Company lists · Data refreshed September 2026

Top 25 Water purification companies based in the United Kingdom

RevenueBase identified 413 company matches for water purification companies associated with the United Kingdom as of September 2026 and tracks 5,268 professional contacts across them, including 2,047 with verified work emails. London is the largest hub.

This list covers company matches for water purification companies associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 19, 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 19, 2026 How this list was built
413Companies
5,268Contacts tracked
2,047Verified emails
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The 25 largest water purification companies based in the United Kingdom

Ranked by team size
Top 25 of 413 company matches for water purification companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchInverness Highlands, United KingdomHQ recorded Sep 19, 2026501-1,000498 contacts →

Exact match

“RSE is a trusted clean water technology company, developing market leading products and solutions for purifying drinking water, recycling wastewater and cleaning water in…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
2Exact matchDereham, United KingdomHQ recorded Sep 19, 2026501-1,000231 contacts →

Exact match

“Culligan UK delivers innovative, high-quality water solutions to homes and businesses across the United Kingdom.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Sep 19, 2026201-500179 contacts →

Exact match

“With unrivalled expertise in filtered boiling, chilled and sparkling water, Zip Water is known globally for being home to the world’s most advanced range of drinking water…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4Exact matchSurrey, United KingdomHQ recorded Sep 19, 2026501-1,000178 contacts →

Exact match

“Biwater is a world leader in treated water, providing large-scale water and wastewater solutions for clients across the world.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
5Exact matchCoventry, United KingdomHQ recorded Sep 19, 20261,001-5,000137 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
6Exact matchBirmingham, United KingdomHQ recorded Sep 19, 202651-200113 contacts →

Exact match

“Enpure is a process engineering company specializing in water, wastewater and sludge treatment as well as waste-to-energy solutions with a global presence.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7Exact matchRochdale, United KingdomHQ recorded Sep 19, 202651-20080 contacts →

Exact match

“Salt Separation Services Limited is an independent water treatment company specialising in the design, manufacture, installation and commissioning of water treatment systems.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8Exact matchMoreton, United KingdomHQ recorded Sep 19, 202651-20079 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9Exact matchAlfreton, United KingdomHQ recorded Sep 19, 2026201-50075 contacts →

Exact match

“Envirogen Group is a global leader in industrial water treatment and process filtration solutions.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10Exact matchMonmouth, United KingdomHQ recorded Sep 19, 202651-20075 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11Exact matchDewsbury, United KingdomHQ recorded Sep 19, 202651-20074 contacts →

Exact match

“Established in 1970, the West Yorkshire-based Richard Alan Group is a portfolio of businesses providing high-quality Engineering Design, Manufacture, Installation and Servicing to…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12Exact matchKettering, United KingdomHQ recorded Sep 19, 202651-20057 contacts →

Exact match

“Independent Water Treatment & Water/Air Hygiene company with National coverage.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13Exact matchMaidstone, United KingdomHQ recorded Sep 19, 202651-20053 contacts →

Exact match

“In short, we’re 'easy to deal with'.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14Exact matchWarrington, United KingdomHQ recorded Sep 19, 202651-20052 contacts →

Exact match

“Welcome to Advanced Water Technologies: A dedicated water treatment & hygiene specialists focused on providing optimum solutions across a vast array of services, chemicals…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15Exact matchBasildon, United KingdomHQ recorded Sep 19, 202651-20050 contacts →

Exact match

“Guardian part of Marlowe Environmental Services, delivers a range of water treatment and air quality services, allowing the systems that rely on these elements to work effectively…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16Exact matchHigh Wycombe, United KingdomHQ recorded Sep 19, 202651-20050 contacts →

Exact match

“Hydrotec is the UK’s leading company in the design and manufacture of water treatment products for the building services industry.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17Exact matchCombe, United KingdomHQ recorded Sep 19, 2026n/a50 contacts →

Exact match

“We are all acutely aware how unsustainable bottled water is and what a negative impact it has on our environment.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18Exact matchWoore, United KingdomHQ recorded Sep 19, 202651-20049 contacts →

Exact match

“Established in 1959, T-T started out as a general engineering company before growing to consist of 6 divisions – T-T Pumps, T-T Controls and Automation, T-T Flow Valves, T-T…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19Exact matchMaidstone, United KingdomHQ recorded Sep 19, 202611-5044 contacts →

Exact match

“ATAC Solutions Ltd is a leading UK environmental services company specialising in wastewater services and wastewater equipment on a capital purchase or hire basis.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20Exact matchWolverhampton, United KingdomHQ recorded Sep 19, 202651-20040 contacts →

Exact match

“At Billi, we design and manufacture a range of energy efficient filtered water systems that offer our customers the very best in innovation, superior performance and reliability.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21Exact matchLondon, United KingdomHQ recorded Sep 19, 202651-20040 contacts →

Exact match

“Hydro Industries.generating clean water Clean Water is a limited natural resource essential for life and economic growth.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22Exact matchBlaenavon, United KingdomHQ recorded Sep 19, 202651-20040 contacts →

Exact match

“Water Treatment Products Ltd, established in formulate and manufacture speciality chemicals for a wide range of water treatment companies and applications.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23Exact matchChesterfield, United KingdomHQ recorded Sep 19, 202651-20036 contacts →

Exact match

“Swimming Pool Filtration and Water Treatment Specialist Sterling Hydrotech are part of WCS Environmental Engineering, registered in England and Wales (02275897) at 20 Grosvenor…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24Exact matchBethesda, United KingdomHQ recorded Sep 19, 202611-5036 contacts →

Exact match

“Elentec develops and supplies electrochemical water treatment systems - together with appropriate separation technology.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25Exact matchSelkirk, United KingdomHQ recorded Sep 19, 202611-5035 contacts →

Exact match

“Our teams are dedicated to supporting our clients to protect, maintain and improve water quality within treatment and distribution systems.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase

Showing 25 of 413 water purification companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 2,047 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Water purification companies based in the United Kingdom at a glance

As of Sep 19, 2026
38.9%Verified-email coverage
12.8Average contacts per company
11-50Median size (employees)
5.8%Largest-city concentration · London
Sep 19, 2026Page data refreshed

Companies by employee count

1-10
200
11-50
143
51-200
43
201-500
8
501-1,000
8
1,001-5,000
2
10001+
2

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 413 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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
Company records associated with the United Kingdom whose business descriptions match “water purification companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 2,047 professional contacts with verified work emails across the full matched dataset. 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.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “water purification companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many water purification companies are there based in the United Kingdom?

RevenueBase identified 413 company matches for water purification companies associated with the United Kingdom as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

RSE tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most water purification companies?

London leads with 24 company records, followed by Birmingham (6) and Bristol (5).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 2,047 professional contacts with verified work emails tracked across these 413 companies; direct dials are available where recorded.

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 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.