Company lists · Data refreshed September 2026

Top 25 Stormwater management companies based in the United Kingdom

Name: Stormwater management 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 7, 2026 136 companies tracked

RevenueBase identified 136 stormwater management companies headquartered in the United Kingdom as of September 2026 and tracks 2,147 professional contacts across them, including 1,024 with verified work emails and 131 with mobile numbers. London is the largest hub.

This list covers stormwater management 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 7, 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 7, 2026 86% judged on-target in blind review

136Companies

2,147Contacts tracked

1,024Verified emails

131Mobile numbers

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The 25 largest stormwater management companies based in the United Kingdom

Ranked by team size

Top 25 of 136 stormwater management companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 7, 2026. RevenueBase Smart Search rates how each company's information relates to stormwater management 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	Hydro International	Partial evidence	Clevedon, United KingdomHQ checked Sep 7, 2026	201-500	166 contacts →
	“Hydro International, a CRH Company, provides advanced products, services and expertise to help municipal, industrial and construction customers to improve their water management…” Source: company website · checked Sep 7, 2026
2	Severn Trent Services	Indirect evidence	Coventry, United KingdomHQ checked Sep 7, 2026	1,001-5,000	137 contacts →
	“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: company website · checked Sep 7, 2026
3	Envolve Infrastructure	Indirect evidence	Cardiff Road, United KingdomHQ checked Sep 7, 2026	201-500	136 contacts →
	“We’re envolve, specialist civil engineers.” Source: company website · checked Sep 7, 2026
4	Alumasc Water Management Solutions	Partial evidence	Kettering, United KingdomHQ checked Sep 7, 2026	51-200	112 contacts →
	“AWMS, part of Alumasc Group, is the first joined-up brand in integrated water management.” Source: company website · checked Sep 7, 2026
5	Land Water	Indirect evidence	Guildford, United KingdomHQ checked Sep 7, 2026	201-500	109 contacts →
	“Land + Water is more than just a dredging company.” Source: company website · checked Sep 7, 2026
6	ACO Technologies PLC	Partial evidence	Shefford, United KingdomHQ checked Sep 7, 2026	201-500	85 contacts →
	“ACO is recognised as a global leader in the development and manufacture of high performance surface water management systems.” Source: company website · checked Sep 7, 2026
7	Marshalls Civils & Drainage	Indirect evidence	Elland, United KingdomHQ checked Sep 7, 2026	1,001-5,000	77 contacts →
	“At Marshalls Civils & Drainage, we deliver engineered precast solutions for infrastructure that must perform today and over the long term.” Source: company website · checked Sep 7, 2026
8	GEL Engineering	Indirect evidence	Enfield, United KingdomHQ checked Sep 7, 2026	51-200	70 contacts →
	“Welcome to Gel Engineering.” Source: company website · checked Sep 7, 2026
9	Glanville Environmental	Indirect evidence	Ivybridge, United KingdomHQ checked Sep 7, 2026	201-500	64 contacts →
	“Glanville Environmental help commercial infrastructure owners reduce pollution and flood risk by inspecting and maintaining ageing drainage systems and installing new…” Source: company website · checked Sep 7, 2026
10	Waterco Datrys	Indirect evidence	Ruthin, United KingdomHQ checked Sep 7, 2026	11-50	59 contacts →
	“Waterco Datrys is a leading consultancy in water and environmental engineering, formed through the merger of Waterco and Datrys in 2024.” Source: company website · checked Sep 7, 2026
11	ESD Joint Venture	Indirect evidence	Stepps, United KingdomHQ checked Sep 7, 2026	201-500	58 contacts →
	“How we manage water and wastewater systems now will be critical for our communities and ecosystems for many generations to come.” Source: company website · checked Sep 7, 2026
12	BSG	Indirect evidence	Maghera, United KingdomHQ checked Sep 7, 2026	51-200	49 contacts →
	“With over 40 year’s industry experience, we are a leading engineering contractor with specialist expertise in the water and wastewater sector.” Source: company website · checked Sep 7, 2026
13	Polypipe Civils & Green Urbanisation	Partial evidence	Loughborough, United KingdomHQ checked Sep 7, 2026	1,001-5,000	43 contacts →
	“Part of the Genuit Group, Polypipe Civils & Green Urbanisation is a market-leading manufacturer of innovative water management, network and green asset solutions, working to…” Source: company website · checked Sep 7, 2026
14	Graf UK LTD	Partial evidence	Banbury, United KingdomHQ checked Sep 7, 2026	51-200	43 contacts →
	“Graf UK Ltd was formed following the acquisition of SCP Water Management Ltd by Graf GmbH, the European market leaders in rainwater harvesting.” Source: company website · checked Sep 7, 2026
15	JBA Bentley	Indirect evidence	Leeds, United KingdomHQ checked Sep 7, 2026	501-1,000	40 contacts →
