Rotten Egg Smell From Sink

A rotten egg smell coming from your sink is a common problem that can be caused by a variety of factors. The most common cause is the presence of bacteria in the drain. These bacteria can feed on organic matter in the drain, such as food particles, hair, and soap scum, and produce hydrogen sulfide gas. Hydrogen sulfide gas has a distinctive rotten egg smell.

Other potential causes of a rotten egg smell from the sink include:

A clogged drain. A clogged drain can prevent water from draining properly, which can lead to the buildup of organic matter and bacteria in the drain.
A faulty garbage disposal. A faulty garbage disposal can leak food particles into the drain, which can attract bacteria and produce hydrogen sulfide gas.
A broken or cracked sewer line. A broken or cracked sewer line can allow sewer gases to escape into your home, which can cause a rotten egg smell.

If you notice a rotten egg smell coming from your sink, there are several things you can do to try to fix the problem:

Clean the drain. Pour a cup of baking soda down the drain, followed by a cup of vinegar. Let the mixture sit for 15 minutes, then flush the drain with hot water.
Unclog the drain. If the drain is clogged, you can try to unclog it using a drain snake or a chemical drain cleaner.
Check the garbage disposal. If the garbage disposal is faulty, you may need to have it repaired or replaced.
Call a plumber. If you are unable to fix the problem yourself, you may need to call a plumber to inspect the sewer line.

In most cases, a rotten egg smell from the sink is a minor problem that can be easily fixed. However, if the smell is persistent or accompanied by other symptoms, such as sewage backup or water damage, it is important to call a plumber to rule out more serious problems.