Company lists · Data refreshed September 2026

Top 25 Water management consulting firms based in the United Kingdom

Name: Water management 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 21, 2026 389 companies tracked

RevenueBase identified 389 water management consulting firms headquartered in the United Kingdom as of September 2026 and tracks 12,714 professional contacts across them, including 4,546 with verified work emails. London is the largest hub.

This list covers water management 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 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

389Companies

12,714Contacts tracked

4,546Verified emails

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The 25 largest water management consulting firms based in the United Kingdom

Ranked by team size

Top 25 of 389 water management consulting firms 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 water management 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	Pentair	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	5,001-10,000	6,636 contacts →
	Partial evidence “At Pentair, we help the world sustainably move, improve, and enjoy water, life’s most essential resource.” Source: RevenueBase Database · checked Sep 21, 2026
2	Binnies	Partial evidence	Redhill, United KingdomHQ checked Sep 21, 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 21, 2026
3	Biwater	Partial evidence	Surrey, United KingdomHQ checked Sep 21, 2026	501-1,000	178 contacts →
	Partial evidence “Biwater is a world leader in treated water, providing large-scale water and wastewater solutions for clients across the world.” Source: RevenueBase Database · checked Sep 21, 2026
4	Hydro International	Strong evidence	Clevedon, United KingdomHQ checked Sep 21, 2026	201-500	166 contacts →
	Strong 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 21, 2026
5	Severn Trent Services	Indirect evidence	Coventry, United KingdomHQ checked Sep 21, 2026	1,001-5,000	137 contacts →
	Indirect evidence “Severn Trent Services offer a range of services to municipal and industrial clients, including the Ministry of Defence and the Coal Authority, for design, build and operation of…” Source: RevenueBase Database · checked Sep 21, 2026
6	Enpure	Partial evidence	Birmingham, United KingdomHQ checked Sep 21, 2026	51-200	113 contacts →
	Partial evidence “Enpure is a process engineering company specializing in water, wastewater and sludge treatment as well as waste-to-energy solutions with a global presence.” Source: RevenueBase Database · checked Sep 21, 2026
7	Alumasc Water Management Solutions	Strong evidence	Kettering, United KingdomHQ checked Sep 21, 2026	51-200	112 contacts →
	Strong evidence “AWMS, part of Alumasc Group, is the first joined-up brand in integrated water management.” Source: RevenueBase Database · checked Sep 21, 2026
8	Land Water	Partial evidence	Guildford, United KingdomHQ checked Sep 21, 2026	201-500	109 contacts →
	Partial evidence “Land + Water is more than just a dredging company.” Source: RevenueBase Database · checked Sep 21, 2026
9	Mrag LTD	Partial evidence	London, United KingdomHQ checked Sep 21, 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 21, 2026
10	Isle Utilities	Partial evidence	London, United KingdomHQ checked Sep 21, 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 21, 2026
11	Crowder Consulting	Strong evidence	Birkenhead, United KingdomHQ checked Sep 21, 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 21, 2026
12	Nijhuis Saur Industries UK And Ireland	Partial evidence	United Kingdom & Ireland, United KingdomHQ checked Sep 21, 2026	201-500	76 contacts →
	Partial evidence “At Nijhuis Saur Industries UK & Ireland our aim is to help our customers realise the value of their water and wastewater.” Source: RevenueBase Database · checked Sep 21, 2026
13	Envirogen Group	Partial evidence	Alfreton, United KingdomHQ checked Sep 21, 2026	201-500	75 contacts →
	Partial evidence “Envirogen Group is a global leader in industrial water treatment and process filtration solutions.” Source: RevenueBase Database · checked Sep 21, 2026
14	Waterscan	Strong evidence	Chichester, United KingdomHQ checked Sep 21, 2026	51-200	73 contacts →
	Strong evidence “Waterscan is an industry-leading sustainable water management company.” Source: RevenueBase Database · checked Sep 21, 2026
15	ACO Water Management UK & Ireland	Strong evidence	Shefford, United KingdomHQ checked Sep 21, 2026	201-500	70 contacts →
	Strong evidence “Throughout the world ACO branded drainage and surface water management systems are recognised for their innovative design, high quality manufacture, environmental excellence and…” Source: RevenueBase Database · checked Sep 21, 2026
