Company lists · Data refreshed September 2026

Top 25 Industrial hygiene companies based in the United States

Name: Industrial hygiene 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 17, 2026 2,496 companies tracked

RevenueBase identified 2,496 industrial hygiene companies headquartered in the United States as of September 2026 and tracks 35,789 professional contacts across them, including 13,053 with verified work emails. Houston is the largest hub.

This list covers industrial hygiene 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 17, 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 17, 2026 86% judged on-target in blind review

2,496Companies

35,789Contacts tracked

13,053Verified emails

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The 25 largest industrial hygiene companies based in the United States

Ranked by team size

Top 25 of 2,496 industrial hygiene companies based in the United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to industrial hygiene 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	Total Safety	Indirect evidence	Pasadena, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	2,650 contacts →
	Indirect evidence “Total Safety is the world's premier provider of integrated safety and compliance services and the products necessary to support them, including gas detection, respiratory…” Source: RevenueBase Database · checked Sep 17, 2026
2	IEA	Indirect evidence	Brooklyn Park, MN, United StatesHQ checked Sep 17, 2026	n/a	982 contacts →
	Indirect evidence “The Institute for Environmental Assessment, Inc.(IEA) is small business committed to providing trusted environmental safety consulting services for private and public…” Source: RevenueBase Database · checked Sep 17, 2026
3	Antea Group USA	Indirect evidence	St Paul, MN, United StatesHQ checked Sep 17, 2026	1,001-5,000	658 contacts →
	Indirect evidence “Antea Group is an international engineering and environmental consulting firm specializing in full-service solutions in the fields of environment, health and safety, and…” Source: RevenueBase Database · checked Sep 17, 2026
4	Ensafe	Indirect evidence	Memphis, TN, United StatesHQ checked Sep 17, 2026	201-500	463 contacts →
	Indirect evidence “Innovation is not happenstance at EnSafe Inc.” Source: RevenueBase Database · checked Sep 17, 2026
5	ROUX	Indirect evidence	Islandia, NY, United StatesHQ checked Sep 17, 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 17, 2026
6	CTEH	Indirect evidence	North Little Rock, AR, United StatesHQ checked Sep 17, 2026	201-500	336 contacts →
	Indirect evidence “CTEH, LLC's purpose is preparing for and responding to a company's or community’s worst day.” Source: RevenueBase Database · checked Sep 17, 2026
7	All4	Indirect evidence	Kimberton, PA, United StatesHQ checked Sep 17, 2026	201-500	331 contacts →
	Indirect evidence “ALL4 is a global consulting firm committed to shaping a sustainable future through innovative environmental, health, and safety (EHS) and digital solutions.” Source: RevenueBase Database · checked Sep 17, 2026
8	Mesa Laboratories, INC	Indirect evidence	Lakewood, CO, United StatesHQ checked Sep 17, 2026	501-1,000	323 contacts →
	Indirect evidence “Mesa Labs helps you monitor and maintain higher standards in any environment – from the air we breathe to the critical moments of life-saving care.” Source: RevenueBase Database · checked Sep 17, 2026
9	Examinetics	Indirect evidence	Overland Park, KS, United StatesHQ checked Sep 17, 2026	201-500	274 contacts →
	Indirect evidence “Examinetics is the leading provider of occupational health solutions, offering services across the entire employee lifecycle with several delivery methods.” Source: RevenueBase Database · checked Sep 17, 2026
10	GSI Environmental INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	201-500	259 contacts →
	Indirect evidence “GSI Environmental, Inc.(GSI), is an environmental engineering and science consulting firm committed to measuring, analyzing, and solving complex environmental problems around the…” Source: RevenueBase Database · checked Sep 17, 2026
11	Ancon Services	Partial evidence	Los Alamitos, CA, United StatesHQ checked Sep 17, 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 17, 2026
12	Justrite Safety Group	Partial evidence	Deerfield, IL, United StatesHQ checked Sep 17, 2026	1,001-5,000	243 contacts →
	Partial evidence “Justrite Safety Group (JSG) manufactures and provides industrial safety solutions.” Source: RevenueBase Database · checked Sep 17, 2026
13	August Mack Environmental, INC	Indirect evidence	Indianapolis, IN, United StatesHQ checked Sep 17, 2026	51-200	210 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
14	Hillmann Consulting, LLC	Partial evidence	Union, NJ, United StatesHQ checked Sep 17, 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 17, 2026
15	Bakerrisk	Indirect evidence	San Antonio, TX, United StatesHQ checked Sep 17, 2026	201-500	202 contacts →
	Indirect evidence “Risk Management.” Source: RevenueBase Database · checked Sep 17, 2026
16	BAY West LLC	Partial evidence	St. Paul, MN, United StatesHQ checked Sep 17, 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 17, 2026
