Company lists · Data refreshed September 2026

Top 25 Water resources engineering firms based in the United Kingdom

Name: Water resources engineering 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 19, 2026 528 companies tracked

RevenueBase identified 528 water resources engineering firms headquartered in the United Kingdom as of September 2026 and tracks 18,267 professional contacts across them, including 6,216 with verified work emails. London is the largest hub.

This list covers water resources engineering 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 19, 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 19, 2026 86% judged on-target in blind review

528Companies

18,267Contacts tracked

6,216Verified emails

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The 25 largest water resources engineering firms based in the United Kingdom

Ranked by team size

Top 25 of 528 water resources engineering firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to water resources engineering 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	RPS	Partial evidence	Abingdon, United KingdomHQ checked Sep 19, 2026	5,001-10,000	4,684 contacts →
	Partial evidence “Founded in 1970, RPS is part of Tetra Tech, a leading global provider of consulting and engineering services.” Source: RevenueBase Database · checked Sep 19, 2026
2	RSK Group	Partial evidence	Helsby, United KingdomHQ checked Sep 19, 2026	10001+	1,255 contacts →
	Partial evidence “RSK Group is a global leader in the delivery of environmental and engineering solutions.” Source: RevenueBase Database · checked Sep 19, 2026
3	Binnies	Partial evidence	Redhill, United KingdomHQ checked Sep 19, 2026	501-1,000	842 contacts →
	Partial evidence “Together with our strategic partners, we can address everything from supporting vulnerable customers, water quality, asset performance and leak detection, to integrated planning…” Source: RevenueBase Database · checked Sep 19, 2026
4	Ricardo PLC	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	1,001-5,000	670 contacts →
	Indirect evidence “Click the 'Follow' button and explore careers at Ricardo on our 'Jobs' and 'Life' tabs and at careers.ricardo.com.” Source: RevenueBase Database · checked Sep 19, 2026
5	Waterman Group	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	1,001-5,000	563 contacts →
	Partial evidence “Waterman Group is a multidisciplinary consultancy providing sustainable solutions to meet the planning, engineering design and project delivery needs of the property…” Source: RevenueBase Database · checked Sep 19, 2026
6	Fairhurst	Indirect evidence	Glasgow, United KingdomHQ checked Sep 19, 2026	201-500	437 contacts →
	Indirect evidence “Welcome to Fairhurst: Fairhurst is a Limited Liability Partnership (LLP) of Consulting Engineers practicing in the UK, employing circa 400 staff in 16 principal offices.” Source: RevenueBase Database · checked Sep 19, 2026
7	WRC Group	Partial evidence	Swindon, United KingdomHQ checked Sep 19, 2026	201-500	226 contacts →
	Partial evidence “Water Research Centre (WRc) is a trusted provider of consultancy, technical services, accreditation schemes, research, innovation and training to customers around the globe.” Source: RevenueBase Database · checked Sep 19, 2026
8	The Erith Group	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	501-1,000	217 contacts →
	Indirect evidence “Supported by a network of specialist consulting engineers, environmentalists and our own collective experience, our philosophy is simple: to provide a qualitative economic and…” Source: RevenueBase Database · checked Sep 19, 2026
9	JURU	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	176 contacts →
	Partial evidence “Founded in 2015, Juru is an international engineering and consultancy firm with a mission to solve engineering and environmental problems.” Source: RevenueBase Database · checked Sep 19, 2026
10	Hydro International	Partial evidence	Clevedon, United KingdomHQ checked Sep 19, 2026	201-500	166 contacts →
	Partial evidence “Hydro International, a CRH Company, provides advanced products, services and expertise to help municipal, industrial and construction customers to improve their water management…” Source: RevenueBase Database · checked Sep 19, 2026
11	JNP Group	Indirect evidence	Amersham, United KingdomHQ checked Sep 19, 2026	51-200	166 contacts →
	Indirect evidence “With over 40 years experience JNP Group deliver highly professional, integrated efficient design and consultancy solutions from inception to completion, irrespective of project…” Source: RevenueBase Database · checked Sep 19, 2026
12	Arthian LTD	Indirect evidence	Glasgow, United KingdomHQ checked Sep 19, 2026	201-500	153 contacts →
	Indirect evidence “Arthian has been established following a merger between Mabbett and IKM Consulting.” Source: RevenueBase Database · checked Sep 19, 2026
13	Mackley	Indirect evidence	Small Dole, United KingdomHQ checked Sep 19, 2026	51-200	116 contacts →
	Indirect evidence “Mackley provides a comprehensive range of services from conception through construction to project delivery.” Source: RevenueBase Database · checked Sep 19, 2026
14	Campbellreith	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	113 contacts →
	Indirect evidence “CampbellReith is an independent firm of consulting engineers providing structural, civil, geotechnical, land quality, development planning and transport planning services.” Source: RevenueBase Database · checked Sep 19, 2026
