Company lists · Data refreshed September 2026

Top 25 Effluent treatment plant construction worldwide

RevenueBase identified 4,463 effluent treatment plant construction worldwide as of September 2026 and tracks 67,263 professional contacts across them, including 15,282 with verified work emails and 0 with mobile numbers. India is the largest market and Pune the largest hub.

This list covers effluent treatment plant construction 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 16, 2026. Country and city lists for effluent treatment plant construction 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 16, 2026 86% judged on-target in blind review
4,463Companies
67,263Contacts tracked
15,282Verified emails
0Mobile numbers
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The 25 largest effluent treatment plant construction worldwide

Ranked by team size
Top 25 of 4,463 effluent treatment plant construction worldwide, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to effluent treatment plant construction: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceMumbai, IndiaHQ checked Sep 16, 20261,001-5,0003,810 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 16, 2026
2Indirect evidenceWabag House, IndiaHQ checked Sep 16, 20261,001-5,0002,375 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 16, 2026
3Strong evidenceDhar, IndiaHQ checked Sep 16, 2026n/a1,196 contacts →

Strong 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 16, 2026
4Partial evidenceMontreal, QC, CanadaHQ checked Sep 16, 2026501-1,000829 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 16, 2026
5Indirect evidenceNew Delhi, IndiaHQ checked Sep 16, 2026501-1,000628 contacts →

Indirect evidence

“JWIL Infra Limited is an EPC, Turnkey Solutions Provider Company in Water and Wastewater Sector.”

Source: RevenueBase Database · checked Sep 16, 2026
6Indirect evidenceCamaçari, BrazilHQ checked Sep 16, 20261,001-5,000611 contacts →

Indirect evidence

“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…”

Source: RevenueBase Database · checked Sep 16, 2026
7Indirect evidenceDoetinchem, NetherlandsHQ checked Sep 16, 20261,001-5,000609 contacts →

Indirect evidence

“Founded in 1904, Nijhuis Saur Industries provides solid and adaptive solutions for sustainable and resilient water use, energy- and resource recovery.”

Source: RevenueBase Database · checked Sep 16, 2026
8Partial evidenceSalt Lake City, UT, United StatesHQ checked Sep 16, 2026501-1,000554 contacts →

Partial evidence

“WesTech Engineering, LLC designs, engineers, and manufactures water and wastewater treatment process equipment for mineral, industrial, and municipal applications worldwide.”

Source: RevenueBase Database · checked Sep 16, 2026
9Indirect evidenceMumbai, IndiaHQ checked Sep 16, 20261,001-5,000536 contacts →

Indirect evidence

“We as, Rochem Separation Systems offer 100% water reuse solutions to treat industrial wastewater since 1992.”

Source: RevenueBase Database · checked Sep 16, 2026
10Indirect evidenceInverness Highlands, United KingdomHQ checked Sep 16, 2026501-1,000498 contacts →

Indirect evidence

“RSE is a trusted clean water technology company, developing market leading products and solutions for purifying drinking water, recycling wastewater and cleaning water in…”

Source: RevenueBase Database · checked Sep 16, 2026
11Indirect evidenceOpheusden, NetherlandsHQ checked Sep 16, 2026501-1,000435 contacts →

Indirect evidence

“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.”

Source: RevenueBase Database · checked Sep 16, 2026
12Indirect evidenceGuarulhos, BrazilHQ checked Sep 16, 2026501-1,000434 contacts →

Indirect evidence

“Identificamos e solucionamos problemas relacionados ao tratamento de água e efluentes, reúso, dessalinização e análises ambientais para indústrias, consultorias ambientais e…”

Source: RevenueBase Database · checked Sep 16, 2026
13Indirect evidenceWespelaar, FranceHQ checked Sep 16, 2026201-500411 contacts →

Indirect evidence

“Waterleau is your partner in sustainable water stewardship.”

Source: RevenueBase Database · checked Sep 16, 2026
14Partial evidenceWaukegan, IL, United StatesHQ checked Sep 16, 2026201-500389 contacts →

Partial evidence

“UCC Environmental (UCC) is a global leader in environmental solutions for solids handling, wastewater treatment and pollution control technologies in power generation and other…”

Source: RevenueBase Database · checked Sep 16, 2026
15Indirect evidenceGenova, ItalyHQ checked Sep 16, 202651-200362 contacts →

Indirect evidence

“Fisia Italimpianti S.p.A, part of Webuild Group (the new group born in 2020 from Salini Impregilo), is a worldwide leader in the sustainable design and execution of water…”

Source: RevenueBase Database · checked Sep 16, 2026
16Strong evidenceChennai, IndiaHQ checked Sep 16, 20265,001-10,000350 contacts →

Strong evidence

“L&T Construction's Water & Effluent Treatment business vertical provides state-of-the-art design, detailed engineering, procurement, project management, project execution…”

Source: RevenueBase Database · checked Sep 16, 2026
17Indirect evidenceBarueri, BrazilHQ checked Sep 16, 2026201-500340 contacts →

Indirect evidence

“Com mais de 40 anos de experiência, a Opersan é uma empresa brasileira que oferece ao mercado corporativo soluções completas para a gestão de águas e efluentes.”

