NAICS Code 541620 — Environmental Consulting Services

National Industry in the official 2022 North American Industry Classification System (U.S. Census Bureau). It is the only national industry under 54162 (Environmental Consulting Services).

Code	541620
Title	Environmental Consulting Services
Level	National Industry (6-digit)
Edition	NAICS 2022 edition
SBA size standard	$19 million in average annual receipts

Official definition (2022 NAICS)

This industry comprises establishments primarily engaged in providing advice and assistance to businesses and other organizations on environmental issues, such as the control of environmental contamination from pollutants, toxic substances, and hazardous materials. These establishments identify problems (e.g., inspect buildings for hazardous materials), measure and evaluate risks, and recommend solutions. They employ a multidisciplined staff of scientists, engineers, and other technicians with expertise in areas, such as air and water quality, asbestos contamination, remediation, ecological restoration, and environmental law. Establishments providing sanitation or site remediation consulting services are included in this industry.

Cross-References.

Is a business under 541620 "small"?

Under the SBA size standards (13 CFR 121.201, effective March 17, 2023), a business classified in NAICS 541620 qualifies as a small business if it does not exceed $19 million in average annual receipts. Small-business status determines eligibility for federal set-aside contracts, SAM.gov certifications and SBA loan programs — receipts are averaged over the latest 5 fiscal years.

Where 541620 sits in the hierarchy

Level	Code	Title
Sector	54	Professional, Scientific, and Technical Services
Subsector	541	Professional, Scientific, and Technical Services
Industry Group	5416	Management, Scientific, and Technical Consulting Services
NAICS Industry	54162	Environmental Consulting Services
National Industry	541620	Environmental Consulting Services

Related SIC codes

Via the official U.S. Census concordance (1987 SIC ↔ NAICS), shown only where the industry definition is unchanged in NAICS 2022.

SIC code	Title
8999	Services, Not Elsewhere Classified

Data: official 2022 NAICS structure, descriptions and Census concordances, U.S. Census Bureau — U.S. government works in the public domain (17 U.S.C. §105). Suggested reference, not an official determination.