Company lists · Data refreshed September 2026

Top 25 Water and sanitation companies worldwide

Name: Water and sanitation companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 10,724 companies tracked

RevenueBase identified 10,724 water and sanitation companies worldwide as of September 2026 and tracks 504,995 professional contacts across them, including 137,203 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers water and sanitation companies worldwide, 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 22, 2026. Country and city lists for water and sanitation companies follow the table.

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 22, 2026 86% judged on-target in blind review

10,724Companies

504,995Contacts tracked

137,203Verified emails

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The 25 largest water and sanitation companies worldwide

Ranked by team size

Top 25 of 10,724 water and sanitation companies worldwide, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to water and sanitation 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	Ecolab	Partial evidence	St. Paul, MN, United StatesHQ checked Sep 22, 2026	10001+	31,345 contacts →
	Partial evidence “A trusted partner for millions of customers, Ecolab (NYSE:ECL) is a global sustainability leader offering water, hygiene and infection prevention solutions and services that…” Source: RevenueBase Database · checked Sep 22, 2026
2	Veolia	Indirect evidence	Aubervilliers, FranceHQ checked Sep 22, 2026	10001+	30,019 contacts →
	Indirect evidence “Veolia, a global leader in environmental services, works every day to build environmental security for the benefit of public health and the competitiveness of industries and…” Source: RevenueBase Database · checked Sep 22, 2026
3	SUEZ	Partial evidence	Paris, FranceHQ checked Sep 22, 2026	10001+	21,549 contacts →
	Partial evidence “We provide essential services in the water and waste sectors to preserve resources and improve quality of life wherever we operate.” Source: RevenueBase Database · checked Sep 22, 2026
4	Sabesp	Partial evidence	Sao Paulo, BrazilHQ checked Sep 22, 2026	10001+	10,050 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 22, 2026
5	Pentair	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	5,001-10,000	6,636 contacts →
	Partial evidence “At Pentair, we help the world sustainably move, improve, and enjoy water, life’s most essential resource.” Source: RevenueBase Database · checked Sep 22, 2026
6	Thames Water	Partial evidence	Reading, United KingdomHQ checked Sep 22, 2026	1,001-5,000	5,648 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 22, 2026
7	Severn Trent	Partial evidence	Coventry, United KingdomHQ checked Sep 22, 2026	5,001-10,000	5,563 contacts →
	Partial evidence “Water is wonderful.” Source: RevenueBase Database · checked Sep 22, 2026
8	NWC	Partial evidence	Riyadh, Saudi ArabiaHQ checked Sep 22, 2026	10001+	5,242 contacts →
	Partial evidence “The National Water Company (a Saudi joint stock company, wholly owned by the state represented by the Public Investment Fund) was established in 2008, providing water and…” Source: RevenueBase Database · checked Sep 22, 2026
9	FCC	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	10001+	4,000 contacts →
	Indirect evidence “A citizen services sustainability-oriented Company.” Source: RevenueBase Database · checked Sep 22, 2026
10	Water Corporation	Partial evidence	Leederville, AustraliaHQ checked Sep 22, 2026	1,001-5,000	3,828 contacts →
	Partial evidence “We’re the principal supplier of water, wastewater and drainage services in Western Australia to hundreds of thousands of homes, businesses and farms, as well as providing bulk…” Source: RevenueBase Database · checked Sep 22, 2026
11	ION Exchange India LTD	Partial evidence	Mumbai, IndiaHQ checked Sep 22, 2026	1,001-5,000	3,810 contacts →
	Partial evidence “At Ion Exchange India, we bring you total environment solutions - water treatment, liquid waste treatment & recycle, air pollution control, solid & hazardous waste management and…” Source: RevenueBase Database · checked Sep 22, 2026
12	SAUR	Partial evidence	Issy-les-moulineaux, FranceHQ checked Sep 22, 2026	10001+	3,694 contacts →
	Partial evidence “As a pure player in water and essential services, Saur works to protect the environment in the heart of the territories it serves.” Source: RevenueBase Database · checked Sep 22, 2026
13	Sydney Water	Partial evidence	Parramatta, AustraliaHQ checked Sep 22, 2026	1,001-5,000	3,609 contacts →
	Partial evidence “We deliver essential and sustainable water services for the benefit of the community.” Source: RevenueBase Database · checked Sep 22, 2026
14	Coxabengoa	Partial evidence	Seville, SpainHQ checked Sep 22, 2026	10001+	3,545 contacts →
	Partial evidence “Coxabengoa is a vertically integrated global utility in water and energy at the forefront of solving the greatest global challenges of the green transition by applying…” Source: RevenueBase Database · checked Sep 22, 2026
15	Anglian Water Services	Partial evidence	Huntingdon, United KingdomHQ checked Sep 22, 2026	5,001-10,000	3,430 contacts →
	Partial evidence “Anglian Water supply water and water recycling services to more than six million domestic and business customers in the east of England and Hartlepool.” Source: RevenueBase Database · checked Sep 22, 2026
