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Black Slime

Black slime or pink/orange staining can occur around taps, showerheads, washing machine drawers or grout and is caused by airborne fungi and mould spores. The spores do not originate from the drinking water and do not imply any problem with the water but are present in the air and grow on contact with standing water. The situation is worst in areas that are damp and poorly ventilated or if aerosols or other sprays are used that can be utilised as a nutrient.

The solution to the problem is to try and improve ventilation if possible, to wipe down wet surfaces and regular cleaning with a household cleaning agent.