What Is Pink Mold?

pink mold

Two fast facts to know about pink mold:

1. It’s often not pink.
2. It’s not really mold.

What is generally known as “pink mold” is a slimy, oozy biofilm that appears in enclosed areas where condensation and high humidity are common. In most homes, that’s the bathroom. Pink mold—its formal designation is Serratia marcescens—is actually a form of bacteria, not a fungus. Therefore, it’s not officially classified as a mold.

Serratia marcescens can range from pink to dark purple to shades of bright orange. As an airborne bacterial species, pink mold feeds on moisture and soapy scum often present on hard surfaces like shower stalls and bathtubs. It may also infect shower curtains and toilet bowls or grow on hard wooden bathroom surfaces like windowsills or moulding.The appearance of this slimy film does not enhance household aesthetics. 

DIY Treatment

Pink mold is resistant to standard household cleaning methods and typically requires special attention to eliminate it. Local occurrence of pink mold totaling less than three square feet can usually be treated by the homeowner with these steps:

  • Mix up a thick solution of water, a cup of baking soda, and a few teaspoons of liquid soap.
  • Use this solution with a soft brush to scrub pink mold contamination and loosen it from the surface.
  • Rinse away the residue with water.
  • After visible growth is removed, the surface must be sterilized to kill residual bacteria. Make a 50/50 mix of warm water and household bleach in a spray bottle and spray all affected surfaces. Allow the mixture to remain for 10 minutes, then scrub lightly with a brush.
  • Wash away the residue with water and dry with a clean towel.

Is Professional Remediation Required?

Where Serratia marcescens bacterial contamination exceeds three square feet, contact a qualified mold remediation specialist about professional treatment to remove this more advanced and extensive growth. 

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