The prohibition will be in place for seven days.
Swimming has been banned across all beaches along the south Dublin coastline due to sewerage overflow.
The incident occurred at a Ringsend wastewater treatment plant on Tuesday and Wednesday following heavy rain and means that people will be prohibited from swimming at any south Dublin beach until next week.
All other coastal areas including bathing areas are also covered by the ban.
Dún Laoghaire Rathdown County Council issued a statement this afternoon saying that the HSE had advised the ban be enforced.
"As a consequence of this event Dún Laoghaire-Rathdown County Council, in consultation with the Health Service Executive, have put temporary bathing prohibition notices in place at all of our designated public bathing sites in the county, starting today 6th June," it reads.
"It is expected that this temporary prohibition notification will be in place for seven days. All areas along the Dún Laoghaire-Rathdown coastline whether designated as bathing areas or not are considered covered by this notice."
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Water sampling is due to take place at the following beaches over the next few days:
- Seapoint Beach
- Sandycove Beach
- The Forty Foot Bathing Area
- Killiney Beach
- White Rock Beach
The HSE also advised bathers, beach users, and anybody organising any water or coast-based activity to particular attention to the notice.
The ban is expected to be lifted on Wednesday, June 13.
