Frequently Asked Questions About Materials Used in Organic Production
Answers to basic questions about inputs used in organic production.

Material Used in Organic Farming (PDF 31.8k)
Overview of the substances used by organic farmers for fertility, pest control, and animal health with a summary of compliance issues.

USDA NOP List

National List Information
The Organic Foods Production Act of 1990 requires the Secretary of Agriculture to establish a National List of Allowed and Prohibited Substances which identifies synthetic substances that may be used, and the nonsynthetic substances that cannot be used, in organic production and handling operations.

OMRI Lists

OMRI Generic Materials List  (sample lists only at this time--to obtain full generic list requires OMRI subscription)
A user-friendly list of substances allowed, restricted, and prohibited for use in organic production based on the NOP Rule.

OMRI Brand Name Products List

For hardcopy versions of the generic and brand name materials list contact: OMRI, P.O. Box 11558, Eugene OR 97440. (541) 343-7600. info@omri.org

Washington State Department of Agriculture Lists

WSDA Organic Resource Manual (PDF 433k)

WSDA Brand Name Materials List
The WSDA Brand Name Materials List is a list of brand name products that have been evaluated to determine that they comply with organic standards. Products listed on the BNML are for use in organic production.

WSDA Materials Lists and Materials Registration Main Page

NOSB Information (PDF 330k)
Mission, vision, and duties of the NOSB.

National List Materials Review Process
A flowchart that shows how materials are petitioned, reviewed, and added to the National List.

EPA Pesticide Registration (PR) Notice
Labeling of pesticides that comply with the NOP Rule.