Company lists · Data refreshed September 2026

Top 25 Cooling water treatment companies based in the United Kingdom

Name: Cooling water treatment 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 19, 2026 146 companies tracked

RevenueBase identified 146 cooling water treatment companies headquartered in the United Kingdom as of September 2026 and tracks 2,116 professional contacts across them, including 1,065 with verified work emails. London is the largest hub.

This list covers cooling water treatment 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 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

146Companies

2,116Contacts tracked

1,065Verified emails

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The 25 largest cooling water treatment companies based in the United Kingdom

Ranked by team size

Top 25 of 146 cooling water treatment companies 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 cooling water treatment 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	RSE	Partial evidence	Inverness Highlands, United KingdomHQ checked Sep 19, 2026	501-1,000	498 contacts →
	Partial evidence “RSE is a trusted clean water technology company, developing market leading products and solutions for purifying drinking water, recycling wastewater and cleaning water in…” Source: RevenueBase Database · checked Sep 19, 2026
2	Culligan UK	Partial evidence	Dereham, United KingdomHQ checked Sep 19, 2026	501-1,000	231 contacts →
	Partial evidence “Culligan UK delivers innovative, high-quality water solutions to homes and businesses across the United Kingdom.” Source: RevenueBase Database · checked Sep 19, 2026
3	ADEY	Partial evidence	Stonehouse, United KingdomHQ checked Sep 19, 2026	201-500	129 contacts →
	Partial evidence “ADEY is working towards a future where every heating and cooling system is protected from corrosion; saving money, energy and time across the globe.” Source: RevenueBase Database · checked Sep 19, 2026
4	Salt Separation Services Limited	Strong evidence	Rochdale, United KingdomHQ checked Sep 19, 2026	51-200	80 contacts →
	Strong evidence “Salt Separation Services Limited is an independent water treatment company specialising in the design, manufacture, installation and commissioning of water treatment systems.” Source: RevenueBase Database · checked Sep 19, 2026
5	Feedwater Limited	Strong evidence	Moreton, United KingdomHQ checked Sep 19, 2026	51-200	79 contacts →
	Strong evidence “Feedwater Ltd is a UK Water Treatment Company, established in 1976 specifically to supply products and services for the treatment of water for steam boilers, cooling towers…” Source: RevenueBase Database · checked Sep 19, 2026
6	Envirogen Group	Strong evidence	Alfreton, United KingdomHQ checked Sep 19, 2026	201-500	75 contacts →
	Strong evidence “Envirogen Group is a global leader in industrial water treatment and process filtration solutions.” Source: RevenueBase Database · checked Sep 19, 2026
7	Siltbuster LTD	Strong evidence	Monmouth, United KingdomHQ checked Sep 19, 2026	51-200	75 contacts →
	Strong evidence “At Siltbuster Ltd, we operate the UK’s largest rental fleet of water treatment systems, setting the industry benchmark for rapid, reliable, and cost-effective solutions.” Source: RevenueBase Database · checked Sep 19, 2026
8	Advanced Water Technologies	Strong evidence	Warrington, United KingdomHQ checked Sep 19, 2026	51-200	52 contacts →
	Strong evidence “Welcome to Advanced Water Technologies: A dedicated water treatment & hygiene specialists focused on providing optimum solutions across a vast array of services, chemicals…” Source: RevenueBase Database · checked Sep 19, 2026
9	Water Treatment Products LTD	Strong evidence	Blaenavon, United KingdomHQ checked Sep 19, 2026	51-200	40 contacts →
	Strong evidence “Water Treatment Products Ltd, established in formulate and manufacture speciality chemicals for a wide range of water treatment companies and applications.” Source: RevenueBase Database · checked Sep 19, 2026
10	BWA Water Additives	Partial evidence	M32 0tb, United KingdomHQ checked Sep 19, 2026	51-200	38 contacts →
	Partial evidence “BWA is a technology-led specialty chemicals company who provides sustainable water management solutions to increase our customers’ competitive advantage.” Source: RevenueBase Database · checked Sep 19, 2026
11	Epsco LTD	Strong evidence	Perth, United KingdomHQ checked Sep 19, 2026	11-50	29 contacts →
	Strong evidence “EPSCO delivers the highest standards in water system cleanliness and performance, specialising in Offshore and Marine potable water, Industrial Cooling and Water Utilities.” Source: RevenueBase Database · checked Sep 19, 2026
12	Lubron UK	Strong evidence	Colchester, United KingdomHQ checked Sep 19, 2026	51-200	26 contacts →
	Strong evidence “Lubron Water Technology UK is part of the European Market leading water treatment provider, Lubron Group, which has subsidiaries in the Netherlands, Germany and Belgium.” Source: RevenueBase Database · checked Sep 19, 2026
13	Chem-Aqua Europe	Strong evidence	Wolverhampton, United KingdomHQ checked Sep 19, 2026	n/a	25 contacts →
	Strong evidence “Water treatment is an important part of preventative maintenance programmes for boiler, cooling and process water systems.” Source: RevenueBase Database · checked Sep 19, 2026
14	TWC Total Water Care	Strong evidence	Bicester, United KingdomHQ checked Sep 19, 2026	11-50	22 contacts →
	Strong evidence “Our core team have numerous years experience in the field of commercial water treatment and a proven track record of delivering effective, compliant water treatments packages.” Source: RevenueBase Database · checked Sep 19, 2026