	“Celebrating over a decade of delivery, JBA Bentley is an integrated design and build contractor, bringing together environmental and civil engineering expertise, specialising in…” Source: company website · checked Sep 7, 2026
16	Veriflo Limited	Partial evidence	East Malling, United KingdomHQ checked Sep 7, 2026	11-50	39 contacts →
	“Veriflo Ltd - a professional strategic project management company, specialising in clean water asset services.” Source: company website · checked Sep 7, 2026
17	Wcsee Wastewater Marlowe Environmental Services	Indirect evidence	Gloucester, United KingdomHQ checked Sep 7, 2026	11-50	32 contacts →
	“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: company website · checked Sep 7, 2026
18	Watertight Management	Partial evidence	Bromsgrove, United KingdomHQ checked Sep 7, 2026	51-200	31 contacts →
	“Watertight Management has established itself as a leader in the provision of Clean and Waste water management services.” Source: company website · checked Sep 7, 2026
19	Bedford Pumps	Indirect evidence	Kempston, United KingdomHQ checked Sep 7, 2026	11-50	28 contacts →
	“Bedford Pumps, part of the Hidrostal Group, are a flexible, highly experienced British manufacturer of robust pumping plant for the water, wastewater, flood control and dock…” Source: company website · checked Sep 7, 2026
20	Damm Environmental	Indirect evidence	Hillington Industrial Estate, United KingdomHQ checked Sep 7, 2026	51-200	24 contacts →
	“DAMM Environmental - The Leading Drainage & Environmental Company in Scotland At DAMM Environmental we are renowned for the high quality of our work in both the public and private…” Source: company website · checked Sep 7, 2026
21	Aquevo	Partial evidence	London, United KingdomHQ checked Sep 7, 2026	11-50	24 contacts →
	“Aquevo Limited, headquartered in North West London, is a leading provider of integrated water management services.” Source: company website · checked Sep 7, 2026
22	Ukdn Waterflow LG LTD	Indirect evidence	Birmingham, United KingdomHQ checked Sep 7, 2026	201-500	24 contacts →
	“UKDN Waterflow (LG) Ltd – Respond \| Report \| Repair As of November 2015 UKDN Waterflow (LG) Ltd was acquired by Lanes Group plc the Largest wholly owned UK Drainage solution…” Source: company website · checked Sep 7, 2026
23	Lanes Group PLC	Indirect evidence	Leeds, United KingdomHQ checked Sep 7, 2026	1,001-5,000	22 contacts →
	“Lanes Group is more than a wastewater solutions provider.” Source: company website · checked Sep 7, 2026
24	Keytec Installation Services	Partial evidence	Rochdale, United KingdomHQ checked Sep 7, 2026	51-200	21 contacts →
	“Keytec Installation Services supplies and installs stormwater attenuation systems, soakaways, sub-base replacement modules, geomembrane applications including pond-lining and…” Source: company website · checked Sep 7, 2026
25	Gravitas International	Indirect evidence	Altrincham, United KingdomHQ checked Sep 7, 2026	11-50	21 contacts →
	“Gravitas International are UK based manufacturers and distributors of unique and innovative products for the Water & Environmental Sector.” Source: company website · checked Sep 7, 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: stormwater management 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 stormwater management companies.
Partial evidence: Its own public description names part of stormwater management companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name stormwater management 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 136 stormwater management companies based in the United Kingdom

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Stormwater management companies based in the United Kingdom at a glance

As of Sep 7, 2026

47.7%Verified-email coverage

6.1%Mobile-number coverage

15.8Average contacts per company

11-50Median size (employees)

7.4%Largest-city concentration · London

Sep 7, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

9490–30

6931–60

261–90

190–180

3180+

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 stormwater management 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 “stormwater management 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 stormwater management 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 stormwater management 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, 1,024 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 7, 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 stormwater management 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 stormwater management companies are there based in the United Kingdom?

RevenueBase identified 136 stormwater management 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?

Hydro International, headquartered in Clevedon, tops this list with the largest team on record.

Which city has the most stormwater management companies?

London leads with 10 headquartered companies, followed by Coventry (3) and Leeds (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 1,024 verified decision-maker contacts tracked across these 136 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 7, 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.