Distribution of Pumps around Northern Ireland (We've used the traditional counties, until such time as we can report a greater number of pumps.)
Take a look also at Brian McElherron's website which features his personal listing of Irish pumps, both in Northern Ireland and the Irish Republic, although it no longer seems to be updated these days.
However, if you wish specifically to research the pumps of the Irish Republic, the Irish National Inventory of Architectural Heritage has established a superb online resource which amongst many other subjects catalogues a vast number of pumps, water pillars and hydrants.