Company lists · Data refreshed September 2026

Top 25 Environmental compliance services based in the United States

RevenueBase identified 3,023 company matches for environmental compliance services associated with the United States as of September 2026 and tracks 58,027 professional contacts across them, including 24,066 with verified work emails. Houston is the largest hub.

This list covers company matches for environmental compliance 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 September 19, 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 Sep 19, 2026 How this list was built
3,023Companies
58,027Contacts tracked
24,066Verified emails
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The 25 largest environmental compliance services based in the United States

Ranked by team size
Top 25 of 3,023 company matches for environmental compliance services based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchPhoenix, AZ, United StatesHQ recorded Sep 19, 20261,001-5,0001,629 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 · Sep 19, 2026 · View company records in RevenueBase
2Exact matchLittle Rock, AR, United StatesHQ recorded Sep 19, 20261,001-5,0001,529 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 · Sep 19, 2026 · View company records in RevenueBase
3Exact matchSomerville, MA, United StatesHQ recorded Sep 19, 20261,001-5,0001,068 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 · Sep 19, 2026 · View company records in RevenueBase
4Exact matchBrooklyn Park, MN, United StatesHQ recorded Sep 19, 2026n/a982 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 · Sep 19, 2026 · View company records in RevenueBase
5Exact matchDallas, TX, United StatesHQ recorded Sep 19, 20261,001-5,000961 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 · Sep 19, 2026 · View company records in RevenueBase
6Exact matchDecatur, AL, United StatesHQ recorded Sep 19, 20261,001-5,000956 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 · Sep 19, 2026 · View company records in RevenueBase
7Exact matchLafayette, LA, United StatesHQ recorded Sep 19, 20261,001-5,000865 contacts →

Exact match

“ATC Group Services LLC is now Atlas.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8Exact matchSan Francisco, CA, United StatesHQ recorded Sep 19, 2026501-1,000732 contacts →

Exact match

“ESA is a 100% employee-owned environmental consulting firm.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9Exact matchSt. Paul, MN, United StatesHQ recorded Sep 19, 20261,001-5,000658 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 · Sep 19, 2026 · View company records in RevenueBase
10Exact matchHouston, TX, United StatesHQ recorded Sep 19, 20261,001-5,000481 contacts →

Exact match

“At VLS, we address your company’s most significant hurdles with waste management and compliance through sustainable solutions.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11Exact matchVentura, CA, United StatesHQ recorded Sep 19, 2026501-1,000479 contacts →

Exact match

“Rincon Consultants is a multi-disciplinary environmental sciences, planning, and engineering consulting firm that provides quality professional services to government and industry.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12Exact matchArlington, VA, United StatesHQ recorded Sep 19, 2026201-500474 contacts →

Exact match

“At Enhesa we empower the world’s largest businesses to achieve compliance, manage risk, and drive sustainability with clear, actionable insights.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13Exact matchMemphis, TN, United StatesHQ recorded Sep 19, 2026201-500463 contacts →

Exact match

“Innovation is not happenstance at EnSafe Inc.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14Exact matchMillersville, MD, United StatesHQ recorded Sep 19, 2026501-1,000454 contacts →

Exact match

“MES was established by the General Assembly in 1970 to assist with the preservation, improvement, and management of the quality of air, land, water, and natural resources, and to…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15Exact matchWall Township, NJ, United StatesHQ recorded Sep 19, 2026201-500447 contacts →

Exact match

“We are Groundwater & Environmental Services, Inc, better known as GES.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16Exact matchIslandia, NY, United StatesHQ recorded Sep 19, 2026201-500433 contacts →

Exact match

“Founded 40 years ago, Roux is recognized for being a highly effective, client-focused environmental consulting and management firm.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17Exact matchReston, VA, United StatesHQ recorded Sep 19, 2026501-1,000430 contacts →

Exact match

“HydroGeoLogic, Inc.(HGL) is an employee-owned company with over 36 years of experience developing innovative, effective, and sustainable engineering and remediation solutions to…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18Exact matchWheeling, IL, United StatesHQ recorded Sep 19, 2026201-500364 contacts →

Exact match

“Combining a tradition of integrity, innovation, and excellence, SET Environmental provides environmental management services to a nationwide client base.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19Exact matchKimberton, PA, United StatesHQ recorded Sep 19, 2026201-500331 contacts →

Exact match

“ALL4 is a global consulting firm committed to shaping a sustainable future through innovative environmental, health, and safety (EHS) and digital solutions.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20Exact matchGainesville, FL, United StatesHQ recorded Sep 19, 2026201-500305 contacts →

Exact match

“Environmental Consulting & Technology, Inc.(ECT) is a multi-disciplinary environmental and sustainability consulting firm delivering strategy, permitting, design, and management…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21Exact matchGainesville, VA, United StatesHQ recorded Sep 19, 2026201-500268 contacts →

Exact match

“For more than 30 years, WSSI has been the trusted partner in environmental, regulatory, cultural resources, and water resources engineering consulting.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22Exact matchHouston, TX, United StatesHQ recorded Sep 19, 2026201-500259 contacts →

Exact match

“GSI Environmental, Inc.(GSI), is an environmental engineering and science consulting firm committed to measuring, analyzing, and solving complex environmental problems around the…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23Exact matchAzusa, CA, United StatesHQ recorded Sep 19, 2026501-1,000254 contacts →

Exact match

“Alliance is one of the most experienced and trusted environmental contractors in California.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24Exact matchSpringfield, MO, United StatesHQ recorded Sep 19, 2026201-500238 contacts →

Exact match

“Environmental Works, Inc.(EWI) offers truly comprehensive environmental solutions for a variety of industries, businesses, and municipalities.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25Exact matchClovis, CA, United StatesHQ recorded Sep 19, 2026n/a233 contacts →

Exact match

“Appl Inc is an environmental services company based out of 908 N Temperance Ave, Clovis, CA, United States.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase

Showing 25 of 3,023 environmental compliance services based in the United States

See the full list, filter by size, metro and specialty, and access 24,066 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Environmental compliance services based in the United States at a glance

As of Sep 19, 2026
41.5%Verified-email coverage
19.2Average contacts per company
1-10Median size (employees)
2.2%Largest-city concentration · Houston
Sep 19, 2026Page data refreshed

Companies by employee count

1-10
1,585
11-50
1,063
51-200
292
201-500
51
501-1,000
10
1,001-5,000
17
5,001-10,000
1

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 3,023 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 compliance 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 24,066 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 September 19, 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.

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

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

RevenueBase identified 3,023 company matches for environmental compliance services associated with the United States as of September 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?

Swca Environmental Consultants tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most environmental compliance services?

Houston leads with 66 company records, followed by New York (40) and Austin (38).

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 24,066 professional contacts with verified work emails tracked across these 3,023 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 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 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.