What is the foul smell coming from toilet?

Author: Mr. Mckenzie DuBuque  |  Last update: Friday, December 5, 2025

Bacteria is in Your Toilet Even though you have probably scrubbed and scrubbed your toilet, the smell coming from the toilet might still be lingering. One reason for this could be microorganisms seeping into the toilet bowl and staying there. This is common during the summer months when it is hot and humid.

How do I get rid of sewer smell in toilet?

Create a mixture of baking soda and vinegar, and pour it down the drains. Let it sit and start to work before flushing it with hot water, which should do the trick. Another trick you can use is to place coffee grounds or activated charcoal in a bowl in the bathroom to absorb the odors.

Why is there an awful smell coming from my toilet?

Here are some common reasons: Bacteria Build-Up: Bacteria can accumulate in the toilet bowl, especially if it hasn't been cleaned regularly. This can lead to odors. Clogged Drain: A partial clog in the drain can cause waste to sit and decompose, leading to foul smells.

How do I find out where the sewer smell is coming from?

Consider everything that ends up in your drains, especially if you use a lot of products and have a lot of family members using your drains. Other causes of sewer gas odors in your home include a dry P-trap, a loose toilet, or a clogged drain. Another cause of sewer gas could be blocked or clogged vent pipes.

How do you get rid of a smelly toilet fast?

White vinegar and baking soda in equal parts are a cost-efficient and effective means of getting rid of odors in a toilet. Add them to the tank, mix them in and then use the toilet brush to gently scrub the tank. Let it sit for a few hours, scrub the tank again and flush.

Sewer Smell In Bathroom? How to Identify and Fix the Problem

What is the best cleaner for smelly toilets?

Both white vinegar and baking soda will eliminate smelly bacteria and break down any minerals that may have built up from your water supply. You can also introduce this mixture into your toilet bowl. Just let it sit for 10-15 minutes before you flush!

What does sewer gas smell like?

The smell of sewer gas is often described as a noxious, rotten-egg-like odor. Its sulfuric, foul smell will permeate your entire home if left unaddressed, leading to major health issues down the line. Small amounts of sewer gas usually won't cause any immediate danger—but large amounts certainly will.

Why does my bathroom smell like sewer but no leak?

A sewer gas smell in the bathroom can be caused by:

evaporation of water in the P-trap piping. broken seal around the toilet in the wax ring or the caulk. A burst pipe. tree's roots have grown into or have caused damage to your sewer pipes.

How to get rid of sulphur smell in toilet?

White vinegar and baking soda in equal parts is a cost-efficient and effective means of getting rid odors in a toilet. Add them to the tank, mix them in and then use the toilet brush to gently scrub the tank. Let it sit for a few hours, scrub the tank again and flush.

Why does sewer smell come and go?

Key Takeaways. Dry P-traps can cause sewer gases to escape and create foul odours. Blocked vent pipes can prevent proper airflow, leading to sewage smells in your home. Cracked sewer pipes may release gases into your house and cause unpleasant smells.

Should you caulk around a toilet?

Reasons to Caulk Around a Toilet

Moisture Prevention: Without caulk around the toilet base, external water can seep under the toilet, leading to floor and subfloor damage over time. This is especially important in bathrooms with wooden floors, as prolonged exposure to moisture can lead to rot and structural issues.

Why does my house suddenly have a strong sewer smell?

These are the most common causes of sewer line clogs, broken or damaged sewer lines, and foul sewer odors in homes: Clogged drains and blockages. Blockages or backups from the city's sewer system. Tree roots that have intruded into the sewer line.

Can a toilet leak sewer gas but not water?

Over time, these can go bad and no longer seal the toilet to the sewer. When this happens, it is not always obvious because water usually won't leak out, only sewer gas, unless there is a clog in the system and water backs up into the drain below the offending toilet.

Will caulking a toilet stop sewer smell?

In addition, urine and water can get under your toilet and cause further damage. Apply caulking to form a protective coating around your toilet base and combat bad odors.

Why has my toilet started smelling?

If there isn't enough water in the p-trap, your toilet can smell. The “p-trap” is the pipe behind your toilet that dips down and returns up in a “p” shape. It blocks sewage gasses from entering your home, and can only function properly when it is filled with enough water.

Will sewer smell go away on its own?

However, sometimes a smell will not go away, no matter how many times you clean your bathroom. A sewer gas smell from your toilet can indicate a serious plumbing issue. Many potential factors can cause a bathroom to smell like a sewer.

How do I get rid of the lingering smell in my toilet?

Pouring a mixture of baking soda and vinegar or any proprietary Drain Cleaner down the drain followed by hot water, can help eliminate these odours. Make sure to clean hair, soap scum and any other obstacle to drainage from drain covers.

How to deodorize a toilet?

Add around 1.5 cups of vinegar to the water in your toilet's tank and let it sit. After at least 15 minutes, flush the toilet two to three times to drain the tank. Add in another . 5 cups of vinegar; allow it to sit while you finish cleaning.

How do you fix a smelly P-trap?

To eliminate odors coming from a dry p-trap, pour half a gallon of water into the trap to restore the barrier. It will prevent the odors from seeping through the drain. Another helpful method is to add a cup of white vinegar bleach to get rid of larvae and slow down the evaporation.

How to fix sewer smell from toilet?

A simple homemade toilet drain cleaner may take care of the problem. Pour ½ cup lemon juice with ½ cup baking soda into the toilet, baking soda first. The two ingredients will bubble up and work their magic to clean any residue that might be creating the offensive odor in your bathroom.

Why does it smell like something is rotting in my bathroom?

Over time, these substances often accumulate along the P-trap and vertical pipes that run underneath your shower. This accumulation is called biofilm. As it builds up, biofilm begins to release a sewage smell from bacteria and decomposing debris.

How to fix a dry P-trap in a toilet?

Slowly pour about a gallon of water into the drain. This will refill the trap and recreate the seal to block sewer gases. For long-term prevention, consider adding a small amount of mineral oil on top of the water in the P-trap.

How to detect sewer gas leak in home?

Detecting Leaks

The best way to determine the source of the leak is to perform a smoke test. This is done with equipment designed specifically for performing this test and uses inert smoke that is induced into the drain and vent system through a vent or a sewer cleanout.

Who to call for sewer smell in house?

If you cannot identify or eliminate the source of the sewer gas smell on your own, it's best to call a professional plumber or a sewer and gas odor specialist.

Previous article
Will bed bugs ever go away on their own?
Next article
Is wilting reversible?