Company lists · Data refreshed September 2026

Top 25 Environmental permit data providers based in the United States

Name: Environmental permit data providers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 12, 2026 599 companies tracked

RevenueBase identified 599 environmental permit data providers headquartered in the United States as of September 2026 and tracks 11,254 professional contacts across them, including 4,795 with verified work emails and 4,507 with mobile numbers. Houston is the largest hub.

This list covers environmental permit data providers headquartered in the United States, 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 12, 2026.

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 12, 2026 86% judged on-target in blind review

599Companies

11,254Contacts tracked

4,795Verified emails

4,507Mobile numbers

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The 25 largest environmental permit data providers based in the United States

Ranked by team size

Top 25 of 599 environmental permit data providers based in the United States, ranked by team size, largest first. Data refreshed Sep 12, 2026. RevenueBase Smart Search rates how each company's information relates to environmental permit data providers: 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	Adec Innovations	Partial evidence	Irvine, CA, United StatesHQ checked Sep 12, 2026	1,001-5,000	1,304 contacts →
	Partial evidence “ADEC Innovations seamlessly delivers fully integrated, cost-effective industry expertise, business process & data management, and software services.” Source: RevenueBase Database · checked Sep 12, 2026
2	Alliance Technical Group	Partial evidence	Decatur, AL, United StatesHQ checked Sep 12, 2026	1,001-5,000	956 contacts →
	Partial 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 12, 2026
3	Groundwater & Environmental Services, INC	Partial evidence	Wall Township, NJ, United StatesHQ checked Sep 12, 2026	201-500	447 contacts →
	Partial evidence “We are Groundwater & Environmental Services, Inc, better known as GES.” Source: RevenueBase Database · checked Sep 12, 2026
4	Western Ecosystems Technology, Inc. West	Partial evidence	Cheyenne, WY, United StatesHQ checked Sep 12, 2026	201-500	408 contacts →
	Partial evidence “WEST provides environmental and statistical consulting services and contract research nationally and internationally to industry, government, and private organizations.” Source: RevenueBase Database · checked Sep 12, 2026
5	Environmental Works, INC	Partial evidence	Springfield, MO, United StatesHQ checked Sep 12, 2026	201-500	238 contacts →
	Partial evidence “Environmental Works, Inc.(EWI) offers truly comprehensive environmental solutions for a variety of industries, businesses, and municipalities.” Source: RevenueBase Database · checked Sep 12, 2026
6	Metiri Group	Partial evidence	Clovis, CA, United StatesHQ checked Sep 12, 2026	n/a	233 contacts →
	Partial evidence “Appl Inc is an environmental services company based out of 908 N Temperance Ave, Clovis, CA, United States.” Source: RevenueBase Database · checked Sep 12, 2026
7	Patriot Environmental Services	Partial evidence	Signal Hill, CA, United StatesHQ checked Sep 12, 2026	201-500	223 contacts →
	Partial evidence “Patriot Environmental Services, a Crystal Clean company, is a leading environmental service provider with clients throughout the Southwestern United States.” Source: RevenueBase Database · checked Sep 12, 2026
8	Plateau GRP	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 12, 2026	51-200	192 contacts →
	Indirect evidence “Plateau Grp provides innovative and agile IT solutions to customer challenges.” Source: RevenueBase Database · checked Sep 12, 2026
9	Earthsoft	Strong evidence	Pensacola, FL, United StatesHQ checked Sep 12, 2026	51-200	168 contacts →
	Strong evidence “EarthSoft is the recognized leader in providing environmental and geotechnical data management and decision support systems for industrial organizations, government agencies…” Source: RevenueBase Database · checked Sep 12, 2026
10	Ecorp Consulting, INC	Indirect evidence	Rocklin, CA, United StatesHQ checked Sep 12, 2026	51-200	166 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 12, 2026
11	Advanced Environmental Laboratories, INC	Partial evidence	Jacksonville, FL, United StatesHQ checked Sep 12, 2026	51-200	158 contacts →
	Partial evidence “Advanced Environmental Laboratories, Inc.(AEL) is a NELAP/TNI and DOD certified, national full-service laboratory firm, headquartered in Jacksonville, Florida, with additional…” Source: RevenueBase Database · checked Sep 12, 2026
12	Mostardi Platt	Partial evidence	Elmhurst, IL, United StatesHQ checked Sep 12, 2026	51-200	140 contacts →
	Partial evidence “Since the passage of original environmental legislation nearly four decades ago, both private and public industry have turned to Mostardi Platt for guidance in complying with air…” Source: RevenueBase Database · checked Sep 12, 2026
13	Ensero Solutions	Strong evidence	Fort Collins, CO, United StatesHQ checked Sep 12, 2026	51-200	129 contacts →
	Strong evidence “Ensero Solutions is an environmental consulting and remediation business with specific expertise in environmental assessments and permitting solutions, mine water management…” Source: RevenueBase Database · checked Sep 12, 2026
14	Edge Engineering And Science, LLC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 12, 2026	51-200	116 contacts →
	Indirect evidence “Edge Engineering & Science, LLC (EDGE) is a privately owned professional services firm headquartered in Houston, Texas.” Source: RevenueBase Database · checked Sep 12, 2026
15	Metiri Group	Partial evidence	Geneva, IL, United StatesHQ checked Sep 12, 2026	201-500	112 contacts →
