A Boil Water Notice has been issued for the Newmarket Public Water Supply with immediate effect.
The Notice has been put in place due to elevated levels of turbidity caused by the adverse weather conditions overnight.
The notice affects over 9,500 people.
Areas impacted include: Newmarket, Kanturk, Meelin, Kilbrin, Castlemagner, Tullylease, Lismire, Knocknagree, Kiskeam, Ballydesmond, Cullen, Boherbue, Dromtariffe and Derrinagree.
To check if you affected by the Notice, go to the Irish Water website.
According to Irish Water and Cork County Council, water is safe to consume once boiled.