2022 NAICS national industry in sector 56 Administrative and Support and Waste Management and Remediation Services
562991 Septic Tank and Related Services
NAICS 562991 is the US industry code for septic tank and related services. This U.S.
- Code
- 562991 (2022 NAICS)
- Title
- Septic Tank and Related Services
- Part of
- All Other Waste Management Services
- SBA small business limit
- Average annual receipts up to $9 million
- Closest UK SIC
- 37000 (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 U.S. industry comprises establishments primarily engaged in (1) pumping (i.e., cleaning) septic tanks and cesspools and/or (2) renting and/or servicing portable toilets.
When to use a different code
Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:
Activities listed under 562991
The Census index assigns these 9 activities to this code. If your business matches one, this is your code.
- Cesspool cleaning services
- Portable toilet pumping (i.e., cleaning) services
- Portable toilet renting and/or servicing
- Pumping (i.e., cleaning) cesspools and septic tanks
- Pumping (i.e., cleaning) portable toilets
- Septic tank cleaning services
- Septic tank pumping (i.e., cleaning) services
- Tank cleaning services, septic
- Toilet renting and/or servicing, portable
SBA size standard for 562991
To count as a small business for SBA loans and federal contracts under NAICS 562991, your business (including affiliates) must not exceed $9 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: 3700), so treat them as a starting point and check the definition.
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.