	Partial evidence “Established in 2019, Metiri Group has focused on using full-service environmental laboratories to deliver testing services to inform the decisions that improve the lives of people…” Source: RevenueBase Database · checked Sep 12, 2026
16	Hart & Hickman, PC	Partial evidence	Charlotte, NC, United StatesHQ checked Sep 12, 2026	51-200	103 contacts →
	Partial evidence “Hart & Hickman PC provides environmental consulting services to commercial, industrial, and governmental clients throughout the Southeast US.” Source: RevenueBase Database · checked Sep 12, 2026
17	Perennial Environmental Services	Partial evidence	Houston, TX, United StatesHQ checked Sep 12, 2026	51-200	102 contacts →
	Partial evidence “Perennial Environmental Services, LLC, has been providing technical environmental solutions and management with fresh perspectives and unparalleled efficiency since 2003.” Source: RevenueBase Database · checked Sep 12, 2026
18	CK Associates Environmental Consultants	Partial evidence	Baton Rouge, LA, United StatesHQ checked Sep 12, 2026	51-200	101 contacts →
	Partial evidence “CK Associates is an environmental consulting firm that is fully owned by its employees.” Source: RevenueBase Database · checked Sep 12, 2026
19	Chambers Group, INC	Partial evidence	Costa Mesa, CA, United StatesHQ checked Sep 12, 2026	51-200	98 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 12, 2026
20	A-Tech Consulting, INC	Indirect evidence	Orange, CA, United StatesHQ checked Sep 12, 2026	51-200	97 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 12, 2026
21	Yorke Engineering, LLC	Indirect evidence	San Juan Capistrano, CA, United StatesHQ checked Sep 12, 2026	51-200	92 contacts →
	Indirect evidence “Yorke Engineering, LLC (Yorke) was founded in 1996 and specializes in air quality, waste, storm water and industrial hygiene/safety services.” Source: RevenueBase Database · checked Sep 12, 2026
22	Ddms, INC	Strong evidence	St Paul, MN, United StatesHQ checked Sep 12, 2026	51-200	70 contacts →
	Strong evidence “de maximis Data Management Solutions (ddms) is a service-oriented company that provides world-class environmental data management, data validation, visualization and enterprise…” Source: RevenueBase Database · checked Sep 12, 2026
23	Cgrs INC	Indirect evidence	Fort Collins, CO, United StatesHQ checked Sep 12, 2026	51-200	70 contacts →
	Indirect evidence “We deliver quality solutions with integrity and expertise, every time.” Source: RevenueBase Database · checked Sep 12, 2026
24	Environmental Services, Inc., A Terracon Company	Partial evidence	Jacksonville, FL, United StatesHQ checked Sep 12, 2026	51-200	70 contacts →
	Partial evidence “Environmental Services, Inc.(ESI) is a leading full service environmental consulting firm with national and international experience.” Source: RevenueBase Database · checked Sep 12, 2026
25	Stone Environmental	Partial evidence	Montpelier, VT, United StatesHQ checked Sep 12, 2026	51-200	65 contacts →
	Partial evidence “Stone Environmental is a 100% employee-owned environmental science and engineering firm based in Montpelier, Vermont.” Source: RevenueBase Database · checked Sep 12, 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: environmental permit data providers. 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 environmental permit data providers.
Partial evidence: Its own public description names part of environmental permit data providers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name environmental permit data providers. 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 599 environmental permit data providers based in the United States

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Environmental permit data providers based in the United States at a glance

As of Sep 12, 2026

42.6%Verified-email coverage

40.0%Mobile-number coverage

18.8Average contacts per company

11-50Median size (employees)

3.5%Largest-city concentration · Houston

Sep 12, 2026Page data refreshed

Companies by employee count

1-10

299

11-50

229

51-200

201-500

1,001-5,000

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 15.0d

4,0560–30

70931–60

1761–90

190–180

12180+

Company record updated

Median 75.0d

00–30

4,12531–60

5,32861–90

1,31590–180

486180+

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 environmental permit data providers, 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.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “environmental permit data providers”. 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 environmental permit data providers), 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 environmental permit data providers, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
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, 4,795 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 12, 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.

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 environmental permit data providers, 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 environmental permit data providers are there based in the United States?

RevenueBase identified 599 environmental permit data providers headquartered in the United States 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?

Adec Innovations, headquartered in Irvine, tops this list with the largest team on record.

Which city has the most environmental permit data providers?

Houston leads with 21 headquartered companies, followed by Tampa (9) and Seattle (8).

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 4,795 verified decision-maker contacts tracked across these 599 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 12, 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.