Company lists · Data refreshed September 2026

Top 25 Municipal water utilities based in Brazil

Name: Municipal water utilities based in Brazil
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 261 companies tracked

RevenueBase identified 261 municipal water utilities headquartered in Brazil as of September 2026 and tracks 39,597 professional contacts across them, including 8,098 with verified work emails. Sao Paulo is the largest hub.

This list covers municipal water utilities headquartered in Brazil, 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

261Companies

39,597Contacts tracked

8,098Verified emails

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The 25 largest municipal water utilities based in Brazil

Ranked by team size

Top 25 of 261 municipal water utilities based in Brazil, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to municipal water utilities: 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	Sabesp	Strong evidence	Sao Paulo, BrazilHQ checked Sep 17, 2026	10001+	10,050 contacts →
	Strong 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 17, 2026
2	Aegea Saneamento	Indirect evidence	Sao Paulo, BrazilHQ checked Sep 17, 2026	10001+	3,386 contacts →
	Indirect evidence “Somos a Aegea Saneamento, empresa líder no setor.” Source: RevenueBase Database · checked Sep 17, 2026
3	Corsan	Indirect evidence	Porto Alegre, BrazilHQ checked Sep 17, 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 17, 2026
4	CEDAE	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 17, 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 17, 2026
5	Copasa	Indirect evidence	Belo Horizonte, BrazilHQ checked Sep 17, 2026	10001+	2,034 contacts →
	Indirect evidence “Página Oficial da COPASA -” Source: RevenueBase Database · checked Sep 17, 2026
6	Iguá Saneamento	Indirect evidence	São Paulo, BrazilHQ checked Sep 17, 2026	1,001-5,000	1,905 contacts →
	Indirect evidence “A Iguá Saneamento é uma das maiores empresas de saneamento do Brasil, com operações em 120 municípios de Alagoas, Mato Grosso, Paraná, Rio de Janeiro, São Paulo e Sergipe.” Source: RevenueBase Database · checked Sep 17, 2026
7	Sanepar	Indirect evidence	Curitiba, BrazilHQ checked Sep 17, 2026	5,001-10,000	1,736 contacts →
	Indirect evidence “Visão e Missão Nossa Visão Consolidar a Sanepar como empresa pública, comprometida com a universalização do acesso aos serviços de saneamento ambiental.” Source: RevenueBase Database · checked Sep 17, 2026
8	Grupo Águas DO Brasil	Indirect evidence	Niterói, BrazilHQ checked Sep 17, 2026	1,001-5,000	1,334 contacts →
	Indirect evidence “Fundado em 1998, o Grupo Águas do Brasil é um dos principais grupos privados de saneamento básico do país, presente em 32 municípios nos estados do Rio de Janeiro, Minas Gerais e…” Source: RevenueBase Database · checked Sep 17, 2026
9	Companhia DE Água E Esgoto DO Ceará - Cagece	Indirect evidence	Fortaleza, BrazilHQ checked Sep 17, 2026	1,001-5,000	1,202 contacts →
	Indirect evidence “A Companhia de Água e Esgoto do Ceará (Cagece), fundada em 1971, é uma empresa de economia mista com capital aberto que tem por finalidade a prestação dos serviços de…” Source: RevenueBase Database · checked Sep 17, 2026
10	Companhia Catarinense DE Águas E Saneamento - Casan	Indirect evidence	Florianópolis, BrazilHQ checked Sep 17, 2026	1,001-5,000	955 contacts →
	Indirect evidence “A Companhia Catarinense de Águas e Saneamento (CASAN) é uma empresa pública de economia mista e de capital aberto, que atua como concessionária do setor de saneamento por meio de…” Source: RevenueBase Database · checked Sep 17, 2026
11	Cavo Serviços E Saneamento S.A	Indirect evidence	São Paulo, BrazilHQ checked Sep 17, 2026	1,001-5,000	486 contacts →
	Indirect evidence “Fazer o melhor sempre: o atendimento e a superação das expectativas dos clientes e da sociedade para garantir a perenidade dos serviços prestados.* Gerar valor para clientes e…” Source: RevenueBase Database · checked Sep 17, 2026
12	GS Inima Brasil	Indirect evidence	Sao Paulo, BrazilHQ checked Sep 17, 2026	1,001-5,000	439 contacts →
	Indirect evidence “A GS Inima Brasil é uma das maiores e mais respeitadas companhias privadas de saneamento do país, oferecendo soluções inovadoras e integradas.” Source: RevenueBase Database · checked Sep 17, 2026
13	Sanasa Campinas	Indirect evidence	Campinas, BrazilHQ checked Sep 17, 2026	1,001-5,000	421 contacts →
	Indirect evidence “Sanasa Campinas is an environmental services company based out of Av Da Saudade, 500, Terreo, Campinas, São Paulo, Brazil.” Source: RevenueBase Database · checked Sep 17, 2026
14	Companhia Águas DE Joinville Oficial	Partial evidence	Joinville, BrazilHQ checked Sep 17, 2026	201-500	407 contacts →
	Partial evidence “A Companhia Águas de Joinville (CAJ) é uma empresa pública de saneamento básico da prefeitura municipal da cidade.” Source: RevenueBase Database · checked Sep 17, 2026
15	Ambiental Ceará	Indirect evidence	Cariri Ao Litoral, BrazilHQ checked Sep 17, 2026	501-1,000	283 contacts →
	Indirect evidence “A Ambiental Ceará é a de esgoto da Cagece, a maior do país no setor de saneamento básico, e chega para somar na vida do cearense, ficando responsável pela ampliação, operação e…” Source: RevenueBase Database · checked Sep 17, 2026
16	General Water	Partial evidence	Sao Paulo, BrazilHQ checked Sep 17, 2026	201-500	221 contacts →