16	Aegea Saneamento	Indirect evidence	Sao Paulo, BrazilHQ checked Sep 22, 2026	10001+	3,386 contacts →
	Indirect evidence “Somos a Aegea Saneamento, empresa líder no setor.” Source: RevenueBase Database · checked Sep 22, 2026
17	BRK Ambiental	Indirect evidence	BrazilHQ checked Sep 22, 2026	5,001-10,000	3,306 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 22, 2026
18	Rand Water	Strong evidence	Glenvista, South AfricaHQ checked Sep 22, 2026	1,001-5,000	2,978 contacts →
	Strong evidence “VISION: Be a provider of sustainable, universally competitive water and sanitation solutions for Africa.” Source: RevenueBase Database · checked Sep 22, 2026
19	American Water	Partial evidence	Camden, NJ, United StatesHQ checked Sep 22, 2026	5,001-10,000	2,876 contacts →
	Partial evidence “American Water (NYSE: AWK) is the largest regulated water and wastewater utility company in the United States.” Source: RevenueBase Database · checked Sep 22, 2026
20	Corsan	Indirect evidence	Porto Alegre, BrazilHQ checked Sep 22, 2026	1,001-5,000	2,788 contacts →
	Indirect evidence “Atendendo a mais de 6,5 milhões de clientes, a Corsan é responsável pelo saneamento básico em 317 cidades do Rio Grande do Sul.” Source: RevenueBase Database · checked Sep 22, 2026
21	Scottish Water	Partial evidence	Stepps, United KingdomHQ checked Sep 22, 2026	1,001-5,000	2,776 contacts →
	Partial evidence “Water is essential to life and to the communities in which we live and work across every corner of Scotland.” Source: RevenueBase Database · checked Sep 22, 2026
22	CEDAE	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 22, 2026	1,001-5,000	2,478 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 22, 2026
23	Águas DO RIO	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 22, 2026	5,001-10,000	2,477 contacts →
	Indirect evidence “Somos a concessionária responsável pela água e esgoto em 27 municípios do estado do Rio, incluído as zonas Sul, Norte e Centro da Capital.” Source: RevenueBase Database · checked Sep 22, 2026
24	VA Tech Wabag LTD	Partial evidence	Wabag House, IndiaHQ checked Sep 22, 2026	1,001-5,000	2,375 contacts →
	Partial evidence “WABAG, a global leader in the water industry, is backed by rich experience spanning over 100 years.” Source: RevenueBase Database · checked Sep 22, 2026
25	NCH	Partial evidence	Wilmington, DE, United StatesHQ checked Sep 22, 2026	10001+	2,361 contacts →
	Partial evidence “Cleaning water, conserving energy and delivering maintenance solutions since 1919.” Source: RevenueBase Database · checked Sep 22, 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: water and sanitation 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 water and sanitation companies.
Partial evidence: Its own public description names part of water and sanitation companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name water and sanitation 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 10,724 water and sanitation companies worldwide

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Water and sanitation companies worldwide at a glance

As of Sep 22, 2026

27.2%Verified-email coverage

47.1Average contacts per company

11-50Median size (employees)

0.8%Largest-city concentration · Sao Paulo

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

3,695

11-50

3,591

51-200

1,867

201-500

735

501-1,000

311

1,001-5,000

302

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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 water and sanitation 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.
Coverage: Every country. Country and city lists for water and sanitation companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “water and sanitation 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 water and sanitation 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 water and sanitation companies, and records with no verified work email.
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, 137,203 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 22, 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.

Water and sanitation companies by location

45 lists · largest first

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

Countries

Cities

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 water and sanitation 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 water and sanitation companies are there worldwide?

RevenueBase identified 10,724 water and sanitation companies worldwide 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?

Ecolab, headquartered in St. Paul, tops this list with the largest team on record.

Which country has the most water and sanitation companies?

The United States leads with 1,303 companies, followed by India (874) and Brazil (858). Every water and sanitation companies list by country and city is linked on this page.

Which city has the most water and sanitation companies?

Sao Paulo leads with 89 headquartered companies, followed by Pune (83) and Ahmedabad (59).

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 137,203 verified decision-maker contacts tracked across these 10,724 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 22, 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.