Company lists · Data refreshed September 2026

Top 25 Hydrogeological consulting firms based in the United Kingdom

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

Compiled by the RevenueBase Data Team Data refreshed Sep 3, 2026 406 companies tracked

RevenueBase identified 406 hydrogeological consulting firms headquartered in the United Kingdom as of September 2026 and tracks 4,034 professional contacts across them, including 1,528 with verified work emails and 290 with mobile numbers. London is the largest hub.

This list covers hydrogeological consulting firms 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 3, 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 3, 2026 86% judged on-target in blind review

406Companies

4,034Contacts tracked

1,528Verified emails

290Mobile numbers

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The 25 largest hydrogeological consulting firms based in the United Kingdom

Ranked by team size

Top 25 of 406 hydrogeological consulting firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 3, 2026. RevenueBase Smart Search rates how each company's information relates to hydrogeological 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	KBR Granherne	Partial evidence	Leatherhead, United KingdomHQ checked Sep 3, 2026	501-1,000	656 contacts →
	Partial evidence “KBR Consulting is one of the world's foremost engineering consultancies specializing in the hydrocarbon and energy industry.” Source: RevenueBase Database · checked Sep 3, 2026
2	Lucion	Indirect evidence	Gateshead, United KingdomHQ checked Sep 3, 2026	501-1,000	162 contacts →
	Indirect evidence “We're not just service providers; we're your long-term partners in creating a sustainable, compliant, and efficient future for your assets.” Source: RevenueBase Database · checked Sep 3, 2026
3	Mrag LTD	Indirect evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	100 contacts →
	Indirect evidence “Established in the UK in 1986, MRAG Ltd is a consultancy company dedicated to promoting sustainable use of aquatic resources through sound integrated management policies and…” Source: RevenueBase Database · checked Sep 3, 2026
4	CGL Card Geotechnics Limited	Indirect evidence	Harrogate, United KingdomHQ checked Sep 3, 2026	51-200	86 contacts →
	Indirect evidence “CGL is a leading specialist geotechnical consultancy and has a reputation for solving difficult technical problems with value engineering in construction projects.” Source: RevenueBase Database · checked Sep 3, 2026
5	Zetica Limited	Indirect evidence	Eynsham, United KingdomHQ checked Sep 3, 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 3, 2026
6	Atmos Consulting LTD	Partial evidence	Edinburgh, United KingdomHQ checked Sep 3, 2026	51-200	73 contacts →
	Partial evidence “Atmos Consulting is a modern and dynamic environmental and planning consultancy uniquely structured to offer superior service to its clients by providing cost-effective, robust…” Source: RevenueBase Database · checked Sep 3, 2026
7	WJ UK	Indirect evidence	Kings Langley, United KingdomHQ checked Sep 3, 2026	51-200	64 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 3, 2026
8	Causeway Geotech LTD	Indirect evidence	Ballymoney, United KingdomHQ checked Sep 3, 2026	51-200	61 contacts →
	Indirect evidence “Causeway Geotech Ltd bring together a team of Chartered Geotechnical Engineers with over 100 years of experience in total of offshore and onshore geotechnical ground investigation.” Source: RevenueBase Database · checked Sep 3, 2026
9	E3p	Indirect evidence	Urmston, United KingdomHQ checked Sep 3, 2026	51-200	59 contacts →
	Indirect evidence “E3P was founded because we believed there was a better way to deliver value by creating a different kind of Geotechnical and Environmental Consultancy which focused on technical…” Source: RevenueBase Database · checked Sep 3, 2026
10	IAN Farmer Associates 1998 Limited	Partial evidence	Washington, United KingdomHQ checked Sep 3, 2026	51-200	54 contacts →
	Partial evidence “Ian Farmer Associates has been carrying out ground investigations since 1985 and has built a strong client base of consulting engineers, builders, developers, architects…” Source: RevenueBase Database · checked Sep 3, 2026
11	OIL Plus LTD	Indirect evidence	Newbury, United KingdomHQ checked Sep 3, 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 3, 2026
12	Brownfield Solutions	Indirect evidence	Northwich, United KingdomHQ checked Sep 3, 2026	11-50	34 contacts →
	Indirect evidence “Brownfield Solutions Limited, part of Celnor Group, are specialist Geo-Environmental and Geotechnical Consultants Our vision is to be a widely renowned and highly respected…” Source: RevenueBase Database · checked Sep 3, 2026
13	QEM Solutions	Indirect evidence	Beattock Moffat, United KingdomHQ checked Sep 3, 2026	11-50	32 contacts →
	Indirect evidence “We are QEM Solutions.” Source: RevenueBase Database · checked Sep 3, 2026
14	Harrison Group Environmental Limited	Indirect evidence	Norwich, United KingdomHQ checked Sep 3, 2026	11-50	32 contacts →
	Indirect evidence “Harrison Group Environmental is one of the UK’s leading geotechnical and geoenvironmental engineering firms.” Source: RevenueBase Database · checked Sep 3, 2026
