Galway County Council has imposed a temporary swimming ban at East End Beach on Inishbofin due to elevated bacteria levels.
Samples taken from the beach on Monday, May 26 tested positive for elevated levels of e.coli and enterococci bacteria.
This was likely caused by heavy rainfall levels in the preceding days.
The county council has issued a swimming ban on foot of this, which is expected to last until late next week.
Further water sampling will be done in the coming days and further advice will be issued when these results are received.