A sewage smell in the house is most often caused by a dry P-trap, a blocked or damaged plumbing vent, cracked or loose drain pipes, a failing toilet seal, a main sewer line backup, or bacterial buildup inside drains. These issues allow sewer gas to escape into living spaces. If the odor is strong, sudden, present in multiple rooms, or accompanied by symptoms like headaches or nausea, ventilate if possible and contact a licensed plumber immediately. Bulldog Rooter provides 24/7 sewer and drain service across Spokane, Spokane Valley, Liberty Lake, Post Falls, and Coeur d’Alene.
