| Rank | Location | Max recorded PM2.5 | |
|---|---|---|---|
| 1 | Ennis, Co. Clare | 241μg/m3 | 8 |
| 2 | Tralee Library, Co. Kerry | 193μg/m3 | 4 |
| 3 | Mountrath, Co. Laois | 162μg/m3 | 1 |
| 4 | Buncranna, Co. Donegal | 161μg/m3 | 3 |
| 5 | Letterkenny, Co. Donegal | 130μg/m3 | 4 |
| 6 | Edenderry Library, Co. Offaly | 124μg/m3 | 3 |
| 7 | Wexford Opera House | 118μg/m3 | 2 |
| 8 | Enniscorthy, Co. Wexford | 106μg/m3 | |
| 9 | Birr, Co. Offaly | 104μg/m3 | |
| 10 | Achill Island, Co. Mayo | 103μg/m3 |