15	Geo-Environmental Services Limited	Indirect evidence	Hurstpierpoint, United KingdomHQ checked Sep 3, 2026	11-50	24 contacts →
	Indirect evidence “Geo-Environmental is an independent practice of geotechnical engineers, environmental consultants, and investigation contractors, who have been established since 1996.” Source: RevenueBase Database · checked Sep 3, 2026
16	Gavia Environmental LTD	Indirect evidence	Perth, United KingdomHQ checked Sep 3, 2026	11-50	24 contacts →
	Indirect evidence “Gavia Environmental Ltd is a specialist environmental consultancy based in Perthshire, Scotland, providing ecological and hydrological services.” Source: RevenueBase Database · checked Sep 3, 2026
17	A F Howland Associates	Indirect evidence	Norwich, United KingdomHQ checked Sep 3, 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 3, 2026
18	Earth Environmental & Geotechnical LTD	Indirect evidence	Stockport, United KingdomHQ checked Sep 3, 2026	11-50	23 contacts →
	Indirect evidence “We are an independent UK based company led by staff that have been providing advice to clients over the past thirty years.” Source: RevenueBase Database · checked Sep 3, 2026
19	GBM Group	Indirect evidence	Twickenham, United KingdomHQ checked Sep 3, 2026	51-200	23 contacts →
	Indirect evidence “GBM is an independent firm of engineering consultants specialising in the development, design and construction of new mining projects and the refurbishment of existing gold…” Source: RevenueBase Database · checked Sep 3, 2026
20	Highwater	Indirect evidence	Nairn, United KingdomHQ checked Sep 3, 2026	51-200	22 contacts →
	Indirect evidence “Specialists in Private Water Supplies.” Source: RevenueBase Database · checked Sep 3, 2026
21	GIP LTD	Indirect evidence	Kingswinford, United KingdomHQ checked Sep 3, 2026	11-50	21 contacts →
	Indirect evidence “Established in the heart of the Black Country in 1982, GIP is now one of the largest geo-environmental and geotechnical engineering companies of its kind in the Midlands…” Source: RevenueBase Database · checked Sep 3, 2026
22	Ternan Energy	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 3, 2026	11-50	19 contacts →
	Indirect evidence “We are experts in marine geotechnics, geophysics, engineering geology and foundation engineering.” Source: RevenueBase Database · checked Sep 3, 2026
23	Wardell Armstrong International Part Of SLR	Indirect evidence	Truro, United KingdomHQ checked Sep 3, 2026	201-500	19 contacts →
	Indirect evidence “Wardell Armstrong is now part of SLR which is a leading global consultancy, accelerating our ability to deliver the net zero transition and helping our clients address critical…” Source: RevenueBase Database · checked Sep 3, 2026
24	Aqua-Tech	Indirect evidence	Edinburgh, United KingdomHQ checked Sep 3, 2026	11-50	19 contacts →
	Indirect evidence “At Aqua-Tech, we deliver pure expertise and exceptional outcomes in the water and utility sectors.” Source: RevenueBase Database · checked Sep 3, 2026
25	MCL Consulting	Partial evidence	Belfast, United KingdomHQ checked Sep 3, 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 3, 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: hydrogeological 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 hydrogeological consulting firms.
Partial evidence: Its own public description names part of hydrogeological consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name hydrogeological 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 406 hydrogeological consulting firms based in the United Kingdom

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Hydrogeological consulting firms based in the United Kingdom at a glance

As of Sep 3, 2026

37.9%Verified-email coverage

7.2%Mobile-number coverage

9.9Average contacts per company

1-10Median size (employees)

8.6%Largest-city concentration · London

Sep 3, 2026Page data refreshed

Companies by employee count

1-10

251

11-50

115

51-200

201-500

501-1,000

1,001-5,000

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

00–30

11431–60

89461–90

51690–180

4180+

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 hydrogeological 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 United Kingdom whose own description of what they do matches “hydrogeological 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 hydrogeological 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 hydrogeological consulting firms, 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, 1,528 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

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 hydrogeological 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 hydrogeological consulting firms are there based in the United Kingdom?

RevenueBase identified 406 hydrogeological consulting firms 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?

KBR Granherne, headquartered in Leatherhead, tops this list with the largest team on record.

Which city has the most hydrogeological consulting firms?

London leads with 35 headquartered companies, followed by Manchester (8) and Shrewsbury (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 1,528 verified decision-maker contacts tracked across these 406 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 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.