Company lists · Data refreshed November 2026

Top 25 Water system operators worldwide

RevenueBase identified 2,436 company matches for water system operators worldwide as of November 2026 and tracks 222,179 professional contacts across them, including 67,973 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers company matches for water system operators worldwide, 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. Country and city lists for water system operators follow the table.

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
2,436Companies
222,179Contacts tracked
67,973Verified emails
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The 25 largest water system operators worldwide

Ranked by team size
Top 25 of 2,436 company matches for water system operators worldwide, 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 matchParis, FranceHQ recorded Nov 6, 202610001+23,115 contacts →

Exact match

“We provide essential services in the water and waste sectors to preserve resources and improve quality of life wherever we operate.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchSao Paulo, BrazilHQ recorded Nov 6, 202610001+11,763 contacts →

Exact match

“Sabesp is a mixed capital company that was founded in 1973 and is currently responsible for supplying water and collecting and treating sewage in the 375 municipalities of São…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact 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
4Exact 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
5Exact matchParramatta, AustraliaHQ recorded Nov 6, 20261,001-5,0003,922 contacts →

Exact match

“We deliver essential and sustainable water services for the benefit of the community.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchIssy-les-moulineaux, FranceHQ recorded Nov 6, 202610001+3,921 contacts →

Exact match

“As a pure player in water and essential services, Saur works to protect the environment in the heart of the territories it serves.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchSao Paulo, BrazilHQ recorded Nov 6, 202610001+3,778 contacts →

Exact match

“Somos a Aegea Saneamento, empresa líder no setor.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact 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
9Exact matchBrazilHQ recorded Nov 6, 20265,001-10,0003,589 contacts →

Exact match

“A BRK é uma das maiores empresas privadas de saneamento do país e está presente em 13 estados e mais de 100 municípios, beneficiando a vida de mais de 16 milhões de pessoas.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchPorto Alegre, BrazilHQ recorded Nov 6, 20261,001-5,0003,169 contacts →

Exact match

“Atendendo a mais de 6,5 milhões de clientes, a Corsan é responsável pelo saneamento básico em 317 cidades do Rio Grande do Sul.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchCamden, NJ, United StatesHQ recorded Nov 6, 20265,001-10,0003,062 contacts →

Exact match

“American Water (NYSE: AWK) is the largest regulated water and wastewater utility company in the United States.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchRio De Janeiro, BrazilHQ recorded Nov 6, 20261,001-5,0002,659 contacts →

Exact match

“Constituída oficialmente em 1º de agosto de 1975, a Companhia Estadual de Águas e Esgotos (CEDAE) é oriunda da fusão da Empresa de Águas do Estado da Guanabara (CEDAG), da Empresa…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchBelo Horizonte, BrazilHQ recorded Nov 6, 202610001+2,152 contacts →

Exact match

“Página Oficial da COPASA -”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchDublin, IrelandHQ recorded Nov 6, 20261,001-5,0002,046 contacts →

Exact match

“We are Uisce Éireann.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact 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
16Exact matchZwolle, NetherlandsHQ recorded Nov 6, 20261,001-5,0001,811 contacts →

Exact match

“Vitens is het grootste drinkwaterbedrijf van Nederland.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact 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
18Exact matchLa Pintana, ChileHQ recorded Nov 6, 20261,001-5,0001,703 contacts →

Exact match

“Nuestra gestión se sustenta en altos estándares de profesionalismo y experiencia que nos permite entregar un servicio de gran calidad, cautelando la sostenibilidad de los recursos…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchQuezon City, PhilippinesHQ recorded Nov 6, 20261,001-5,0001,679 contacts →

Exact match

“Manila Water Company, Inc.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchAlger, AlgeriaHQ recorded Nov 6, 20265,001-10,0001,656 contacts →

Exact match

“La Société des Eaux et de l’Assainissement d’Alger (SEAAL), est une Société Publique par actions, détenue à 70% par l’Algérienne des Eaux (ADE) et à 30% par l’Office National de…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchMadrid, SpainHQ recorded Nov 6, 20265,001-10,0001,606 contacts →

Exact match

“Aqualia es la cuarta empresa de gestión del agua de Europa y la novena del Mundo por población servida, según el último ranking de Global Water Intelligence (diciembre de 2024).”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchBryn Mawr, PA, United StatesHQ recorded Nov 6, 20261,001-5,0001,588 contacts →

Exact match

“Aqua is one of the largest U.S-based, publicly traded water and wastewater utilities, serving more than 3 million people in Illinois, Indiana, New Jersey, North Carolina…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchAmsterdam, NetherlandsHQ recorded Nov 6, 20261,001-5,0001,528 contacts →

Exact match

“Water is overal om ons heen.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchOakland, CA, United StatesHQ recorded Nov 6, 20261,001-5,0001,504 contacts →

Exact match

“East Bay Municipal Utility District is a California public utility that supplies high-quality drinking water, generates renewable energy and provides wastewater treatment and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchGaborone, BotswanaHQ recorded Nov 6, 20261,001-5,0001,492 contacts →

Exact match

“The Water Utilities Corporation (WUC) is a parastatal organisation, wholly owned by the Botswana Government.”

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

Showing 25 of 2,436 water system operators worldwide

See the full list, filter by size, metro and specialty, and access 67,973 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Water system operators worldwide at a glance

As of Nov 6, 2026
30.6%Verified-email coverage
91.2Average contacts per company
11-50Median size (employees)
0.5%Largest-city concentration · Sao Paulo
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
757
11-50
625
51-200
483
201-500
239
501-1,000
110
1,001-5,000
129
5,001-10,000
27
10001+
17

Email recency is reported on each country list linked below.

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.
Coverage
Every country. Country and city lists for water system operators are linked below.
What qualifies
Company records worldwide whose business descriptions match “water system operators” 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. 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 67,973 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 operators by location

13 lists · largest first

Every Water system operators list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

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

How many water system operators are there worldwide?

RevenueBase identified 2,436 company matches for water system operators worldwide 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?

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

Which country has the most water system operators?

The United States leads with 600 companies, followed by Brazil (163) and Germany (152). Every water system operators list by country and city is linked on this page.

Which city has the most water system operators?

Sao Paulo leads with 12 company records, followed by Madrid (6) and Naples (6).

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 67,973 professional contacts with verified work emails tracked across these 2,436 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.