| Rank | Location | Max recorded PM2.5 | |
|---|---|---|---|
| 1 | Claremorris, Co. Mayo | 326μg/m3 | |
| 2 | Enniscorthy, Co. Wexford | 51μg/m3 | 1 |
| 3 | Portlaoise, Co. Laois | 41μg/m3 | |
| 4 | Athlone Civic Centre & Library, Co. Westmeath | 35μg/m3 | |
| 5 | Sandymount Green, Dublin 4 | 28μg/m3 | 2 |
| 6 | Tipperary Town | 28μg/m3 | |
| 7 | Ringsend, Dublin 4 | 24μg/m3 | |
| 8 | Abbeyfeale, Limerick | 24μg/m3 | |
| 9 | Edenderry Library, Co. Offaly | 24μg/m3 | |
| 10 | Ennis, Co. Clare | 19μg/m3 |