Company lists · Data refreshed September 2026

Top 25 Wastewater treatment biogas companies based in India

Name: Wastewater treatment biogas companies based in India
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 368 companies tracked

RevenueBase identified 368 wastewater treatment biogas companies headquartered in India as of September 2026 and tracks 3,893 professional contacts across them, including 371 with verified work emails. Pune is the largest hub.

This list covers wastewater treatment biogas companies headquartered in India, 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 22, 2026.

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 22, 2026 86% judged on-target in blind review

368Companies

3,893Contacts tracked

371Verified emails

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The 25 largest wastewater treatment biogas companies based in India

Ranked by team size

Top 25 of 368 wastewater treatment biogas companies based in India, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to wastewater treatment biogas 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Enviro Infra Engineers LTD	Partial evidence	Delhi, IndiaHQ checked Sep 22, 2026	501-1,000	323 contacts →
	Partial 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 22, 2026
2	WTE Infra Projects Pvt. LTD	Strong evidence	Pune, IndiaHQ checked Sep 22, 2026	501-1,000	287 contacts →
	Strong evidence “WTE is a globally recognised manufacturer & exporter of innovative Water & Wastewater Treatment Plants.” Source: RevenueBase Database · checked Sep 22, 2026
3	Reliance Industries Limited	Partial evidence	Vadodara, IndiaHQ checked Sep 22, 2026	n/a	282 contacts →
	Partial evidence “Manufacturers of all types of power plants, gas cracker plants, project plannings, erections, commissionings, operations, waste water treatment systems etc.” Source: RevenueBase Database · checked Sep 22, 2026
4	Membrane Group India Pvt. LTD	Indirect evidence	Gurgaon, IndiaHQ checked Sep 22, 2026	201-500	167 contacts →
	Indirect evidence “Water is life.” Source: RevenueBase Database · checked Sep 22, 2026
5	BIO Petro Clean	Strong evidence	New Delhi, IndiaHQ checked Sep 22, 2026	51-200	115 contacts →
	Strong evidence “BioPetroClean™: Revolutionizing Wastewater Treatment BioPetroClean™ is a leading cleantech company dedicated to transforming wastewater treatment through innovation and technology.” Source: RevenueBase Database · checked Sep 22, 2026
6	Saurashtra Enviro Projects PVT Ltd, A Detox Group Company	Partial evidence	Surat, IndiaHQ checked Sep 22, 2026	201-500	72 contacts →
	Partial evidence “Municipal & industrial waste management plants, legacy waste treatment and bioremediation, Industrial effluent and sewage treatment plants with complete ZLD scheme, suppliers of…” Source: RevenueBase Database · checked Sep 22, 2026
7	Apex Ecotech Limited	Indirect evidence	Pune, IndiaHQ checked Sep 22, 2026	51-200	48 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 22, 2026
8	SUN Enviro Technologies Pvt. LTD	Strong evidence	Nagpur, IndiaHQ checked Sep 22, 2026	51-200	48 contacts →
	Strong evidence “We are delighted to introduce ourselves as Sun Enviro Technologies Pvt Ltd, a leading provider of wastewater treatment plants, water treatment plants, water recycle plants, sewage…” Source: RevenueBase Database · checked Sep 22, 2026
9	Concord Enviro Systems Limited	Partial evidence	Mumbai, IndiaHQ checked Sep 22, 2026	1,001-5,000	46 contacts →
	Partial evidence “We as, Concord Enviro are a global company offering 100% water reuse solutions to treat industrial wastewater.” Source: RevenueBase Database · checked Sep 22, 2026
10	GGE Genset PVT LTD	Partial evidence	Delhi, IndiaHQ checked Sep 22, 2026	51-200	46 contacts →
	Partial evidence “As one of India’s largest Biogas equipment supplier, We offers equipment ranging from Gas Gensets, Bio-CNG Up-gradation Equipment, Epoxy and Glass Coated Digester Tanks, Gas…” Source: RevenueBase Database · checked Sep 22, 2026
11	Mailhem Environment Pvt. LTD	Indirect evidence	Pune, IndiaHQ checked Sep 22, 2026	51-200	45 contacts →
	Indirect evidence “Mailhem Ikos aims to be a one-stop solution to all waste management problems.” Source: RevenueBase Database · checked Sep 22, 2026
12	World Water Works International	Strong evidence	Mumbai, IndiaHQ checked Sep 22, 2026	51-200	41 contacts →
	Strong 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 22, 2026
13	Vision Earthcare	Indirect evidence	Mumbai, IndiaHQ checked Sep 22, 2026	11-50	41 contacts →
	Indirect evidence “VEC is company Incubated at SINE IIT Bombay.” Source: RevenueBase Database · checked Sep 22, 2026
14	Felix Industries Limited	Indirect evidence	Ahmedabad, IndiaHQ checked Sep 22, 2026	51-200	39 contacts →
	Indirect evidence “Felix Industries Limited is a water and waste water recycling and management company based out of Ahmedabad, Gujarat, India.” Source: RevenueBase Database · checked Sep 22, 2026
15	Bluedrop Enviro Pvt. LTD	Strong evidence	Hyderabad, IndiaHQ checked Sep 22, 2026	11-50	36 contacts →
	Strong evidence “BlueDrop Enviro is an environmental company fully focused on the single objective of Wastewater Treatment.” Source: RevenueBase Database · checked Sep 22, 2026
