Company lists · Data refreshed November 2026

Top 25 Environmental permitting companies based in the United States

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

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 583 companies tracked

RevenueBase identified 583 company matches for environmental permitting companies associated with the United States as of November 2026 and tracks 7,223 professional contacts across them, including 3,748 with verified work emails. Houston is the largest hub.

This list covers company matches for environmental permitting companies 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 November 6, 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 Nov 6, 2026 How this list was built

583Companies

7,223Contacts tracked

3,748Verified emails

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The 25 largest environmental permitting companies based in the United States

Ranked by team size

Top 25 of 583 company matches for environmental permitting companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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	Environmental Science Associates	Exact match	San Francisco, OR, United StatesHQ recorded Nov 6, 2026	501-1,000	748 contacts →
	Exact match “ESA is a 100% employee-owned environmental consulting firm.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	Environmental Consulting & Technology, Inc. ECT	Exact match	Gainesville, FL, United StatesHQ recorded Nov 6, 2026	201-500	335 contacts →
	Exact match “ECT delivers environmental solutions for essential infrastructure.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	Ecorp Consulting, INC	Exact match	Rocklin, CA, United StatesHQ recorded Nov 6, 2026	51-200	175 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	Envirotrac LLC	Exact match	Yaphank, GA, United StatesHQ recorded Nov 6, 2026	51-200	138 contacts →
	Exact match “EnviroTrac Ltd.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	Earthworks Environmental, LLC	Exact match	Phoenix, IL, United StatesHQ recorded Nov 6, 2026	51-200	128 contacts →
	Exact match “America's #1 Stormwater Consultants Earthworks Environmental, LLC provides top of the line storm water pollution prevention (SWPP/NPDES), erosion control and dust control…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	Chambers Group, INC	Exact match	Costa Mesa, CA, United StatesHQ recorded Nov 6, 2026	51-200	109 contacts →
	Exact match “Public agencies and businesses have been relying on Chambers Group to keep them in compliance with applicable federal, state, and/or local environmental laws, regulations, and…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	AKT Peerless	Exact match	Saginaw, IL, United StatesHQ recorded Nov 6, 2026	51-200	107 contacts →
	Exact match “We are environmental consultants and redevelopment experts who are proud to help build sustainable communities.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	EEE Consulting, Inc. 3e	Exact match	Mechanicsville, VA, United StatesHQ recorded Nov 6, 2026	11-50	104 contacts →
	Exact match “Consulting, Inc.(3e) is a dynamic and progressive certified small business that specializes in environmental studies, environmental engineering, environmental education, and…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	Straughan Environmental, INC	Exact match	Columbia, NC, United StatesHQ recorded Nov 6, 2026	51-200	101 contacts →
	Exact match “Straughan Environmental provides high quality & sustainable environmental planning, permitting and design services to government (federal, state, and municipal) and commercial…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	Aspen Environmental Group	Exact match	Agoura Hills, AZ, United StatesHQ recorded Nov 6, 2026	51-200	98 contacts →
	Exact match “Aspen Environmental Group is an expert interdisciplinary environmental impact analysis firm, specializing in the management of environmental assessment efforts under CEQA, NEPA…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	Edwards-Pitman Environmental, INC	Exact match	Atlanta, FL, United StatesHQ recorded Nov 6, 2026	51-200	95 contacts →
	Exact match “Incorporated in 1994, Edwards-Pitman Environmental, Inc.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	Skelly And Loy, Inc., A Terracon Company	Exact match	Harrisburg, MD, United StatesHQ recorded Nov 6, 2026	51-200	95 contacts →
	Exact match “Established in 1969, Skelly and Loy is a privately owned, mid-sized corporation with 6 Mid-Atlantic offices.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	Epsilon Associates, INC	Exact match	Maynard, MA, United StatesHQ recorded Nov 6, 2026	51-200	85 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	Aarc Environmental	Exact match	Houston, FL, United StatesHQ recorded Nov 6, 2026	51-200	79 contacts →
	Exact match “As a leader in the environmental compliance services industry, AARC does more than just meeting the needs of clients today.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Cgrs INC	Exact match	Fort Collins, WA, United StatesHQ recorded Nov 6, 2026	51-200	73 contacts →
	Exact match “We deliver quality solutions with integrity and expertise, every time.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	Bio-Tech Consulting	Exact match	Orlando, FL, United StatesHQ recorded Nov 6, 2026	51-200	73 contacts →
	Exact match “Based in Orlando, Florida, Bio-Tech Consulting (BTC) is a full-service environmental consulting firm with clients throughout Florida and the southeast.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	Environmental Services, Inc., A Terracon Company	Exact match	Jacksonville, GA, United StatesHQ recorded Nov 6, 2026	51-200	73 contacts →
	Exact match “Environmental Services, Inc.(ESI) is a leading full service environmental consulting firm with national and international experience.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	ERO Resources Corporation	Exact match	Lakewood, ID, United StatesHQ recorded Nov 6, 2026	11-50	70 contacts →
	Exact match “We are a team of consultants who specialize in natural resource and environmental assessment, planning, and permitting.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	Bayland Consultants & Designers, INC	Exact match	Hanover, MD, United StatesHQ recorded Nov 6, 2026	11-50	63 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Metric Environmental, LLC	Exact match	Indianapolis, IN, United StatesHQ recorded Nov 6, 2026	51-200	54 contacts →
	Exact match “Metric Environmental, LLC is a DBE/MBE environmental consulting firm headquartered in Indianapolis, Indiana with additional offices in Gary, Indiana, Cincinnati, Ohio and…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Hodges, Harbin, Newberry & Tribble, INC	Exact match	Macon, AR, United StatesHQ recorded Nov 6, 2026	51-200	51 contacts →
	Exact match “Hodges, Harbin, Newberry, & Tribble, Inc.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	Ecolsciences, INC	Exact match	Rockaway, United StatesHQ recorded Nov 6, 2026	11-50	51 contacts →
	Exact match “EcolSciences, Inc, was founded in 1973 in response to the growing need for responsible environmental planning, as mandated by NEPA, The National Environmental Policy Act.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	Endemic Environmental Services, INC	Exact match	Fullerton, CA, United StatesHQ recorded Nov 6, 2026	51-200	47 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	Insignia Environmental	Exact match	Menlo Park, CA, United StatesHQ recorded Nov 6, 2026	11-50	46 contacts →
	Exact match “At Insignia, our mission is to provide a broad range of environmental consulting services with a focus on infrastructure clients and the communities they serve.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	Ecosystem Planning And Restoration	Exact match	Tomball, TX, United StatesHQ recorded Nov 6, 2026	11-50	46 contacts →
	Exact match “EPR was created in 2012 to be a premier environmental planning and ecosystem restoration company.” Recorded in the RevenueBase company graph · Nov 6, 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 permitting companies”. 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 583 environmental permitting companies based in the United States

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Environmental permitting companies based in the United States at a glance

As of Nov 6, 2026

51.9%Verified-email coverage

12.4Average contacts per company

1-10Median size (employees)

2.2%Largest-city concentration · Houston

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

367

11-50

162

51-200

201-500

501-1,000

1,001-5,000

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 583 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 permitting companies” 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 3,748 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 November 6, 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 permitting companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many environmental permitting companies are there based in the United States?

RevenueBase identified 583 company matches for environmental permitting companies associated with the United States as of November 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?

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

Which city has the most environmental permitting companies?

Houston leads with 13 company records, followed by Tampa (11) and San Diego (9).

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 3,748 professional contacts with verified work emails tracked across these 583 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 November 6, 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.