Company lists · Data refreshed September 2026

Top 25 Oil and gas environmental remediation companies worldwide

Name: Oil and gas environmental remediation companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 2,447 companies tracked

RevenueBase identified 2,447 oil and gas environmental remediation companies worldwide as of September 2026 and tracks 56,855 professional contacts across them, including 21,105 with verified work emails and 0 with mobile numbers. The United States is the largest market and Calgary the largest hub.

This list covers oil and gas environmental remediation 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 17, 2026. Country and city lists for oil and gas environmental remediation 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 17, 2026 86% judged on-target in blind review

2,447Companies

56,855Contacts tracked

21,105Verified emails

0Mobile numbers

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The 25 largest oil and gas environmental remediation companies worldwide

Ranked by team size

Top 25 of 2,447 oil and gas environmental remediation companies worldwide, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to oil and gas environmental remediation 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	Clean Harbors	Partial evidence	Norwell, MA, United StatesHQ checked Sep 17, 2026	10001+	8,924 contacts →
	Partial evidence “Clean Harbors is North America’s leading provider of environmental and industrial services.” Source: RevenueBase Database · checked Sep 17, 2026
2	GFL Environmental INC	Partial evidence	Vaughan, ON, CanadaHQ checked Sep 17, 2026	10001+	6,179 contacts →
	Partial evidence “GFL Environmental is the only major diversified environmental services company in North America offering services in solid waste management, liquid waste management and soil…” Source: RevenueBase Database · checked Sep 17, 2026
3	PMI	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 17, 2026	n/a	1,308 contacts →
	Indirect evidence “Training and Development Solutions” Source: RevenueBase Database · checked Sep 17, 2026
4	Sarp Industries	Indirect evidence	Limay, FranceHQ checked Sep 17, 2026	1,001-5,000	753 contacts →
	Indirect evidence “The leading company in Europe for the treatment and recovery of hazardous waste and polluted sites.” Source: RevenueBase Database · checked Sep 17, 2026
5	Tervita Corporation	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 17, 2026	1,001-5,000	606 contacts →
	Indirect evidence “We are Tervita, a company with dedicated employees on a single mission: the future.” Source: RevenueBase Database · checked Sep 17, 2026
6	ENI Rewind	Partial evidence	San Donato Milanese, ItalyHQ checked Sep 17, 2026	1,001-5,000	543 contacts →
	Partial evidence “We are Eni’s environmental company active for over 20 years, in giving new life, according to the principles of the circular economy, to industrial land, water and waste through…” Source: RevenueBase Database · checked Sep 17, 2026
7	Entact, LLC	Strong evidence	Westmont, IL, United StatesHQ checked Sep 17, 2026	501-1,000	483 contacts →
	Strong evidence “ENTACT is the partner of choice in solving our customer's most complex environmental remediation and geotechnical infrastructure challenges.” Source: RevenueBase Database · checked Sep 17, 2026
8	Vertex Resource Group LTD	Partial evidence	Sherwood Park, AB, CanadaHQ checked Sep 17, 2026	1,001-5,000	471 contacts →
	Partial evidence “Since 1962, Vertex has been a leading North American provider of environmental services.” Source: RevenueBase Database · checked Sep 17, 2026
9	ROUX	Partial evidence	Islandia, NY, United StatesHQ checked Sep 17, 2026	201-500	433 contacts →
	Partial evidence “Founded 40 years ago, Roux is recognized for being a highly effective, client-focused environmental consulting and management firm.” Source: RevenueBase Database · checked Sep 17, 2026
10	Hydrogeologic, INC	Partial evidence	Reston, VA, United StatesHQ checked Sep 17, 2026	501-1,000	430 contacts →
	Partial evidence “HydroGeoLogic, Inc.(HGL) is an employee-owned company with over 36 years of experience developing innovative, effective, and sustainable engineering and remediation solutions to…” Source: RevenueBase Database · checked Sep 17, 2026
11	Hepaco, LLC	Partial evidence	Charlotte, NC, United StatesHQ checked Sep 17, 2026	501-1,000	428 contacts →
	Partial evidence “HEPACO is the premier environmental and emergency services company in the Eastern United States with coverage across 40+ regional offices.” Source: RevenueBase Database · checked Sep 17, 2026
12	Brézillon	Indirect evidence	Margny-lès-compiègne, FranceHQ checked Sep 17, 2026	51-200	286 contacts →
	Indirect evidence “Entreprise spécialisée en génie environnemental, Brézillon agit depuis près de 30 ans pour préserver, restaurer et valoriser les terrains sur l’ensemble du territoire national.” Source: RevenueBase Database · checked Sep 17, 2026
13	Valgo Groupe	Indirect evidence	Paris, FranceHQ checked Sep 17, 2026	501-1,000	279 contacts →
	Indirect evidence “VALGO - Régénérer, Rénover, Revaloriser Entreprise internationale spécialisée dans la réhabilitation des sites pollués, VALGO transforme les sols, bâtiments et infrastructures…” Source: RevenueBase Database · checked Sep 17, 2026
14	Sevenson Environmental Services INC	Partial evidence	Niagara Falls, NY, United StatesHQ checked Sep 17, 2026	501-1,000	277 contacts →
	Partial evidence “Sevenson Environmental Services, Inc.” Source: RevenueBase Database · checked Sep 17, 2026
15	Environmental Restoration LLC	Strong evidence	Saint Louis, MO, United StatesHQ checked Sep 17, 2026	201-500	273 contacts →
	Strong evidence “Environmental Restoration LLC (ER) is 100% employee-owned and provides Environmental Site Remediation, Construction and Emergency Response services for hazardous waste materials…” Source: RevenueBase Database · checked Sep 17, 2026
16	Jbs&g	Partial evidence	Sydney, AustraliaHQ checked Sep 17, 2026	201-500	262 contacts →
	Partial evidence “Established in 1996, JBS & G is one of Australia’s leading environmental consultancies with offices in Sydney, Melbourne, Perth, Adelaide, Brisbane, Canberra, Darwin, Wollongong…” Source: RevenueBase Database · checked Sep 17, 2026
17	Enviropacific	Partial evidence	Macquarie Park, AustraliaHQ checked Sep 17, 2026	201-500	260 contacts →
	Partial evidence “Enviropacific is committed to working towards creating safer environments and sustainable communities.” Source: RevenueBase Database · checked Sep 17, 2026
18	Forgen	Indirect evidence	Centennial, CO, United StatesHQ checked Sep 17, 2026	201-500	255 contacts →
	Indirect evidence “At Forgen, we leave the planet better than we found it.” Source: RevenueBase Database · checked Sep 17, 2026
19	Alliance Environmental Group, LLC	Partial evidence	Azusa, CA, United StatesHQ checked Sep 17, 2026	501-1,000	254 contacts →
	Partial evidence “Alliance is one of the most experienced and trusted environmental contractors in California.” Source: RevenueBase Database · checked Sep 17, 2026
20	QM Environmental	Partial evidence	Toronto, ON, CanadaHQ checked Sep 17, 2026	201-500	253 contacts →
	Partial evidence “QM Environmental is a leading Canadian environmental and industrial services provider, trusted for over three decades to deliver complex projects safely, responsibly, and with…” Source: RevenueBase Database · checked Sep 17, 2026
21	Cascade Environmental, LLC	Strong evidence	Bothell, WA, United StatesHQ checked Sep 17, 2026	1,001-5,000	248 contacts →
	Strong evidence “CASCADE is the leading provider of environmental and geotechnical drilling, site investigation and environmental remediation.” Source: RevenueBase Database · checked Sep 17, 2026
22	Environmental Works, INC	Partial evidence	Springfield, MO, United StatesHQ checked Sep 17, 2026	201-500	238 contacts →
	Partial evidence “Environmental Works, Inc.(EWI) offers truly comprehensive environmental solutions for a variety of industries, businesses, and municipalities.” Source: RevenueBase Database · checked Sep 17, 2026
23	TSL Engenharia, Manutenção E Preservação Ambiental S A	Indirect evidence	São Paulo, BrazilHQ checked Sep 17, 2026	201-500	238 contacts →
	Indirect evidence “TSL has been in the market for more than 30 years.” Source: RevenueBase Database · checked Sep 17, 2026
24	Miller Environmental Group, INC	Strong evidence	Calverton, NY, United StatesHQ checked Sep 17, 2026	201-500	231 contacts →
	Strong evidence “Miller Environmental Group is a leading environmental response, remediation and restoration services company, providing industry, government, commercial and residential customers…” Source: RevenueBase Database · checked Sep 17, 2026
25	Superior Environmental Solutions, LLC	Partial evidence	Cincinnati, OH, United StatesHQ checked Sep 17, 2026	501-1,000	225 contacts →
	Partial evidence “Superior Environmental Solutions, LLC (SES) is an industrial cleaning service company founded in response to the growing need for a superior and cost effective service provider.” Source: RevenueBase Database · checked Sep 17, 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: oil and gas environmental remediation 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 oil and gas environmental remediation companies.
Partial evidence: Its own public description names part of oil and gas environmental remediation companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name oil and gas environmental remediation 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 2,447 oil and gas environmental remediation companies worldwide

