FOG is Fats, Oils and Grease that are used to aid in the preparation of food, or that is produced during the preparation of food. FOG gets into the sewer system through sinks and drains as well as through poorly maintained grease traps and grease interceptors. FOG discharge affects the sewer system performance by clogging sewer pipes which causes Sanitary System Overflows, thereby causing expensive property damage and health hazards.