15	Excel Water LTD	Strong evidence	Castleford, United KingdomHQ checked Sep 19, 2026	11-50	21 contacts →
	Strong evidence “At Excel Water, we pride ourselves on our unwavering commitment to delivering exceptional water treatment and purification solutions tailored to the diverse needs of our clients.” Source: RevenueBase Database · checked Sep 19, 2026
16	Dynamika	Strong evidence	Southampton, United KingdomHQ checked Sep 19, 2026	1-10	20 contacts →
	Strong evidence “Dynamika is an established water treatment and environmental consultancy which provide services to the industrial, commercial, leisure and healthcare sectors throughout the UK.” Source: RevenueBase Database · checked Sep 19, 2026
17	Comfort Services Group	Strong evidence	Colchester, United KingdomHQ checked Sep 19, 2026	11-50	14 contacts →
	Strong evidence “Comfort Services Group Ltd is a Water treatment, Water Hygiene, Validation and Commissioning of air and water systems company based in Essex serving London and the South East.” Source: RevenueBase Database · checked Sep 19, 2026
18	Hydropath Technology LTD	Indirect evidence	Nottingham, United KingdomHQ checked Sep 19, 2026	11-50	12 contacts →
	Indirect evidence “The development of HydroFLOW began in 1992, when Dr.” Source: RevenueBase Database · checked Sep 19, 2026
19	Barrett Industrial Cooling	Partial evidence	Newcastle-under-lyme, United KingdomHQ checked Sep 19, 2026	11-50	12 contacts →
	Partial evidence “Barrett Industrial Cooling provides specialist cooling tower services for industrial, commercial and critical infrastructure sites across the UK and worldwide.” Source: RevenueBase Database · checked Sep 19, 2026
20	Iwtm-Uk LTD	Strong evidence	Wallington, United KingdomHQ checked Sep 19, 2026	11-50	11 contacts →
	Strong evidence “IWTM-UK enjoy over 30 years experience as a market leading manufacturer of chemical-free solutions for the treatment, management and control of water for technical purposes.” Source: RevenueBase Database · checked Sep 19, 2026
21	Aquatech Environmental Services Limited	Strong evidence	Wolverhampton, United KingdomHQ checked Sep 19, 2026	11-50	11 contacts →
	Strong evidence “Industry Leader In Legionella Control & Water Treatment Water Treatment Services Aquatech water treatment services cover all stages of water treatment from pretreatment through to…” Source: RevenueBase Database · checked Sep 19, 2026
22	Therma-Chem	Indirect evidence	Glasgow, United KingdomHQ checked Sep 19, 2026	11-50	10 contacts →
	Indirect evidence “Therma-Chem specialise in the manufacture, production and application of unique, environmentally friendly, chemical technology products.” Source: RevenueBase Database · checked Sep 19, 2026
23	Chemical Treatment Services LTD	Strong evidence	Belfast, United KingdomHQ checked Sep 19, 2026	11-50	10 contacts →
	Strong evidence “Chemical Treatment Services Ltd are a Belfast based water treatment company offering competitively priced chemicals and equipment with a prompt and efficient service.” Source: RevenueBase Database · checked Sep 19, 2026
24	Water Tecnik LTD	Strong evidence	Newry, United KingdomHQ checked Sep 19, 2026	11-50	10 contacts →
	Strong evidence “Water Tecnik specialises in delivering practical, compliant, and cost-effective industrial wastewater and effluent treatment solutions.” Source: RevenueBase Database · checked Sep 19, 2026
25	Puretec Separations	Strong evidence	Ledbury, United KingdomHQ checked Sep 19, 2026	11-50	9 contacts →
	Strong evidence “PureTec Separations is a leader in technologies and customer experience within the water treatment and product processing industries.” 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: cooling water treatment 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 cooling water treatment companies.
Partial evidence: Its own public description names part of cooling water treatment companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cooling water treatment 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 146 cooling water treatment companies based in the United Kingdom

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Cooling water treatment companies based in the United Kingdom at a glance

As of Sep 19, 2026

50.3%Verified-email coverage

14.5Average contacts per company

1-10Median size (employees)

3.4%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

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 146 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 cooling water treatment 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 “cooling water treatment 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 cooling water treatment 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 cooling water treatment 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, 1,065 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.

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 cooling water treatment 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 cooling water treatment companies are there based in the United Kingdom?

RevenueBase identified 146 cooling water treatment 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?

RSE, headquartered in Inverness Highlands, tops this list with the largest team on record.

Which city has the most cooling water treatment companies?

London leads with 5 headquartered companies, followed by Bristol (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 1,065 verified decision-maker contacts tracked across these 146 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.