Company lists · Data refreshed September 2026

Top 25 Wastewater treatment plants worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 7,650 companies tracked

RevenueBase identified 7,650 company matches for wastewater treatment plants worldwide as of September 2026 and tracks 123,917 professional contacts across them, including 28,150 with verified work emails. India is the largest market and Pune the largest hub.

This list covers company matches for wastewater treatment plants 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 plants 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

7,650Companies

123,917Contacts tracked

28,150Verified emails

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The 25 largest wastewater treatment plants worldwide

Ranked by team size

Top 25 of 7,650 company matches for wastewater treatment plants 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	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
2	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
3	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
4	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
5	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
6	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
7	Aquatech	Exact match	Canonsburg, PA, United StatesHQ recorded Sep 22, 2026	501-1,000	903 contacts →
	Exact match “Aquatech enables the world's most recognized companies to solve complex challenges in water reuse, desalination, minimal and zero liquid discharge, and critical minerals…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
8	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
9	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
10	Gradiant	Exact match	Woburn, MA, United StatesHQ recorded Sep 22, 2026	1,001-5,000	813 contacts →
	Exact match “Gradiant is a Different Kind of Water Company.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
11	Trojan Technologies	Exact match	London, ON, CanadaHQ recorded Sep 22, 2026	501-1,000	716 contacts →
	Exact match “Our Vision To continuously advance water treatment, ensuring everyone has access to clean water, globally.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
12	Promotora Ambiental S.A.B. DE C.V	Exact match	Santa María, MexicoHQ recorded Sep 22, 2026	5,001-10,000	677 contacts →
	Exact match “En Promotora Ambiental nos hemos especializado en brindar soluciones ambientales a los sectores público y privado, en los campos de comercio e industria.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
13	Ward And Burke	Exact match	Kilcolgan, IrelandHQ recorded Sep 22, 2026	1,001-5,000	632 contacts →
	Exact match “Since its establishment, Ward & Burke has sought to develop and adopt the ideals and aspirations to civil engineering construction and currently delivers class leading, reliable…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
14	Cetrel	Exact match	Camaçari, BrazilHQ recorded Sep 22, 2026	1,001-5,000	611 contacts →
	Exact match “Cetrel was formely created as an environmental protection company 40 years ago, to treat efluents and solid residues of more than 70 industries of the Camaçari Industrial Complex…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
15	Nijhuis Saur Industries	Exact match	Doetinchem, NetherlandsHQ recorded Sep 22, 2026	1,001-5,000	609 contacts →
	Exact match “Founded in 1904, Nijhuis Saur Industries provides solid and adaptive solutions for sustainable and resilient water use, energy- and resource recovery.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
16	IDE Technologies	Exact match	Kadima, IsraelHQ recorded Sep 22, 2026	501-1,000	603 contacts →
	Exact match “A world leader in water treatment solutions, IDE specializes in the development, engineering, construction and operation of enhanced desalination and industrial water treatment…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
17	Westech Engineering	Exact match	Salt Lake City, UT, United StatesHQ recorded Sep 22, 2026	501-1,000	554 contacts →
	Exact match “WesTech Engineering, LLC designs, engineers, and manufactures water and wastewater treatment process equipment for mineral, industrial, and municipal applications worldwide.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
18	AGS Water Solutions	Exact match	Paço De Arcos, PortugalHQ recorded Sep 22, 2026	51-200	502 contacts →
	Exact match “AGS – Administração e Gestão de Sistemas de Salubridade, SA focuses on the preservation of the environment, acting throughout the entire water cycle.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
19	RSE	Exact match	Inverness Highlands, United KingdomHQ recorded Sep 22, 2026	501-1,000	498 contacts →
	Exact match “RSE is a trusted clean water technology company, developing market leading products and solutions for purifying drinking water, recycling wastewater and cleaning water in…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
20	GS Inima Brasil	Exact match	Sao Paulo, BrazilHQ recorded Sep 22, 2026	1,001-5,000	439 contacts →
	Exact match “A GS Inima Brasil é uma das maiores e mais respeitadas companhias privadas de saneamento do país, oferecendo soluções inovadoras e integradas.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
21	GMB	Exact match	Opheusden, NetherlandsHQ recorded Sep 22, 2026	501-1,000	435 contacts →
	Exact match “Al ruim een halve eeuw zetten we ons in voor duurzame oplossingen op het gebied van waterkwaliteit, waterveiligheid, bio-energie en industriële bouw en infra.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
22	Grupo EP	Exact match	Guarulhos, BrazilHQ recorded Sep 22, 2026	501-1,000	434 contacts →
	Exact match “Identificamos e solucionamos problemas relacionados ao tratamento de água e efluentes, reúso, dessalinização e análises ambientais para indústrias, consultorias ambientais e…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
23	Glanua	Exact match	Galway, IrelandHQ recorded Sep 22, 2026	201-500	417 contacts →
	Exact match “Glanua is an industry leader in providing innovative and sustainable engineering solutions to design, build and deliver critical water and wastewater infrastructure across UK and…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
24	Waterleau	Exact match	Wespelaar, FranceHQ recorded Sep 22, 2026	201-500	411 contacts →
	Exact match “Waterleau is your partner in sustainable water stewardship.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
25	UCC Environmental	Exact match	Waukegan, IL, United StatesHQ recorded Sep 22, 2026	201-500	389 contacts →
	Exact match “UCC Environmental (UCC) is a global leader in environmental solutions for solids handling, wastewater treatment and pollution control technologies in power generation and other…” 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 plants”. 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 7,650 wastewater treatment plants worldwide

See the full list, filter by size, metro and specialty, and access 28,150 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Wastewater treatment plants worldwide at a glance

As of Sep 22, 2026

22.7%Verified-email coverage

16.2Average contacts per company

11-50Median size (employees)

1.5%Largest-city concentration · Pune

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

2,767

11-50

2,992

51-200

1,253

201-500

383

501-1,000

1,001-5,000

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 plants are linked below.
What qualifies: Company records worldwide whose business descriptions match “wastewater treatment plants” 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 28,150 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 plants by location

40 lists · largest first

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

How many wastewater treatment plants are there worldwide?

RevenueBase identified 7,650 company matches for wastewater treatment plants 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?

ION Exchange India LTD tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most wastewater treatment plants?

India leads with 1,159 companies, followed by the United States (866) and Brazil (433). Every wastewater treatment plants list by country and city is linked on this page.

Which city has the most wastewater treatment plants?

Pune leads with 112 company records, followed by Ahmedabad (89) and Chennai (79).

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 28,150 professional contacts with verified work emails tracked across these 7,650 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.