Company lists · Data refreshed September 2026

Top 25 Environmental remediation contractors based in the United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 2,511 companies tracked

RevenueBase identified 2,511 environmental remediation contractors headquartered in the United States as of September 2026 and tracks 53,895 professional contacts across them, including 17,604 with verified work emails. Houston is the largest hub.

This list covers environmental remediation contractors 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 16, 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 16, 2026 86% judged on-target in blind review

2,511Companies

53,895Contacts tracked

17,604Verified emails

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The 25 largest environmental remediation contractors based in the United States

Ranked by team size

Top 25 of 2,511 environmental remediation contractors based in the United States, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to environmental remediation contractors: 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	Clean Harbors	Partial evidence	Norwell, MA, United StatesHQ checked Sep 16, 2026	10001+	8,924 contacts →
	Partial evidence “Clean Harbors is North America’s leading provider of environmental and industrial services.” Source: RevenueBase Database · checked Sep 16, 2026
2	Montrose Environmental Group	Partial evidence	Little Rock, AR, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,529 contacts →
	Partial evidence “Onterris (formerly Montrose Environmental Group) was one of the first to see environmental responsibility as not just an imperative but as a strategic asset.” Source: RevenueBase Database · checked Sep 16, 2026
3	Entact, LLC	Strong evidence	Westmont, IL, United StatesHQ checked Sep 16, 2026	501-1,000	483 contacts →
	Strong evidence “ENTACT is the partner of choice in solving our customer's most complex environmental remediation and geotechnical infrastructure challenges.” Source: RevenueBase Database · checked Sep 16, 2026
4	ROUX	Partial evidence	Islandia, NY, United StatesHQ checked Sep 16, 2026	201-500	433 contacts →
	Partial evidence “Founded 40 years ago, Roux is recognized for being a highly effective, client-focused environmental consulting and management firm.” Source: RevenueBase Database · checked Sep 16, 2026
5	Hydrogeologic, INC	Partial evidence	Reston, VA, United StatesHQ checked Sep 16, 2026	501-1,000	430 contacts →
	Partial evidence “HydroGeoLogic, Inc.(HGL) is an employee-owned company with over 36 years of experience developing innovative, effective, and sustainable engineering and remediation solutions to…” Source: RevenueBase Database · checked Sep 16, 2026
6	Hepaco, LLC	Partial evidence	Charlotte, NC, United StatesHQ checked Sep 16, 2026	501-1,000	428 contacts →
	Partial evidence “HEPACO is the premier environmental and emergency services company in the Eastern United States with coverage across 40+ regional offices.” Source: RevenueBase Database · checked Sep 16, 2026
7	Sevenson Environmental Services INC	Partial evidence	Niagara Falls, NY, United StatesHQ checked Sep 16, 2026	501-1,000	277 contacts →
	Partial evidence “Sevenson Environmental Services, Inc.” Source: RevenueBase Database · checked Sep 16, 2026
8	Environmental Restoration LLC	Strong evidence	Saint Louis, MO, United StatesHQ checked Sep 16, 2026	201-500	273 contacts →
	Strong evidence “Environmental Restoration LLC (ER) is 100% employee-owned and provides Environmental Site Remediation, Construction and Emergency Response services for hazardous waste materials…” Source: RevenueBase Database · checked Sep 16, 2026
9	Forgen	Indirect evidence	Centennial, CO, United StatesHQ checked Sep 16, 2026	201-500	255 contacts →
	Indirect evidence “At Forgen, we leave the planet better than we found it.” Source: RevenueBase Database · checked Sep 16, 2026
10	Alliance Environmental Group, LLC	Strong evidence	Azusa, CA, United StatesHQ checked Sep 16, 2026	501-1,000	254 contacts →
	Strong evidence “Alliance is one of the most experienced and trusted environmental contractors in California.” Source: RevenueBase Database · checked Sep 16, 2026
11	Cascade Environmental, LLC	Strong evidence	Bothell, WA, United StatesHQ checked Sep 16, 2026	1,001-5,000	248 contacts →
	Strong evidence “CASCADE is the leading provider of environmental and geotechnical drilling, site investigation and environmental remediation.” Source: RevenueBase Database · checked Sep 16, 2026
12	Ancon Services	Partial evidence	Los Alamitos, CA, United StatesHQ checked Sep 16, 2026	501-1,000	248 contacts →
	Partial evidence “Founded in 1968, Ancon Services has expanded our services to cover virtually all of our clients industrial and environmental needs.” Source: RevenueBase Database · checked Sep 16, 2026
13	Environmental Works, INC	Partial evidence	Springfield, MO, United StatesHQ checked Sep 16, 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 16, 2026
14	Miller Environmental Group, INC	Strong evidence	Calverton, NY, United StatesHQ checked Sep 16, 2026	201-500	231 contacts →
	Strong evidence “Miller Environmental Group is a leading environmental response, remediation and restoration services company, providing industry, government, commercial and residential customers…” Source: RevenueBase Database · checked Sep 16, 2026
15	Superior Environmental Solutions, LLC	Partial evidence	Cincinnati, OH, United StatesHQ checked Sep 16, 2026	501-1,000	225 contacts →
	Partial evidence “Superior Environmental Solutions, LLC (SES) is an industrial cleaning service company founded in response to the growing need for a superior and cost effective service provider.” Source: RevenueBase Database · checked Sep 16, 2026
