Company lists · Data refreshed October 2026

Top 25 Industrial environmental consultants based in the United States

Name: Industrial environmental consultants based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 16, 2026 4,069 companies tracked

RevenueBase identified 4,069 company matches for industrial environmental consultants associated with the United States as of October 2026 and tracks 133,264 professional contacts across them, including 54,682 with verified work emails. Houston is the largest hub.

This list covers company matches for industrial environmental consultants 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 16, 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 16, 2026 How this list was built

4,069Companies

133,264Contacts tracked

54,682Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest industrial environmental consultants based in the United States

Ranked by team size

Top 25 of 4,069 company matches for industrial environmental consultants based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 16, 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	Tetra Tech	Exact match	Pasadena, CA, United StatesHQ recorded Oct 16, 2026	10001+	13,725 contacts →
	Exact match “Tetra Tech is the leader in water, environment and sustainable infrastructure, providing high-end technical and engineering services for projects worldwide.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
2	Clean Harbors	Exact match	Norwell, MA, United StatesHQ recorded Oct 16, 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 16, 2026 · View company records in RevenueBase
3	Terracon	Exact match	Olathe, KS, United StatesHQ recorded Oct 16, 2026	5,001-10,000	6,380 contacts →
	Exact match “Terracon is a 100 percent employee-owned consulting engineering firm providing quality services to clients.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
4	Geosyntec Consultants	Exact match	Boca Raton, FL, United StatesHQ recorded Oct 16, 2026	1,001-5,000	2,521 contacts →
	Exact match “Geosyntec is a consulting and engineering firm that works with private and public sector clients to address new ventures and complex problems involving our environment, natural…” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
5	Brown And Caldwell	Exact match	Walnut Creek, CA, United StatesHQ recorded Oct 16, 2026	1,001-5,000	2,510 contacts →
	Exact match “Headquartered in Walnut Creek, Calif, Brown and Caldwell is an employee-owned firm with 2,100+ professionals serving clients locally and globally from 52 locations.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
6	Langan Engineering & Environmental Services	Exact match	Parsippany, NJ, United StatesHQ recorded Oct 16, 2026	1,001-5,000	2,402 contacts →
	Exact match “Langan's client-focused, highly entrepreneurial culture cultivates an environment of opportunities in which career growth and teamwork flourish.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
7	Providence	Exact match	Baton Rouge, LA, United StatesHQ recorded Oct 16, 2026	n/a	2,256 contacts →
	Exact match “Providence is an employee-owned engineering and environmental consulting firm.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
8	Civil & Environmental Consultants, INC	Exact match	Moon Township, PA, United StatesHQ recorded Oct 16, 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 16, 2026 · View company records in RevenueBase
9	Swca Environmental Consultants	Exact match	Phoenix, AZ, United StatesHQ recorded Oct 16, 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 16, 2026 · View company records in RevenueBase
10	Apex Companies	Exact match	Rockville, MD, United StatesHQ recorded Oct 16, 2026	1,001-5,000	1,266 contacts →
	Exact match “Who is Apex?” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
11	Verdantas	Exact match	Tampa, FL, United StatesHQ recorded Oct 16, 2026	1,001-5,000	1,252 contacts →
	Exact match “At Verdantas, we blend engineering and environmental science together with advanced technology and world-renowned labs to create solutions with the big picture in mind.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
12	Triumvirate Environmental	Exact match	Somerville, MA, United StatesHQ recorded Oct 16, 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 16, 2026 · View company records in RevenueBase
13	Braun Intertec Corporation	Exact match	Minneapolis, MN, United StatesHQ recorded Oct 16, 2026	1,001-5,000	1,109 contacts →
	Exact match “At Braun Intertec, we work at the intersection of the natural and built environments, combining science, technology, and engineering.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
14	Barr Engineering CO	Exact match	Minneapolis, MN, United StatesHQ recorded Oct 16, 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 16, 2026 · View company records in RevenueBase
15	Trinity Consultants	Exact match	Dallas, TX, United StatesHQ recorded Oct 16, 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 16, 2026 · View company records in RevenueBase
16	Alliance Technical Group	Exact match	Decatur, AL, United StatesHQ recorded Oct 16, 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 16, 2026 · View company records in RevenueBase
17	IEA	Exact match	Brooklyn Park, MN, United StatesHQ recorded Oct 16, 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 16, 2026 · View company records in RevenueBase
18	ATC Group Services LLC	Exact match	Lafayette, LA, United StatesHQ recorded Oct 16, 2026	1,001-5,000	872 contacts →
	Exact match “ATC Group Services LLC is now Atlas.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
19	Montrose Environmental Group	Exact match	Little Rock, AR, United StatesHQ recorded Oct 16, 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 16, 2026 · View company records in RevenueBase
20	The Foth Companies	Exact match	De Pere, WI, United StatesHQ recorded Oct 16, 2026	501-1,000	812 contacts →
	Exact match “By combining science, engineering, and technology with a true collaborative spirit, Foth has delivered innovative solutions to our clients since 1938.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
21	DUDEK	Exact match	Encinitas, CA, United StatesHQ recorded Oct 16, 2026	501-1,000	807 contacts →
	Exact match “Dudek is an environmental, planning, and engineering consulting firm.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
22	Environmental Science Associates	Exact match	San Francisco, CA, United StatesHQ recorded Oct 16, 2026	501-1,000	730 contacts →
	Exact match “ESA is a 100% employee-owned environmental consulting firm.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
23	Antea Group USA	Exact match	St. Paul, MN, United StatesHQ recorded Oct 16, 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 16, 2026 · View company records in RevenueBase
24	Raba Kistner, INC	Exact match	San Antonio, TX, United StatesHQ recorded Oct 16, 2026	501-1,000	602 contacts →
	Exact match “Founded in 1968, Raba Kistner Inc.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
25	Trihydro Corporation	Exact match	Laramie, WY, United StatesHQ recorded Oct 16, 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 16, 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 “industrial environmental consultants”. 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 4,069 industrial environmental consultants based in the United States

See the full list, filter by size, metro and specialty, and access 54,682 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Industrial environmental consultants based in the United States at a glance

As of Oct 16, 2026

41.0%Verified-email coverage

32.8Average contacts per company

1-10Median size (employees)

2.6%Largest-city concentration · Houston

Oct 16, 2026Page data refreshed

Companies by employee count

1-10

2,079

11-50

1,403

51-200

418

201-500

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 4,069 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 “industrial environmental consultants” 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 54,682 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 16, 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.

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

How many industrial environmental consultants are there based in the United States?

RevenueBase identified 4,069 company matches for industrial environmental consultants 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?

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

Which city has the most industrial environmental consultants?

Houston leads with 106 company records, followed by New York (45) and Austin (39).

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 54,682 professional contacts with verified work emails tracked across these 4,069 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 16, 2026.

Ready to reach these companies? Verified emails and direct dials for all 4,069 industrial environmental consultants based in the United States. Start with a free account, no credit card.

Download this list →

Related lists

Industrial environmental consultants by geography

Browse the directory

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.