The breathing of sewer gas can be a sickening experience, literally and figuratively. The human waste products found in sewer gas can include unhealthy doses of both bacteria and harmful chemicals such as ammonia. The smell of sewer gas alone is unlikely to cause illness beyond an upset stomach. However, breathing the vapors of sewer gas can introduce bacteria and harmful chemicals to the
. body. If your residence has a pipe leak, it is strongly advised that you get it repaired immediately, and avoid the area in the meantime.