Uisce Éireann has told an Oireachtas committee that clear water is safe to drink, even though the HSE has told the same committee that water colour does not relate to the safety of drinking water. Appearing before the Oireachtas joint committee on housing last week, Pat O’Sullivan, Uisce Éireann’s drinking water compliance senior manager, repeated the company’s advice that clear water is safe to drink. “This primarily would relate to the metals manganese and iron, which can cause discolouration.