	Partial evidence “A General Water é a principal concessionária particular de água do Brasil, com foco em operações nas regiões Sudeste, Centro-Oeste e Nordeste do país.” Source: RevenueBase Database · checked Sep 17, 2026
17	Conasa Águas DO Sertão	Indirect evidence	Penedo, BrazilHQ checked Sep 17, 2026	201-500	211 contacts →
	Indirect evidence “A Conasa Águas do Sertão nasce com o compromisso de contribuir com a qualidade de vida da população de 40 municípios do interior de Alagoas, por meio prestação de serviços de…” Source: RevenueBase Database · checked Sep 17, 2026
18	Companhia DE Saneamento DE Sergipe	Indirect evidence	Aracaju, BrazilHQ checked Sep 17, 2026	1,001-5,000	210 contacts →
	Indirect evidence “Somos a Companhia de Saneamento de Sergipe (Deso), empresa de economia mista, criada em 25 de agosto de 1969 e responsável por estudos, projetos e execução de serviços de…” Source: RevenueBase Database · checked Sep 17, 2026
19	Cesama	Indirect evidence	Juiz De Fora, BrazilHQ checked Sep 17, 2026	201-500	179 contacts →
	Indirect evidence “Há 60 anos, a Cesama é a empresa pública responsável pelo fornecimento de água e coleta de esgoto na cidade de Juiz de Fora - MG.” Source: RevenueBase Database · checked Sep 17, 2026
20	Manaus Ambiental S.A	Indirect evidence	Manaus, BrazilHQ checked Sep 17, 2026	201-500	177 contacts →
	Indirect evidence “A Manaus Ambiental é Águas de Manaus uma empresa da Aegea, a maior companhia brasileira de saneamento do setor privado.” Source: RevenueBase Database · checked Sep 17, 2026
21	Prolagos	Indirect evidence	São Pedro Da Aldeia, BrazilHQ checked Sep 17, 2026	201-500	161 contacts →
	Indirect evidence “A Prolagos, empresa da Aegea Saneamento, é a concessionária responsável pelos serviços de saneamento básico em cinco municípios da Região dos Lagos (Cabo Frio, Armação dos Búzios…” Source: RevenueBase Database · checked Sep 17, 2026
22	SAMAE	Partial evidence	Caxias Do Sul, BrazilHQ checked Sep 17, 2026	201-500	127 contacts →
	Partial evidence “Serviço Autônomo Municipal de Água e Esgoto (SAMAE) O SAMAE, criado pela Lei n° 1.474 de 5 de janeiro de 1966, é produto de um contexto histórico em que os serviços de saneamento…” Source: RevenueBase Database · checked Sep 17, 2026
23	Companhia Operacional DE Desenvolvimento, Saneamento E Ações Urbanas - Codau	Partial evidence	Uberaba, BrazilHQ checked Sep 17, 2026	501-1,000	105 contacts →
	Partial evidence “A Companhia Operacional de Desenvolvimento, Saneamento e Ações Urbanas (Codau) é uma autarquia municipal fundada em 7 de junho de 1966, no município de Uberaba.” Source: RevenueBase Database · checked Sep 17, 2026
24	Hydrosistem Engenharia	Indirect evidence	Salvador, BrazilHQ checked Sep 17, 2026	1,001-5,000	92 contacts →
	Indirect evidence “A Hydrosistem Engenharia é referência nacional em soluções completas de saneamento, com mais de 20 anos de atuação no gerenciamento, operação e manutenção de sistemas de…” Source: RevenueBase Database · checked Sep 17, 2026
25	Daae Araraquara	Partial evidence	Araraquara, BrazilHQ checked Sep 17, 2026	201-500	72 contacts →
	Partial evidence “O Departamento Autônomo de Água e Esgotos (Daae) é uma autarquia municipal prestadora pública de serviços de saneamento básico (água e esgotos) no município de Araraquara.” 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 utilities. 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 utilities.
Partial evidence: Its own public description names part of municipal water utilities, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name municipal water utilities. 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 261 municipal water utilities based in Brazil

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Municipal water utilities based in Brazil at a glance

As of Sep 17, 2026

20.5%Verified-email coverage

151.7Average contacts per company

11-50Median size (employees)

8.8%Largest-city concentration · Sao Paulo

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

10001+

Email recency for this list is measured worldwide rather than for Brazil, so it is reported there. Company counts and contact totals on this page are exact for Brazil, over 261 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 utilities, 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 Brazil whose own description of what they do matches “municipal water utilities”. 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 utilities), 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 utilities, and records with no verified work email. Companies headquartered outside Brazil 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, 8,098 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 utilities, 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 utilities are there based in Brazil?

RevenueBase identified 261 municipal water utilities headquartered in Brazil 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?

Sabesp, headquartered in Sao Paulo, tops this list with the largest team on record.

Which city has the most municipal water utilities?

Sao Paulo leads with 23 headquartered companies, followed by Salvador (6) and Manaus (5).

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 8,098 verified decision-maker contacts tracked across these 261 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.