Company lists · Data refreshed September 2026

Top 25 Municipal wastewater treatment companies worldwide

Name: Municipal wastewater treatment companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 7,259 companies tracked

RevenueBase identified 7,259 municipal wastewater treatment companies worldwide as of September 2026 and tracks 185,157 professional contacts across them, including 49,606 with verified work emails. The United States is the largest market and Pune the largest hub.

This list covers municipal wastewater treatment 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 20, 2026. Country and city lists for municipal wastewater treatment 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 20, 2026 86% judged on-target in blind review

7,259Companies

185,157Contacts tracked

49,606Verified emails

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The 25 largest municipal wastewater treatment companies worldwide

Ranked by team size

Top 25 of 7,259 municipal wastewater treatment companies worldwide, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to municipal wastewater treatment 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	SUEZ	Indirect evidence	Paris, FranceHQ checked Sep 20, 2026	10001+	21,549 contacts →
	Indirect 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 20, 2026
2	Sabesp	Partial evidence	Sao Paulo, BrazilHQ checked Sep 20, 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 20, 2026
3	Severn Trent	Indirect evidence	Coventry, United KingdomHQ checked Sep 20, 2026	5,001-10,000	5,563 contacts →
	Indirect evidence “Water is wonderful.” Source: RevenueBase Database · checked Sep 20, 2026
4	ION Exchange India LTD	Partial evidence	Mumbai, IndiaHQ checked Sep 20, 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 20, 2026
5	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
6	BRK Ambiental	Indirect evidence	BrazilHQ checked Sep 20, 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 20, 2026
7	VA Tech Wabag LTD	Indirect evidence	Wabag House, IndiaHQ checked Sep 20, 2026	1,001-5,000	2,375 contacts →
	Indirect evidence “WABAG, a global leader in the water industry, is backed by rich experience spanning over 100 years.” Source: RevenueBase Database · checked Sep 20, 2026
8	Carollo Engineers	Partial evidence	Walnut Creek, CA, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,718 contacts →
	Partial evidence “For more than 90 years, Carollo Engineers has been dedicated exclusively to water and wastewater solutions.” Source: RevenueBase Database · checked Sep 20, 2026
9	SEAAL	Indirect evidence	Alger, AlgeriaHQ checked Sep 20, 2026	5,001-10,000	1,543 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 20, 2026
10	Manila Water	Indirect evidence	Quezon City, PhilippinesHQ checked Sep 20, 2026	1,001-5,000	1,471 contacts →
	Indirect evidence “Manila Water Company, Inc.” Source: RevenueBase Database · checked Sep 20, 2026
11	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
12	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
13	Volvo Eicher Commerical Vehical Limited	Partial evidence	Dhar, IndiaHQ checked Sep 20, 2026	n/a	1,196 contacts →
	Partial evidence “Volvo Eicher Commerical Vehical Limited Service Provider of waste water recycling systems, drinking water plant & industrial water treatment in Indore, Madhya Pradesh.” Source: RevenueBase Database · checked Sep 20, 2026
14	Urban Utilities	Partial evidence	Fortitude Valley, AustraliaHQ checked Sep 20, 2026	1,001-5,000	1,064 contacts →
	Partial evidence “We’re responsible for delivering world-class drinking water and wastewater services to the growing communities of Brisbane, Ipswich, Lockyer Valley, Somerset and Scenic Rim.” Source: RevenueBase Database · checked Sep 20, 2026
15	Inframark	Indirect evidence	Horsham, PA, United StatesHQ checked Sep 20, 2026	1,001-5,000	973 contacts →
	Indirect evidence “As an Azuria owned company, Inframark is a widely recognized leader in Water Infrastructure Operations and Infrastructure Management Services.” Source: RevenueBase Database · checked Sep 20, 2026
16	SIAAP	Indirect evidence	Paris, FranceHQ checked Sep 20, 2026	1,001-5,000	968 contacts →
	Indirect evidence “Une entreprise publique unique en Europe Son périmètre d'intervention englobe quatre départements et 180 communes reparties sur quatre autres départements, le SIAAP est - le seul…” Source: RevenueBase Database · checked Sep 20, 2026
17	Aquafin	Indirect evidence	Aartselaar, BelgiumHQ checked Sep 20, 2026	1,001-5,000	920 contacts →
	Indirect evidence “Aquafin is in 1990 opgericht door het Vlaamse Gewest om de rioolwaterzuiveringsinfrastructuur in Vlaanderen verder uit te bouwen, te exploiteren en te financieren.” Source: RevenueBase Database · checked Sep 20, 2026
