The water quality problem that had been affecting beaches in Dublin and Meath is now affecting coastal areas of Co Louth.
Louth County Council chief executive Joan Martin issued a notice to local councillors yesterday evening to say that poor water quality results for Clogherhead and Templetown had resulted in Bathing Prohibitation Notices being issued.
Shelling Hill is also affected by the water quality.
This means that members of the public are asked not to enter the water at these three locations until further notice.
