Company lists · Data refreshed September 2026

Top 25 Municipal water system contractors based in the United Kingdom

Name: Municipal water system contractors based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 118 companies tracked

RevenueBase identified 118 municipal water system contractors headquartered in the United Kingdom as of September 2026 and tracks 11,119 professional contacts across them, including 5,124 with verified work emails. London is the largest hub.

This list covers municipal water system contractors 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 17, 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 17, 2026 86% judged on-target in blind review

118Companies

11,119Contacts tracked

5,124Verified emails

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The 25 largest municipal water system contractors based in the United Kingdom

Ranked by team size

Top 25 of 118 municipal water system contractors based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to municipal water system contractors: 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 17, 2026	5,001-10,000	5,563 contacts →
	Partial evidence “Water is wonderful.” Source: RevenueBase Database · checked Sep 17, 2026
2	DŴR Cymru Welsh Water	Indirect evidence	Cardiff, United KingdomHQ checked Sep 17, 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 17, 2026
3	MWH Treatment	Partial evidence	Stockport, United KingdomHQ checked Sep 17, 2026	1,001-5,000	879 contacts →
	Partial 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 17, 2026
4	Sapphire Utility Solutions LTD	Indirect evidence	Bamber Bridge, United KingdomHQ checked Sep 17, 2026	1,001-5,000	324 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 17, 2026
5	Severn Trent Services	Partial evidence	Coventry, United KingdomHQ checked Sep 17, 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 17, 2026
6	S&r Construction LTD	Partial evidence	Brierley Hill, United KingdomHQ checked Sep 17, 2026	201-500	137 contacts →
	Partial evidence “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.” Source: RevenueBase Database · checked Sep 17, 2026
7	Envolve Infrastructure	Indirect evidence	Cardiff Road, United KingdomHQ checked Sep 17, 2026	201-500	136 contacts →
	Indirect evidence “We’re envolve, specialist civil engineers.” Source: RevenueBase Database · checked Sep 17, 2026
8	Enpure	Partial evidence	Birmingham, United KingdomHQ checked Sep 17, 2026	51-200	113 contacts →
	Partial 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 17, 2026
9	Alumasc Water Management Solutions	Partial evidence	Kettering, United KingdomHQ checked Sep 17, 2026	51-200	112 contacts →
	Partial evidence “AWMS, part of Alumasc Group, is the first joined-up brand in integrated water management.” Source: RevenueBase Database · checked Sep 17, 2026
10	Infrastructure Gateway LTD	Indirect evidence	Kettering, United KingdomHQ checked Sep 17, 2026	51-200	76 contacts →
	Indirect evidence “Infrastructure Gateway Ltd have been working with developers providing them with the expertise to deliver the utilities on construction projects for over 20 years.” Source: RevenueBase Database · checked Sep 17, 2026
11	GEL Engineering	Indirect evidence	Enfield, United KingdomHQ checked Sep 17, 2026	51-200	70 contacts →
	Indirect evidence “Welcome to Gel Engineering.” Source: RevenueBase Database · checked Sep 17, 2026
12	ESD Joint Venture	Strong evidence	Stepps, United KingdomHQ checked Sep 17, 2026	201-500	58 contacts →
	Strong 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 17, 2026
13	BSG	Strong evidence	Maghera, United KingdomHQ checked Sep 17, 2026	51-200	49 contacts →
	Strong evidence “With over 40 year’s industry experience, we are a leading engineering contractor with specialist expertise in the water and wastewater sector.” Source: RevenueBase Database · checked Sep 17, 2026
14	Veriflo Limited	Partial evidence	East Malling, United KingdomHQ checked Sep 17, 2026	11-50	39 contacts →
	Partial evidence “Veriflo Ltd - a professional strategic project management company, specialising in clean water asset services.” Source: RevenueBase Database · checked Sep 17, 2026
15	Bethell Utility Services Limited	Indirect evidence	Manchester, United KingdomHQ checked Sep 17, 2026	51-200	37 contacts →
	Indirect evidence “Forming part of the larger Bethell Group our Multi Utility division provides in-house Design & Construction throughout the North West, Wales and Yorkshire to major developers…” Source: RevenueBase Database · checked Sep 17, 2026
16	Wcsee Wastewater Marlowe Environmental Services	Partial evidence	Gloucester, United KingdomHQ checked Sep 17, 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 17, 2026
