When a sink or water supply starts to smell like rotten eggs, it’s crucial to determine the source of the problem, especially if it’s related to your septic system. Below are three possible reasons why your sink or water has a foul odor and what you can do to prevent these issues from arising. If you suspect a septic system problem , we recommend scheduling an inspection immediately. Bacteria Bacterial activity in the sink pipes can be the cause of the stench. Sinks have high moistur...