Harris Diatomaceous Earth Food Grade 4 lb powder is listed with the Organic Materials Review Institute and is composed of ground freshwater diatomaceous earth. 

• Natural Product - Composed of 4lbs of 100% ground freshwater diatomaceous earth with absolutely no additives or fillers. 
• OMRI Listed - Listed with the Organic Materials Review Institute, a non-profit organization that reviews products against organic standards.
• Hundreds of Uses - Mother nature's best kept secret with hundreds of uses. We encourage you to explore the many benefits of food grade diatomaceous earth!
• Made in the USA – Mined in Nevada and packaged in Georgia

Harris Food Grade Diatomaceous Earth (DE) is composed of 100% ground freshwater DE, with no additives. The product is made of the naturally occurring fossilized remains of diatoms, a type of algae that forms in freshwater. These remains are ground up into a soft, fine white powder that carry many different uses. It's chemical free and completely safe to use around children and pets.