2022 NAICS national industry in sector 31-33 Manufacturing
325311 Nitrogenous Fertilizer Manufacturing
NAICS 325311 is the US industry code for nitrogenous fertilizer manufacturing. This U.S.
- Code
- 325311 (2022 NAICS)
- Title
- Nitrogenous Fertilizer Manufacturing
- Part of
- Fertilizer and Compost Manufacturing
- SBA small business limit
- Up to 1,050 employees
- Closest UK SIC
- 20120 (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 one or more of the following: (1) manufacturing nitrogenous fertilizer materials; (2) manufacturing fertilizers from sewage or animal waste; and (3) manufacturing nitrogenous materials and mixing with other ingredients into fertilizers.
When to use a different code
Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:
- Establishments primarily engaged in mixing ingredients made elsewhere into nitrogenous fertilizers are classified in U.S. Industry 325314, Fertilizer (Mixing Only) Manufacturing.
Activities listed under 325311
The Census index assigns these 12 activities to this code. If your business matches one, this is your code.
- Ammonia, anhydrous and aqueous, manufacturing
- Ammonium nitrate manufacturing
- Ammonium sulfate manufacturing
- Anhydrous ammonia manufacturing
- Fertilizers, mixed, made in plants producing nitrogenous fertilizer materials
- Fertilizers, natural organic (except compost), manufacturing
- Fertilizers, of animal waste origin, manufacturing
- Fertilizers, of sewage origin, manufacturing
- Nitric acid manufacturing
- Nitrogenous fertilizer materials manufacturing
- Plant foods, mixed, made in plants producing nitrogenous fertilizer materials
- Urea manufacturing
SBA size standard for 325311
To count as a small business for SBA loans and federal contracts under NAICS 325311, your business (including affiliates) must not exceed 1,050 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: 2012), 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.