Company lists · Data refreshed September 2026

Top 25 Greywater treatment system construction companies worldwide

RevenueBase identified 465 greywater treatment system construction companies worldwide as of September 2026 and tracks 4,709 professional contacts across them, including 1,124 with verified work emails and 0 with mobile numbers. India is the largest market and Pune the largest hub.

This list covers greywater treatment system construction 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 15, 2026. Country and city lists for greywater treatment system construction 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 15, 2026 86% judged on-target in blind review
465Companies
4,709Contacts tracked
1,124Verified emails
0Mobile numbers
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The 25 largest greywater treatment system construction companies worldwide

Ranked by team size
Top 25 of 465 greywater treatment system construction companies worldwide, ranked by team size, largest first. Data refreshed Sep 15, 2026. RevenueBase Smart Search rates how each company's information relates to greywater treatment system construction 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceDelhi, IndiaHQ checked Sep 15, 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 15, 2026
2Partial evidencePune, IndiaHQ checked Sep 15, 2026501-1,000287 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 15, 2026
3Indirect evidenceAntalya, TürkiyeHQ checked Sep 15, 2026201-500221 contacts →

Indirect evidence

“Esli PWG Ltd.”

Source: RevenueBase Database · checked Sep 15, 2026
4Strong evidenceSydney Olympic Park, AustraliaHQ checked Sep 15, 2026201-500147 contacts →

Strong evidence

“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.”

Source: RevenueBase Database · checked Sep 15, 2026
5Indirect evidenceIstanbul, TürkiyeHQ checked Sep 15, 2026201-500120 contacts →

Indirect evidence

“Aquamatch is a Turkish company that produces sustainable water solutions for emerging markets.”

Source: RevenueBase Database · checked Sep 15, 2026
6Indirect evidenceWharton, NJ, United StatesHQ checked Sep 15, 202651-200106 contacts →

Indirect evidence

“GWTT is one of the only U.S.”

Source: RevenueBase Database · checked Sep 15, 2026
7Partial evidenceShawinigan, QC, CanadaHQ checked Sep 15, 202651-20080 contacts →

Partial evidence

“Spécialiste dans le développement et la commercialisation de systèmes avancés d'épuration des eaux usées, Bionest offre des systèmes dont les performances inégalées permettent de…”

Source: RevenueBase Database · checked Sep 15, 2026
8Strong evidenceClearwater, FL, United StatesHQ checked Sep 15, 202651-20055 contacts →

Strong evidence

“Kemco Systems, a CECO Environmental Brand, designs and manufactures energy and water conservation systems for Water Reuse/Recycle, Wastewater Treatment, Wastewater Filtration…”

Source: RevenueBase Database · checked Sep 15, 2026
9Strong evidenceBréal-sous-montfort, FranceHQ checked Sep 15, 2026201-50048 contacts →

Strong evidence

“Established in 2007, AQUATIRIS is an international network of design offices and installers specialising in eco-friendly domestic waste water treatment system.”

Source: RevenueBase Database · checked Sep 15, 2026
10Indirect evidencePune, IndiaHQ checked Sep 15, 202651-20048 contacts →

Indirect evidence

“Apex Ecotech Limited (formerly known as Apex Ecotech Private Limited) was established in 2009 by a group of dedicated professionals and has emerged as a leading provider of…”

Source: RevenueBase Database · checked Sep 15, 2026
11Strong evidenceKirklington, United KingdomHQ checked Sep 15, 202611-5044 contacts →

Strong evidence

“The UK's market leading suppliers of Rainwater Harvesting, Greywater Recycling, and Water Reuse Systems.”

Source: RevenueBase Database · checked Sep 15, 2026
12Partial evidenceMumbai, IndiaHQ checked Sep 15, 202651-20041 contacts →

Partial evidence

“World Water Works International Inc together with its affiliated companies is an innovator in the water & wastewater treatment industry, driven to help industrial and municipal…”

Source: RevenueBase Database · checked Sep 15, 2026
13Indirect evidenceCalgary, AB, CanadaHQ checked Sep 15, 202651-20041 contacts →

Indirect evidence

“Based in Alberta, Canada, FilterBoxx is a renowned leader in the design and supply of modular waterIntroPage and wastewater solutions for a wide array of industrial customers.”

Source: RevenueBase Database · checked Sep 15, 2026
14Partial evidenceHyderabad, IndiaHQ checked Sep 15, 202611-5036 contacts →

Partial evidence

“BlueDrop Enviro is an environmental company fully focused on the single objective of Wastewater Treatment.”

Source: RevenueBase Database · checked Sep 15, 2026
15Partial evidenceSaint-laurent, QC, CanadaHQ checked Sep 15, 202611-5035 contacts →

Partial evidence

“DESIGN / BUILT / OPERATE Mabarex is a water-treatment leader serving clients across Canada since 1983.”

