A boil water notice for Wexford town is in place, after heavy rain caused problems at the water treatment plant.
The water supply to around 40,000 customers in the county has been impacted.
Crews from Irish Water and Wexford County Council tried to rectify the turbidity, or cloudiness, in the water yesterday.
After they were unable to resolve the issue, a boil water notice was issued for all areas which are supplied by the Wexford Town Public Water Supply.
Ronan Walsh, Operational Lead with Irish Water, was speaking to South East Radio today, and has apologised to customers:
"I would like to apologise on behalf of Irish Water for the inconvenience to customers. If people have any queries, they can find lot of information on our website or call 1800 278 278."
Labour Councillor with Wexford County Council, George Lawlor, says:
"As a result of a lack of investment in the treatment plant in Wexford Town, we have difficulties that we cannot overcome at this point, unless we issue the boil water notice."