Company lists · Data refreshed September 2026

Top 25 Activated sludge treatment providers worldwide

RevenueBase identified 2,171 company matches for activated sludge treatment providers worldwide as of September 2026 and tracks 23,563 professional contacts across them, including 5,994 with verified work emails. India is the largest market and Pune the largest hub.

This list covers company matches for activated sludge 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 19, 2026. Country and city lists for activated sludge 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 19, 2026 How this list was built
2,171Companies
23,563Contacts tracked
5,994Verified emails
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The 25 largest activated sludge treatment providers worldwide

Ranked by team size
Top 25 of 2,171 company matches for activated sludge treatment providers worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchSalt Lake City, UT, United StatesHQ recorded Sep 19, 2026501-1,000554 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 19, 2026 · View company records in RevenueBase
2Exact matchWespelaar, FranceHQ recorded Sep 19, 2026201-500411 contacts →

Exact match

“Waterleau is your partner in sustainable water stewardship.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3Exact matchDelhi, IndiaHQ recorded Sep 19, 2026501-1,000323 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4Exact matchBerching, United Arab EmiratesHQ recorded Sep 19, 20261,001-5,000254 contacts →

Exact match

“HUBER is a globally operating company with over employees, of which around work at the headquarters in Berching (Germany).”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
5Exact matchDenver, NC, United StatesHQ recorded Sep 19, 2026201-500243 contacts →

Exact match

“HUBER Technology, LLC, the U.S.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
6Exact matchAdelaide, AustraliaHQ recorded Sep 19, 2026201-500217 contacts →

Exact match

“Company Overview: TRILITY is an established industry leader, dedicated in the delivery of water, wastewater, reuse and bio-solids solutions across Australia and New Zealand’s…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7Exact matchLoves Park, IL, United StatesHQ recorded Sep 19, 202651-200207 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8Exact matchMinneapolis, MN, United StatesHQ recorded Sep 19, 2026201-500195 contacts →

Exact match

“Formed in 2017 following the consolidation of independent water treatment solution providers Emefcy and RWL Water, Fluence Corporation was established with the vision of becoming…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9Exact matchPune, IndiaHQ recorded Sep 19, 2026201-500191 contacts →

Exact match

“HNB ENGINEERS PVT.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10Exact matchCoraopolis, PA, United StatesHQ recorded Sep 19, 2026201-500185 contacts →

Exact match

“Newterra designs, engineers, manufactures, and services environmental, water and wastewater treatment solutions that assure great performance, superb reliability, and the highest…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11Exact matchSingapore, United StatesHQ recorded Sep 19, 2026201-500179 contacts →

Exact match

“Together with our customers, BW Water, now part of De Nora Water Technologies, is committed to addressing the world's most critical water challenges.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12Exact matchBilbao-bilbo, SpainHQ recorded Sep 19, 202651-200173 contacts →

Exact match

“We specialize in the design, construction, and operation of water treatment facilities.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13Exact matchLenexa, KS, United StatesHQ recorded Sep 19, 2026201-500172 contacts →

Exact match

“S&L delivers long-lasting, reliable and easy-to-operate wastewater pumping and treatment systems for municipal, federal, and industrial-commercial applications.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14Exact matchSeclin, FranceHQ recorded Sep 19, 202651-200155 contacts →

Exact match

“Traitement des Eaux Industrielles et Lixiviats Location de Matériel et Prestations d'Exploitation Industry wastewater and Leachate treatment Equipment rental and operation…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15Exact matchAarbergen, GermanyHQ recorded Sep 19, 20261,001-5,000153 contacts →

Exact match

“Water is becoming one of the defining challenges of our century.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16Exact matchSydney Olympic Park, AustraliaHQ recorded Sep 19, 2026201-500147 contacts →

Exact match

“At Atlan Stormwater, we draw on more than 45 years’ experience in the design, testing and manufacture of water treatment systems that are utilised in over 45 countries.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17Exact matchAjman, United Arab EmiratesHQ recorded Sep 19, 2026201-500138 contacts →

Exact match

“Moalajah is a leading company providing water and waste-water services to its clients in UAE.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18Exact matchCoventry, United KingdomHQ recorded Sep 19, 20261,001-5,000137 contacts →

Exact match

“Severn Trent Services offer a range of services to municipal and industrial clients, including the Ministry of Defence and the Coal Authority, for design, build and operation of…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19Exact matchHyderabad, IndiaHQ recorded Sep 19, 2026201-500133 contacts →

Exact match

“Euroteck Environmental Pvt.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20Exact matchAnaheim, CA, United StatesHQ recorded Sep 19, 202651-200133 contacts →

Exact match

“Tomorrow Water is an innovative environmental solutions company specializing in both wastewater and organic waste treatment.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21Exact matchBarueri, BrazilHQ recorded Sep 19, 202651-200121 contacts →

Exact match

“A Attend Ambiental é fruto da parceria entre: • a Sabesp, uma das maiores empresas de saneamento do mundo, e • a Latte Saneamento, maior empresa de serviços ambientais do Brasil.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22Exact matchVinhedo, BrazilHQ recorded Sep 19, 202651-200116 contacts →

Exact match

“A B&F Dias é referência mundial em soluções para tratamento de águas e efluentes.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23Exact matchNew Delhi, IndiaHQ recorded Sep 19, 202651-200115 contacts →

Exact match

“BioPetroClean™: Revolutionizing Wastewater Treatment BioPetroClean™ is a leading cleantech company dedicated to transforming wastewater treatment through innovation and technology.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24Exact matchNoyal Sur Vilaine, FranceHQ recorded Sep 19, 202651-200113 contacts →

Exact match

“Global solutions for water and sludge treatment:#wastewater, drinking water, industrial #effluents.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25Exact matchZwingenberg, GermanyHQ recorded Sep 19, 202651-200113 contacts →

Exact match

“We from PWT Wasser- und Abwassertechnik GmbH with headquarter in Zwingenberg Germany (Close to Frankfurt am Main, Mannheim and Darmstadt) are speacialized as turnkey supplier…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase

Showing 25 of 2,171 activated sludge treatment providers worldwide

See the full list, filter by size, metro and specialty, and access 5,994 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Activated sludge treatment providers worldwide at a glance

As of Sep 19, 2026
25.4%Verified-email coverage
10.9Average contacts per company
11-50Median size (employees)
1.5%Largest-city concentration · Pune
Sep 19, 2026Page data refreshed

Companies by employee count

1-10
847
11-50
855
51-200
347
201-500
72
501-1,000
23
1,001-5,000
10
5,001-10,000
2
10001+
2

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 activated sludge treatment providers are linked below.
What qualifies
Company records worldwide whose business descriptions match “activated sludge 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 5,994 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 19, 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.

Activated sludge treatment providers by location

12 lists · largest first

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

How many activated sludge treatment providers are there worldwide?

RevenueBase identified 2,171 company matches for activated sludge 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?

Westech Engineering tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most activated sludge treatment providers?

India leads with 295 companies, followed by the United States (279) and Germany (107). Every activated sludge treatment providers list by country and city is linked on this page.

Which city has the most activated sludge treatment providers?

Pune leads with 32 company records, followed by Chennai (22) and Ahmedabad (20).

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 5,994 professional contacts with verified work emails tracked across these 2,171 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 19, 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.