What are OMRI review standards for compost products?
All compost must meet the same pathogen and heavy metal requirements. Composts which have levels above the pathogen threshold will be listed as Allowed with Restrictions in the Category: Manure-raw. Composts which do not meet the heavy metal requirements may receive a caution statement or may not be eligible for OMRI Listing [For information about maximum allowable levels of pathogens or heavy metals see Review Standards for Lab Analyses or contact OMRI]. Depending on the compost type, specific requirements may apply. See compost requirements by category on pages 80-81 of the Generic Materials section of the OMRI Policy and Standards Manual and in the table below. A completed Sample Compost Application is available for your reference. Click on the link and scroll down to Download Application Support Materials. Choose Sample Compost Application PDF.
