Dublin City Council has put a further temporary ban on bathing at Sandymount Strand, following tests on Friday.
Last Wednesday it was announced that water samples at Sandymount Strand did not comply with quality standards.
The council said bathing waters can be temporarily affected by weather and tidal conditions, faecal matter from dogs and birds, and temporary overflows from drains.
The results of analysis of a bathing water sample taken on Friday were received today.
They indicated that the water still did not meet minimum standards
The council has now erected notices at the beach prohibiting swimming on a temporary basis.
A further sample was taken today, with test results expected on Wednesday.