Source: RevenueBase Database · checked Sep 15, 2026
16Partial evidenceGloucester, United KingdomHQ checked Sep 15, 202611-5032 contacts →

Partial evidence

“At WCSEE we collaborate closely with our clients to design and deliver reliable, robust, and future-proofed wastewater systems tailored to site specific requirements.”

Source: RevenueBase Database · checked Sep 15, 2026
17Indirect evidenceGuelph, ON, CanadaHQ checked Sep 15, 202611-5032 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 15, 2026
18Indirect evidenceNew Delhi, IndiaHQ checked Sep 15, 202651-20032 contacts →

Indirect evidence

“Hydroflux Engineering Pvt Ltd is a trusted STP plant manufacturer and ETP plant manufacturer based in Delhi & Mumbai, serving industries across North and South India.”

Source: RevenueBase Database · checked Sep 15, 2026
19Indirect evidenceKunda Park, AustraliaHQ checked Sep 15, 202651-20031 contacts →

Indirect evidence

“As the team behind the Ozzi Kleen product range, we strive to engineer, produce and maintain the highest level of quality not only for the pride we take in delivering reliable…”

Source: RevenueBase Database · checked Sep 15, 2026
20Indirect evidenceFriedberg (hessen), GermanyHQ checked Sep 15, 202651-20029 contacts →

Indirect evidence

“Anlagenbau für Wasser- und Abwassertechnik Labore / Institute / Krankenhäuser und Industrie EnviroDTS ist spezialisiert auf die komplette Abwasseraufbereitung und…”

Source: RevenueBase Database · checked Sep 15, 2026
21Strong evidenceLenexa, KS, United StatesHQ checked Sep 15, 202651-20029 contacts →

Strong evidence

“Water | Wastewater | Greywater | Stormwater BioMicrobics, SeptiTech, and Scienco/FAST manufacture integrated, sustainable, water utilization treatment systems land and sea.”

Source: RevenueBase Database · checked Sep 15, 2026
22Strong evidenceFredericton, NB, CanadaHQ checked Sep 15, 202651-20028 contacts →

Strong evidence

“ADI® Systems, an Evoqua brand, has been specializing in the design and construction of industrial wastewater treatment systems for over 35 years.”

Source: RevenueBase Database · checked Sep 15, 2026
23Strong evidenceDindigul, IndiaHQ checked Sep 15, 202651-20028 contacts →

Strong evidence

“We are a leading Water and Waste water Treatment Systems manufacturer in Dindigul,Tamil Nadu -South part of India.”

Source: RevenueBase Database · checked Sep 15, 2026
24Partial evidencePorta Westfalica, GermanyHQ checked Sep 15, 202651-20027 contacts →

Partial evidence

“ATB WATER - Small sewage treatment plants, wastewater treatment technology and sewage technology for every challenge in industry.”

Source: RevenueBase Database · checked Sep 15, 2026
25Indirect evidenceMondolfo, ItalyHQ checked Sep 15, 202651-20027 contacts →

Indirect evidence

“Professional-Technology: these simple words sum up our management strategy.”

Source: RevenueBase Database · checked Sep 15, 2026

Showing 25 of 465 greywater treatment system construction companies worldwide

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Greywater treatment system construction companies worldwide at a glance

As of Sep 15, 2026
23.9%Verified-email coverage
10.1Average contacts per company
11-50Median size (employees)
4.5%Largest-city concentration · Pune
Sep 15, 2026Page data refreshed

Companies by employee count

1-10
210
11-50
176
51-200
60
201-500
11
501-1,000
3
10001+
1

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 greywater treatment system construction 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
9 countries, largest first: India, the United States, France, the United Kingdom, Türkiye, Germany, Australia, Italy, Canada. Country and city lists for greywater treatment system construction companies are linked below.
What qualifies
Companies worldwide whose own description of what they do matches “greywater treatment system construction 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 greywater treatment system construction 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 greywater treatment system construction 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, 1,124 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 15, 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.

Greywater treatment system construction companies by location

9 lists · largest first

Every Greywater treatment system construction companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

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 greywater treatment system construction 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 greywater treatment system construction companies are there worldwide?

RevenueBase identified 465 greywater treatment system construction 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?

Enviro Infra Engineers LTD, headquartered in Delhi, tops this list with the largest team on record.

Which country has the most greywater treatment system construction companies?

India leads with 122 companies, followed by the United States (108) and France (42). Every greywater treatment system construction companies list by country and city is linked on this page.

Which city has the most greywater treatment system construction companies?

Pune leads with 21 headquartered companies, followed by Chennai (12) and Istanbul (9).

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 1,124 verified decision-maker contacts tracked across these 465 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 15, 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.