2022 NAICS national industry in sector 22 Utilities

221116 Geothermal Electric Power Generation

NAICS 221116 is the US industry code for geothermal electric power generation. This U.S.

Code
221116 (2022 NAICS)
Title
Geothermal Electric Power Generation
Part of
Electric Power Generation
SBA small business limit
Up to 250 employees
Closest UK SIC
35110, 35120, 35130, 35140 (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 operating geothermal electric power generation facilities. These facilities use heat derived from the Earth to produce electric energy. The electric energy produced in these establishments is provided to electric power transmission systems or to electric power distribution systems.

Source: US Census Bureau, 2022 NAICS descriptions.

Activities listed under 221116

The Census index assigns these 3 activities to this code. If your business matches one, this is your code.

Source: US Census Bureau, 2022 NAICS index file.

SBA size standard for 221116

To count as a small business for SBA loans and federal contracts under NAICS 221116, your business (including affiliates) must not exceed 250 employees. 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: 3510), 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.