Sewer odor comes from the breakdown of human waste and includes harmful gases like hydrogen sulfide and ammonia. Small doses of these gases won't harm you, but chronic exposure can be toxic.,
Why does my house suddenly smell of sewage?
There are several potential reasons your bathroom smells like a sewer. Some of the most common include an improperly installed or cut vent pipe, a broken or loose seal or a damaged toilet.May 28, 2019
Can sewer gas come through walls?
Loose connections along the vent pipe or sewer line can also let pungent gases into your home. These will most typically be inside a wall or in the ceiling, so you'll need the help of an experienced plumber to correct this issue.Jan 13, 2022