Question : What is that white stuff on the wall mounted drinking water fountain?
I always drink water from the wall mounted drinking water fountain at work. There is some white stuff on the nozzle of the water fountain. Is it harmful? Does anyone know what it could be?

The water does not come out uniformly. Part of the water touches the inner part of the nozzle.
wall water fountains

Best answer:

Answer by Tio
just mineral build up from the water.