Company lists · Data refreshed September 2026

Top 25 Hydrogeological survey companies based in the United Kingdom

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

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 212 companies tracked

RevenueBase identified 212 hydrogeological survey companies headquartered in the United Kingdom as of September 2026 and tracks 2,936 professional contacts across them, including 1,219 with verified work emails. London is the largest hub.

This list covers hydrogeological survey companies 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 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

212Companies

2,936Contacts tracked

1,219Verified emails

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The 25 largest hydrogeological survey companies based in the United Kingdom

Ranked by team size

Top 25 of 212 hydrogeological survey companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to hydrogeological survey companies: 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	Gardline Limited	Partial evidence	Great Yarmouth, United KingdomHQ checked Sep 20, 2026	501-1,000	545 contacts →
	Partial evidence “Gardline is a best-in-class provider of geophysical, geotechnical and environmental marine surveys.” Source: RevenueBase Database · checked Sep 20, 2026
2	Geotechnical Engineering Limited	Partial evidence	Gloucester, United KingdomHQ checked Sep 20, 2026	51-200	187 contacts →
	Partial evidence “Geotechnical is the leading independent provider of ground investigation in the UK, offering comprehensive intrusive surveys since 1961.” Source: RevenueBase Database · checked Sep 20, 2026
3	IGNE	Indirect evidence	Ross-on-wye, United KingdomHQ checked Sep 20, 2026	201-500	159 contacts →
	Indirect evidence “Igne is a leading UK specialist delivering integrated and stand-alone services across ground investigation, specialist drilling, UXO risk mitigation, materials testing…” Source: RevenueBase Database · checked Sep 20, 2026
4	Structural Soils	Indirect evidence	Bristol, United KingdomHQ checked Sep 20, 2026	201-500	137 contacts →
	Indirect evidence “Structural Soils offer comprehensive ground Investigation services to a range of clients in the public and private sector.” Source: RevenueBase Database · checked Sep 20, 2026
5	Dunelm Geotechnical & Environmental LTD	Indirect evidence	Durham, United KingdomHQ checked Sep 20, 2026	51-200	77 contacts →
	Indirect evidence “Dunelm has 50 years’ experience as leaders in the field of ground investigation, providing site investigation services on a national scale at competitive prices.” Source: RevenueBase Database · checked Sep 20, 2026
6	Zetica Limited	Partial evidence	Eynsham, United KingdomHQ checked Sep 20, 2026	51-200	75 contacts →
	Partial 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 20, 2026
7	EGS International	Partial evidence	Bordon, United KingdomHQ checked Sep 20, 2026	51-200	74 contacts →
	Partial evidence “EGS International Ltd (EGSi) is part of a leading international group of companies specialising in marine surveys.” Source: RevenueBase Database · checked Sep 20, 2026
8	Envirocentre	Indirect evidence	Glasgow, United KingdomHQ checked Sep 20, 2026	51-200	71 contacts →
	Indirect evidence “EnviroCentre is a solutions orientated consultancy that has a proven track record in providing innovative, effective and valuable advice.” Source: RevenueBase Database · checked Sep 20, 2026
9	WJ UK	Indirect evidence	Kings Langley, United KingdomHQ checked Sep 20, 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 20, 2026
10	Causeway Geotech LTD	Indirect evidence	Ballymoney, United KingdomHQ checked Sep 20, 2026	51-200	60 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 20, 2026
11	CC Ground Investigations Limited	Indirect evidence	Gloucester, United KingdomHQ checked Sep 20, 2026	51-200	60 contacts →
	Indirect evidence “CC Ground Investigations specialise in undertaking all types of geotechnical and environmental site investigation work throughout the U.K.” Source: RevenueBase Database · checked Sep 20, 2026
12	IAN Farmer Associates 1998 Limited	Indirect evidence	Washington, United KingdomHQ checked Sep 20, 2026	51-200	54 contacts →
	Indirect 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 20, 2026
13	Strata Geotechnics	Indirect evidence	Nottingham, United KingdomHQ checked Sep 20, 2026	501-1,000	41 contacts →
	Indirect evidence “Strata Geotechnics is one of the UK's leading ground investigation and geotechnical specialist contractors.” Source: RevenueBase Database · checked Sep 20, 2026
14	OIL Plus LTD	Indirect evidence	Newbury, United KingdomHQ checked Sep 20, 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 20, 2026
