How to Get Rid of Black Mold in Toilet? – 4 Methods

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Paulk Webb


Freddie J. Hagopian

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how to get rid of black mold in toilet

Black mold in your toilet can be an unsightly and potentially hazardous problem. Not only does it make your bathroom appear unclean, but it can also pose health risks to you and your family.

However, fear not! In this comprehensive guide, we will provide you with a detailed step-by-step solution on how to get rid of black mold in toilet, which helps ensure a clean and healthy environment. Get ready to bid farewell to black mold and welcome a fresh, pristine bathroom once and for all!

Ways to Get Rid of Black Mold in the Toilet

Mold in toilet tank and bowl often appears as green or black stuff. Even when you do not see it, this type of fungal growth smells distinctively musty and can cause nausea and nasal irritation.

If your toilet resembles the pictures of mold below, it’s time to get cleaning.

There are several methods that you can apply to get mold out of toilet. You may try using vinegar and baking soda as cheap, easy home remedies, or you can use bleach and other chemical products to ensure effectiveness. You can prepare the following tools:


  • Protective gloves for cleaning
  • A mask for personal protection
  • A toilet bowl scrubber
  • One of the cleaners specified below
  • Spray bottle

To ensure a safe and effective mold removal process, there are several preliminary steps that should be followed.

  1. Firstly, before you remove mold from the toilet, It is crucial to prioritize proper ventilation by either opening a window or using a fan. This will improve airflow and help dissipate any mold spores in the area.
  2.  Additionally, it is important to shut off the water supply to the toilet before starting the cleaning process. This precautionary measure prevents the spread of mold spores while you work.

Once the initial steps have been completed, the next phase involves the actual cleaning of the mold-infested area with a toilet mold remover.

There are several effective, natural methods that can be employed for this purpose, and it is important to follow each carefully to ensure thorough cleaning. In this article, we will provide you with four common methods to get rid of black mold.

Method 1: Vinegar Method


Vinegar is naturally a cleaning agent with antimicrobial properties. Its acidic nature helps break down and eliminate mildew, inhibiting its growth and reducing its appearance.

  1. To use vinegar effectively, start by pouring it into both the bowl and tank and you can mix it with water as well.
  2. You can also add baking soda, which will help eliminate odor and combine with vinegar to form an acid for cleaning. Ensure the powder reaches the toilet bowl rim as well.
  3. Let the solution sit for about an hour before scrubbing. Make sure you use a brush to clean the bowl and a cloth to wipe the seat and rim.
  4. Repeat the scrubbing as necessary until there’s no mold on toilet seat and other surfaces.
  5. Now you may wrap up the process and use your toilet as normal!

If you want to make sure the mold won’t appear again, repeat this process a few times a week!

Replacing baking soda and vinegar with a baking soda paste or soap and water will also work. Make adjustments depending on what you have available.

How to Remove Toilet Mold that Keeps Coming Back | LITTLE KNOWN HACK

Method 2: Bleach


To clean toilet tank mold, bleach is also a cheap product that’s easy to acquire.

  1. If you want to use bleach to kick mold to the curb, mix 1 part bleach with 10 parts water and use it to scrub the toilet bowl.
  2. Make sure you get every nook and cranny, focusing on those tricky black spots that are hard to reach.

If needed, repeat this process once a week for a while to ensure that mold stays far away. You’re on your way to a mold-free toilet!

Method 3: Borax


Another natural, cost-saving solution for fighting mold is to use Borax. This does not release harmful chemicals, so you don’t have to worry about its toxicity, unless you try to swallow it intentionally (we believe you won’t).

  1. First, pour ¼ cup of borax into the toilet.
  2. Next, scrub away the mold from the surface with a toilet brush.
  3. As the mold loosens, flush the commode to get rid of it completely.

Method 4: Hydrogen peroxide


Hydrogen peroxide has powerful antifungal properties that makes it effective at killing mold.

All you have to do is pour a cup of 3% undiluted H2O2 into the toilet, let it sit for 15 minutes, then proceed to scrub the porcelain surface until it’s spotless.

You can also use this method for cleaning bathroom walls and other parts of the toilet like the rim.


If you notice any signs of mold growth behind bathroom tiles, like tiles looking crooked or shifting when touched, or when the mold in toilet bowl keeps coming back, it’s crucial to reach out to professionals for help.

Frequently Asked Questions


What causes black mold in toilet bowl?

You probably wondered “why does my toilet get moldy?” Toilet mold, particularly black mold, can develop for various reasons.

  • Mold and mildew thrive in dark and humid environments, making the bowl and tank of toilets susceptible to them. Factors such as high humidity levels, insufficient ventilation in the bathroom, and infrequent use of the toilet can contribute to mold development.
  • Moisture buildup resulting from leaks, cracks, or worn-out washers in the toilet or plumbing can also create an ideal breeding ground for mold. Organic surfaces, like hard water deposits and the walls of the tank, provide nutrients for mold growth.
  • Interestingly, diabetes mold can happen due to the substances we flush down the toilet. If your body is unable to process glucose, all that sugar will go down the drain and create mold in toilet diabetes.

Is black mold in the toilet tanks dangerous?

Preventing mold growth in your toilet tank and bowl is crucial for maintaining a healthy environment. As it is a kind of toilet fungus, mold can pose various health risks, and it is best not to let it continue spreading in your home.

Common health issues associated with mold include rashes, headaches, shortness of breath, dizziness, nausea, allergic reactions like hay fever, asthma attacks, and even serious lung infections like pneumonia.

Mold is commonly found in bathroom areas such as tile grout, around drains, and on walls or wallpaper. Those black spots often get moldy so fast, and if inhaled or come into contact with skin, they can lead to a range of health problems.

Are a ring and a mold the same thing?

A mold ring that appears in your toilet is typically removable. If you’ve tried scrubbing the inside of your toilet but can’t seem to get the ring clean, chances are it’s a hard water stain rather than mold.


Congratulations! You have now armed yourself with the necessary knowledge and techniques to effectively eliminate black mold in your commode. By following the step-by-step guide on how to get rid of black mold in toilet, you can enjoy a clean and healthy bathroom environment.

Remember, consistency is key. Regular cleaning, proper ventilation, and preventive measures will help keep black mold at bay in the long run. If your toilet keeps getting moldy, it is best to call a professional plumber to help!

We wish you luck with your process of getting rid of annoying black mold and keeping your toilet clean!

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