Company lists · Data refreshed September 2026

Top 25 Environmental site assessment companies worldwide

Name: Environmental site assessment companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 5,110 companies tracked

RevenueBase identified 5,110 environmental site assessment companies worldwide as of September 2026 and tracks 58,177 professional contacts across them, including 22,704 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers environmental site assessment 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 19, 2026. Country and city lists for environmental site assessment 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 19, 2026 86% judged on-target in blind review

5,110Companies

58,177Contacts tracked

22,704Verified emails

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The 25 largest environmental site assessment companies worldwide

Ranked by team size

Top 25 of 5,110 environmental site assessment companies worldwide, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to environmental site assessment 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	Langan Engineering & Environmental Services	Partial evidence	Parsippany, NJ, United StatesHQ checked Sep 19, 2026	1,001-5,000	2,177 contacts →
	Partial evidence “Langan's client-focused, highly entrepreneurial culture cultivates an environment of opportunities in which career growth and teamwork flourish.” Source: RevenueBase Database · checked Sep 19, 2026
2	Montrose Environmental Group	Partial evidence	Little Rock, AR, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,529 contacts →
	Partial evidence “Onterris (formerly Montrose Environmental Group) was one of the first to see environmental responsibility as not just an imperative but as a strategic asset.” Source: RevenueBase Database · checked Sep 19, 2026
3	Alliance Technical Group	Partial evidence	Decatur, AL, United StatesHQ checked Sep 19, 2026	1,001-5,000	956 contacts →
	Partial evidence “Alliance is a new kind of environmental services company-powered by innovation, focused on service, and committed to client success.” Source: RevenueBase Database · checked Sep 19, 2026
4	Pinchin In Canada	Indirect evidence	Mississauga, ON, CanadaHQ checked Sep 19, 2026	1,001-5,000	895 contacts →
	Indirect evidence “Pinchin Ltd.” Source: RevenueBase Database · checked Sep 19, 2026
5	Antea Group USA	Partial evidence	St Paul, MN, United StatesHQ checked Sep 19, 2026	1,001-5,000	658 contacts →
	Partial evidence “Antea Group is an international engineering and environmental consulting firm specializing in full-service solutions in the fields of environment, health and safety, and…” Source: RevenueBase Database · checked Sep 19, 2026
6	ENI Rewind	Partial evidence	San Donato Milanese, ItalyHQ checked Sep 19, 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 19, 2026
7	EBI Consulting	Indirect evidence	Burlington, MA, United StatesHQ checked Sep 19, 2026	501-1,000	535 contacts →
	Indirect evidence “For 35 years we have been helping investors, lenders, owners, developers, contractors, and property managers reduce risk and optimize their built facilities, infrastructure and…” Source: RevenueBase Database · checked Sep 19, 2026
8	Rincon Consultants	Partial evidence	Ventura, CA, United StatesHQ checked Sep 19, 2026	501-1,000	479 contacts →
	Partial evidence “Rincon Consultants is a multi-disciplinary environmental sciences, planning, and engineering consulting firm that provides quality professional services to government and industry.” Source: RevenueBase Database · checked Sep 19, 2026
9	Vertex Resource Group LTD	Partial evidence	Sherwood Park, AB, CanadaHQ checked Sep 19, 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 19, 2026
10	Groundwater & Environmental Services, INC	Partial evidence	Wall Township, NJ, United StatesHQ checked Sep 19, 2026	201-500	447 contacts →
	Partial evidence “We are Groundwater & Environmental Services, Inc, better known as GES.” Source: RevenueBase Database · checked Sep 19, 2026
11	ROUX	Partial evidence	Islandia, NY, United StatesHQ checked Sep 19, 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 19, 2026
12	AEI Consultants	Strong evidence	Walnut Creek, CA, United StatesHQ checked Sep 19, 2026	201-500	433 contacts →
	Strong evidence “AEI Consultants provides building, environmental, land and sustainability assessment and consulting services throughout North America.” Source: RevenueBase Database · checked Sep 19, 2026
13	EDR	Partial evidence	Shelton, CT, United StatesHQ checked Sep 19, 2026	201-500	353 contacts →
	Partial evidence “Serving the property due diligence industry since 1990 With over two decades of experience delivering the most comprehensive environmental risk data in the United States, EDR…” Source: RevenueBase Database · checked Sep 19, 2026
14	ADX Groupe	Indirect evidence	Château-gontier, FranceHQ checked Sep 19, 2026	201-500	343 contacts →
	Indirect evidence “ADX Groupe, votre bureau d'études de l'existant - Réalisation de diagnostics immobiliers obligatoires lors de la transaction ou location des biens- Recherche d’amiante dans tous…” Source: RevenueBase Database · checked Sep 19, 2026
15	Labanalysis Environmental Science	Partial evidence	San Giovanni Teatino, ItalyHQ checked Sep 19, 2026	501-1,000	293 contacts →
	Partial evidence “LabAnalysis Environmental Science is LabAnalysis Group's company dedicated to the environmental sector.” Source: RevenueBase Database · checked Sep 19, 2026
