Company lists · Data refreshed September 2026

Top 25 Brackish water treatment plant builders based in the United Kingdom

Name: Brackish water treatment plant builders 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 115 companies tracked

RevenueBase identified 115 brackish water treatment plant builders headquartered in the United Kingdom as of September 2026 and tracks 3,106 professional contacts across them, including 1,606 with verified work emails. London is the largest hub.

This list covers brackish water treatment plant builders 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

115Companies

3,106Contacts tracked

1,606Verified emails

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The 25 largest brackish water treatment plant builders based in the United Kingdom

Ranked by team size

Top 25 of 115 brackish water treatment plant builders 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 brackish water treatment plant builders: 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	MWH Treatment	Strong evidence	Stockport, United KingdomHQ checked Sep 19, 2026	1,001-5,000	879 contacts →
	Strong evidence “MWH Treatment is a leading Design and Build non-infrastructure solution provider in the UK water sector, with a water sector heritage dating back to 1820.” Source: RevenueBase Database · checked Sep 19, 2026
2	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
3	Biwater	Partial evidence	Surrey, United KingdomHQ checked Sep 19, 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 19, 2026
4	Severn Trent Services	Indirect evidence	Coventry, United KingdomHQ checked Sep 19, 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 19, 2026
5	Enpure	Strong evidence	Birmingham, United KingdomHQ checked Sep 19, 2026	51-200	113 contacts →
	Strong 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 19, 2026
6	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
7	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
8	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
9	Richard Alan	Indirect evidence	Dewsbury, United KingdomHQ checked Sep 19, 2026	51-200	74 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 19, 2026
10	ESD Joint Venture	Partial evidence	Stepps, United KingdomHQ checked Sep 19, 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 19, 2026
11	Hydrotec Water Treatment Specialists	Strong evidence	High Wycombe, United KingdomHQ checked Sep 19, 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 19, 2026
12	Filpumps LTD	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 19, 2026	11-50	28 contacts →
	Indirect evidence “Filpumps was established in 1992 to fulfil a number of external factors.” Source: RevenueBase Database · checked Sep 19, 2026
13	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
14	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
15	Te-Tech Process Solutions	Partial evidence	Southampton, United KingdomHQ checked Sep 19, 2026	501-1,000	16 contacts →
	Partial evidence “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.” Source: RevenueBase Database · checked Sep 19, 2026
16	Synthesis	Strong evidence	Alderley Edge, United KingdomHQ checked Sep 19, 2026	51-200	15 contacts →
	Strong evidence “We specialise in water treatment and disinfection, operating in almost every industry where water treatment is required.” Source: RevenueBase Database · checked Sep 19, 2026
17	Viltra	Partial evidence	Newry, United KingdomHQ checked Sep 19, 2026	11-50	14 contacts →
	Partial evidence “Viltra specialises in designing, manufacturing and installing wastewater treatment solutions for a wide range of sectors throughout the UK and Ireland, including domestic…” Source: RevenueBase Database · checked Sep 19, 2026
18	Aquabio LTD	Indirect evidence	Worcester, United KingdomHQ checked Sep 19, 2026	11-50	14 contacts →
	Indirect evidence “Aquabio is a pioneering company born with a passion for innovation combined with a strong ethos for environmental sustainability.” Source: RevenueBase Database · checked Sep 19, 2026
19	Plantwork Systems LTD	Strong evidence	Alton, United KingdomHQ checked Sep 19, 2026	11-50	13 contacts →
	Strong evidence “Plantwork Systems Ltd (PWS) provides water and wastewater treatment solutions with a strong focus on sustainability, innovation and cost efficiency.” Source: RevenueBase Database · checked Sep 19, 2026
20	Esmil Process Systems	Indirect evidence	High Wycombe Bucks, United KingdomHQ checked Sep 19, 2026	1-10	12 contacts →
	Indirect evidence “ESMIL Process Systems is an award winning Construction company located in United Kingdom.” Source: RevenueBase Database · checked Sep 19, 2026
21	Adept Pure Water LTD	Strong evidence	Wellingborough, United KingdomHQ checked Sep 19, 2026	11-50	11 contacts →
	Strong evidence “ADEPT Pure Water Limited are specialists in the design, manufacture, commission, installation and Service of Water Purification and Treatment Plant and equipment.” Source: RevenueBase Database · checked Sep 19, 2026
22	Evergreen Water Solutions LTD	Strong evidence	Hinckley, United KingdomHQ checked Sep 19, 2026	11-50	10 contacts →
	Strong evidence “Evergreen Water Solutions works closely with a number of international engineering companies whose expertise is in scalable wastewater treatment systems and containerised…” Source: RevenueBase Database · checked Sep 19, 2026
23	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
24	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
25	Sheers Limited	Indirect evidence	Darlington, United KingdomHQ checked Sep 19, 2026	11-50	9 contacts →
	Indirect evidence “Sheers Ltd are an established engineering company based in the North East of England.” 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: brackish water treatment plant builders. 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 brackish water treatment plant builders.
Partial evidence: Its own public description names part of brackish water treatment plant builders, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name brackish water treatment plant builders. 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 115 brackish water treatment plant builders based in the United Kingdom

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Brackish water treatment plant builders based in the United Kingdom at a glance

As of Sep 19, 2026

51.7%Verified-email coverage

27.0Average contacts per company

11-50Median size (employees)

4.3%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

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 115 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 brackish water treatment plant builders, 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 “brackish water treatment plant builders”. 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 brackish water treatment plant builders), 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 brackish water treatment plant builders, 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, 1,606 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 brackish water treatment plant builders, 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 brackish water treatment plant builders are there based in the United Kingdom?

RevenueBase identified 115 brackish water treatment plant builders 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?

MWH Treatment, headquartered in Stockport, tops this list with the largest team on record.

Which city has the most brackish water treatment plant builders?

London leads with 5 headquartered companies, followed by Newry (4) and Coventry (3).

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 1,606 verified decision-maker contacts tracked across these 115 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.