Hello,
That's a great question. The straightforward answer is yes, the tap water in Ireland - and specifically in Dunquin, County Kerry - is
safe to drink.
On rare occasions, a
boil water notice may be issued in a particular part of the country. On the off-chance that this affects your stay, you will be made aware by the proprietors.
It's worth pointing out that the Irish word for water is uisce. The Irish word for whiskey is uisce beatha, which can be translated as 'water of life'. So, whether you are enjoying the tap water or the whiskey in Ireland, you can rest assured that it is safe (and delicious!).
Regards,
Eoin