Company lists · Data refreshed September 2026

Top 25 Groundwater remediation companies based in the United States

Name: Groundwater 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 20, 2026 464 companies tracked

RevenueBase identified 464 groundwater remediation companies headquartered in the United States as of September 2026 and tracks 6,722 professional contacts across them, including 2,599 with verified work emails. Houston is the largest hub.

This list covers groundwater 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 20, 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 20, 2026 86% judged on-target in blind review

464Companies

6,722Contacts tracked

2,599Verified emails

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The 25 largest groundwater remediation companies based in the United States

Ranked by team size

Top 25 of 464 groundwater remediation companies based in the United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to groundwater 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	Hydrogeologic, INC	Partial evidence	Reston, VA, United StatesHQ checked Sep 20, 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 20, 2026
2	Environmental Restoration LLC	Partial evidence	Saint Louis, MO, United StatesHQ checked Sep 20, 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 20, 2026
3	Alliance Environmental Group, LLC	Indirect evidence	Azusa, CA, United StatesHQ checked Sep 20, 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 20, 2026
4	Miller Environmental Group, INC	Partial evidence	Calverton, NY, United StatesHQ checked Sep 20, 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 20, 2026
5	Cape Environmental Management INC	Partial evidence	Norcross, GA, United StatesHQ checked Sep 20, 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 20, 2026
6	BAY West LLC	Strong evidence	St. Paul, MN, United StatesHQ checked Sep 20, 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 20, 2026
7	Ensero Solutions	Partial evidence	Fort Collins, CO, United StatesHQ checked Sep 20, 2026	51-200	129 contacts →
	Partial 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 20, 2026
8	USA Environment, LP	Partial evidence	Deer Park, TX, United StatesHQ checked Sep 20, 2026	201-500	118 contacts →
	Partial evidence “ENTACT Acquires USA Environment September 28, 2022 – DALLAS, TX – ENTACT, LLC (“ENTACT”), a leading provider of environmental remediation and geotechnical services and a portfolio…” Source: RevenueBase Database · checked Sep 20, 2026
9	Ampol American Pollution Control, Corp	Indirect evidence	New Iberia, LA, United StatesHQ checked Sep 20, 2026	201-500	113 contacts →
	Indirect evidence “American Pollution Control, Corp.(AMPOL), the industry leader in oil spill response and total environmental solutions, focuses on restoration, going beyond response and cleanup.” Source: RevenueBase Database · checked Sep 20, 2026
10	Regenesis Remediation Solutions	Partial evidence	San Clemente, CA, United StatesHQ checked Sep 20, 2026	51-200	111 contacts →
	Partial evidence “REGENESIS is the global leader in technology-based solutions for the environment with an emphasis on contaminated site remediation.” Source: RevenueBase Database · checked Sep 20, 2026
11	USP Technologies	Indirect evidence	Glen Allen, VA, United StatesHQ checked Sep 20, 2026	51-200	110 contacts →
	Indirect evidence “USP Technologies provides performance-driven, full-service environmental treatment programs to help purify water, wastewater, soil and air.” Source: RevenueBase Database · checked Sep 20, 2026
12	Ground Water Treatment & Technology, LLC	Indirect evidence	Wharton, NJ, United StatesHQ checked Sep 20, 2026	51-200	106 contacts →
	Indirect evidence “GWTT is one of the only U.S.” Source: RevenueBase Database · checked Sep 20, 2026
13	EEC Environmental	Partial evidence	Orange, CA, United StatesHQ checked Sep 20, 2026	11-50	96 contacts →
	Partial evidence “EEC Environmental is a national environmental consulting firm that specializes in water, wastewater, stormwater, regulatory compliance, safety, and assessment and remediation of…” Source: RevenueBase Database · checked Sep 20, 2026
14	A&d Environmental Services	Strong evidence	High Point, NC, United StatesHQ checked Sep 20, 2026	51-200	78 contacts →
	Strong evidence “A&D is a full service environmental remediation and industrial service company specializing in remediation (soil/groundwater,etc.), industrial cleaning and decontamination…” Source: RevenueBase Database · checked Sep 20, 2026
15	Wayne Perry, INC	Indirect evidence	Buena Park, CA, United StatesHQ checked Sep 20, 2026	51-200	76 contacts →
	Indirect evidence “Wayne Perry, Inc.(WPI) is a leader in the environmental and fueling services industry and has been for over 50 years.” Source: RevenueBase Database · checked Sep 20, 2026
16	Isotec Remediation Technologies	Partial evidence	Lawrenceville, NJ, United StatesHQ checked Sep 20, 2026	11-50	76 contacts →
