About OMRI Listings

January 18, 2022
Adams Fairacre Farms

The Organic Materials Review Institute (OMRI) was founded in 1997 to evaluate materials for use in organic agriculture. At that time, there were more than 40 certifiers who were performing organic certification using various state and private standards.

OMRI is a nonprofit organization providing organic certifiers, growers, manufacturers and suppliers an independent review of products intended for use in certified organic production, handling, and processing. OMRI reviews input products to determine compliance with the USDA National Organic standards, the Canada Organic Regime (COR) standards and/or Mexican Organic Products Law (LPO).

Inputs include products such as fertilizers and pest control products for crop production, livestock feed ingredients and health care products, processing aids and sanitizers, and other materials intended for use in organic production. Compliant products are OMRI Listed® and may display the OMRI seal.

OMRI verifies input products intended for use in organic production. By focusing exclusively on inputs, OMRI provides essential expertise to support the organic certification process. On average 10-15% of the applications that OMRI receives do not make it through the process, either because the application is withdrawn by the applicant, or the product is determined to be prohibited.

OMRI also provides subscribers and certifiers guidance and training on the acceptability of material inputs in general under organic standards.

Information courtesy of