Company lists · Data refreshed November 2026

Top 25 Water system service providers based in the United Kingdom

RevenueBase identified 411 company matches for water system service providers associated with the United Kingdom as of November 2026 and tracks 36,197 professional contacts across them, including 12,719 with verified work emails. London is the largest hub.

This list covers company matches for water system service providers 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 November 6, 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 Nov 6, 2026 How this list was built
411Companies
36,197Contacts tracked
12,719Verified emails
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The 25 largest water system service providers based in the United Kingdom

Ranked by team size
Top 25 of 411 company matches for water system service providers based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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 matchReading, United KingdomHQ recorded Nov 6, 20261,001-5,0006,329 contacts →

Exact match

“Thames Water is the UK’s biggest water and wastewater services provider, providing 2.7 billion litres of drinking water and safely removing 4.6 billion litres of wastewater every…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchCoventry, United KingdomHQ recorded Nov 6, 20265,001-10,0006,089 contacts →

Exact match

“Water is wonderful.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchHuntingdon, United KingdomHQ recorded Nov 6, 20265,001-10,0003,747 contacts →

Exact match

“Anglian Water supply water and water recycling services to more than six million domestic and business customers in the east of England and Hartlepool.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchBradford, United KingdomHQ recorded Nov 6, 20261,001-5,0003,095 contacts →

Exact match

“We’re Yorkshire Water.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchCardiff, United KingdomHQ recorded Nov 6, 20261,001-5,0001,970 contacts →

Exact match

“Bath-times, half-times, party-times, meeting-times, and cooking-times.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchDurham, United KingdomHQ recorded Nov 6, 20261,001-5,0001,757 contacts →

Exact match

“NWG (Northumbrian Water Group) provides water and sewerage services to 2.7 million people in the North East of England as Northumbrian Water, and water services to 1.5 million…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchStevenage, United KingdomHQ recorded Nov 6, 20261,001-5,0001,142 contacts →

Exact match

“With a significant national workforce operating daily in local communities, we support our clients to keep their assets resilient ensuring customer taps flow, and all wastewater…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchHatfield, United KingdomHQ recorded Nov 6, 20261,001-5,0001,028 contacts →

Exact match

“Our vision is to be the leading community-focused water company.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchEastleigh, United KingdomHQ recorded Nov 6, 2026501-1,000531 contacts →

Exact match

“Selwood is your trusted partner in mission-critical water handling, storage, and treatment solutions across the UK.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchBamber Bridge, United KingdomHQ recorded Nov 6, 20261,001-5,000342 contacts →

Exact match

“Sapphire Utility Solutions has quickly become a trusted name in the utility, transport and highways sectors, known for our capabilities in delivering innovative solutions to meet…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchCoventry, United KingdomHQ recorded Nov 6, 20261,001-5,000310 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 · Nov 6, 2026 · View company records in RevenueBase
12Exact matchBristol, United KingdomHQ recorded Nov 6, 2026201-500309 contacts →

Exact match

“Bristol Water is part of Pennon Group plc.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchHavant, United KingdomHQ recorded Nov 6, 2026201-500284 contacts →

Exact match

“Portsmouth Water have been supplying water to Portsmouth and the surrounding area since 1857.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchDereham, United KingdomHQ recorded Nov 6, 2026501-1,000258 contacts →

Exact match

“Culligan UK delivers innovative, high-quality water solutions to homes and businesses across the United Kingdom.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchWalsall, United KingdomHQ recorded Nov 6, 2026501-1,000257 contacts →

Exact match

“South Staffs Water is a private water company formed in 1853 to provide water to the inhabitants of the Black Country.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchBrierley Hill, United KingdomHQ recorded Nov 6, 2026201-500139 contacts →

Exact match

“S&R Construction was founded in 1998 with a view to providing affordable, sustainable gas, water and electric mains and utility installation services for a broad range of clients.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchMonmouth, United KingdomHQ recorded Nov 6, 202651-20087 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 · Nov 6, 2026 · View company records in RevenueBase
18Exact matchGravesend, United KingdomHQ recorded Nov 6, 202651-20080 contacts →

Exact match

“Metcor Environmental is one of the UK’s leading commercial drainage, plumbing and pump engineering firms.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchLondon, United KingdomHQ recorded Nov 6, 2026201-50075 contacts →

Exact match

“J A Brooks was established in 1925 and has a long history in the delivery of Public health and Water services in the London and South East and hold an excellent reputation as one…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchWoore, United KingdomHQ recorded Nov 6, 202651-20070 contacts →

Exact match

“Established in 1959, T-T started out as a general engineering company before growing to consist of 6 divisions – T-T Pumps, T-T Controls and Automation, T-T Flow Valves, T-T…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchKent, United KingdomHQ recorded Nov 6, 202651-20068 contacts →

Exact match

“Willow Pumps provide expert services for all your pump, drainage, waste and clean water needs.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchColchester, United KingdomHQ recorded Nov 6, 202651-20052 contacts →

Exact match

“As the UK’s foremost provider of alternative water services, we’re dedicated to ensuring that every business and household has access to a quality water supply – no matter what.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchWolverhampton, United KingdomHQ recorded Nov 6, 202651-20048 contacts →

Exact match

“We are one of the UK’s fastest growing in and most dynamic maintenance services organisations, encompassing several specialist engineering operations within the group.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchBournemouth, United KingdomHQ recorded Nov 6, 202651-20045 contacts →

Exact match

“Pennon Water Services (PWS) provides B2B water and wastewater retail services to business accounts across England and Scotland.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchMilton Keynes, United KingdomHQ recorded Nov 6, 202611-5042 contacts →

Exact match

“Plumbing & Gas Solutions Ltd are a Constructionline and CHAS accredited Commercial Plumbing & Heating contractor based in Milton Keynes.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 411 water system service providers based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 12,719 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Water system service providers based in the United Kingdom at a glance

As of Nov 6, 2026
35.1%Verified-email coverage
88.1Average contacts per company
11-50Median size (employees)
7.3%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
179
11-50
146
51-200
41
201-500
6
501-1,000
6
1,001-5,000
12
5,001-10,000
3

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 411 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 system service providers” 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 12,719 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 November 6, 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.

Water system service providers by metro

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 system service providers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many water system service providers are there based in the United Kingdom?

RevenueBase identified 411 company matches for water system service providers associated with the United Kingdom as of November 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?

Thames Water tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most water system service providers?

London leads with 30 company records, followed by Manchester (6) and Barnsley (5).

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 12,719 professional contacts with verified work emails tracked across these 411 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 November 6, 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 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.