24	FWS Consultants LTD	Indirect evidence	Durham, United KingdomHQ checked Sep 21, 2026	11-50	13 contacts →
	Indirect evidence “FWS Consultants Ltd is an established, internationally recognised consultancy with over 40 years' experience providing ground investigation, geo-environmental, geotechnical and…” Source: RevenueBase Database · checked Sep 21, 2026
25	Geol Consultants Limited	Indirect evidence	Team Valley Trading Estate, United KingdomHQ checked Sep 21, 2026	11-50	13 contacts →
	Indirect evidence “Geol Consultants Limited (GEOL) is a Company based out of Tectonic House, Unit 11, Queens Court North, Third Avenue, Team Valley Trading Estate, Gateshead, Tyne and Wear, NE11…” 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: hydrogeology consulting services. 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 consulting services.
Partial evidence: Its own public description names part of hydrogeology consulting services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name hydrogeology consulting services. 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 209 hydrogeology consulting services based in the United Kingdom

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Hydrogeology consulting services based in the United Kingdom at a glance

As of Sep 21, 2026

43.6%Verified-email coverage

5.8Average contacts per company

1-10Median size (employees)

6.2%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

150

11-50

51-200

201-500

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 209 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 consulting services, 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 United Kingdom whose own description of what they do matches “hydrogeology consulting services”. 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 consulting services), 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 consulting services, and records with no verified work email. Companies headquartered outside United Kingdom 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, 533 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 hydrogeology consulting services, 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 consulting services are there based in the United Kingdom?

RevenueBase identified 209 hydrogeology consulting services headquartered in the United Kingdom 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?

Zetica Limited, headquartered in Eynsham, tops this list with the largest team on record.

Which city has the most hydrogeology consulting services?

London leads with 13 headquartered companies, followed by Edinburgh (6) and Aberdeen (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 533 verified decision-maker contacts tracked across these 209 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.