NAICS Code 325315 — Compost Manufacturing

National Industry in the official 2022 North American Industry Classification System (U.S. Census Bureau). It is one of 4 national industries under 32531 (Fertilizer and Compost Manufacturing).

Code	325315
Title	Compost Manufacturing
Level	National Industry (6-digit)
Edition	NAICS 2022 edition
SBA size standard	550 employees

Official definition (2022 NAICS)

This U.S. industry comprises establishments primarily engaged in manufacturing compost through the controlled aerobic, biological decomposition and curing of biodegradable materials.

Is a business under 325315 "small"?

Under the SBA size standards (13 CFR 121.201, effective March 17, 2023), a business classified in NAICS 325315 qualifies as a small business if it does not exceed 550 employees. Small-business status determines eligibility for federal set-aside contracts, SAM.gov certifications and SBA loan programs — employee count is averaged over the latest 24 months.

Where 325315 sits in the hierarchy

Level	Code	Title
Sector	31-33	Manufacturing
Subsector	325	Chemical Manufacturing
Industry Group	3253	Pesticide, Fertilizer, and Other Agricultural Chemical Manufacturing
NAICS Industry	32531	Fertilizer and Compost Manufacturing
National Industry	325315	Compost Manufacturing

No direct SIC mapping is shown for this code: it was introduced or redefined after the official 1987 SIC ↔ 2002 NAICS concordance. Use the crosswalk tool to explore related legacy codes.

Related National Industry codes

• 325311 — Nitrogenous Fertilizer Manufacturing
• 325312 — Phosphatic Fertilizer Manufacturing
• 325314 — Fertilizer (Mixing Only) Manufacturing

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.