Company lists · Data refreshed September 2026

Top 25 Pollution control consultants worldwide

Name: Pollution control consultants worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 11,188 companies tracked

RevenueBase identified 11,188 pollution control consultants worldwide as of September 2026 and tracks 145,823 professional contacts across them, including 46,681 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers pollution control consultants 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 20, 2026. Country and city lists for pollution control consultants 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 20, 2026 86% judged on-target in blind review

11,188Companies

145,823Contacts tracked

46,681Verified emails

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The 25 largest pollution control consultants worldwide

Ranked by team size

Top 25 of 11,188 pollution control consultants worldwide, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to pollution control consultants: 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	Indirect evidence	Norwell, MA, United StatesHQ checked Sep 20, 2026	10001+	8,924 contacts →
	Indirect evidence “Clean Harbors is North America’s leading provider of environmental and industrial services.” Source: RevenueBase Database · checked Sep 20, 2026
2	Golder	Indirect evidence	Vancouver, BC, CanadaHQ checked Sep 20, 2026	5,001-10,000	3,167 contacts →
	Indirect evidence “Golder was acquired by WSP.” Source: RevenueBase Database · checked Sep 20, 2026
3	Swca Environmental Consultants	Indirect evidence	Phoenix, AZ, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,629 contacts →
	Indirect evidence “Founded on a commitment to sound science and creative solutions, SWCA is a leader in environmental and management consulting services.” Source: RevenueBase Database · checked Sep 20, 2026
4	Montrose Environmental Group	Indirect evidence	Little Rock, AR, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,529 contacts →
	Indirect 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 20, 2026
5	DGE Danmark	Indirect evidence	Højbjerg, DenmarkHQ checked Sep 20, 2026	n/a	1,176 contacts →
	Indirect evidence “Miljø er vores kernekompetence og vores ansvar.” Source: RevenueBase Database · checked Sep 20, 2026
6	Barr Engineering CO	Indirect evidence	Minneapolis, MN, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,088 contacts →
	Indirect evidence “Barr provides engineering and environmental consulting services to clients across the Midwest, throughout the Americas, and around the world.” Source: RevenueBase Database · checked Sep 20, 2026
7	Triumvirate Environmental	Indirect evidence	Somerville, MA, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,068 contacts →
	Indirect evidence “Triumvirate Environmental provides sustainable environmental solutions to leading companies in the Life Sciences, Healthcare, Education, and Advanced Manufacturing markets.” Source: RevenueBase Database · checked Sep 20, 2026
8	IEA	Indirect evidence	Brooklyn Park, MN, United StatesHQ checked Sep 20, 2026	n/a	982 contacts →
	Indirect evidence “The Institute for Environmental Assessment, Inc.(IEA) is small business committed to providing trusted environmental safety consulting services for private and public…” Source: RevenueBase Database · checked Sep 20, 2026
9	Trinity Consultants	Partial evidence	Dallas, TX, United StatesHQ checked Sep 20, 2026	1,001-5,000	961 contacts →
	Partial evidence “Trinity Consultants is a global team of experts helping organizations solve complex challenges in environmental compliance, ecological protection, infrastructure performance, and…” Source: RevenueBase Database · checked Sep 20, 2026
10	Alliance Technical Group	Indirect evidence	Decatur, AL, United StatesHQ checked Sep 20, 2026	1,001-5,000	956 contacts →
	Indirect 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 20, 2026
11	Pinchin In Canada	Indirect evidence	Mississauga, ON, CanadaHQ checked Sep 20, 2026	1,001-5,000	895 contacts →
	Indirect evidence “Pinchin Ltd.” Source: RevenueBase Database · checked Sep 20, 2026
12	ATC Group Services LLC	Indirect evidence	Lafayette, LA, United StatesHQ checked Sep 20, 2026	1,001-5,000	865 contacts →
	Indirect evidence “ATC Group Services LLC is now Atlas.” Source: RevenueBase Database · checked Sep 20, 2026
13	Pares&alvarez	Indirect evidence	Santiago, ChileHQ checked Sep 20, 2026	501-1,000	807 contacts →
	Indirect evidence “We are Pares & Alvarez, our extensive experience and the recognition of our clients makes us one of the leading Engineering Companies in environmental, consulting, engineering and…” Source: RevenueBase Database · checked Sep 20, 2026
14	Interagua Ecuador	Indirect evidence	Guayaquil, EcuadorHQ checked Sep 20, 2026	501-1,000	783 contacts →
	Indirect evidence “Somos una empresa sólida, confiable, orientada al cliente; líder en el manejo ambiental, con procesos de calidad, tecnología y recursos humanos competentes.” Source: RevenueBase Database · checked Sep 20, 2026
15	The Foth Companies	Indirect evidence	De Pere, WI, United StatesHQ checked Sep 20, 2026	501-1,000	781 contacts →
	Indirect evidence “By combining science, engineering, and technology with a true collaborative spirit, Foth has delivered innovative solutions to our clients since 1938.” Source: RevenueBase Database · checked Sep 20, 2026
