Septic Failure Identification Question #81 – Odors & Gases #1: Why does my septic system smell like rotten eggs?
Why does my septic system smell like rotten eggs? Short Answer Hydrogen sulfide gas is usually responsible. Detailed Answer Hydrogen sulfide is produced when organic waste decomposes inside a septic system. This gas has a distinctive rotten egg odor and may become noticeable when venting problems, leaks, or system failures occur. Related Questions