16	Environmental Restoration LLC	Strong evidence	Saint Louis, MO, United StatesHQ checked Sep 19, 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 19, 2026
17	Nova Group, GBC	Partial evidence	St. Louis Park, MN, United StatesHQ checked Sep 19, 2026	201-500	264 contacts →
	Partial evidence “Nova Group, GBC is an international, multidisciplinary advising firm providing environmental, engineering and energy services throughout North America and around the globe.” Source: RevenueBase Database · checked Sep 19, 2026
18	Jbs&g	Partial evidence	Sydney, AustraliaHQ checked Sep 19, 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 19, 2026
19	GSI Environmental INC	Partial evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	201-500	259 contacts →
	Partial evidence “GSI Environmental, Inc.(GSI), is an environmental engineering and science consulting firm committed to measuring, analyzing, and solving complex environmental problems around the…” Source: RevenueBase Database · checked Sep 19, 2026
20	Applus Environment	Partial evidence	Madrid, SpainHQ checked Sep 19, 2026	10001+	252 contacts →
	Partial evidence “At Applus+, we provide environmental management services to help clients reduce their environmental footprint and improve operational efficiency, while minimizing risks and…” Source: RevenueBase Database · checked Sep 19, 2026
21	Cascade Environmental, LLC	Strong evidence	Bothell, WA, United StatesHQ checked Sep 19, 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 19, 2026
22	EHS Support	Partial evidence	Pittsburgh, United StatesHQ checked Sep 19, 2026	201-500	241 contacts →
	Partial evidence “EHS Support is a global family of engineers, geologists, scientists, and technical experts who specialize in complex environmental, health, and safety (EH & S) challenges across…” Source: RevenueBase Database · checked Sep 19, 2026
23	Environmental Works, INC	Partial evidence	Springfield, MO, United StatesHQ checked Sep 19, 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 19, 2026
24	Walm Engenharia E Tecnologia Ambiental	Indirect evidence	São Paulo, BrazilHQ checked Sep 19, 2026	51-200	234 contacts →
	Indirect evidence “A WALM Engenharia e Tecnologia Ambiental Ltda.” Source: RevenueBase Database · checked Sep 19, 2026
25	Normec I2 Analytical	Partial evidence	Hertfordshire, United KingdomHQ checked Sep 19, 2026	201-500	218 contacts →
	Partial evidence “Founded in 2003, Normec i2 Analytical is one of Europe's leading environmental testing companies providing its customers a comprehensive range of analytical, monitoring and…” Source: RevenueBase Database · checked Sep 19, 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: environmental site assessment 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 environmental site assessment companies.
Partial evidence: Its own public description names part of environmental site assessment companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name environmental site assessment 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 5,110 environmental site assessment companies worldwide

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Environmental site assessment companies worldwide at a glance

As of Sep 19, 2026

39.0%Verified-email coverage

11.4Average contacts per company

1-10Median size (employees)

1.5%Largest-city concentration · Sao Paulo

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

2,960

11-50

1,682

51-200

341

201-500

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

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among environmental site assessment 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: Every country. Country and city lists for environmental site assessment companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “environmental site assessment 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 environmental site assessment 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 environmental site assessment 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, 22,704 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 19, 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.

Environmental site assessment companies by location

17 lists · largest first

Every Environmental site assessment 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 environmental site assessment 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 environmental site assessment companies are there worldwide?

RevenueBase identified 5,110 environmental site assessment 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?

Langan Engineering & Environmental Services, headquartered in Parsippany, tops this list with the largest team on record.

Which country has the most environmental site assessment companies?

The United States leads with 1,701 companies, followed by Brazil (495) and Canada (285). Every environmental site assessment companies list by country and city is linked on this page.

Which city has the most environmental site assessment companies?

Sao Paulo leads with 75 headquartered companies, followed by Houston (37) and Calgary (34).

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 22,704 verified decision-maker contacts tracked across these 5,110 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 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 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.