17	Enviroscience, INC	Indirect evidence	Stow, OH, United StatesHQ checked Sep 17, 2026	51-200	176 contacts →
	Indirect evidence “EnviroScience is a team of over 150 expert biologists, commercial divers, environmental engineers, and environmental scientists that provides biomonitoring, environmental…” Source: RevenueBase Database · checked Sep 17, 2026
18	Forensic Analytical Consulting Services, INC	Indirect evidence	Hayward, CA, United StatesHQ checked Sep 17, 2026	51-200	172 contacts →
	Indirect evidence “With a staff of over 150 employees in the San Francisco, Sacramento, Los Angeles, San Diego, Modesto, Bakersfield, Fresno, Portland, Chicago, and Grand Rapids offices, Forensic…” Source: RevenueBase Database · checked Sep 17, 2026
19	Environmental Health & Engineering	Indirect evidence	Newton, MA, United StatesHQ checked Sep 17, 2026	51-200	170 contacts →
	Indirect evidence “EH & E delivers integrated environmental, engineering, and health and safety solutions that help businesses and institutions safeguard their assets, improve operations and boost…” Source: RevenueBase Database · checked Sep 17, 2026
20	Gradient	Indirect evidence	Boston, MA, United StatesHQ checked Sep 17, 2026	51-200	159 contacts →
	Indirect evidence “Gradient is an environmental and risk science consulting firm renowned for our specialties in Toxicology, Epidemiology, Risk Assessment, Product Safety, Contaminant Fate and…” Source: RevenueBase Database · checked Sep 17, 2026
21	Cleanair Engineering	Indirect evidence	Palatine, IL, United StatesHQ checked Sep 17, 2026	51-200	152 contacts →
	Indirect evidence “Since its founding in 1972, CleanAir has an established reputation for excellence on projects of all sizes, ranging from boiler, APC equipment and cooling tower efficiency testing…” Source: RevenueBase Database · checked Sep 17, 2026
22	Mostardi Platt	Indirect evidence	Elmhurst, IL, United StatesHQ checked Sep 17, 2026	51-200	140 contacts →
	Indirect 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 17, 2026
23	E3 Environmental	Partial evidence	Clinton, MS, United StatesHQ checked Sep 17, 2026	201-500	139 contacts →
	Partial evidence “E3 Environmental sets a high standard for environmental and industrial services, prioritizing safety, urgency, and efficiency.” Source: RevenueBase Database · checked Sep 17, 2026
24	Waco, INC	Partial evidence	Sandston, VA, United StatesHQ checked Sep 17, 2026	201-500	139 contacts →
	Partial evidence “Virginia's leading contractor for Industrial Mechanical Services, Asbestos Removal, Lead and Mold Remediation, Industrial Cleaning, Demolition, Insulation.” Source: RevenueBase Database · checked Sep 17, 2026
25	Ensolum, LLC	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 17, 2026	51-200	136 contacts →
	Indirect evidence “OUR MISSION is to combine sustainable environmental solutions with forward-thinking, cost-effective, innovative, and value-added technologies that balance our clients’ economic…” Source: RevenueBase Database · checked Sep 17, 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: industrial hygiene 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 industrial hygiene companies.
Partial evidence: Its own public description names part of industrial hygiene companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name industrial hygiene 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 2,496 industrial hygiene companies based in the United States

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Industrial hygiene companies based in the United States at a glance

As of Sep 17, 2026

36.5%Verified-email coverage

14.3Average contacts per company

1-10Median size (employees)

2.6%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

1,344

11-50

819

51-200

258

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 2,496 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 industrial hygiene 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 “industrial hygiene 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 industrial hygiene 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 industrial hygiene 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, 13,053 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 17, 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.

Industrial hygiene companies by metro

Industrial hygiene companies in Houston66
Industrial hygiene companies in New York32

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 industrial hygiene 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 industrial hygiene companies are there based in the United States?

RevenueBase identified 2,496 industrial hygiene 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?

Total Safety, headquartered in Pasadena, tops this list with the largest team on record.

Which city has the most industrial hygiene companies?

Houston leads with 66 headquartered companies, followed by New York (32) and Chicago (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 13,053 verified decision-maker contacts tracked across these 2,496 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 17, 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.