OMRI Generic Materials List

The OMRI Generic Materials List© is a catalog of over 900 substances that are Allowed, Allowed with Restrictions, or Prohibited for use in organic agriculture and food processing.

Based on the National Organic Program, this publication serves as a reference guide for organic farmers, handlers, processors, inspectors, certifiers, agricultural professionals, and all others with an interest in materials for use in organic production. You are welcome to view a few sample pages here: Download Sample Generic Materials List

2013 OMRI Generic Materials List

The new 2013 Generic Materials List is now available! The list now includes the OMRI Standards Manual for NOP Review, and they are both provided as one publications for OMRI subscribers, the public, and as part of the OMRI Application Kit for applicants. Visit to learn more about the OMRI Application Kit.

Purchase the OMRI Generic Materials List