Why does my sink smell like septic?
Why does my sink smell like septic? There could be odor-causing bacteria feeding on debris in your pipes. This process will give off a foul-smelling hydrogen sulfide gas, which smells like sewage or rotten eggs. Also, mold grows where it's warm and wet — and mold growth on the debris causing a drain clog can also cause a bad smell. Why would my bathroom sink smell? Soap scum, dead skin, hair and other stuff accumulates and gets trapped. That layer of rotting gunk in your overflow pipe will eventually emanate a foul odor. Another nasty problem — noxious sewer gasses...