Pink Mold: What It Is & How to Get Rid of It
That pink or orange slime in your shower usually isn't mold at all — it's a bacteria called Serratia marcescens. Here's what it really is, whether it's harmful, and how to get rid of it for good.
Concerned about mold? Call (415) 529-5637Pink Mold Isn't Actually Mold
Here's the surprise: the pink or pinkish-orange film you see in showers, on tile grout, and around drains is usually not mold at all. It's most often Serratia marcescens, an airborne bacteria that thrives on the moisture, warmth, and soap and shampoo residue in your bathroom.
Occasionally the pink color comes from Aureobasidium or Fusarium — which are true molds — but the slimy pink film in bathrooms is overwhelmingly the Serratia bacteria. Either way, the cause and the fix are similar.
What Causes Pink Mold
- Bathroom humidity — the warm, damp environment is ideal
- Soap and shampoo residue — the bacteria feed on the fatty deposits
- Standing water in showers, on tile, around drains, in toilet bowls
- Poor ventilation that lets moisture linger
- Infrequent cleaning — it establishes quickly on surfaces left damp
Is Pink Mold Dangerous?
For most healthy people, Serratia marcescens is low-risk through normal contact — but it is not harmless. It's an opportunistic pathogen that can cause urinary tract infections, respiratory infections, and wound infections, particularly in people with weakened immune systems. It can also cause eye infections in contact lens wearers.
Bottom line: you don't need to panic over pink film in the shower, but you should remove it promptly and keep it from coming back — especially in households with immunocompromised members, young children, or contact lens users.
How to Remove Pink Mold
- Ventilate and wear gloves
- Scrub affected surfaces with a baking soda paste or a bathroom cleaner
- Disinfect with a diluted bleach solution (about 1 tablespoon per cup of water) or hydrogen peroxide, left on for 10 minutes
- Rinse and dry thoroughly
- Clean the showerhead and drains — the bacteria colonize these
Prevention is the real solution: run the exhaust fan during and after showers, squeegee shower walls, fix leaks, and clean weekly. Pink film returns fast in a damp bathroom.
When Pink Mold Signals a Bigger Problem
Pink film in the shower is usually a cleaning issue. But if you're seeing recurring pink or other mold growth despite regular cleaning, or it's appearing outside the bathroom, that points to an underlying moisture problem — a hidden leak, inadequate ventilation, or elevated indoor humidity. That's worth a professional moisture assessment, because surface cleaning won't fix a structural moisture source.