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Oil and gas environmental remediation companies worldwide at a glance

As of Sep 17, 2026

37.1%Verified-email coverage

23.2Average contacts per company

11-50Median size (employees)

2.1%Largest-city concentration · Calgary

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

957

11-50

992

51-200

346

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 oil and gas environmental remediation 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: 12 countries, largest first: the United States, Canada, Italy, the United Kingdom, Brazil, France, Germany, Australia, the Netherlands, Belgium and 2 more. Country and city lists for oil and gas environmental remediation companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “oil and gas environmental remediation 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 oil and gas environmental remediation 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 oil and gas environmental remediation 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, 21,105 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 17, 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.

Oil and gas environmental remediation companies by location

12 lists · largest first

Every Oil and gas environmental remediation 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 oil and gas environmental remediation 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 oil and gas environmental remediation companies are there worldwide?

RevenueBase identified 2,447 oil and gas environmental remediation 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?

Clean Harbors, headquartered in Norwell, tops this list with the largest team on record.

Which country has the most oil and gas environmental remediation companies?

The United States leads with 1,408 companies, followed by Canada (246) and Italy (164). Every oil and gas environmental remediation companies list by country and city is linked on this page.

Which city has the most oil and gas environmental remediation companies?

Calgary leads with 52 headquartered companies, followed by Houston (45) and Sao Paulo (33).

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 21,105 verified decision-maker contacts tracked across these 2,447 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 17, 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.