Hi Mary, we're happy to confirm that this Climate Blend Flour is considered one of our Signature Flours, and therefore meets the allergen standards of that category as before. Apart from wheat, no U.S. top 9 allergens are added to our Signature Flours. Our Signature Flours packaged in paper bags are produced in a facility where wheat is the only top 9 allergen in production. This product does not contain mustard plant, but we do not test for mustard in the final milled product. 

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