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For operations that are certified organic, you'll save some time by having current copies of the OMRI Listing Certificates at time of inspection. You can always get copies from and see the current list of allowed substances on their website.
New certificates are issued some time toward the end of every calendar year.

EM•1® Microbial Inoculant, Ag1000® Organic, and EM•1® Waste Treatment are OMRI Listed without restrictions. "Allowed A". The OMRI Listing complies with the USDA National Organic Program for Certified Organic Producers.

Ag1000® Organic OMRI Certificate
Ag1000 Organic OMRI 2016

EM•1® Waste Treatment OMRI Certificate
EM1 Waste Treatment OMRI 2016

EM•1® Microbial Inoculant OMRI CertificateEM1 Microbial Inoculant OMRI 2016