Company lists · Data refreshed September 2026

Top 25 Chemical processing wastewater treatment companies based in the United Kingdom

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

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 153 companies tracked

RevenueBase identified 153 chemical processing wastewater treatment companies headquartered in the United Kingdom as of September 2026 and tracks 2,183 professional contacts across them, including 1,085 with verified work emails. London is the largest hub.

This list covers chemical processing wastewater treatment companies 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 16, 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 16, 2026 86% judged on-target in blind review

153Companies

2,183Contacts tracked

1,085Verified emails

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The 25 largest chemical processing wastewater treatment companies based in the United Kingdom

Ranked by team size

Top 25 of 153 chemical processing wastewater treatment companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to chemical processing wastewater treatment companies: 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 16, 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 16, 2026
2	Industrial Chemicals LTD	Partial evidence	Grays, United KingdomHQ checked Sep 16, 2026	201-500	167 contacts →
	Partial evidence “Industrial Chemicals Limited (ICL) is a trusted supplier to a diverse range of industries across the UK, Europe, and parts of Asia.” Source: RevenueBase Database · checked Sep 16, 2026
3	Severn Trent Services	Indirect evidence	Coventry, United KingdomHQ checked Sep 16, 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 16, 2026
4	Siltbuster LTD	Partial evidence	Monmouth, United KingdomHQ checked Sep 16, 2026	51-200	75 contacts →
	Partial 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 16, 2026
5	Richard Alan	Indirect evidence	Dewsbury, United KingdomHQ checked Sep 16, 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 16, 2026
6	Jacopa Limited	Partial evidence	West Bromwich, United KingdomHQ checked Sep 16, 2026	51-200	73 contacts →
	Partial 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 16, 2026
7	Castle Environmental	Partial evidence	Ilkeston, United KingdomHQ checked Sep 16, 2026	51-200	49 contacts →
	Partial evidence “Castle Environmental is a leading supplier of specialist waste treatment, disposal and recycling services.” Source: RevenueBase Database · checked Sep 16, 2026
8	Atac Solutions LTD	Partial evidence	Maidstone, United KingdomHQ checked Sep 16, 2026	11-50	44 contacts →
	Partial evidence “ATAC Solutions Ltd is a leading UK environmental services company specialising in wastewater services and wastewater equipment on a capital purchase or hire basis.” Source: RevenueBase Database · checked Sep 16, 2026
9	Bluewater BIO	Strong evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	43 contacts →
	Strong evidence “Bluewater Bio is an award winning global leader in sustainable water and wastewater treatment.” Source: RevenueBase Database · checked Sep 16, 2026
10	Hydro Industries Limited	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	40 contacts →
	Indirect evidence “Hydro Industries.generating clean water Clean Water is a limited natural resource essential for life and economic growth.” Source: RevenueBase Database · checked Sep 16, 2026
11	Water Treatment Products LTD	Strong evidence	Blaenavon, United KingdomHQ checked Sep 16, 2026	51-200	40 contacts →
	Strong evidence “Water Treatment Products Ltd, established in formulate and manufacture speciality chemicals for a wide range of water treatment companies and applications.” Source: RevenueBase Database · checked Sep 16, 2026
12	Elentec	Partial evidence	Bethesda, United KingdomHQ checked Sep 16, 2026	11-50	36 contacts →
	Partial evidence “Elentec develops and supplies electrochemical water treatment systems - together with appropriate separation technology.” Source: RevenueBase Database · checked Sep 16, 2026
13	Wcsee Wastewater Marlowe Environmental Services	Partial evidence	Gloucester, United KingdomHQ checked Sep 16, 2026	11-50	32 contacts →
	Partial evidence “At WCSEE we collaborate closely with our clients to design and deliver reliable, robust, and future-proofed wastewater systems tailored to site specific requirements.” Source: RevenueBase Database · checked Sep 16, 2026
14	Arvia Technology	Partial evidence	Runcorn, United KingdomHQ checked Sep 16, 2026	11-50	32 contacts →
	Partial evidence “Tertiary water treatment specialist.” Source: RevenueBase Database · checked Sep 16, 2026
15	Acwa Services Limited	Strong evidence	Skipton, United KingdomHQ checked Sep 16, 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 16, 2026
16	KEE	Strong evidence	Aylesbury, United KingdomHQ checked Sep 16, 2026	51-200	21 contacts →
	Strong evidence “KEE KEE is a globally recognised brand operating within in the industrial, commercial and domestic wastewater treatment industries.” Source: RevenueBase Database · checked Sep 16, 2026
17	Te-Tech Process Solutions	Indirect evidence	Southampton, United KingdomHQ checked Sep 16, 2026	501-1,000	16 contacts →
	Indirect 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 16, 2026
18	Viltra	Strong evidence	Newry, United KingdomHQ checked Sep 16, 2026	11-50	14 contacts →
	Strong 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 16, 2026
19	Aquabio LTD	Indirect evidence	Worcester, United KingdomHQ checked Sep 16, 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 16, 2026
20	Bywater Services LTD	Strong evidence	Coalville, United KingdomHQ checked Sep 16, 2026	11-50	13 contacts →
	Strong evidence “Established in ByWater Services is a UK specialist in commercial water treatment, water recycling and wastewater management solutions.” Source: RevenueBase Database · checked Sep 16, 2026
21	Ctech Europe LTD	Strong evidence	Neston, United KingdomHQ checked Sep 16, 2026	11-50	13 contacts →
	Strong evidence “Manufacturers of PolyClay® Wastewater Treatment Chemistry and Specialists in Industrial Wastewater Treatment and Sludge Dewatering - production and supply of industrial wastewater…” Source: RevenueBase Database · checked Sep 16, 2026
22	Plantwork Systems LTD	Strong evidence	Alton, United KingdomHQ checked Sep 16, 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 16, 2026
23	Euroby Limited	Partial evidence	Worthing, United KingdomHQ checked Sep 16, 2026	11-50	12 contacts →
	Partial evidence “Euroby Limited is one of the UK’s leading environmental waste processing organisations.” Source: RevenueBase Database · checked Sep 16, 2026
24	Esmil Process Systems	Indirect evidence	High Wycombe Bucks, United KingdomHQ checked Sep 16, 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 16, 2026
25	Evergreen Water Solutions LTD	Strong evidence	Hinckley, United KingdomHQ checked Sep 16, 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 16, 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: chemical processing wastewater treatment companies. 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 chemical processing wastewater treatment companies.
Partial evidence: Its own public description names part of chemical processing wastewater treatment companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name chemical processing wastewater treatment companies. 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 153 chemical processing wastewater treatment companies based in the United Kingdom

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Chemical processing wastewater treatment companies based in the United Kingdom at a glance

As of Sep 16, 2026

49.7%Verified-email coverage

14.3Average contacts per company

11-50Median size (employees)

5.9%Largest-city concentration · London

Sep 16, 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 153 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 chemical processing wastewater treatment companies, 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 “chemical processing wastewater treatment companies”. 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 chemical processing wastewater treatment companies), 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 chemical processing wastewater treatment companies, 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, 1,085 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 16, 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 chemical processing wastewater treatment companies, 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 chemical processing wastewater treatment companies are there based in the United Kingdom?

RevenueBase identified 153 chemical processing wastewater treatment companies 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 chemical processing wastewater treatment companies?

London leads with 9 headquartered companies, followed by Coventry (4) and Newry (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 1,085 verified decision-maker contacts tracked across these 153 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 16, 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.