Swimming has been banned at Inny beach in south Kerry, the second such ban in the area this week.
The ban was put in place by Kerry County Council, at the request of the HSE, following the discovery of e-coli and other matter in the water by Irish Water.
The presence of e-coli is due to the recent amounts of high rainfall in the large Inny River catchment which has brought bacteria from the surrounding countryside into the bathing waters.
A spokesman for Kerry County Council said: "Following routine testing of the bathing waters at Inny beach, Waterville, which detected elevated levels of bacteria in the water and further to advice from the HSE, Kerry County Council has arranged for a notice prohibiting swimming at this location to be erected at Inny beach."
The notice which has been put up in accordance with the council's protocols under the bathing water regulations will remain in place until further testing shows a reduction in the bacteria levels in the bathing waters.
"Further tests are being carried out and the situation is being closely monitored," the council said.
This ban comes after a no-swimming notice was placed at nearby Waterville beach, on Sunday.
Bathing at Waterville was prohibited by Kerry County Council and Irish Water after lightning struck a pumping station serving the town's waste water treatment plant.
However bathing water quality tests at Waterville beach showed no elevated bacteria levels and the swimming ban has been lifted.
