Coming home to find that your sink smells bad is always an unpleasant surprise. This rotten egg smell is often an indicator of deeper plumbing issues. If you are looking for ways to identify, treat, and prevent sewer smells, read on to find our handy tips.
Why Does My Sink Smell Like A Sewer (Hydrogen Sulfide Explained)
In groundwater, wells, and water distribution systems, hydrogen sulfide often occurs when bacteria comes into contact with sulfide compounds. This causes a chemical reaction to occur and creates hydrogen sulfide gas. This gas can enter through your pipes and plumbing system to create unpleasant kitchen sink smells. It is possible to treat your water and distribution system to prevent this from happening in the future.
Sewage or Pollution
Sewer waste can also create this familiar rotten egg smell. However, as it is dealt with separately from your groundwater, it is rare for the two to mix. Sewer waste can get into your groundwater system and cause you to smell the offensive odor in rare instances. If your sewer smell is coming from the sink, it may mean that you have a broken or dried-out p-trap.
Groundwater is a valuable resource for your home that, while useful, can be prone to bacterial growth. Hydrogen Sulfide is typically formed when the chemical matter in the water decays or when the bacteria comes into contact with minerals and rocks containing sulfur. A chemical reaction occurs and produces these noxious fumes, which can push through your plumbing system and into your home. We recommend treating the groundwaters on the advice of a professional plumber.
Water heaters provide warm water to our homes, vital to everyday cleaning and self-care tasks. However, they are not exempt from causing nasty smells. Warm water is an ideal environment for helping bacteria grow. What can happen in water heaters is that the tank's electrons can react with sulfate to become hydrogen sulfide. It is possible to treat this issue and prevent it in the future.
Where Is The Bad Smell Coming From?
If your water is contaminated, it could be coming from your water heater. The magnesium in a rod could be reacting with the bacteria to create the fumes.
Contaminated Sink Drain
Grease, fat, food, hair, and skin oil can all build up over time in your sink drains and create some unpleasant smells as bacteria develop and the food rots.
Clogged or Blocked Pipes and trap
If your pipes and p-trap are clogged, this can cause a build-up of food and water. The longer this blockage sits, the more bacteria can build up in the stagnant water and create unpleasant smells.
Clogged or Cracked Vents
If you have an iron vent pipe, it may be cracked or clogged by rust that decays in the water. Alternatively, it could be blocked by tennis balls, leaves, and other debris. While you can remove clogs with an auger, cracked pipes are more severe and will require a professional.
While kitchens have to deal with food and grease-related clogs, bathrooms have another type to contend with. Caked-on soap can mingle with shampoo, skin oils, and hair to form biological slime that sticks to your pipes and creates unpleasant bathroom sink smells.
How Do You Get Rid Of A Smelly Sink? (Cleaning Tricks)
How To Prevent Your Sink From Smelling
Preventing sink smells from occurring is key to prolonging your system's life. We recommend:
People Also Ask (FAQs)
What are the long-term risks of prolonged Hydrogen Sulfide exposure?
Long term risks include poisoning, asphyxiation, fire, and explosions.
How do you freshen a smelly drain?
By cleaning your system as above, you can help prevent any nasty smells. If you have a garbage disposal, you can use citrus wedges to create a pleasant aroma.
What happens if you breathe in sewer gas?
Depending on your exposure level, you could experience:
If it smells like something died under your sink, you need to deal with it quickly. Try the methods above and, if the smell remains, contact a local plumbing professional for help.
Matt is a freelance writer, English graduate, & keen traveler from the UK. As a specialist plumbing expert, he enjoys writing about everything there has to do with at-home plumbing products & related problems. When he isn’t writing, he’s usually drinking coffee or planning his next adventure. In his spare time, he also runs his own blog all about digital nomad life.