16	Envirocon	Partial evidence	Missoula, MT, United StatesHQ checked Sep 16, 2026	201-500	225 contacts →
	Partial evidence “Envirocon safely and reliably delivers projects that protect, remediate, and restore our environment for commercial and government clients nationwide.” Source: RevenueBase Database · checked Sep 16, 2026
17	Patriot Environmental Services	Partial evidence	Signal Hill, CA, United StatesHQ checked Sep 16, 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 16, 2026
18	Cape Environmental Management INC	Strong evidence	Norcross, GA, United StatesHQ checked Sep 16, 2026	51-200	221 contacts →
	Strong evidence “CAPE is an award-winning environmental remediation and infrastructure construction firm with a history of delivering excellence since 1985.” Source: RevenueBase Database · checked Sep 16, 2026
19	Remedial Construction Services, L.P. Recon	Strong evidence	Houston, TX, United StatesHQ checked Sep 16, 2026	201-500	215 contacts →
	Strong evidence “Since 1989, RECON has successfully completed over environmental remediation, geotechnical, and mine reclamation projects.” Source: RevenueBase Database · checked Sep 16, 2026
20	August Mack Environmental, INC	Indirect evidence	Indianapolis, IN, United StatesHQ checked Sep 16, 2026	51-200	210 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
21	Hillmann Consulting, LLC	Strong evidence	Union, NJ, United StatesHQ checked Sep 16, 2026	201-500	209 contacts →
	Strong evidence “Hillmann has been a well-recognized leader in the Environmental Health & Safety, Due Diligence & Remediation Management, and Construction Services industries since 1985.” Source: RevenueBase Database · checked Sep 16, 2026
22	Moran Environmental Recovery, LLC	Indirect evidence	Randolph, MA, United StatesHQ checked Sep 16, 2026	501-1,000	205 contacts →
	Indirect evidence “MER provides specialized services to clients within the specific Energy & Industrial, Marine, Railroad and Government sectors throughout the United States.” Source: RevenueBase Database · checked Sep 16, 2026
23	American Integrated Services, INC	Strong evidence	Wilimington, United StatesHQ checked Sep 16, 2026	201-500	200 contacts →
	Strong evidence “American Integrated Services, Inc.(AIS) offers comprehensive solutions through environmental construction and remediation, industrial demolition, abatement, 24/7 emergency…” Source: RevenueBase Database · checked Sep 16, 2026
24	Kemron Environmental Services	Partial evidence	Atlanta, United StatesHQ checked Sep 16, 2026	201-500	188 contacts →
	Partial evidence “With more than 50 years of excellence, KEMRON Environmental Services, Inc.” Source: RevenueBase Database · checked Sep 16, 2026
25	BAY West LLC	Strong evidence	St. Paul, MN, United StatesHQ checked Sep 16, 2026	201-500	187 contacts →
	Strong evidence “Bay West is an environmental and industrial services provider for site investigations, groundwater and soil remediation, munitions cleanup, hazardous waste management, industrial…” Source: RevenueBase Database · checked Sep 16, 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 remediation contractors. 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 remediation contractors.
Partial evidence: Its own public description names part of environmental remediation contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name environmental remediation contractors. 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 2,511 environmental remediation contractors based in the United States

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Environmental remediation contractors based in the United States at a glance

As of Sep 16, 2026

32.7%Verified-email coverage

21.5Average contacts per company

11-50Median size (employees)

1.5%Largest-city concentration · Houston

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

929

11-50

1,057

51-200

374

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 2,511 companies.

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 remediation contractors, 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 remediation contractors”. 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 remediation contractors), 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 remediation contractors, 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, 17,604 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 16, 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.

Environmental remediation contractors by metro

Environmental remediation contractors in Houston38
Environmental remediation contractors in New York31

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 remediation contractors, 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 remediation contractors are there based in the United States?

RevenueBase identified 2,511 environmental remediation contractors 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?

Clean Harbors, headquartered in Norwell, tops this list with the largest team on record.

Which city has the most environmental remediation contractors?

Houston leads with 38 headquartered companies, followed by New York (31) and Denver (24).

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 17,604 verified decision-maker contacts tracked across these 2,511 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 16, 2026.

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Environmental remediation contractors by geography

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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.