16	Innovative Environmental Technologies Pvt. LTD	Indirect evidence	Pune, IndiaHQ checked Sep 22, 2026	51-200	36 contacts →
	Indirect evidence “Innovative Environmental Technologies Pvt.” Source: RevenueBase Database · checked Sep 22, 2026
17	Ecotech Engineering	Strong evidence	Bangalore, IndiaHQ checked Sep 22, 2026	201-500	36 contacts →
	Strong evidence “Pioneers & Leaders in Wastewater Treatment, Recycle, and Reuse.” Source: RevenueBase Database · checked Sep 22, 2026
18	Sombansi Enviro Engg PVT LTD	Partial evidence	Ghazaibad, IndiaHQ checked Sep 22, 2026	501-1,000	35 contacts →
	Partial evidence “We are leaders in the field of Water & Waste-Water treatment solutions, distinguished by our innovative Zero-Sludge Technology that efficiently converts BOD and COD into bio-gas.” Source: RevenueBase Database · checked Sep 22, 2026
19	Hydroflux Engineering PVT LTD	Indirect evidence	New Delhi, IndiaHQ checked Sep 22, 2026	51-200	32 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 22, 2026
20	Metcon Water Systems Pvt. LTD	Indirect evidence	Kolkata, IndiaHQ checked Sep 22, 2026	51-200	25 contacts →
	Indirect evidence “For over four decades, Metcon Water Systems Pvt.” Source: RevenueBase Database · checked Sep 22, 2026
21	Arka Brenstech PVT LTD	Indirect evidence	Gurugram, IndiaHQ checked Sep 22, 2026	11-50	24 contacts →
	Indirect evidence “Arka BRENStech Pvt.” Source: RevenueBase Database · checked Sep 22, 2026
22	ERA Hydro- Biotech Energy Private Limited	Indirect evidence	Pune, IndiaHQ checked Sep 22, 2026	51-200	24 contacts →
	Indirect evidence “Since our establishment in the year 2006, we Era Hydro- Biotech Energy Private Limited are Manufacturer, Wholesaler, Exporter, Service Provider and Trader, engaged in offering a…” Source: RevenueBase Database · checked Sep 22, 2026
23	Ecostp Technologies P LTD	Partial evidence	Bangalore, IndiaHQ checked Sep 22, 2026	11-50	23 contacts →
	Partial evidence “Deep expertise in sustainable solutions in sewage treatment.” Source: RevenueBase Database · checked Sep 22, 2026
24	Auric Techno Services Private Limited	Indirect evidence	Pune, IndiaHQ checked Sep 22, 2026	11-50	23 contacts →
	Indirect evidence “We, Auric Techno Services Pvt.” Source: RevenueBase Database · checked Sep 22, 2026
25	Tevoren Technologies LLP	Strong evidence	Ahmedabad, IndiaHQ checked Sep 22, 2026	11-50	22 contacts →
	Strong evidence “With Services either for Water & Wastewater Treatment using physical/biological processes or Minimum / Zero Liquid Discharge (Recycling, Recovery & Reuse) using membrane/media…” Source: RevenueBase Database · checked Sep 22, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: wastewater treatment biogas companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names wastewater treatment biogas companies.
Partial evidence: Its own public description names part of wastewater treatment biogas companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name wastewater treatment biogas companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 368 wastewater treatment biogas companies based in India

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Wastewater treatment biogas companies based in India at a glance

As of Sep 22, 2026

9.5%Verified-email coverage

10.6Average contacts per company

11-50Median size (employees)

13.0%Largest-city concentration · Pune

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

116

11-50

140

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for India, so it is reported there. Company counts and contact totals on this page are exact for India, over 368 companies.

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 wastewater treatment biogas 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.
What qualifies: Companies headquartered in India whose own description of what they do matches “wastewater treatment biogas 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 wastewater treatment biogas 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 wastewater treatment biogas companies, and records with no verified work email. Companies headquartered outside India are excluded even when they keep an office there.
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, 371 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 22, 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.

Wastewater treatment biogas companies by metro

Wastewater treatment biogas companies in Pune48
Wastewater treatment biogas companies in Chennai27

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 wastewater treatment biogas 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 wastewater treatment biogas companies are there based in India?

RevenueBase identified 368 wastewater treatment biogas companies headquartered in India 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 city has the most wastewater treatment biogas companies?

Pune leads with 48 headquartered companies, followed by Chennai (27) and Ahmedabad (22).

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 371 verified decision-maker contacts tracked across these 368 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 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 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.