The answer to 'water line foul smell' is that a foul odor coming from your water lines is often caused by bacterial growth or decomposing organic matter. Common symptoms include a rotten egg or sewage-like smell from your taps, fixtures, or drains. This can be a sign of a more serious issue that requires professional attention.
Some potential causes include a broken sewer line, a faulty septic system, or stagnant water in the plumbing system. Bacteria can thrive in these conditions, producing hydrogen sulfide gas that creates the unpleasant odor. It's important to address the root cause to prevent further damage and health risks.