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.,
Broken, Clogged or Poorly Installed Vent Pipes The vent pipe is your sewerage system's breather. When it gets clogged, the sewer gases can back up into the sinks and the toilet, resulting in your bathroom's sewage smells.Mar 8, 2021
Pour baking soda and vinegar down the drain: Run hot tap water for several seconds, and then turn the water off. Dump one cup of baking soda down the drain followed by two cups of hot vinegar. Let the concoction fizz. After one hour, flush the drain with hot tap water.Sep 13, 2018
A clog in the drain line will create a buildup of organic matter like hair and soap. Bacteria will form on the clog, creating a nasty odor that resembles the smell of sewage. If left untreated, a clog will build on itself, growing larger and larger and producing more noticeable odors.May 28, 2019
Baking soda and vinegarnnStart by pouring ¼ cup of baking soda down the drain, and then leave it for about 10 minutes. Then, follow it with one cup of vinegar. Let the mixture fizzle and work for a few minutes, and then finish by turning on the water and running the disposal to clear out any leftover food waste.