18	Essbio	Indirect evidence	Concepcion, ChileHQ checked Sep 20, 2026	1,001-5,000	900 contacts →
	Indirect evidence “Essbio es la segunda empresa sanitaria más importante de Chile.” Source: RevenueBase Database · checked Sep 20, 2026
19	Séché Environnement	Indirect evidence	Changé, FranceHQ checked Sep 20, 2026	5,001-10,000	882 contacts →
	Indirect evidence “Séché Environnement is an agile, high performing company that draws its strength from the breadth of its different business lines.” Source: RevenueBase Database · checked Sep 20, 2026
20	MWH Treatment	Partial evidence	Stockport, United KingdomHQ checked Sep 20, 2026	1,001-5,000	879 contacts →
	Partial evidence “MWH Treatment is a leading Design and Build non-infrastructure solution provider in the UK water sector, with a water sector heritage dating back to 1820.” Source: RevenueBase Database · checked Sep 20, 2026
21	OVIVO	Partial evidence	Montreal, QC, CanadaHQ checked Sep 20, 2026	501-1,000	829 contacts →
	Partial evidence “Ovivo is a powerful global brand, uniting world-renowned trademarks and a highly specialized team of 700 water treatment experts operating across the globe.” Source: RevenueBase Database · checked Sep 20, 2026
22	Yarra Valley Water	Indirect evidence	Melbourne, AustraliaHQ checked Sep 20, 2026	501-1,000	821 contacts →
	Indirect evidence “We service 2 million people and businesses across a area, from Wallan in the north to Warburton in the east.” Source: RevenueBase Database · checked Sep 20, 2026
23	Gradiant	Indirect evidence	Woburn, MA, United StatesHQ checked Sep 20, 2026	1,001-5,000	813 contacts →
	Indirect evidence “Gradiant is a Different Kind of Water Company.” Source: RevenueBase Database · checked Sep 20, 2026
24	DE Watergroep	Indirect evidence	Brussel, BelgiumHQ checked Sep 20, 2026	1,001-5,000	728 contacts →
	Indirect evidence “De Watergroep is het grootste drinkwaterbedrijf in Vlaanderen.” Source: RevenueBase Database · checked Sep 20, 2026
25	Trojan Technologies	Partial evidence	London, ON, CanadaHQ checked Sep 20, 2026	501-1,000	716 contacts →
	Partial evidence “Our Vision To continuously advance water treatment, ensuring everyone has access to clean water, globally.” 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 wastewater treatment 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 municipal wastewater treatment companies.
Partial evidence: Its own public description names part of municipal wastewater treatment companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name municipal wastewater treatment 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 7,259 municipal wastewater treatment companies worldwide

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Municipal wastewater treatment companies worldwide at a glance

As of Sep 20, 2026

26.8%Verified-email coverage

25.5Average contacts per company

11-50Median size (employees)

1.3%Largest-city concentration · Pune

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

2,630

11-50

2,730

51-200

1,228

201-500

362

501-1,000

114

1,001-5,000

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 municipal wastewater treatment 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 municipal wastewater treatment companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “municipal wastewater treatment 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 municipal wastewater treatment 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 municipal wastewater treatment 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, 49,606 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.

Municipal wastewater treatment companies by location

42 lists · largest first

Every Municipal wastewater treatment 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 municipal wastewater treatment 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 municipal wastewater treatment companies are there worldwide?

RevenueBase identified 7,259 municipal wastewater treatment 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?

SUEZ, headquartered in Worldwide, tops this list with the largest team on record.

Which country has the most municipal wastewater treatment companies?

The United States leads with 1,138 companies, followed by India (885) and Brazil (357). Every municipal wastewater treatment companies list by country and city is linked on this page.

Which city has the most municipal wastewater treatment companies?

Pune leads with 91 headquartered companies, followed by Ahmedabad (69) and Tehran (55).

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 49,606 verified decision-maker contacts tracked across these 7,259 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.

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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.