Where does pink mold come from?
Chloe Ramirez
Updated on February 20, 2026
What causes pink Mould?
The two most common bacteria causing pink shower mold are called Serratia marcescens and Aureobasidium pullulans. These bacteria produce a pigment, known as prodigiosin, that ranges in hue from pinks to oranges to reds.Is pink mold harmful?
It's usually not as hazardous to your health as black mold and other fungi, but there are some pink mold dangers, such as urinary tract infections, intestinal problems and in rare cases pneumonia. You'll definitely want to rid your bathroom of the pink mold and take steps to keep it from coming back.How do you prevent pink mold?
Tips to Prevent the Growth of Pink Mold
- Encourage hand-washing, especially after using the bathroom, to prevent the transfer of Serratia marcescens bacteria to other surfaces.
- Keep surfaces dry. ...
- Close and straighten shower curtains so they will dry more quickly. ...
- Clean away soap scum at least weekly.
Where does pink bacteria come from?
The pink colour is due to a pigment secreted by a species of bacteria known as Serratia marcescens, found naturally in soil, air and water. They can cause infections, but that generally happens in hospitals and affects people with compromised immune systems.Pink Mold - How Dangerous & Toxic Is It?
What causes pink mold in bathroom?
The “pink mold” you may find in your shower actually isn't mold, but a very common strain of airborne bacteria that's found throughout the world. The bacteria, Serratia marcescens, cause that pink or even red slime you might find in your shower, toilet bowl, or around other water fixtures.How did I get Serratia marcescens?
The bacteria will grow in any moist location where phosphorous containing materials or fatty substances accumulate. Sources of these substances include soap residues in bathing areas, feces in toilets, and soap and food residues in pet water dishes.Is Serratia marcescens airborne?
Serratia is an airborne bacteria and can not survive in your chlorinated water supply. These airborne bacteria can come from any number of naturally occurring sources and the condition can be aggravated if you remove chlorine using an activated carbon filter.Why is my shower grout turning pink?
A: What you're seeing is often called “pink mold.” It is actually a type of bacteria, Serratia marcescens. Bubbly liquids often dislodge this growth, even when scrubbing does not. Try dribbling club soda along the top edge of the tile, or at least above the area where the grout is pink.How do you get rid of Serratia marcescens in the shower?
Throw shower curtains in the washing machine to sanitize.Running your pink-tinged curtain through the washing machine on a gentle wash cycle with warm water effectively removes Serratia marcescens bacteria and any associated stains.
What happens if I touch pink mold?
Beware of the following pink mold symptoms and illnesses:Allergic reactions like coughing, sneezing, eye irritations and skin rash. Pneumonia and bronchitis due to prolonged lung inflammation. Bladder infections and urinary tract infections (UTI) Respiratory tract infection.
Is pink mold contagious?
Humidifier lung is not contagious and therefore makes it easy to pinpoint the root cause of your symptoms. If this happens to you, it is imperative that you remove all traces of the pink mold from your portable humidifier.What gets rid of pink mold?
Create a cleaning paste with 1/4 cup of baking soda and 1 tablespoon of liquid dish soap. Using a soft bristle brush, apply paste to the bacteria and scrub away the pink film.How long does it take for pink mold to grow?
Under ideal conditions (optimal temperature and level of humidity), it takes 24 to 48 hours for mold to germinate and grow. Typically, the spores begin to colonize in 3 to 12 days and become visible in about 18-21 days.What is the pink stuff that grows in my shower?
The pink colour is from a pigment (prodigiosin) produced by Serratia marcescens under the right growing conditions. Serratia marcescens is commonly referred to as “pink mold” or “pink mildew” but it is bacteria causing those irritating pink stains in the bathtub and on your shower head.Is Serratia marcescens harmful to humans?
In rare cases, Serratia marcescens can be deadly.Along with other bacteria, Serratia marcescens is a source of hospital-acquired infections, which can happen if a patient's immune system is severely compromised or if the bacterium enters the body with a catheter, respirator or other medical device.
How do you get pink mould out of shower silicone?
Rub a paste of white vinegar and baking soda into mouldy areas. Scrub at heavy stains with a stiff-bristled brush or reapply the paste. Rinse with a cold, wet sponge and dry with a microfibre cloth. Spray any mould on bathroom sealant with bleach and water to kill mould spores.How do I get pink mold off my shower curtain?
If you're cleaning by handWith the curtain still attached to the rod, spray any areas of the curtain that have visible mildew spots or pink mold, using a 1:1 solution of bleach and water. Let it sit for 10 to 15 minutes.