16	WJ UK	Partial evidence	Kings Langley, United KingdomHQ checked Sep 21, 2026	51-200	65 contacts →
	Partial 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
17	Waterco Datrys	Partial evidence	Ruthin, United KingdomHQ checked Sep 21, 2026	11-50	59 contacts →
	Partial 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
18	ESD Joint Venture	Partial evidence	Stepps, United KingdomHQ checked Sep 21, 2026	201-500	58 contacts →
	Partial evidence “How we manage water and wastewater systems now will be critical for our communities and ecosystems for many generations to come.” Source: RevenueBase Database · checked Sep 21, 2026
19	Water2business	Strong evidence	Bristol, United KingdomHQ checked Sep 21, 2026	51-200	51 contacts →
	Strong evidence “water2business is a leading retailer of water and waste water management solutions to businesses and organisations across England and Scotland.” Source: RevenueBase Database · checked Sep 21, 2026
20	PH Water Part Of Complii	Partial evidence	Farnborough, United KingdomHQ checked Sep 21, 2026	51-200	50 contacts →
	Partial evidence “ph Water technologies are one of the leading ‘Total Environment Solutions Companies' operating within the UK.” Source: RevenueBase Database · checked Sep 21, 2026
21	Graf UK LTD	Strong evidence	Banbury, United KingdomHQ checked Sep 21, 2026	51-200	43 contacts →
	Strong evidence “Graf UK Ltd was formed following the acquisition of SCP Water Management Ltd by Graf GmbH, the European market leaders in rainwater harvesting.” Source: RevenueBase Database · checked Sep 21, 2026
22	Veriflo Limited	Strong evidence	East Malling, United KingdomHQ checked Sep 21, 2026	11-50	39 contacts →
	Strong evidence “Veriflo Ltd - a professional strategic project management company, specialising in clean water asset services.” Source: RevenueBase Database · checked Sep 21, 2026
23	Cbec Eco-Engineering UK & Europe	Indirect evidence	Inverness, United KingdomHQ checked Sep 21, 2026	11-50	36 contacts →
	Indirect evidence “CBEC eco-engineering is a leading UK environmental consultant specialising in the provision of eco-engineering solutions for the aquatic environment.” Source: RevenueBase Database · checked Sep 21, 2026
24	OIL Plus LTD	Strong evidence	Newbury, United KingdomHQ checked Sep 21, 2026	11-50	36 contacts →
	Strong 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
25	Panton Mcleod	Partial evidence	Selkirk, United KingdomHQ checked Sep 21, 2026	11-50	35 contacts →
	Partial evidence “Our teams are dedicated to supporting our clients to protect, maintain and improve water quality within treatment and distribution systems.” 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: water management 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 water management consulting firms.
Partial evidence: Its own public description names part of water management consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name water management 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 389 water management consulting firms based in the United Kingdom

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Water management consulting firms based in the United Kingdom at a glance

As of Sep 21, 2026

35.8%Verified-email coverage

32.7Average contacts per company

1-10Median size (employees)

7.7%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

219

11-50

108

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 389 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 management 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 “water management 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 water management 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 water management 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, 4,546 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.

Water management consulting firms by metro

Water management consulting firms in London30

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 management 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 water management consulting firms are there based in the United Kingdom?

RevenueBase identified 389 water management 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?

Pentair, headquartered in London, tops this list with the largest team on record.

Which city has the most water management consulting firms?

London leads with 30 headquartered companies, followed by Manchester (8) and Wallingford (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 4,546 verified decision-maker contacts tracked across these 389 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.