You may have a sewer line issue if you notice recurring clogs or backups in your drains, foul odors emanating from drains, patches of overly lush or green grass in your yard, unexplained puddles or wet areas on your property, or if you hear gurgling sounds coming from your toilets and drains. These symptoms can indicate blockages, leaks, or breaks in your sewer line, requiring professional inspection and possibly repair or replacement to prevent further damage and maintain proper sanitation in your home.