16	Environmental Science Associates	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 20, 2026	501-1,000	732 contacts →
	Indirect evidence “ESA is a 100% employee-owned environmental consulting firm.” Source: RevenueBase Database · checked Sep 20, 2026
17	Inerco	Partial evidence	Sevilla, SpainHQ checked Sep 20, 2026	1,001-5,000	688 contacts →
	Partial evidence “INERCO, with 30 years of experience, offers comprehensive services and develops advanced technologies that contribute to sustainable industrial development, acting as a leader in…” Source: RevenueBase Database · checked Sep 20, 2026
18	Antea Group USA	Indirect evidence	St Paul, MN, United StatesHQ checked Sep 20, 2026	1,001-5,000	658 contacts →
	Indirect 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 20, 2026
19	ENI Rewind	Indirect evidence	San Donato Milanese, ItalyHQ checked Sep 20, 2026	1,001-5,000	543 contacts →
	Indirect 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 20, 2026
20	CTA Engenharia	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 20, 2026	201-500	540 contacts →
	Indirect evidence “A CTA foi criada em 1995, em Belo Horizonte Minas Gerais, ampliando sua atividade e posicionando sua sede no estado do Rio de Janeiro em Duque de Caxias, próximo ao Pólo…” Source: RevenueBase Database · checked Sep 20, 2026
21	Vital Engenharia Ambiental	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 20, 2026	5,001-10,000	500 contacts →
	Indirect evidence “Vital Engenharia Ambiental is an environmental services company based out of R Santa Luzia, 651, 21 Andar Parte, Rio De Janeiro, Rio De Janeiro, Brazil.” Source: RevenueBase Database · checked Sep 20, 2026
22	Rincon Consultants	Partial evidence	Ventura, CA, United StatesHQ checked Sep 20, 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 20, 2026
23	Vertex Resource Group LTD	Indirect evidence	Sherwood Park, AB, CanadaHQ checked Sep 20, 2026	1,001-5,000	471 contacts →
	Indirect evidence “Since 1962, Vertex has been a leading North American provider of environmental services.” Source: RevenueBase Database · checked Sep 20, 2026
24	Ensafe	Indirect evidence	Memphis, TN, United StatesHQ checked Sep 20, 2026	201-500	463 contacts →
	Indirect evidence “Innovation is not happenstance at EnSafe Inc.” Source: RevenueBase Database · checked Sep 20, 2026
25	Sete Soluções E Tecnologia Ambiental	Indirect evidence	Belo Horizonte, BrazilHQ checked Sep 20, 2026	501-1,000	448 contacts →
	Indirect evidence “Somos uma das maiores consultorias em meio ambiente do Brasil, fundada em 1997, contando, hoje, com uma equipe técnica multidisciplinar permanente, que congrega profissionais das…” Source: RevenueBase Database · checked Sep 20, 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: pollution control consultants. 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 pollution control consultants.
Partial evidence: Its own public description names part of pollution control consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name pollution control consultants. 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 11,188 pollution control consultants worldwide

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Pollution control consultants worldwide at a glance

As of Sep 20, 2026

32.0%Verified-email coverage

13.0Average contacts per company

1-10Median size (employees)

1.8%Largest-city concentration · Sao Paulo

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

6,649

11-50

3,366

51-200

846

201-500

188

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 pollution control consultants, 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 pollution control consultants are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “pollution control consultants”. 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 pollution control consultants), 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 pollution control consultants, 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, 46,681 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 20, 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.

Pollution control consultants by location

39 lists · largest first

Every Pollution control consultants 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 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 pollution control consultants, 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 pollution control consultants are there worldwide?

RevenueBase identified 11,188 pollution control consultants 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 pollution control consultants?

The United States leads with 2,720 companies, followed by Brazil (1,885) and India (452). Every pollution control consultants list by country and city is linked on this page.

Which city has the most pollution control consultants?

Sao Paulo leads with 203 headquartered companies, followed by Belo Horizonte (79) and Rio De Janeiro (75).

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 46,681 verified decision-maker contacts tracked across these 11,188 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 20, 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.