	Partial evidence “ISOTEC Remediation Technologies is a trusted provider of cost-effective, turnkey in-situ remediation solutions for government, commercial/industrial, and residential environmental…” Source: RevenueBase Database · checked Sep 20, 2026
17	A-C-T Environmental & Infrastructure, INC	Indirect evidence	Bartow, FL, United StatesHQ checked Sep 20, 2026	51-200	72 contacts →
	Indirect evidence “Available 24/7/365 for Emergency Response.” Source: RevenueBase Database · checked Sep 20, 2026
18	SCE Environmental Group	Indirect evidence	Lake Ariel, PA, United StatesHQ checked Sep 20, 2026	51-200	67 contacts →
	Indirect evidence “Established in SCE was founded with the intent to offer safe, cost effective environmental services at the highest level of customer satisfaction.” Source: RevenueBase Database · checked Sep 20, 2026
19	XDD Environmental	Partial evidence	Stratham, NH, United StatesHQ checked Sep 20, 2026	11-50	63 contacts →
	Partial evidence “XDD Environmental is recognized nationwide for our expertise and experience with remediation technologies- XDD Principals have been focused in the design and implementation of…” Source: RevenueBase Database · checked Sep 20, 2026
20	Summit Drilling	Indirect evidence	Bridgewater, NJ, United StatesHQ checked Sep 20, 2026	51-200	61 contacts →
	Indirect evidence “Summit is a trusted leader in environmental industry.” Source: RevenueBase Database · checked Sep 20, 2026
21	WRT	Partial evidence	Westminster, CO, United StatesHQ checked Sep 20, 2026	11-50	59 contacts →
	Partial evidence “WRT (WATER REMEDIATION TECHNOLOGY LLC) provides cost-efficient water treatment processes and proprietary treatment media for the removal of radium, uranium, nitrate, chromium, and…” Source: RevenueBase Database · checked Sep 20, 2026
22	Environmental Management Specialists, Inc. EMS	Partial evidence	Cleveland, OH, United StatesHQ checked Sep 20, 2026	51-200	58 contacts →
	Partial evidence “Environmental Management Specialists, Inc.(EMS) is a professional environmental contractor specializing in remediation, emergency response, tank and utility services, and waste…” Source: RevenueBase Database · checked Sep 20, 2026
23	Weisinger Incorporated	Indirect evidence	Willis, TX, United StatesHQ checked Sep 20, 2026	201-500	56 contacts →
	Indirect evidence “Authentic relationships are standard practice at Weisinger Incorporated.” Source: RevenueBase Database · checked Sep 20, 2026
24	Terratherm, INC	Partial evidence	Gardner, MA, United StatesHQ checked Sep 20, 2026	51-200	50 contacts →
	Partial evidence “TerraTherm is a worldwide leader in the development and implementation of in situ thermal remediation of organic contaminants in subsurface source zones.” Source: RevenueBase Database · checked Sep 20, 2026
25	S.S. Papadopulos & Associates, INC	Indirect evidence	Rockville, MD, United StatesHQ checked Sep 20, 2026	51-200	45 contacts →
	Indirect evidence “S.S.” Source: RevenueBase Database · checked Sep 20, 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: groundwater 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 groundwater remediation companies.
Partial evidence: Its own public description names part of groundwater remediation companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name groundwater 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 464 groundwater remediation companies based in the United States

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Groundwater remediation companies based in the United States at a glance

As of Sep 20, 2026

38.7%Verified-email coverage

14.5Average contacts per company

11-50Median size (employees)

1.3%Largest-city concentration · Houston

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

184

11-50

205

51-200

201-500

501-1,000

1,001-5,000

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 464 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 groundwater 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 “groundwater 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 groundwater 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 groundwater 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, 2,599 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 20, 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 groundwater 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 groundwater remediation companies are there based in the United States?

RevenueBase identified 464 groundwater 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?

Hydrogeologic, INC, headquartered in Reston, tops this list with the largest team on record.

Which city has the most groundwater remediation companies?

Houston leads with 6 headquartered companies, followed by San Diego (6) and Oklahoma City (5).

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 2,599 verified decision-maker contacts tracked across these 464 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 20, 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.