Company lists · Data refreshed September 2026
Top 25 Hydrogeological consulting firms based in the United Kingdom
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, 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.
The 25 largest hydrogeological consulting firms based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 656 | ||||
“KBR Consulting is one of the world's foremost engineering consultancies specializing in the hydrocarbon and energy industry.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 2 | 162 | ||||
“We're not just service providers; we're your long-term partners in creating a sustainable, compliant, and efficient future for your assets.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 3 | 100 | ||||
“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: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 4 | 86 | ||||
“CGL is a leading specialist geotechnical consultancy and has a reputation for solving difficult technical problems with value engineering in construction projects.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 5 | Zetica LimitedIndirect evidence | 75 | |||
“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: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 6 | 73 | ||||
“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: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 7 | WJ UKIndirect evidence | 64 | |||
“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: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 8 | 61 | ||||
“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: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 9 | 59 | ||||
“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: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 10 | 54 | ||||
“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: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 11 | OIL Plus LTDIndirect evidence | 36 | |||
“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: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 12 | 34 | ||||
“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: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 13 | QEM SolutionsIndirect evidence | 32 | |||
“We are QEM Solutions.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 14 | 32 | ||||
“Harrison Group Environmental is one of the UK’s leading geotechnical and geoenvironmental engineering firms.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 15 | 24 | ||||
“Geo-Environmental is an independent practice of geotechnical engineers, environmental consultants, and investigation contractors, who have been established since 1996.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 16 | 24 | ||||
“Gavia Environmental Ltd is a specialist environmental consultancy based in Perthshire, Scotland, providing ecological and hydrological services.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 17 | 23 | ||||
“A F Howland Associates was formed in 1981 to provide an independent practice offering a specialist service in geotechnical engineering and related disciplines.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 18 | 23 | ||||
“We are an independent UK based company led by staff that have been providing advice to clients over the past thirty years.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 19 | 23 | ||||
“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: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 20 | 22 | ||||
“Specialists in Private Water Supplies.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 21 | 21 | ||||
“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: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 22 | Ternan EnergyIndirect evidence | 19 | |||
“We are experts in marine geotechnics, geophysics, engineering geology and foundation engineering.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 23 | Wardell Armstrong International Part Of SLRIndirect evidence | 19 | |||
“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: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 24 | 19 | ||||
“At Aqua-Tech, we deliver pure expertise and exceptional outcomes in the water and utility sectors.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 25 | MCL ConsultingPartial evidence | 18 | |||
“Office Locations Belfast Based Consultancy Firm About Us MCL Consulting always operate as a team.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
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, 2026Companies by employee count
Verified emails by last verification
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 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 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.
- 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 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, 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.
Hydrogeological consulting firms by metro
- Hydrogeological consulting firms in London35
Frequently asked
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 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.
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