Company lists · Data refreshed November 2026

Top 25 Oil and gas wastewater treatment builders worldwide

Name: Oil and gas wastewater treatment builders worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 4, 2026 6,220 companies tracked

RevenueBase identified 6,220 company matches for oil and gas wastewater treatment builders worldwide as of November 2026 and tracks 97,732 professional contacts across them, including 22,347 with verified work emails. The United States is the largest market and Pune the largest hub.

This list covers company matches for oil and gas wastewater treatment builders 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 November 4, 2026. Country and city lists for oil and gas wastewater treatment builders 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 Nov 4, 2026 How this list was built

6,220Companies

97,732Contacts tracked

22,347Verified emails

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The 25 largest oil and gas wastewater treatment builders worldwide

Ranked by team size

Top 25 of 6,220 company matches for oil and gas wastewater treatment builders worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 4, 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 Nov 4, 2026	1,001-5,000	4,010 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 · Nov 4, 2026 · View company records in RevenueBase
2	Select Water Solutions	Exact match	Gainesville, TX, United StatesHQ recorded Nov 4, 2026	1,001-5,000	1,561 contacts →
	Exact match “Select is a leader in water management and chemical technology to our customers in the oil and gas industry, as well as in other industrial applications.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
3	PMI	Exact match	Irvine, CA, United StatesHQ recorded Nov 4, 2026	n/a	1,371 contacts →
	Exact match “Training and Development Solutions” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
4	Volvo Eicher Commerical Vehical Limited	Exact match	Dhar, IndiaHQ recorded Nov 4, 2026	n/a	1,235 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 · Nov 4, 2026 · View company records in RevenueBase
5	Imco Engineering & Construction CO W.L.L	Exact match	KuwaitHQ recorded Nov 4, 2026	1,001-5,000	1,155 contacts →
	Exact match “Established in 1970, IMCO started as a pioneer in the Industrial Electrical and Instrumentation Fields in Kuwait.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
6	MWH Treatment	Exact match	Stockport, United KingdomHQ recorded Nov 4, 2026	1,001-5,000	971 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 · Nov 4, 2026 · View company records in RevenueBase
7	OVIVO	Exact match	Montreal, QC, CanadaHQ recorded Nov 4, 2026	501-1,000	857 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 · Nov 4, 2026 · View company records in RevenueBase
8	Ward And Burke	Exact match	Kilcolgan, TX, IrelandHQ recorded Nov 4, 2026	1,001-5,000	731 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 · Nov 4, 2026 · View company records in RevenueBase
9	IDE Technologies	Exact match	Kadima, IsraelHQ recorded Nov 4, 2026	501-1,000	660 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 · Nov 4, 2026 · View company records in RevenueBase
10	Westech Engineering	Exact match	Salt Lake City, United StatesHQ recorded Nov 4, 2026	501-1,000	588 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 · Nov 4, 2026 · View company records in RevenueBase
11	Petronash	Exact match	Jabal Ali, United Arab EmiratesHQ recorded Nov 4, 2026	501-1,000	492 contacts →
	Exact match “Incorporated in the year Petronash is a global leader in the manufacture of engineered packaged solutions for the Oil & Gas Industry.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
12	3m	Exact match	Velika Gorica, CroatiaHQ recorded Nov 4, 2026	n/a	477 contacts →
	Exact match “Company for production,trading, dealership and services engineering for pool water, drinking, waste and industry water - desinfection - neutralization - softening - dosing -…” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
13	HUBER	Exact match	Berching, United Arab EmiratesHQ recorded Nov 4, 2026	1,001-5,000	434 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 · Nov 4, 2026 · View company records in RevenueBase
14	Waterleau	Exact match	Wespelaar, FranceHQ recorded Nov 4, 2026	201-500	424 contacts →
	Exact match “Waterleau is your partner in sustainable water stewardship.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
15	UCC Environmental	Exact match	Waukegan, AB, United StatesHQ recorded Nov 4, 2026	201-500	407 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 · Nov 4, 2026 · View company records in RevenueBase
16	Andritz Separation	Exact match	Graz, AustriaHQ recorded Nov 4, 2026	10001+	403 contacts →
	Exact match “ANDRITZ provides mechanical and thermal solid/liquid separation technologies, complemented by comprehensive services, automation, and digitalization solutions for the chemicals…” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
17	Proxa Water	Exact match	Woodmead, South AfricaHQ recorded Nov 4, 2026	201-500	389 contacts →
	Exact match “Proxa is a leading water treatment specialist whose integrated services cover the entire water cycle and span numerous global industries, including: mining, food & beverage…” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
18	Fisia Italimpianti	Exact match	Genoa, ItalyHQ recorded Nov 4, 2026	51-200	386 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
19	RSE	Exact match	Inverness Highlands, United KingdomHQ recorded Nov 4, 2026	501-1,000	380 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 · Nov 4, 2026 · View company records in RevenueBase
20	Enviro Infra Engineers LTD	Exact match	Delhi, IndiaHQ recorded Nov 4, 2026	501-1,000	368 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 · Nov 4, 2026 · View company records in RevenueBase
21	Enfil S A	Exact match	São Paulo, BrazilHQ recorded Nov 4, 2026	1,001-5,000	358 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
22	Amenhyd	Exact match	Bab Ezzouar, AlgeriaHQ recorded Nov 4, 2026	1,001-5,000	349 contacts →
	Exact match “AMENHYD spa, a private company under Algerian law, has been a pioneer and leader in the fields of the environment for 25 years.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
23	L&t	Exact match	Chennai, IndiaHQ recorded Nov 4, 2026	5,001-10,000	328 contacts →
	Exact match “L&T Construction's Water & Effluent Treatment business vertical provides state-of-the-art design, detailed engineering, procurement, project management, project execution…” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
24	Subsea Production Systems	Exact match	United StatesHQ recorded Nov 4, 2026	10001+	315 contacts →
	Exact match “Whether topside, subsea, or a hybrid combination is required for your field, our diverse process and production solutions cover the life of a development, from concept to…” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
25	WTE Infra Projects Pvt. LTD	Exact match	Pune, IndiaHQ recorded Nov 4, 2026	501-1,000	313 contacts →
	Exact match “WTE is a globally recognised manufacturer & exporter of innovative Water & Wastewater Treatment Plants.” Recorded in the RevenueBase company graph · Nov 4, 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 “oil and gas wastewater treatment builders”. 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 6,220 oil and gas wastewater treatment builders worldwide

