Company lists · Data refreshed September 2026

Top 25 Water treatment plants based in the United Kingdom

RevenueBase identified 111 company matches for water treatment plants associated with the United Kingdom as of September 2026 and tracks 2,323 professional contacts across them, including 980 with verified work emails. London is the largest hub.

This list covers company matches for water treatment plants 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 22, 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 22, 2026 How this list was built
111Companies
2,323Contacts tracked
980Verified emails
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The 25 largest water treatment plants based in the United Kingdom

Ranked by team size
Top 25 of 111 company matches for water treatment plants based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 22, 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 22, 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 22, 2026 · View company records in RevenueBase
2Exact matchSurrey, United KingdomHQ recorded Sep 22, 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 22, 2026 · View company records in RevenueBase
3Exact matchCoventry, United KingdomHQ recorded Sep 22, 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 22, 2026 · View company records in RevenueBase
4Exact matchUnited Kingdom & Ireland, United KingdomHQ recorded Sep 22, 2026201-50076 contacts →

Exact match

“At Nijhuis Saur Industries UK & Ireland our aim is to help our customers realise the value of their water and wastewater.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
5Exact matchAlfreton, United KingdomHQ recorded Sep 22, 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 22, 2026 · View company records in RevenueBase
6Exact matchMonmouth, United KingdomHQ recorded Sep 22, 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 22, 2026 · View company records in RevenueBase
7Exact matchStepps, United KingdomHQ recorded Sep 22, 2026201-50058 contacts →

Exact match

“How we manage water and wastewater systems now will be critical for our communities and ecosystems for many generations to come.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
8Exact matchHigh Wycombe, United KingdomHQ recorded Sep 22, 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 22, 2026 · View company records in RevenueBase
9Exact matchLondon, United KingdomHQ recorded Sep 22, 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 22, 2026 · View company records in RevenueBase
10Exact matchSelkirk, United KingdomHQ recorded Sep 22, 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 22, 2026 · View company records in RevenueBase
11Exact matchNorthamptonshire, United KingdomHQ recorded Sep 22, 202651-20033 contacts →

Exact match

“Marsh Industries delivers world-class water/wastewater treatment products and solutions to the domestic, commercial, agricultural and leisure sectors from its UK manufacturing…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
12Exact matchRuncorn, United KingdomHQ recorded Sep 22, 202611-5032 contacts →

Exact match

“Tertiary water treatment specialist.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
13Exact matchColchester, United KingdomHQ recorded Sep 22, 202651-20026 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
14Exact matchBicester, United KingdomHQ recorded Sep 22, 202611-5022 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
15Exact matchSkipton, United KingdomHQ recorded Sep 22, 202611-5022 contacts →

Exact match

“ACWA Services Limited is a Municipal and Industrial Water and Wastewater Treatment company located in Skipton, United Kingdom.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
16Exact matchCastleford, United KingdomHQ recorded Sep 22, 202611-5021 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
17Exact matchSouthampton, United KingdomHQ recorded Sep 22, 2026501-1,00016 contacts →

Exact match

“Te-Tech Process Solutions Ltd has been established to provide a dedicated service to existing and new clients in the municipal water, industrial and commercial sectors.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
18Exact matchAlderley Edge, United KingdomHQ recorded Sep 22, 202651-20015 contacts →

Exact match

“We specialise in water treatment and disinfection, operating in almost every industry where water treatment is required.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
19Exact matchAlton, United KingdomHQ recorded Sep 22, 202611-5013 contacts →

Exact match

“Plantwork Systems Ltd (PWS) provides water and wastewater treatment solutions with a strong focus on sustainability, innovation and cost efficiency.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
20Exact matchHigh Wycombe Bucks, United KingdomHQ recorded Sep 22, 20261-1012 contacts →

Exact match

“ESMIL Process Systems is an award winning Construction company located in United Kingdom.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
21Exact matchWellingborough, United KingdomHQ recorded Sep 22, 202611-5011 contacts →

Exact match

“ADEPT Pure Water Limited are specialists in the design, manufacture, commission, installation and Service of Water Purification and Treatment Plant and equipment.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
22Exact matchWolverhampton, United KingdomHQ recorded Sep 22, 202611-5011 contacts →

Exact match

“Industry Leader In Legionella Control & Water Treatment Water Treatment Services Aquatech water treatment services cover all stages of water treatment from pretreatment through to…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
23Exact matchHinckley, United KingdomHQ recorded Sep 22, 202611-5010 contacts →

Exact match

“Evergreen Water Solutions works closely with a number of international engineering companies whose expertise is in scalable wastewater treatment systems and containerised…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
24Exact matchNewry, United KingdomHQ recorded Sep 22, 202611-5010 contacts →

Exact match

“Water Tecnik specialises in delivering practical, compliant, and cost-effective industrial wastewater and effluent treatment solutions.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
25Exact matchLedbury, United KingdomHQ recorded Sep 22, 202611-509 contacts →

Exact match

“PureTec Separations is a leader in technologies and customer experience within the water treatment and product processing industries.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase

Showing 25 of 111 water treatment plants based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 980 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Water treatment plants based in the United Kingdom at a glance

As of Sep 22, 2026
42.2%Verified-email coverage
20.9Average contacts per company
11-50Median size (employees)
4.5%Largest-city concentration · London
Sep 22, 2026Page data refreshed

Companies by employee count

1-10
43
11-50
41
51-200
14
201-500
3
501-1,000
6
1,001-5,000
1
10001+
1

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 111 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 treatment plants” 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 980 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 22, 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 treatment plants”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many water treatment plants are there based in the United Kingdom?

RevenueBase identified 111 company matches for water treatment plants 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 treatment plants?

London leads with 5 company records, followed by Bristol (3) and Colchester (3).

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 980 professional contacts with verified work emails tracked across these 111 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 22, 2026.

Ready to reach these companies? Verified emails and direct dials for all 111 water treatment plants based in the United Kingdom. Start with a free account, no credit card.

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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.