Four north Dublin beaches have been issued with Temporary Do Not Swim notices by Fingal County Council.
Rush North, Skerries South and Front Strand and Balbriggan Beach have been issued the notices, which will remain in place for four days.
The notices were issued due to an an increase in bacteria levels in the results of the bathing water samples taken yesterday.
The council said the likely cause of the increase is urban and agricultural run-off and an investigation has commenced.
A council spokesperson said: "A seawater re-sample will be taken tomorrow August 27th at these beaches, the results will be available on 29th August, 2020 and the Do not Swim notices will be reviewed.
"The beaches remain open but beach users are asked to respect the ‘Do Not Swim’ notices as they have been put in place to ensure that the health of bathers is not compromised.
"Members of the public can check for water quality at any of the monitored bathing waters in Ireland in advance by accessing the EPA website at www.beaches.ie or by checking the notice board at the entrance to each beach."
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