Company lists · Data refreshed September 2026

Top 25 Brownfield remediation companies based in the United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 1,508 companies tracked

RevenueBase identified 1,508 brownfield remediation companies headquartered in the United States as of September 2026 and tracks 30,639 professional contacts across them, including 12,231 with verified work emails. Houston is the largest hub.

This list covers brownfield remediation companies 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 19, 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 19, 2026 86% judged on-target in blind review

1,508Companies

30,639Contacts tracked

12,231Verified emails

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The 25 largest brownfield remediation companies based in the United States

Ranked by team size

Top 25 of 1,508 brownfield remediation companies based in the United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to brownfield remediation companies: 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	ECC	Indirect evidence	Burlingame, CA, United StatesHQ checked Sep 19, 2026	n/a	2,040 contacts →
	Indirect evidence “ECC is an employee-owned company that consistently ranks among the top construction and environmental companies in the world.” Source: RevenueBase Database · checked Sep 19, 2026
2	Montrose Environmental Group	Indirect evidence	Little Rock, AR, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,529 contacts →
	Indirect 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 19, 2026
3	Weston Solutions, INC	Indirect evidence	West Chester, PA, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,441 contacts →
	Indirect evidence “Weston Solutions, Inc.(Weston) is a 100% employee-owned environmental and infrastructure services firm committed to safety and providing measurable client value.” Source: RevenueBase Database · checked Sep 19, 2026
4	Entact, LLC	Partial evidence	Westmont, IL, United StatesHQ checked Sep 19, 2026	501-1,000	483 contacts →
	Partial 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 19, 2026
5	Groundwater & Environmental Services, INC	Indirect evidence	Wall Township, NJ, United StatesHQ checked Sep 19, 2026	201-500	447 contacts →
	Indirect evidence “We are Groundwater & Environmental Services, Inc, better known as GES.” Source: RevenueBase Database · checked Sep 19, 2026
6	ROUX	Indirect evidence	Islandia, NY, United StatesHQ checked Sep 19, 2026	201-500	433 contacts →
	Indirect 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 19, 2026
7	Hydrogeologic, INC	Partial evidence	Reston, VA, United StatesHQ checked Sep 19, 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 19, 2026
8	Sevenson Environmental Services INC	Indirect evidence	Niagara Falls, NY, United StatesHQ checked Sep 19, 2026	501-1,000	277 contacts →
	Indirect evidence “Sevenson Environmental Services, Inc.” Source: RevenueBase Database · checked Sep 19, 2026
9	Environmental Restoration LLC	Partial evidence	Saint Louis, MO, United StatesHQ checked Sep 19, 2026	201-500	273 contacts →
	Partial 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 19, 2026
10	Forgen	Indirect evidence	Centennial, CO, United StatesHQ checked Sep 19, 2026	201-500	255 contacts →
	Indirect evidence “At Forgen, we leave the planet better than we found it.” Source: RevenueBase Database · checked Sep 19, 2026
11	Alliance Environmental Group, LLC	Indirect evidence	Azusa, CA, United StatesHQ checked Sep 19, 2026	501-1,000	254 contacts →
	Indirect evidence “Alliance is one of the most experienced and trusted environmental contractors in California.” Source: RevenueBase Database · checked Sep 19, 2026
12	Cascade Environmental, LLC	Partial evidence	Bothell, WA, United StatesHQ checked Sep 19, 2026	1,001-5,000	248 contacts →
	Partial evidence “CASCADE is the leading provider of environmental and geotechnical drilling, site investigation and environmental remediation.” Source: RevenueBase Database · checked Sep 19, 2026
13	Environmental Works, INC	Indirect evidence	Springfield, MO, United StatesHQ checked Sep 19, 2026	201-500	238 contacts →
	Indirect evidence “Environmental Works, Inc.(EWI) offers truly comprehensive environmental solutions for a variety of industries, businesses, and municipalities.” Source: RevenueBase Database · checked Sep 19, 2026
14	Miller Environmental Group, INC	Partial evidence	Calverton, NY, United StatesHQ checked Sep 19, 2026	201-500	231 contacts →
	Partial 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 19, 2026
15	Envirocon	Indirect evidence	Missoula, MT, United StatesHQ checked Sep 19, 2026	201-500	225 contacts →
	Indirect 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 19, 2026
16	Patriot Environmental Services	Indirect evidence	Signal Hill, CA, United StatesHQ checked Sep 19, 2026	201-500	223 contacts →
	Indirect 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 19, 2026
17	Cape Environmental Management INC	Partial evidence	Norcross, GA, United StatesHQ checked Sep 19, 2026	51-200	221 contacts →
	Partial 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 19, 2026
18	Remedial Construction Services, L.P. Recon	Partial evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	201-500	215 contacts →
	Partial evidence “Since 1989, RECON has successfully completed over environmental remediation, geotechnical, and mine reclamation projects.” Source: RevenueBase Database · checked Sep 19, 2026
19	August Mack Environmental, INC	Indirect evidence	Indianapolis, IN, United StatesHQ checked Sep 19, 2026	51-200	210 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
20	Hillmann Consulting, LLC	Partial evidence	Union, NJ, United StatesHQ checked Sep 19, 2026	201-500	209 contacts →
	Partial 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 19, 2026
21	American Integrated Services, INC	Partial evidence	Wilimington, United StatesHQ checked Sep 19, 2026	201-500	200 contacts →
	Partial 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 19, 2026
22	Kemron Environmental Services	Indirect evidence	Atlanta, United StatesHQ checked Sep 19, 2026	201-500	188 contacts →
	Indirect evidence “With more than 50 years of excellence, KEMRON Environmental Services, Inc.” Source: RevenueBase Database · checked Sep 19, 2026
23	BAY West LLC	Partial evidence	St. Paul, MN, United StatesHQ checked Sep 19, 2026	201-500	187 contacts →
	Partial 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 19, 2026
24	Brandenburg Industrial Service Company	Partial evidence	Elmhurst, IN, United StatesHQ checked Sep 19, 2026	501-1,000	181 contacts →
	Partial evidence “Brandenburg, established in 1968, is one of the nation’s premier firms specializing in demolition and environmental remediation, which includes asbestos abatement, hazardous…” Source: RevenueBase Database · checked Sep 19, 2026
25	Herrera Environmental Consultants	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 19, 2026	51-200	176 contacts →
	Indirect evidence “Herrera Environmental Consultants is a leading engineering and scientific consulting firm focused on restoration, water, and sustainable development.” Source: RevenueBase Database · checked Sep 19, 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: brownfield remediation companies. 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 brownfield remediation companies.
Partial evidence: Its own public description names part of brownfield remediation companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name brownfield remediation companies. 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 1,508 brownfield remediation companies based in the United States

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Brownfield remediation companies based in the United States at a glance

As of Sep 19, 2026

39.9%Verified-email coverage

20.3Average contacts per company

11-50Median size (employees)

1.4%Largest-city concentration · Houston

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

551

11-50

651

51-200

222

201-500

501-1,000

1,001-5,000

5,001-10,000

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 1,508 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 brownfield remediation companies, 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 “brownfield remediation companies”. 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 brownfield remediation companies), 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 brownfield remediation companies, 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, 12,231 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 19, 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 brownfield remediation companies, 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 brownfield remediation companies are there based in the United States?

RevenueBase identified 1,508 brownfield remediation companies 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?

ECC, headquartered in Burlingame, tops this list with the largest team on record.

Which city has the most brownfield remediation companies?

Houston leads with 21 headquartered companies, followed by Denver (20) and New York (16).

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 12,231 verified decision-maker contacts tracked across these 1,508 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 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 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.