Company lists · Data refreshed November 2026

Top 25 Hydrology assessment services based in the United Kingdom

RevenueBase identified 67 company matches for hydrology assessment services associated with the United Kingdom as of November 2026 and tracks 586 professional contacts across them, including 266 with verified work emails. London is the largest hub.

This list covers company matches for hydrology assessment services 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
67Companies
586Contacts tracked
266Verified emails
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The 25 largest hydrology assessment services based in the United Kingdom

Ranked by team size
Top 25 of 67 company matches for hydrology assessment services 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 matchRuthin, United KingdomHQ recorded Nov 6, 202611-5065 contacts →

Exact match

“Waterco Datrys is a leading consultancy in water and environmental engineering, formed through the merger of Waterco and Datrys in 2024.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchPerth, United KingdomHQ recorded Nov 6, 202611-5030 contacts →

Exact match

“Gavia Environmental Ltd is a specialist environmental consultancy based in Perthshire, Scotland, providing ecological and hydrological services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchShipston On Stour, United KingdomHQ recorded Nov 6, 202611-5029 contacts →

Exact match

“Measurement experts who use innovation to understand river functions and provide knowledge to inform projects that reduce flooding and improve natural habitats.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-5028 contacts →

Exact match

“Aegaea provides expertise in water, civils and environment including discharge of conditions for outline and full planning.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchStanstead Abbotts, United KingdomHQ recorded Nov 6, 202611-5024 contacts →

Exact match

“EAS provides expert advice on transport, flood-risk and infrastructure planning for new development.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchSurbiton, United KingdomHQ recorded Nov 6, 202611-5019 contacts →

Exact match

“Water Environment Limited provides technical consulting services, specific to the water and environmental sectors of engineering.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchBuxton, United KingdomHQ recorded Nov 6, 202611-5018 contacts →

Exact match

“Penny Anderson Associates has provided expert advice on ecology, hydrology and sustainable land management since the 1970s and has built up a reputation for professional integrity…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchBelfast, United KingdomHQ recorded Nov 6, 202611-5017 contacts →

Exact match

“Office Locations Belfast Based Consultancy Firm About Us MCL Consulting always operate as a team.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchEdinburgh, United KingdomHQ recorded Nov 6, 20261-1016 contacts →

Exact match

“Kaya Consulting Limited is Flood Risk Management company based in Edinburgh”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchReading, United KingdomHQ recorded Nov 6, 2026201-50013 contacts →

Exact match

“Hydro International, a CRH Company, provides advanced products, services and expertise to help municipal, industrial and construction customers to improve their water management…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchEdinburgh, United KingdomHQ recorded Nov 6, 202611-5013 contacts →

Exact match

“Caley Water is a water and environmental consultancy that offers a range of specialist hydraulic modelling, data survey management and civil engineering design services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchCrawley, United KingdomHQ recorded Nov 6, 20261-1012 contacts →

Exact match

“Unda is a specialist provider of Flood Risk Assessments (FRAs) and Drainage Assessments that support our diverse range of clients to gain planning approval, understand insurance…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchEdinburgh, United KingdomHQ recorded Nov 6, 202611-5011 contacts →

Exact match

“Gondolin Land & Water Ltd is a growing Environmental and Civil Engineering Consultancy business based in Scotland with coverage throughout England, Scotland and Ireland.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchBristol, United KingdomHQ recorded Nov 6, 202611-5010 contacts →

Exact match

“Edenvale Young is a Civil Engineering and Scientific Consultancy specialising in the fluvial, coastal and maritime environment.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchStaplefield, United KingdomHQ recorded Nov 6, 202611-508 contacts →

Exact match

“Richard Allitt Associates is a leading provider of hydraulic engineering and flood risk consultancy for the urban drainage industry.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchBirmingham, United KingdomHQ recorded Nov 6, 202611-508 contacts →

Exact match

“A team of highly experienced hydraulic modellers offering specialist integrated catchment modelling services and solutions using Infoworks ICM.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchNottingham, United KingdomHQ recorded Nov 6, 20261-107 contacts →

Exact match

“As part of The FPS Group, FPS Environmental Ltd delivers engineering excellence within the flood, water, and environmental sectors.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchCambridge, United KingdomHQ recorded Nov 6, 202611-505 contacts →

Exact match

“NHTB Consultancy, a professional and unique small civil engineering company offering extensive knowledge and services within the water industry.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchMonmouthshire, United KingdomHQ recorded Nov 6, 20261-105 contacts →

Exact match

“Hydrogeo Limited is an independent environmental consultancy established in 2006 providing specialist advice on all aspects of hydrogeology, contaminated land, risk assessment…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchNottingham City, United KingdomHQ recorded Nov 6, 20261-102 contacts →

Exact match

“Lumax Consulting is a forward thinking Civil and Environmental Engineering Consultancy.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchHigh Wycombe, United KingdomHQ recorded Nov 6, 20261-102 contacts →

Exact match

“Most of our work comes under 3 main disciplines: Consultancy: We are hydraulic, hydrological and numerical modelling specialists working within the domain of Civil Engineering -…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchBathford, United KingdomHQ recorded Nov 6, 20261-102 contacts →

Exact match

“CALM ENGINEERING is a civil engineering consultancy specialising in flood risk and water management.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchFramlingham, United KingdomHQ recorded Nov 6, 20261-102 contacts →

Exact match

“Whether it’s an abstraction licence or a ‘natural flood management’ feature; our expert knowledge of catchment hydrology, environmental water demand and water resources law, means…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchYork, United KingdomHQ recorded Nov 6, 20261-102 contacts →

Exact match

“Providing Hydrology services to help you flow through the planning system.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchChester, United KingdomHQ recorded Nov 6, 20261-101 contacts →

Exact match

“Hydrotec & Engineering Consultants Limited is an independent consultancy specialising in water and environmental issues.”

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

Showing 25 of 67 hydrology assessment services based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 266 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Hydrology assessment services based in the United Kingdom at a glance

As of Nov 6, 2026
45.4%Verified-email coverage
8.7Average contacts per company
1-10Median size (employees)
6.0%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
39
11-50
23
51-200
2
201-500
2

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 67 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 “hydrology assessment services” 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 266 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.

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 “hydrology assessment services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many hydrology assessment services are there based in the United Kingdom?

RevenueBase identified 67 company matches for hydrology assessment services 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?

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

Which city has the most hydrology assessment services?

London leads with 4 company records, followed by Bristol (3) and Glasgow (3).

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 266 professional contacts with verified work emails tracked across these 67 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.