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OMRI Product Lists

Browse, download, and order the latest OMRI Products Lists. VIEW LISTS

Welcome to the Organic Materials Review Institute

OMRI’s mission is to cultivate organic integrity through knowledge and trust

  • We achieve this by:
  • Supporting certifiers with reliable expertise and a comprehensive knowledge hub for input material compliance.
  • Providing input manufacturers with thorough, transparent product reviews, and maintaining a publicly accessible and up-to-date list of allowed products.
  • Offering farmers and processors a dependable resource for approved inputs, expediting their path to market.
  • Assuring consumers with a recognizable seal that signifies compliance with organic standards.
  • Collaborating with regulatory bodies to share insights and exchange expertise that informs policy.

OMRI at a glance

OMRI is a 501(c)(3) nonprofit organization that provides an independent review of products — such as fertilizers, pest controls, livestock health care products — intended for use in certified organic production and processing. When companies apply, OMRI reviews their products against the organic standards. Acceptable products are OMRI Listed and appear on the OMRI Products Lists. OMRI also provides technical support and training for professionals in the organic industry.

carrotcarrotArticles and Announcements

April 1, 2026

In December 2024, the USDA National Organic Program (NOP) published the Market Development for Mushrooms and Pet Food final rule, clarifying the standards for the production of organic mushrooms and organic pet food products. OMRI was prepared to amend our Standards Manual and Generic Materials List in response to these regulatory changes, but paused our efforts when the USDA proposed rescinding the final rule in May 2025.

Eugene, OR—January 22, 2026—OMRI has revised the OMRI Generic Materials List© (GML) and OMRI Canada Permitted Substances Categories© for review to the NOP and COR regulations. 

All revisions are effective January 22, 2026.

Summary of changes:

Eugene, OR—January 26, 2026—The Organic Materials Review Institute (OMRI) has launched its newly redesigned website, OMRI.org, providing users with an improved and more intuitive experience for accessing information about materials used in organic production and processing.