Company lists · Data refreshed September 2026

Top 25 Municipal water systems based in Brazil

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

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 198 companies tracked

RevenueBase identified 198 municipal water systems headquartered in Brazil as of September 2026 and tracks 41,103 professional contacts across them, including 8,536 with verified work emails. Sao Paulo is the largest hub.

This list covers municipal water systems 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 20, 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 20, 2026 86% judged on-target in blind review

198Companies

41,103Contacts tracked

8,536Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest municipal water systems based in Brazil

Ranked by team size

Top 25 of 198 municipal water systems based in Brazil, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to municipal water systems: 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 20, 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 20, 2026
2	Aegea Saneamento	Indirect evidence	Sao Paulo, BrazilHQ checked Sep 20, 2026	10001+	3,386 contacts →
	Indirect evidence “Somos a Aegea Saneamento, empresa líder no setor.” Source: RevenueBase Database · checked Sep 20, 2026
3	Corsan	Indirect evidence	Porto Alegre, BrazilHQ checked Sep 20, 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 20, 2026
4	CEDAE	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 20, 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 20, 2026
5	Copasa	Indirect evidence	Belo Horizonte, BrazilHQ checked Sep 20, 2026	10001+	2,034 contacts →
	Indirect evidence “Página Oficial da COPASA -” Source: RevenueBase Database · checked Sep 20, 2026
6	Iguá Saneamento	Indirect evidence	São Paulo, BrazilHQ checked Sep 20, 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 20, 2026
7	Sanepar	Indirect evidence	Curitiba, BrazilHQ checked Sep 20, 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 20, 2026
8	Grupo Águas DO Brasil	Indirect evidence	Niterói, BrazilHQ checked Sep 20, 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 20, 2026
9	Companhia DE Água E Esgoto DO Ceará - Cagece	Indirect evidence	Fortaleza, BrazilHQ checked Sep 20, 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 20, 2026
10	Companhia Catarinense DE Águas E Saneamento - Casan	Indirect evidence	Florianópolis, BrazilHQ checked Sep 20, 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 20, 2026
11	RIO Saneamento	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 20, 2026	501-1,000	817 contacts →
	Indirect evidence “A Rio+Saneamento é a mais nova concessionária de água e esgoto de 18 municípios do estado do Rio de Janeiro, incluindo 24 bairros da Zona Oeste carioca, uma empresa do Grupo Águas…” Source: RevenueBase Database · checked Sep 20, 2026
12	Águas DE Manaus S.A	Indirect evidence	Manaus, BrazilHQ checked Sep 20, 2026	1,001-5,000	684 contacts →
	Indirect evidence “A Águas de Manaus é uma empresa da Aegea Saneamento, maior companhia privada do setor no país.” Source: RevenueBase Database · checked Sep 20, 2026
13	Cavo Serviços E Saneamento S.A	Indirect evidence	São Paulo, BrazilHQ checked Sep 20, 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 20, 2026
14	GS Inima Brasil	Indirect evidence	Sao Paulo, BrazilHQ checked Sep 20, 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 20, 2026
15	Companhia Águas DE Joinville Oficial	Partial evidence	Joinville, BrazilHQ checked Sep 20, 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 20, 2026
16	Ambiental Ceará	Indirect evidence	Cariri Ao Litoral, BrazilHQ checked Sep 20, 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 20, 2026
17	General Water	Partial evidence	Sao Paulo, BrazilHQ checked Sep 20, 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 20, 2026
18	Companhia DE Saneamento DE Sergipe	Indirect evidence	Aracaju, BrazilHQ checked Sep 20, 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 20, 2026
19	Cesama	Indirect evidence	Juiz De Fora, BrazilHQ checked Sep 20, 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 20, 2026
20	SAMAE	Partial evidence	Caxias Do Sul, BrazilHQ checked Sep 20, 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 20, 2026
21	Companhia Operacional DE Desenvolvimento, Saneamento E Ações Urbanas - Codau	Partial evidence	Uberaba, BrazilHQ checked Sep 20, 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 20, 2026
22	Hydrosistem Engenharia	Indirect evidence	Salvador, BrazilHQ checked Sep 20, 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 20, 2026
23	Daae Araraquara	Partial evidence	Araraquara, BrazilHQ checked Sep 20, 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 20, 2026
24	CIS	Indirect evidence	Itu, BrazilHQ checked Sep 20, 2026	501-1,000	71 contacts →
	Indirect evidence “A CIS – Companhia Ituana de Saneamento é uma entidade autárquica de Direito Público, instituída por meio da Lei 1867/2017 de autoria do prefeito de Itu, Guilherme Gazzola e…” Source: RevenueBase Database · checked Sep 20, 2026
25	EMASA	Partial evidence	Itabuna, BrazilHQ checked Sep 20, 2026	201-500	41 contacts →
	Partial evidence “Empresa Municipal de Água e Saneamento” Source: RevenueBase Database · checked Sep 20, 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 systems. 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 systems.
Partial evidence: Its own public description names part of municipal water systems, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name municipal water systems. 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 198 municipal water systems based in Brazil

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 8,536 reachable decision-makers.

Free signup · no credit card

View the full list →

Municipal water systems based in Brazil at a glance

As of Sep 20, 2026

20.8%Verified-email coverage

207.6Average contacts per company

51-200Median size (employees)

7.1%Largest-city concentration · Sao Paulo

Sep 20, 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 198 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 systems, 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 systems”. 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 systems), 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 systems, 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, 8,536 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 20, 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 systems, 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 systems are there based in Brazil?

RevenueBase identified 198 municipal water systems 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 systems?

Sao Paulo leads with 14 headquartered companies, followed by Manaus (5) and Rio De Janeiro (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 8,536 verified decision-maker contacts tracked across these 198 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 20, 2026.

Ready to reach these companies? Verified emails and direct dials for all 198 municipal water systems based in Brazil. Start with a free account, no credit card.

Download this list →

Related lists

Municipal water systems by geography

Browse the directory

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.