Company lists · Data refreshed September 2026

Top 25 Industrial hygiene testing companies based in the United States

Name: Industrial hygiene testing 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 1,072 companies tracked

RevenueBase identified 1,072 company matches for industrial hygiene testing companies associated with the United States as of September 2026 and tracks 15,846 professional contacts across them, including 5,469 with verified work emails. Houston is the largest hub.

This list covers company matches for industrial hygiene testing companies associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 17, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 17, 2026 How this list was built

1,072Companies

15,846Contacts tracked

5,469Verified emails

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The 25 largest industrial hygiene testing companies based in the United States

Ranked by team size

Top 25 of 1,072 company matches for industrial hygiene testing companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 17, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Pace Analytical Services	Exact match	Minneapolis, MN, United StatesHQ recorded Sep 17, 2026	1,001-5,000	2,228 contacts →
	Exact match “Pace® Science and Technology Company makes the world a safer, healthier place.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
2	Emsl Analytical, INC	Exact match	Cinnaminson, NJ, United StatesHQ recorded Sep 17, 2026	501-1,000	719 contacts →
	Exact match “As the nation's leading environmental testing firm, EMSL's network of nationwide laboratories has been providing quality analytical services since 1981.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
3	Enthalpy Analytical	Exact match	North Little Rock, AR, United StatesHQ recorded Sep 17, 2026	501-1,000	349 contacts →
	Exact match “Our laboratory service experts provide clients with precision testing support, innovative scientific approaches, and high-quality data that delivers a sense of certainty.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
4	Alpha Analytical	Exact match	Westborough, MA, United StatesHQ recorded Sep 17, 2026	501-1,000	254 contacts →
	Exact match “Since 1987, Alpha Analytical, Inc.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5	August Mack Environmental, INC	Exact match	Indianapolis, IN, United StatesHQ recorded Sep 17, 2026	51-200	210 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
6	Hillmann Consulting, LLC	Exact match	Union, NJ, United StatesHQ recorded Sep 17, 2026	201-500	209 contacts →
	Exact match “Hillmann has been a well-recognized leader in the Environmental Health & Safety, Due Diligence & Remediation Management, and Construction Services industries since 1985.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
7	RJ LEE Group	Exact match	Pittsburgh, PA, United StatesHQ recorded Sep 17, 2026	201-500	194 contacts →
	Exact match “RJ Lee Group provides comprehensive laboratory testing and scientific consulting services.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
8	Forensic Analytical Consulting Services, INC	Exact match	Hayward, CA, United StatesHQ recorded Sep 17, 2026	51-200	172 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9	Environmental Health & Engineering	Exact match	Newton, MA, United StatesHQ recorded Sep 17, 2026	51-200	170 contacts →
	Exact match “EH & E delivers integrated environmental, engineering, and health and safety solutions that help businesses and institutions safeguard their assets, improve operations and boost…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
10	Smithers	Exact match	Wareham, MA, United StatesHQ recorded Sep 17, 2026	1,001-5,000	155 contacts →
	Exact match “Smithers is a leading provider of environmental risk testing to the Agrochemical, Pharmaceutical, and Chemical industries.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11	Cleanair Engineering	Exact match	Palatine, IL, United StatesHQ recorded Sep 17, 2026	51-200	152 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
12	Energy Laboratories, INC	Exact match	Billings, MT, United StatesHQ recorded Sep 17, 2026	201-500	113 contacts →
	Exact match “Founded in 1952, Energy Laboratories, Inc.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
13	Metiri Group	Exact match	Geneva, IL, United StatesHQ recorded Sep 17, 2026	201-500	112 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
14	American Industrial Hygiene Association Aiha	Exact match	Falls Church, VA, United StatesHQ recorded Sep 17, 2026	11-50	108 contacts →
	Exact match “Founded in 1939, AIHA is a nonprofit organization serving professionals dedicated to the anticipation, recognition, evaluation, control, and confirmation of environmental…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
15	A-Tech Consulting, INC	Exact match	Orange, CA, United StatesHQ recorded Sep 17, 2026	51-200	97 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
16	SKC INC	Exact match	Eighty Four, PA, United StatesHQ recorded Sep 17, 2026	51-200	95 contacts →
	Exact match “SKC is a well-known and respected leader in industrial hygiene and occupational safety.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
17	Aerostar SES LLC	Exact match	Jacksonville, FL, United StatesHQ recorded Sep 17, 2026	51-200	94 contacts →
	Exact match “Aerostar SES LLC (ASL) is committed to delivering innovative solutions for our clients’ environmental, engineering, and remediation needs.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
18	Yorke Engineering, LLC	Exact match	San Juan Capistrano, CA, United StatesHQ recorded Sep 17, 2026	51-200	92 contacts →
	Exact match “Yorke Engineering, LLC (Yorke) was founded in 1996 and specializes in air quality, waste, storm water and industrial hygiene/safety services.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
19	Envirocheck, INC	Exact match	Orange, CA, United StatesHQ recorded Sep 17, 2026	51-200	91 contacts →
	Exact match “Founded in 1998, ENVIROCHECK, INC.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
20	ALC Environmental	Exact match	New York, NY, United StatesHQ recorded Sep 17, 2026	51-200	82 contacts →
	Exact match “ALC provides a wide range of environmental services from testing and reporting on potentially unsafe or hazardous conditions (asbestos, lead paint, indoor air quality/mold, soil…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
21	Mabbett & Associates, INC	Exact match	Stoneham, MA, United StatesHQ recorded Sep 17, 2026	51-200	79 contacts →
	Exact match “Established in 1980, Mabbett & Associates, Inc.(Mabbett) is a recognized leader in delivering comprehensive environmental, health, and safety consulting and engineering services.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
22	ISI Environmental	Exact match	Wichita, KS, United StatesHQ recorded Sep 17, 2026	51-200	79 contacts →
	Exact match “iSi provides environmental, health and safety facility support services to a wide variety of industries across the U.S.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
23	Phoenix Environmental Laboratories, INC	Exact match	Manchester, CT, United StatesHQ recorded Sep 17, 2026	51-200	78 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
24	Occupational Services, INC	Exact match	San Diego, CA, United StatesHQ recorded Sep 17, 2026	11-50	74 contacts →
	Exact match “Occupational Services, Incorporated is a San Diego-based professional consulting firm providing services in the areas of environmental compliance, occupational health and safety…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
25	Wise Safety & Environmental	Exact match	St. Louis, MO, United StatesHQ recorded Sep 17, 2026	51-200	74 contacts →
	Exact match “Wise Safety & Environmental consists of Wise El Santo Co.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “industrial hygiene testing companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 1,072 industrial hygiene testing companies based in the United States

See the full list, filter by size, metro and specialty, and access 5,469 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Industrial hygiene testing companies based in the United States at a glance

As of Sep 17, 2026

34.5%Verified-email coverage

14.8Average contacts per company

1-10Median size (employees)

2.0%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

554

11-50

387

51-200

104

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 1,072 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with the United States whose business descriptions match “industrial hygiene testing companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 5,469 professional contacts with verified work emails across the full matched dataset. 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.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “industrial hygiene testing companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many industrial hygiene testing companies are there based in the United States?

RevenueBase identified 1,072 company matches for industrial hygiene testing companies associated with the United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Pace Analytical Services tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most industrial hygiene testing companies?

Houston leads with 21 company records, followed by New York (21) and Las Vegas (13).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 5,469 professional contacts with verified work emails tracked across these 1,072 companies; direct dials are available where recorded.

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 SmartSearch, 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.