See the full list, filter by size, metro and specialty, and access 22,347 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Oil and gas wastewater treatment builders worldwide at a glance

As of Nov 4, 2026

22.9%Verified-email coverage

15.7Average contacts per company

11-50Median size (employees)

1.2%Largest-city concentration · Pune

Nov 4, 2026Page data refreshed

Companies by employee count

1-10

2,209

11-50

2,492

51-200

1,020

201-500

282

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 oil and gas wastewater treatment builders are linked below.
What qualifies: Company records worldwide whose business descriptions match “oil and gas wastewater treatment builders” 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 22,347 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 November 4, 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.

Oil and gas wastewater treatment builders by location

35 lists · largest first

Every Oil and gas wastewater treatment builders 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 “oil and gas wastewater treatment builders”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many oil and gas wastewater treatment builders are there worldwide?

RevenueBase identified 6,220 company matches for oil and gas wastewater treatment builders worldwide as of November 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 oil and gas wastewater treatment builders?

The United States leads with 1,011 companies, followed by India (724) and Italy (267). Every oil and gas wastewater treatment builders list by country and city is linked on this page.

Which city has the most oil and gas wastewater treatment builders?

Pune leads with 76 company records, followed by Tehran (64) and Houston (59).

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 22,347 professional contacts with verified work emails tracked across these 6,220 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 November 4, 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.