Company lists · Data refreshed October 2026

Top 25 Environmental management services based in the United States

Name: Environmental management services based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 25, 2026 4,661 companies tracked

RevenueBase identified 4,661 company matches for environmental management services associated with the United States as of October 2026 and tracks 119,687 professional contacts across them, including 45,744 with verified work emails. Houston is the largest hub.

This list covers company matches for environmental management services associated with the United States, 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 October 25, 2026.

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 Oct 25, 2026 How this list was built

4,661Companies

119,687Contacts tracked

45,744Verified emails

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The 25 largest environmental management services based in the United States

Ranked by team size

Top 25 of 4,661 company matches for environmental management services based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 25, 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	Clean Harbors	Exact match	Norwell, MA, United StatesHQ recorded Oct 25, 2026	10001+	9,255 contacts →
	Exact match “Clean Harbors is North America’s leading provider of environmental and industrial services.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
2	APTIM	Exact match	Baton Rouge, LA, United StatesHQ recorded Oct 25, 2026	1,001-5,000	2,692 contacts →
	Exact match “APTIM enhances the quality of the environment, wellbeing of people, resilience of communities, and opportunity for employees to make a difference, not just a living.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
3	Civil & Environmental Consultants, INC	Exact match	Moon Township, PA, United StatesHQ recorded Oct 25, 2026	1,001-5,000	2,204 contacts →
	Exact match “Civil & Environmental Consultants, Inc.(CEC) provides comprehensive market-oriented consulting services that advance the strategic business objectives of its clients.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
4	Swca Environmental Consultants	Exact match	Phoenix, AZ, United StatesHQ recorded Oct 25, 2026	1,001-5,000	1,661 contacts →
	Exact match “Founded on a commitment to sound science and creative solutions, SWCA is a leader in environmental and management consulting services.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
5	Weston Solutions, INC	Exact match	West Chester, PA, United StatesHQ recorded Oct 25, 2026	1,001-5,000	1,525 contacts →
	Exact match “Weston Solutions, Inc.(Weston) is a 100% employee-owned environmental and infrastructure services firm committed to safety and providing measurable client value.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
6	Adec Innovations	Exact match	Irvine, CA, United StatesHQ recorded Oct 25, 2026	1,001-5,000	1,508 contacts →
	Exact match “ADEC Innovations seamlessly delivers fully integrated, cost-effective industry expertise, business process & data management, and software services.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
7	Partner Engineering & Science, INC	Exact match	Torrance, CA, United StatesHQ recorded Oct 25, 2026	1,001-5,000	1,418 contacts →
	Exact match “Partner Assessment Corp.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
8	PMI	Exact match	Irvine, CA, United StatesHQ recorded Oct 25, 2026	n/a	1,361 contacts →
	Exact match “Training and Development Solutions” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
9	US Ecology Inc., A Republic Services Company	Exact match	Boise, ID, United StatesHQ recorded Oct 25, 2026	1,001-5,000	1,353 contacts →
	Exact match “US Ecology is a Republic Services company.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
10	Apex Companies	Exact match	Rockville, MD, United StatesHQ recorded Oct 25, 2026	1,001-5,000	1,266 contacts →
	Exact match “Who is Apex?” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
11	Triumvirate Environmental	Exact match	Somerville, MA, United StatesHQ recorded Oct 25, 2026	1,001-5,000	1,120 contacts →
	Exact match “Triumvirate Environmental provides sustainable environmental solutions to leading companies in the Life Sciences, Healthcare, Education, and Advanced Manufacturing markets.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
12	Barr Engineering CO	Exact match	Minneapolis, MN, United StatesHQ recorded Oct 25, 2026	1,001-5,000	1,108 contacts →
	Exact match “Barr provides engineering and environmental consulting services to clients across the Midwest, throughout the Americas, and around the world.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
13	Trinity Consultants	Exact match	Dallas, TX, United StatesHQ recorded Oct 25, 2026	1,001-5,000	1,077 contacts →
	Exact match “Trinity Consultants is a global team of experts helping organizations solve complex challenges in environmental compliance, ecological protection, infrastructure performance, and…” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
14	Alliance Technical Group	Exact match	Decatur, AL, United StatesHQ recorded Oct 25, 2026	1,001-5,000	1,048 contacts →
	Exact match “Alliance is a new kind of environmental services company-powered by innovation, focused on service, and committed to client success.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