15	Land Water	Partial evidence	Guildford, United KingdomHQ checked Sep 19, 2026	201-500	109 contacts →
	Partial evidence “Land + Water is more than just a dredging company.” Source: RevenueBase Database · checked Sep 19, 2026
16	Mrag LTD	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	103 contacts →
	Partial 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 19, 2026
17	Isle Utilities	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	101 contacts →
	Partial evidence “Isle’s vision is to be the leading catalyst in water industry transformation through exceptional business insight, technology, and innovative solutions.” Source: RevenueBase Database · checked Sep 19, 2026
18	Ardent Consulting Engineers	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	96 contacts →
	Partial evidence “Founded in 2005, Ardent Consulting Engineers provide transport and infrastructure planning and engineering advice to the property and land development industry.” Source: RevenueBase Database · checked Sep 19, 2026
19	Crouch Waterfall & Partners LTD	Indirect evidence	Bradley Stoke, United KingdomHQ checked Sep 19, 2026	51-200	96 contacts →
	Indirect evidence “Crouch Waterfall is an established firm of Civil, Structural and Geotechnical Consulting Engineers with extensive experience of Railways, Buildings, Roads, Bridges and Waterways.” Source: RevenueBase Database · checked Sep 19, 2026
20	Doran Consulting	Partial evidence	Belfast, United KingdomHQ checked Sep 19, 2026	51-200	93 contacts →
	Partial evidence “Founded in 1953, Doran Consulting offers a wealth of expertise and experience in the creation of economic, innovative and sustainable engineering solutions.” Source: RevenueBase Database · checked Sep 19, 2026
21	Crowder Consulting	Strong evidence	Birkenhead, United KingdomHQ checked Sep 19, 2026	51-200	90 contacts →
	Strong evidence “Crowder Consulting provides innovative engineering consultancy services and software solutions to the water industry, specialising in water supply, water distribution and sewer…” Source: RevenueBase Database · checked Sep 19, 2026
22	Simpson TWS	Partial evidence	Henley On Thames, United KingdomHQ checked Sep 19, 2026	51-200	89 contacts →
	Partial evidence “Simpson TWS is a successful civil and structural engineering consultancy.” Source: RevenueBase Database · checked Sep 19, 2026
23	Richter	Partial evidence	Marlow, United KingdomHQ checked Sep 19, 2026	51-200	85 contacts →
	Partial evidence “Engineering Value Together - from incubation, to project realisation.” Source: RevenueBase Database · checked Sep 19, 2026
24	Niras UK	Partial evidence	Ascot, United KingdomHQ checked Sep 19, 2026	201-500	79 contacts →
	Partial evidence “NIRAS in the United Kingdom combines engineering, consultancy and project management expertise across process industries, marine environments, marine structures and international…” Source: RevenueBase Database · checked Sep 19, 2026
25	Rappor	Partial evidence	Cheltenham, United KingdomHQ checked Sep 19, 2026	51-200	75 contacts →
	Partial evidence “Rappor is an engineering and environmental consultancy working in partnership to steer sustainable development.” Source: RevenueBase Database · checked Sep 19, 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 engineering 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 engineering firms.
Partial evidence: Its own public description names part of water resources engineering 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 engineering 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 528 water resources engineering firms based in the United Kingdom

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Water resources engineering firms based in the United Kingdom at a glance

As of Sep 19, 2026

34.0%Verified-email coverage

34.6Average contacts per company

1-10Median size (employees)

8.7%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

298

11-50

155

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 528 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 engineering 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 “water resources engineering 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 engineering 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 engineering 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, 6,216 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 19, 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.

Water resources engineering firms by metro

Water resources engineering firms in London46

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 engineering 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 engineering firms are there based in the United Kingdom?

RevenueBase identified 528 water resources engineering 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?

RPS, headquartered in Abingdon, tops this list with the largest team on record.

Which city has the most water resources engineering firms?

London leads with 46 headquartered companies, followed by Bristol (10) and Glasgow (9).

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 6,216 verified decision-maker contacts tracked across these 528 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 19, 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.