Can Bathroom Mold Be Brown?

Updated November 21, 2016

Bathroom mould can come in a variety of colours, such as brown, pink, green or black. Mold is dangerous even in small amounts because it releases mould spores into the air, which can cause adverse health effects. People who are allergic to mould or those who have respiratory diseases such as chronic obstructive pulmonary disease or COPD or asthma are at an increased risk of mould-related symptoms.


Mold is caused by fungi that reproduces by mould spores. These spores float through the air and begin to grow when they land on moist, humid areas inside the home. Mold can be a variety of colours and usually grows in moist or humid areas of the home, such as the bathroom, laundry room and kitchen. Mold can also begin growing on carpet or underneath wallpaper where a leak has occurred. When mould begins to grow, it has an earthy smell or it may have a foul odour. If you can see mould growth, it may look like black, brown or green spots spattered like paint over a surface.


Brown mould growth in your bathroom can cause adverse health effects, such as wheezing, coughing, nasal congestion, skin rash, itchy eyes and sneezing. Those with serious respiratory conditions may find themselves with increased severity in asthma attacks. People with immune-mediated diseases often develop serious fungal infections as a result of brown mould exposure. The Center for Disease Control advises homeowners to remove any type of mould growth inside their homes promptly to avoid serious health problems.


Brown mould spots can be removed from bathroom tile, counters and flooring with chlorine bleach and water. Combine 1 cup of chlorine bleach with 1 gallon of warm water. Put on gloves, a mask, goggles and long sleeves before removing mould. Open a window for ventilation before removing mould with bleach, and never mix any other cleaners or chemicals such as ammonia with chlorine bleach. Mixing ammonia and chlorine bleach can cause a build-up of toxic fumes that can make you sick. Scrub the area of mould with a scrub brush until it is gone. Rinse with water, and dry with a soft cloth. You can also remove mould with fungicides sold at your local grocery store. If you have a very large area of mould, you should contact a mould removal specialist for advice before attempting to remove it yourself.


Once you have removed brown mould from your bathroom, you must find the source of moisture and repair it to avoid the return of mould. The pipes underneath the bathroom sink are prone to leaks, which can cause mould growth. Bathrooms are humid places, installing a ventilation fan can help reduce the indoor humidity level, making mould growth less likely. Opening a bathroom window when showering can reduce indoor humidity levels as well.

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About the Author

Tracy Hodge has been a professional writer since 2007. She currently writes content for various websites, specializing in health and fitness. Hodge also does ghostwriting projects for books, as well as poetry pieces. She has studied nutrition extensively, especially bodybuilding diets and nutritional supplements.