The answer to 'why is my sewer line overflowing' is that a sewer line can become clogged or blocked, causing sewage to back up and overflow. This is a common plumbing issue that can be caused by a variety of factors, including tree roots, accumulated debris, grease buildup, or a collapsed pipe.
Symptoms of a sewer line overflow include slow draining sinks, gurgling sounds coming from plumbing fixtures, and sewage backflow into your home. If left unaddressed, a sewer line overflow can lead to significant water damage, unsanitary conditions, and potential health hazards.