Fingal County Council has issued a precautionary warning about swimming at three north Dublin beaches, due to a risk of pollution.

Last night’s heavy rain has led to a short term overflow at a pump station in Portmarnock.

Beach users are being warned to avoid swallowing or splashing water and washing hands before handling food.

People are being asked to avoid swimming at Portmarnock, Claremont and Sutton if they have an open cut or wound, if they are pregnant or have a weakened immune system.

‘Do Not Swim’ notices are currently in force at four other beaches in Fingal due to a suspected deterioration in water quality. The beaches are open but swimming is prohibited at Balbriggan, Skerries, Loughshinny and Rush.

Water samples were taken all seven locations today with test results due back by the end of the week.