2022 NAICS national industry in sector 54 Professional, Scientific, and Technical Services
541620 Environmental Consulting Services
NAICS 541620 is the US industry code for environmental consulting services. It covers 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.
- Code
- 541620 (2022 NAICS)
- Title
- Environmental Consulting Services
- Part of
- Management, Scientific, and Technical Consulting Services
- SBA small business limit
- Average annual receipts up to $19 million
- Closest UK SIC
- 74901, 74902, 74909 (details)
Changes coming. The NAICS 2027 revision applies to data from 1 January 2027, and SBA proposed new size standards on 20 August 2026. The values on this page are the ones in force today; we update this page when the official files change.
Official definition
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.
When to use a different code
Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:
- Establishments primarily engaged in environmental remediation are classified in Industry 562910, Remediation Services.
- Establishments primarily engaged in providing environmental engineering services are classified in Industry 541330, Engineering Services.
- Establishments primarily engaged in providing environmental testing services are classified in Industry 541380, Testing Laboratories and Services.
- Establishments primarily engaged in promoting the preservation and protection of the environment are classified in U.S. Industry 813312, Environment, Conservation and Wildlife Organizations.
- Establishments primarily engaged in individual activities as part of an ecological restoration project are classified according to the primary activity.
- Government establishments primarily engaged in administering, overseeing, and managing governmental ecological restoration programs are classified in Industry 924110, Administration of Air and Water Resource and Solid Waste Management Programs.
Activities listed under 541620
The Census index assigns these 6 activities to this code. If your business matches one, this is your code.
- Ecological restoration consulting services
- Environmental consulting services
- Environmental reclamation planning services
- Sanitation consulting services
- Site remediation consulting services
- Wetland restoration planning services
SBA size standard for 541620
To count as a small business for SBA loans and federal contracts under NAICS 541620, your business (including affiliates) must not exceed $19 million in average annual receipts. Check your business.
Source: SBA table of size standards, effective March 17, 2023.
Closest UK SIC 2007 codes
There is no official one-to-one link between NAICS and UK SIC. These codes share the same international class (ISIC Rev. 4: 7490), so treat them as a starting point and check the definition.
- 74901Environmental consulting activitiesUK SIC
- 74902Quantity surveying activitiesUK SIC
- 74909Other professional, scientific and technical activities n.e.c.UK SIC
Built from Census concordances 2022→2017 NAICS and 2017 NAICS→ISIC Rev. 4.
Similar codes to compare
Data last changed November 14, 2026. How this page is built.