Orange mould in the kitchen

Orange films in showers and toilets are very often bacteria rather than mould.

1 of the 1 likely answers here is not mould at all.

The species matters less than you think

  • Public health guidance is to remove all indoor mould regardless of type. The CDC and EPA do not recommend routine species testing for ordinary households, because the response does not change: find the water, stop it, remove the growth.
  • “Toxic black mould” is a marketing phrase, not a category. Stachybotrys is real and does need soaked material to grow, so finding it tells you something useful about your building. But the health effects that are well established — allergy, asthma aggravation, irritation — are not specific to it.
  • Mould without water does not persist. Cleaning growth while leaving the moisture source is why it comes back. The leak, the condensation or the ventilation is the actual problem.

Call a professional for areas larger than about 10 square feet, for anything in HVAC ductwork, after sewage or flood water, or if anyone in the household is immunocompromised or has a lung condition.

The likely answer

A pink, salmon or orange slimy film in shower corners, around drains, in toilet bowls and on shower curtains. Slick rather than fuzzy, and it smears rather than brushing off as powder.

How to know it is this one

Slimy and smearing rather than fuzzy or powdery.

What it means: Soap residue plus constant moisture. Rinsing surfaces after use and drying them is more effective than any cleaner.

More on pink shower slime

Still not sure?

The key adds texture and surface, which separate these far better than colour does.

Identify it step by step