Company lists · Data refreshed September 2026

Top 25 Wastewater treatment providers worldwide

Name: Wastewater treatment providers worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 11,375 companies tracked

RevenueBase identified 11,375 company matches for wastewater treatment providers worldwide as of September 2026 and tracks 259,471 professional contacts across them, including 69,705 with verified work emails. The United States is the largest market and Pune the largest hub.

This list covers company matches for wastewater treatment providers 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 September 22, 2026. Country and city lists for wastewater treatment providers 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 Sep 22, 2026 How this list was built

11,375Companies

259,471Contacts tracked

69,705Verified emails

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The 25 largest wastewater treatment providers worldwide

Ranked by team size

Top 25 of 11,375 company matches for wastewater treatment providers worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 22, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	SUEZ	Exact match	Paris, FranceHQ recorded Sep 22, 2026	10001+	21,549 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 · Sep 22, 2026 · View company records in RevenueBase
2	Sabesp	Exact match	Sao Paulo, BrazilHQ recorded Sep 22, 2026	10001+	10,050 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 · Sep 22, 2026 · View company records in RevenueBase
3	GFL Environmental INC	Exact match	Vaughan, ON, CanadaHQ recorded Sep 22, 2026	10001+	6,179 contacts →
	Exact match “GFL Environmental is the only major diversified environmental services company in North America offering services in solid waste management, liquid waste management and soil…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
4	Thames Water	Exact match	Reading, United KingdomHQ recorded Sep 22, 2026	1,001-5,000	5,648 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 · Sep 22, 2026 · View company records in RevenueBase
5	Severn Trent	Exact match	Coventry, United KingdomHQ recorded Sep 22, 2026	5,001-10,000	5,563 contacts →
	Exact match “Water is wonderful.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
6	ION Exchange India LTD	Exact match	Mumbai, IndiaHQ recorded Sep 22, 2026	1,001-5,000	3,810 contacts →
	Exact match “At Ion Exchange India, we bring you total environment solutions - water treatment, liquid waste treatment & recycle, air pollution control, solid & hazardous waste management and…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
7	RE Sustainability Limited	Exact match	Hyderabad, IndiaHQ recorded Sep 22, 2026	10001+	2,607 contacts →
	Exact match “Re Sustainability Limited (RE), a KKR-backed company, is one of Asia’s leading providers of comprehensive environment management services.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
8	Brown And Caldwell	Exact match	Walnut Creek, CA, United StatesHQ recorded Sep 22, 2026	1,001-5,000	2,473 contacts →
	Exact match “Headquartered in Walnut Creek, Calif, Brown and Caldwell is an employee-owned firm with 2,100+ professionals serving clients locally and globally from 52 locations.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
9	VA Tech Wabag LTD	Exact match	Wabag House, IndiaHQ recorded Sep 22, 2026	1,001-5,000	2,375 contacts →
	Exact match “WABAG, a global leader in the water industry, is backed by rich experience spanning over 100 years.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
10	Carollo Engineers	Exact match	Walnut Creek, CA, United StatesHQ recorded Sep 22, 2026	1,001-5,000	1,718 contacts →
	Exact match “For more than 90 years, Carollo Engineers has been dedicated exclusively to water and wastewater solutions.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
11	SEAAL	Exact match	Alger, AlgeriaHQ recorded Sep 22, 2026	5,001-10,000	1,543 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 · Sep 22, 2026 · View company records in RevenueBase
12	MPW Industrial Services	Exact match	Hebron, OH, PalestineHQ recorded Sep 22, 2026	1,001-5,000	1,485 contacts →
	Exact match “As the leading provider of integrated, technology-based industrial cleaning, water purification, facility management, and total waste services in North America, MPW assists in…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
13	Chemtreat	Exact match	Glen Allen, VA, United StatesHQ recorded Sep 22, 2026	1,001-5,000	1,404 contacts →
	Exact match “At ChemTreat, we understand that water is a vital resource for our planet.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
14	Kurita Group	Exact match	Tokyo, JapanHQ recorded Sep 22, 2026	5,001-10,000	1,360 contacts →
	Exact match “For more than 70 years, since its founding in 1949, Kurita Water Industries has been consistently operating in two areas of "water and the environment." Kurita Group provides…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
