Pennsylvania Certification Organization (PCO) is a USDA-accredited organic certifying agency that educates and certifies growers, processors and handlers of organic crops, wild crops, livestock and livestock products in the contiguous United States. Organic certification is not a guarantee of quality or purity of the product. Rather, it is evidence of the operation’s adherence to a prescribed system of agriculture and food production that involves the building and enhancing of the soil naturally, protection of the environment, humane treatment of animals and avoidance of toxic synthetic substances.