Source: RevenueBase Database · checked Sep 16, 2026
18Partial evidenceMumbai, IndiaHQ checked Sep 16, 2026501-1,000330 contacts →

Partial evidence

“Vasu Chemicals LLP is India's leading industrial water treatment solutions provider.”

Source: RevenueBase Database · checked Sep 16, 2026
19Indirect evidenceDelhi, IndiaHQ checked Sep 16, 2026501-1,000323 contacts →

Indirect evidence

“Since 2009, Enviro has combined engineering excellence with a commitment to sustainability in water and wastewater solutions across India." Enviro Infra Engineers Limited stands…”

Source: RevenueBase Database · checked Sep 16, 2026
20Indirect evidenceSão Paulo, BrazilHQ checked Sep 16, 20261,001-5,000307 contacts →

Indirect evidence

“Com mais de 30 anos de atuação no mercado brasileiro, a Enfil é uma empresa referência em soluções ambientais para tratamento de água, efluentes e controle de emissões…”

Source: RevenueBase Database · checked Sep 16, 2026
21Indirect evidenceTlacoquemécatl, MexicoHQ checked Sep 16, 2026501-1,000305 contacts →

Indirect evidence

“En TICSA ofrecemos conocimiento y experiencia para crear soluciones innovadoras para el diseño, construcción, operación y mantenimiento de plantas de tratamiento de agua que den…”

Source: RevenueBase Database · checked Sep 16, 2026
22Partial evidenceOld Saybrook, CT, United StatesHQ checked Sep 16, 2026501-1,000295 contacts →

Partial evidence

“Protecting the environment with innovative wastewater treatment solutions for over 35 years, Infiltrator is the leading manufacturer of onsite wastewater treatment products in…”

Source: RevenueBase Database · checked Sep 16, 2026
23Partial evidenceMandeville, LA, JamaicaHQ checked Sep 16, 2026201-500290 contacts →

Partial evidence

“For over 96 years, MECO has been a world leader in designing and constructing engineered solutions for water purification.”

Source: RevenueBase Database · checked Sep 16, 2026
24Strong evidencePune, IndiaHQ checked Sep 16, 2026501-1,000287 contacts →

Strong evidence

“WTE is a globally recognised manufacturer & exporter of innovative Water & Wastewater Treatment Plants.”

Source: RevenueBase Database · checked Sep 16, 2026
25Indirect evidenceCapinzal, BrazilHQ checked Sep 16, 2026201-500275 contacts →

Indirect evidence

“Somos uma das principais indústrias do segmento metalmecânico, com sede em Santa Catarina e atuação internacional.”

Source: RevenueBase Database · checked Sep 16, 2026

Showing 25 of 4,463 effluent treatment plant construction worldwide

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Effluent treatment plant construction worldwide at a glance

As of Sep 16, 2026
22.7%Verified-email coverage
15.1Average contacts per company
11-50Median size (employees)
2.4%Largest-city concentration · Pune
Sep 16, 2026Page data refreshed

Companies by employee count

1-10
1,536
11-50
1,858
51-200
760
201-500
188
501-1,000
51
1,001-5,000
24
5,001-10,000
6
10001+
10

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 effluent treatment plant construction, 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
29 countries, largest first: India, the United States, Brazil, Italy, Germany, Türkiye, the United Kingdom, Spain, France, Mexico and 19 more. Country and city lists for effluent treatment plant construction are linked below.
What qualifies
Companies worldwide whose own description of what they do matches “effluent treatment plant construction”. 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 effluent treatment plant construction), 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 effluent treatment plant construction, 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, 15,282 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 16, 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.

Effluent treatment plant construction by location

33 lists · largest first

Every Effluent treatment plant construction 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 effluent treatment plant construction, 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 effluent treatment plant construction are there worldwide?

RevenueBase identified 4,463 effluent treatment plant construction 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?

ION Exchange India LTD, headquartered in Mumbai, tops this list with the largest team on record.

Which country has the most effluent treatment plant construction?

India leads with 1,095 companies, followed by the United States (488) and Brazil (407). Every effluent treatment plant construction list by country and city is linked on this page.

Which city has the most effluent treatment plant construction?

Pune leads with 106 headquartered companies, followed by Chennai (78) and Ahmedabad (74).

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 15,282 verified decision-maker contacts tracked across these 4,463 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 16, 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.