15	Wssc Water	Exact match	Laurel, MD, United StatesHQ recorded Sep 22, 2026	1,001-5,000	1,288 contacts →
	Exact match “Established in 1918, WSSC Water is currently among the largest water and wastewater utilities in the nation, with a network of nearly miles of drinking water pipeline and over…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
16	Volvo Eicher Commerical Vehical Limited	Exact match	Dhar, IndiaHQ recorded Sep 22, 2026	n/a	1,196 contacts →
	Exact match “Volvo Eicher Commerical Vehical Limited Service Provider of waste water recycling systems, drinking water plant & industrial water treatment in Indore, Madhya Pradesh.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
17	Watercare Services Limited	Exact match	Auckland, New ZealandHQ recorded Sep 22, 2026	1,001-5,000	1,116 contacts →
	Exact match “At Watercare we’re proud to provide a lifeline service to the people of Auckland, while protecting the environment for future generations.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
18	Urban Utilities	Exact match	Fortitude Valley, AustraliaHQ recorded Sep 22, 2026	1,001-5,000	1,064 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
19	Inframark	Exact match	Horsham, PA, United StatesHQ recorded Sep 22, 2026	1,001-5,000	973 contacts →
	Exact match “As an Azuria owned company, Inframark is a widely recognized leader in Water Infrastructure Operations and Infrastructure Management Services.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
20	SIAAP	Exact match	Paris, FranceHQ recorded Sep 22, 2026	1,001-5,000	968 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
21	Aquafin	Exact match	Aartselaar, BelgiumHQ recorded Sep 22, 2026	1,001-5,000	920 contacts →
	Exact match “Aquafin is in 1990 opgericht door het Vlaamse Gewest om de rioolwaterzuiveringsinfrastructuur in Vlaanderen verder uit te bouwen, te exploiteren en te financieren.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
22	Séché Environnement	Exact match	Changé, FranceHQ recorded Sep 22, 2026	5,001-10,000	882 contacts →
	Exact match “Séché Environnement is an agile, high performing company that draws its strength from the breadth of its different business lines.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
23	MWH Treatment	Exact match	Stockport, United KingdomHQ recorded Sep 22, 2026	1,001-5,000	879 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
24	Chem-Aqua, INC	Exact match	Wilmington, DE, United StatesHQ recorded Sep 22, 2026	10001+	864 contacts →
	Exact match “Chem-Aqua is a unique combination of knowledge, experience and stability.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
25	OVIVO	Exact match	Montreal, QC, CanadaHQ recorded Sep 22, 2026	501-1,000	829 contacts →
	Exact match “Ovivo is a powerful global brand, uniting world-renowned trademarks and a highly specialized team of 700 water treatment experts operating across the globe.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “wastewater treatment providers”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 11,375 wastewater treatment providers worldwide

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Wastewater treatment providers worldwide at a glance

As of Sep 22, 2026

26.9%Verified-email coverage

22.8Average contacts per company

11-50Median size (employees)

1.0%Largest-city concentration · Pune

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

4,369

11-50

4,209

51-200

1,811

201-500

531

501-1,000

161

1,001-5,000

138

5,001-10,000

10001+

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 wastewater treatment providers are linked below.
What qualifies: Company records worldwide whose business descriptions match “wastewater treatment providers” 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 69,705 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 September 22, 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.

Wastewater treatment providers by location

44 lists · largest first

Every Wastewater treatment providers 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 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 “wastewater treatment providers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many wastewater treatment providers are there worldwide?

RevenueBase identified 11,375 company matches for wastewater treatment providers worldwide as of September 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 wastewater treatment providers?

The United States leads with 2,011 companies, followed by India (1,200) and Brazil (585). Every wastewater treatment providers list by country and city is linked on this page.

Which city has the most wastewater treatment providers?

Pune leads with 118 company records, followed by Ahmedabad (88) and Chennai (84).

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 69,705 professional contacts with verified work emails tracked across these 11,375 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 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 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.