17	Watertight Management	Partial evidence	Bromsgrove, United KingdomHQ checked Sep 17, 2026	51-200	31 contacts →
	Partial evidence “Watertight Management has established itself as a leader in the provision of Clean and Waste water management services.” Source: RevenueBase Database · checked Sep 17, 2026
18	M & S Water Services Utilities Limited	Partial evidence	Luton, United KingdomHQ checked Sep 17, 2026	51-200	29 contacts →
	Partial evidence “M&S Water Services (Utilities) Limited has been trading since 1997 when the company was set up to bridge the gap between water companies and the customer that domestic plumbers…” Source: RevenueBase Database · checked Sep 17, 2026
19	Retroflo	Strong evidence	Seaham, United KingdomHQ checked Sep 17, 2026	11-50	25 contacts →
	Strong evidence “Based in the North East of England, Retroflo Ltd are an Electrical and Mechanical contractor whose main activities are focused in the water industry.” Source: RevenueBase Database · checked Sep 17, 2026
20	Infinity Utilities	Indirect evidence	East Sussex, United KingdomHQ checked Sep 17, 2026	51-200	21 contacts →
	Indirect evidence “Infinity Utilities Ltd is a forward-thinking utility solutions provider dedicated to delivering reliable, efficient, and cost-effective services to residential, commercial, and…” Source: RevenueBase Database · checked Sep 17, 2026
21	Inactive	Indirect evidence	Washington, United KingdomHQ checked Sep 17, 2026	201-500	16 contacts →
	Indirect evidence “Fastflow Pipeline Services provides a comprehensive range of utility infrastructure services covering all aspects of pipeline networks including investigation, design, planning…” Source: RevenueBase Database · checked Sep 17, 2026
22	NPB Utilities Limited	Partial evidence	Yeovil, United KingdomHQ checked Sep 17, 2026	51-200	15 contacts →
	Partial evidence “At NPB Utilities Ltd we pride ourselves for the superior quality and diverse range of services that we provide in the water and civils industry.” Source: RevenueBase Database · checked Sep 17, 2026
23	WCI Group LTD	Partial evidence	Taunton, United KingdomHQ checked Sep 17, 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 17, 2026
24	Plantwork Systems LTD	Strong evidence	Alton, United KingdomHQ checked Sep 17, 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 17, 2026
25	Waterwise Utilities LTD	Strong evidence	Clydebank, United KingdomHQ checked Sep 17, 2026	11-50	13 contacts →
	Strong evidence “WaterWise Utilities Ltd is an LRQA-accredited utility infrastructure contractor delivering high-quality water, electrical and traffic management solutions across Scotland.” Source: RevenueBase Database · checked Sep 17, 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 system contractors. 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 system contractors.
Partial evidence: Its own public description names part of municipal water system contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name municipal water system contractors. 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 118 municipal water system contractors based in the United Kingdom

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Municipal water system contractors based in the United Kingdom at a glance

As of Sep 17, 2026

46.1%Verified-email coverage

94.2Average contacts per company

11-50Median size (employees)

5.9%Largest-city concentration · London

Sep 17, 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

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 118 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 system contractors, 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 system contractors”. 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 system contractors), 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 system contractors, 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, 5,124 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 17, 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 system contractors, 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 system contractors are there based in the United Kingdom?

RevenueBase identified 118 municipal water system contractors 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 system contractors?

London leads with 7 headquartered companies, followed by Coventry (3) and Bridgwater (2).

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 5,124 verified decision-maker contacts tracked across these 118 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 17, 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.