Company lists · Data refreshed September 2026

Top 25 Municipal water treatment providers based in the United Kingdom

Name: Municipal water treatment providers 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 103 companies tracked

RevenueBase identified 103 municipal water treatment providers headquartered in the United Kingdom as of September 2026 and tracks 10,156 professional contacts across them, including 4,746 with verified work emails. Colchester is the largest hub.

This list covers municipal water treatment providers 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

103Companies

10,156Contacts tracked

4,746Verified emails

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The 25 largest municipal water treatment providers based in the United Kingdom

Ranked by team size

Top 25 of 103 municipal water treatment providers 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 municipal water treatment providers: 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	Severn Trent	Partial evidence	Coventry, United KingdomHQ checked Sep 20, 2026	5,001-10,000	5,563 contacts →
	Partial evidence “Water is wonderful.” Source: RevenueBase Database · checked Sep 20, 2026
2	DŴR Cymru Welsh Water	Indirect evidence	Cardiff, United KingdomHQ checked Sep 20, 2026	1,001-5,000	1,868 contacts →
	Indirect evidence “Bath-times, half-times, party-times, meeting-times, and cooking-times.” Source: RevenueBase Database · checked Sep 20, 2026
3	Affinity Water	Partial evidence	Hatfield, United KingdomHQ checked Sep 20, 2026	1,001-5,000	928 contacts →
	Partial evidence “Our vision is to be the leading community-focused water company.” Source: RevenueBase Database · checked Sep 20, 2026
4	South Staffs Water	Partial evidence	Walsall, United KingdomHQ checked Sep 20, 2026	501-1,000	238 contacts →
	Partial evidence “South Staffs Water is a private water company formed in 1853 to provide water to the inhabitants of the Black Country.” Source: RevenueBase Database · checked Sep 20, 2026
5	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
6	Severn Trent Services	Partial evidence	Coventry, United KingdomHQ checked Sep 20, 2026	1,001-5,000	137 contacts →
	Partial 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
7	Enpure	Strong evidence	Birmingham, United KingdomHQ checked Sep 20, 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 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	ESD Joint Venture	Partial evidence	Stepps, United KingdomHQ checked Sep 20, 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 20, 2026
11	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
12	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
13	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
14	TWC Total Water Care	Strong evidence	Bicester, United KingdomHQ checked Sep 20, 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 20, 2026
15	Acwa Services Limited	Strong evidence	Skipton, United KingdomHQ checked Sep 20, 2026	11-50	22 contacts →
	Strong evidence “ACWA Services Limited is a Municipal and Industrial Water and Wastewater Treatment company located in Skipton, United Kingdom.” Source: RevenueBase Database · checked Sep 20, 2026
16	Excel Water LTD	Strong evidence	Castleford, United KingdomHQ checked Sep 20, 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 20, 2026
17	Te-Tech Process Solutions	Strong evidence	Southampton, United KingdomHQ checked Sep 20, 2026	501-1,000	16 contacts →
	Strong 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 20, 2026
18	Trident Water Solutions Limited	Partial evidence	Royal Wootton Bassett, United KingdomHQ checked Sep 20, 2026	11-50	15 contacts →
	Partial evidence “Trident Water Solutions are a privately owned, independent company that prides itself on sector-leading levels, with a high quality service at a great value to the water…” Source: RevenueBase Database · checked Sep 20, 2026
19	Synthesis	Strong evidence	Alderley Edge, United KingdomHQ checked Sep 20, 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 20, 2026
20	WCI Group LTD	Partial evidence	Taunton, United KingdomHQ checked Sep 20, 2026	11-50	14 contacts →
	Partial evidence “WCI Group Ltd is the leading expert in water and wastewater engineering, delivering innovative solutions with over four decades of expertise.” Source: RevenueBase Database · checked Sep 20, 2026
21	Plantwork Systems LTD	Strong evidence	Alton, United KingdomHQ checked Sep 20, 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 20, 2026
22	Adept Pure Water LTD	Strong evidence	Wellingborough, United KingdomHQ checked Sep 20, 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 20, 2026
23	Hydrochem Group	Strong evidence	Hartlepool, United KingdomHQ checked Sep 20, 2026	11-50	11 contacts →
	Strong evidence “HydroChem Group is the longest-serving independent water treatment specialist in the North of England.” Source: RevenueBase Database · checked Sep 20, 2026
24	Aquatech Environmental Services Limited	Strong evidence	Wolverhampton, United KingdomHQ checked Sep 20, 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 20, 2026
25	Evergreen Water Solutions LTD	Strong evidence	Hinckley, United KingdomHQ checked Sep 20, 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 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: municipal water treatment providers. 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 municipal water treatment providers.
Partial evidence: Its own public description names part of municipal water treatment providers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name municipal water treatment providers. 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 103 municipal water treatment providers based in the United Kingdom

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Municipal water treatment providers based in the United Kingdom at a glance

As of Sep 20, 2026

46.7%Verified-email coverage

98.6Average contacts per company

11-50Median size (employees)

2.9%Largest-city concentration · Colchester

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 103 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 municipal water treatment providers, 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 “municipal water treatment providers”. 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 municipal water treatment providers), 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 municipal water treatment providers, 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, 4,746 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 municipal water treatment providers, 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 municipal water treatment providers are there based in the United Kingdom?

RevenueBase identified 103 municipal water treatment providers 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?

Severn Trent, headquartered in Coventry, tops this list with the largest team on record.

Which city has the most municipal water treatment providers?

Colchester leads with 3 headquartered companies, followed by Hatfield (3) and London (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 4,746 verified decision-maker contacts tracked across these 103 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.