Company lists · Data refreshed September 2026

Top 25 Food processing water treatment based in the United Kingdom

Name: Food processing water treatment based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 261 companies tracked

RevenueBase identified 261 food processing water treatment headquartered in the United Kingdom as of September 2026 and tracks 4,155 professional contacts across them, including 1,665 with verified work emails. London is the largest hub.

This list covers food processing water treatment 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 20, 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 20, 2026 86% judged on-target in blind review

261Companies

4,155Contacts tracked

1,665Verified emails

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The 25 largest food processing water treatment based in the United Kingdom

Ranked by team size

Top 25 of 261 food processing water treatment based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to food processing water treatment: 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 20, 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 20, 2026
2	Culligan UK	Partial evidence	Dereham, United KingdomHQ checked Sep 20, 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 20, 2026
3	Biwater	Partial evidence	Surrey, United KingdomHQ checked Sep 20, 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 20, 2026
4	Severn Trent Services	Indirect evidence	Coventry, United KingdomHQ checked Sep 20, 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 20, 2026
5	HBE	Indirect evidence	Newry, United KingdomHQ checked Sep 20, 2026	51-200	87 contacts →
	Indirect evidence “HBE is a well respected provider of compliance services on local basis, assisting building & facilities managers in providing a safe and healthy built environment for employees…” Source: RevenueBase Database · checked Sep 20, 2026
6	Salt Separation Services Limited	Strong evidence	Rochdale, United KingdomHQ checked Sep 20, 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 20, 2026
7	Nijhuis Saur Industries UK And Ireland	Partial evidence	United Kingdom & Ireland, United KingdomHQ checked Sep 20, 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 20, 2026
8	Envirogen Group	Strong evidence	Alfreton, United KingdomHQ checked Sep 20, 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 20, 2026
9	Siltbuster LTD	Strong evidence	Monmouth, United KingdomHQ checked Sep 20, 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 20, 2026
10	Jacopa Limited	Indirect evidence	West Bromwich, United KingdomHQ checked Sep 20, 2026	51-200	73 contacts →
	Indirect evidence “Many of the best known, most respected and reliable brand names in the wastewater industry are part of Jacopa's heritage.” Source: RevenueBase Database · checked Sep 20, 2026
11	Sayvol Environmental And Building Services Limited	Strong evidence	Kettering, United KingdomHQ checked Sep 20, 2026	51-200	57 contacts →
	Strong evidence “Independent Water Treatment & Water/Air Hygiene company with National coverage.” Source: RevenueBase Database · checked Sep 20, 2026
12	Fileder Filter Systems	Indirect evidence	Maidstone, United KingdomHQ checked Sep 20, 2026	51-200	53 contacts →
	Indirect evidence “In short, we’re 'easy to deal with'.” Source: RevenueBase Database · checked Sep 20, 2026
13	Advanced Water Technologies	Strong evidence	Warrington, United KingdomHQ checked Sep 20, 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 20, 2026
14	Guardian Water Treatment Marlowe Environmental Services	Strong evidence	Basildon, United KingdomHQ checked Sep 20, 2026	51-200	50 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 20, 2026
15	PH Water Part Of Complii	Partial evidence	Farnborough, United KingdomHQ checked Sep 20, 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 20, 2026
16	Hydrotec Water Treatment Specialists	Strong evidence	High Wycombe, United KingdomHQ checked Sep 20, 2026	51-200	50 contacts →
	Strong evidence “Hydrotec is the UK’s leading company in the design and manufacture of water treatment products for the building services industry.” Source: RevenueBase Database · checked Sep 20, 2026
17	Billi UK	Partial evidence	Wolverhampton, United KingdomHQ checked Sep 20, 2026	51-200	40 contacts →
	Partial evidence “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.” Source: RevenueBase Database · checked Sep 20, 2026
18	Hydro Industries Limited	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	40 contacts →
	Partial evidence “Hydro Industries.generating clean water Clean Water is a limited natural resource essential for life and economic growth.” Source: RevenueBase Database · checked Sep 20, 2026
19	Panton Mcleod	Strong evidence	Selkirk, United KingdomHQ checked Sep 20, 2026	11-50	35 contacts →
	Strong 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 20, 2026
20	Marsh Industries LTD	Strong evidence	Northamptonshire, United KingdomHQ checked Sep 20, 2026	51-200	33 contacts →
	Strong evidence “Marsh Industries delivers world-class water/wastewater treatment products and solutions to the domestic, commercial, agricultural and leisure sectors from its UK manufacturing…” Source: RevenueBase Database · checked Sep 20, 2026
21	Arvia Technology	Strong evidence	Runcorn, United KingdomHQ checked Sep 20, 2026	11-50	32 contacts →
	Strong evidence “Tertiary water treatment specialist.” Source: RevenueBase Database · checked Sep 20, 2026
22	Reigate Environmental Services Limited	Strong evidence	Redhill, United KingdomHQ checked Sep 20, 2026	11-50	31 contacts →
	Strong evidence “Reigate Environmental Services Limited is a Water Treatment and Maintenance company based at 42 Ormside Way, Holmethorpe Industrial Estate, Redhill, Surrey, United Kingdom.” Source: RevenueBase Database · checked Sep 20, 2026
23	GES Water	Indirect evidence	Aylesbury, United KingdomHQ checked Sep 20, 2026	11-50	30 contacts →
	Indirect evidence “Since 1990 we have provided our clients with leading edge solutions to legionella management.” Source: RevenueBase Database · checked Sep 20, 2026
24	Aqua Technologies Europe Limited	Partial evidence	Hounslow, United KingdomHQ checked Sep 20, 2026	11-50	28 contacts →
	Partial evidence “At Aqua Technologies, we deliver customized water management solutions to meet your business needs.” Source: RevenueBase Database · checked Sep 20, 2026
25	Lubron UK	Strong evidence	Colchester, United KingdomHQ checked Sep 20, 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 20, 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: food processing water treatment. 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 food processing water treatment.
Partial evidence: Its own public description names part of food processing water treatment, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name food processing water treatment. 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 261 food processing water treatment based in the United Kingdom

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Food processing water treatment based in the United Kingdom at a glance

As of Sep 20, 2026

40.1%Verified-email coverage

15.9Average contacts per company

11-50Median size (employees)

4.2%Largest-city concentration · London

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

118

11-50

51-200

201-500

501-1,000

1,001-5,000

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 261 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 food processing water treatment, 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 “food processing water treatment”. 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 food processing water treatment), 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 food processing water treatment, 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, 1,665 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 20, 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 food processing water treatment, 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 food processing water treatment are there based in the United Kingdom?

RevenueBase identified 261 food processing water treatment 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 food processing water treatment?

London leads with 11 headquartered companies, followed by Birmingham (5) and Bristol (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 1,665 verified decision-maker contacts tracked across these 261 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 20, 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.