As we spend more time entertaining around the holidays, it may be tempting to pour fats, oils and grease or FOG down the drain. Resist that temptation to avoid a sewer clog. FOG can cause a clog. When FOG enters your plumbing and congeals together, your plumbing becomes plugged up - kind of like clogged arteries in your body. It can also make its way into the wastewater collection system and cause blockages in Padre Dam's infrastructure. Common drain-blocking foods may include cooking oil, gravy, salad dressing and meat trimmings. The best way to dispose of FOG is in the trash.