When poured down the drain, FOG can build up in pipes and equipment and cause significant problems in the sewer system and wastewater treatment plants. Problems such as sewer line blockages that cause sewer overflows are the result of improper disposal of FOG. Sewer overflows cause environmental health hazards and property damage and lead to increased operation and maintenance costs which show up as higher sewer bills for you the customer. FOG that reaches the wastewater treatment plant affects the Biological Nutrient Removal process, increases Biological Oxygen Demand, and increases maintenance for removal.