15	IEA	Exact match	Brooklyn Park, MN, United StatesHQ recorded Oct 25, 2026	n/a	1,001 contacts →
	Exact match “The Institute for Environmental Assessment, Inc.(IEA) is small business committed to providing trusted environmental safety consulting services for private and public…” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
16	Crystal Clean	Exact match	Hoffman Estates, IL, United StatesHQ recorded Oct 25, 2026	1,001-5,000	933 contacts →
	Exact match “Crystal Clean is a national leader in the environmental services market, providing the smart alternative.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
17	ATC Group Services LLC	Exact match	Lafayette, LA, United StatesHQ recorded Oct 25, 2026	1,001-5,000	872 contacts →
	Exact match “ATC Group Services LLC is now Atlas.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
18	ENVU	Exact match	Cary, NC, United StatesHQ recorded Oct 25, 2026	1,001-5,000	867 contacts →
	Exact match “At Envu, we partner with our customers to design world-class, forward-thinking innovations that protect and enhance the health of environments around the world.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
19	FCC Environmental Services	Exact match	Houston, TX, United StatesHQ recorded Oct 25, 2026	1,001-5,000	863 contacts →
	Exact match “A Leader in Environmental Services FCC Environmental Services is proud to serve over 14 million Americans across 7 states, supported by a dedicated team of Our 1200+ vehicle fleet…” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
20	Montrose Environmental Group	Exact match	Little Rock, AR, United StatesHQ recorded Oct 25, 2026	1,001-5,000	843 contacts →
	Exact match “Onterris (formerly Montrose Environmental Group) was one of the first to see environmental responsibility as not just an imperative but as a strategic asset.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
21	DUDEK	Exact match	Encinitas, CA, United StatesHQ recorded Oct 25, 2026	501-1,000	807 contacts →
	Exact match “Dudek is an environmental, planning, and engineering consulting firm.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
22	Environmental Science Associates	Exact match	San Francisco, CA, United StatesHQ recorded Oct 25, 2026	501-1,000	730 contacts →
	Exact match “ESA is a 100% employee-owned environmental consulting firm.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
23	Antea Group USA	Exact match	St. Paul, MN, United StatesHQ recorded Oct 25, 2026	1,001-5,000	658 contacts →
	Exact match “Antea Group is an international engineering and environmental consulting firm specializing in full-service solutions in the fields of environment, health and safety, and…” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
24	Trihydro Corporation	Exact match	Laramie, WY, United StatesHQ recorded Oct 25, 2026	501-1,000	570 contacts →
	Exact match “Headquartered in Laramie, Wyoming, Trihydro provides environmental consulting, engineering and surveying, air quality and process management, information technology, and water and…” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
25	Synagro	Exact match	Baltimore, MD, United StatesHQ recorded Oct 25, 2026	501-1,000	562 contacts →
	Exact match “Synagro Technologies, Inc.” Recorded in the RevenueBase company graph · Oct 25, 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 “environmental management services”. 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 4,661 environmental management services based in the United States

See the full list, filter by size, metro and specialty, and access 45,744 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Environmental management services based in the United States at a glance

As of Oct 25, 2026

38.2%Verified-email coverage

25.7Average contacts per company

11-50Median size (employees)

2.1%Largest-city concentration · Houston

Oct 25, 2026Page data refreshed

Companies by employee count

1-10

2,251

11-50

1,635

51-200

540

201-500

126

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 4,661 companies.

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.
What qualifies: Company records associated with the United States whose business descriptions match “environmental management services” 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. Where headquarters information is recorded, preview rows are also filtered to this page’s location. 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 45,744 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 October 25, 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.

Environmental management services by metro

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 “environmental management services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many environmental management services are there based in the United States?

RevenueBase identified 4,661 company matches for environmental management services associated with the United States as of October 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?

Clean Harbors tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most environmental management services?

Houston leads with 97 company records, followed by New York (59) and Austin (42).

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 45,744 professional contacts with verified work emails tracked across these 4,661 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 October 25, 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.