Problems From FOG Clogged drains or toilets in your home. Raw sewage overflowing into your home or the house next door, resulting in unnecessary and expensive clean up costs. Overflows of raw sewage into your local streets, parks, yards and streams. Potential contact with disease-causing organisms. Higher operating and maintenance costs, potentially resulting in higher sewer bills to you. Click Here to view "How a Sewer Blockage Affects the Sewer System" Common Sources of FOG Cooking Oil Meat Trimmings (fried, baked meats) Bacon Drippings Shortening or Lard Salad Dressing Mayonnaise Melted Butter Dairy Products Sauces