The answer to 'why is my sewer line foul smell' is that there are several common causes, including a blocked or clogged sewer line, a broken or cracked sewer pipe, or a problem with the septic system. A foul sewer smell is typically a sign of a more serious plumbing issue that needs to be addressed.
Some common symptoms of a sewer line problem include gurgling sounds in the plumbing, slow draining sinks or tubs, and sewage backing up into the home. If you're experiencing a persistent sewer smell, it's important to address the issue promptly to prevent further damage and health hazards.