15	Harrison Group Environmental Limited	Indirect evidence	Norwich, United KingdomHQ checked Sep 20, 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 20, 2026
16	Storm Geomatics Limited	Indirect evidence	Shipston On Stour, United KingdomHQ checked Sep 20, 2026	11-50	31 contacts →
	Indirect evidence “Measurement experts who use innovation to understand river functions and provide knowledge to inform projects that reduce flooding and improve natural habitats.” Source: RevenueBase Database · checked Sep 20, 2026
17	MGS LTD	Indirect evidence	Bury St Edmunds, United KingdomHQ checked Sep 20, 2026	51-200	30 contacts →
	Indirect evidence “MGS manufactures and supplies specialist quality products for use in ground investigation, water well, and geothermal drilling applications, as well as a variety of railway…” Source: RevenueBase Database · checked Sep 20, 2026
18	Johnson Poole & Bloomer JPB	Indirect evidence	Brierley Hill, United KingdomHQ checked Sep 20, 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 20, 2026
19	Landscope Engineering	Partial evidence	Church Stretton, United KingdomHQ checked Sep 20, 2026	11-50	27 contacts →
	Partial evidence “Established in 2004, LandScope Engineering has become one of the leading survey companies in the UK specialising in integrated survey solutions above ground, below ground and…” Source: RevenueBase Database · checked Sep 20, 2026
20	Aspect Land & Hydrographic Surveys LTD	Partial evidence	Irvine, United KingdomHQ checked Sep 20, 2026	11-50	27 contacts →
	Partial evidence “Aspect Land & Hydrographic Surveys Ltd are one of the UK’s leading independent coastal survey companies, with extensive experience and a proven track record in providing…” Source: RevenueBase Database · checked Sep 20, 2026
21	Highwater	Indirect evidence	Nairn, United KingdomHQ checked Sep 20, 2026	51-200	22 contacts →
	Indirect evidence “Specialists in Private Water Supplies.” Source: RevenueBase Database · checked Sep 20, 2026
22	Envireau Water	Indirect evidence	Melbourne, United KingdomHQ checked Sep 20, 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 20, 2026
23	Terradat UK LTD	Indirect evidence	Cardiff, United KingdomHQ checked Sep 20, 2026	11-50	21 contacts →
	Indirect evidence “Complex Geophysics delivered by Down to Earth people: 33 years' experience working with engineers & consultants delivering honest, reliable and objective subsurface mapping…” Source: RevenueBase Database · checked Sep 20, 2026
24	Drilcorp	Indirect evidence	Seaham, United KingdomHQ checked Sep 20, 2026	11-50	21 contacts →
	Indirect evidence “Drilcorp was established in 1992 and since then has developed into one of the UK’s top drilling companies.” Source: RevenueBase Database · checked Sep 20, 2026
25	GIP LTD	Indirect evidence	The Pensnett Estate, United KingdomHQ checked Sep 20, 2026	11-50	20 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 20, 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 survey companies. 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 survey companies.
Partial evidence: Its own public description names part of hydrogeological survey companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name hydrogeological survey companies. 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 212 hydrogeological survey companies based in the United Kingdom

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Hydrogeological survey companies based in the United Kingdom at a glance

As of Sep 20, 2026

41.5%Verified-email coverage

13.8Average contacts per company

1-10Median size (employees)

3.3%Largest-city concentration · London

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

120

11-50

51-200

201-500

501-1,000

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 212 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 hydrogeological survey companies, 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 survey companies”. 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 survey companies), 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 survey companies, 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, 1,219 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 hydrogeological survey companies, 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 survey companies are there based in the United Kingdom?

RevenueBase identified 212 hydrogeological survey companies 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?

Gardline Limited, headquartered in Great Yarmouth, tops this list with the largest team on record.

Which city has the most hydrogeological survey companies?

London leads with 7 headquartered companies, followed by Durham (4) and Nottingham (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 1,219 verified decision-maker contacts tracked across these 212 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.