| Rank | Location | Max recorded PM2.5 | |
|---|---|---|---|
| 1 | Edenderry Library, Co. Offaly | 227μg/m3 | 1 |
| 2 | Ennis, Co. Clare | 207μg/m3 | 1 |
| 3 | Birr, Co. Offaly | 151μg/m3 | 1 |
| 4 | Dublin Port, Dublin 1 | 148μg/m3 | |
| 5 | Macroom, Co. Cork | 143μg/m3 | |
| 6 | Amiens Street, Dublin 1 | 141μg/m3 | |
| 7 | Tralee Library, Co. Kerry | 120μg/m3 | 4 |
| 8 | Tullamore, Co. Offaly | 118μg/m3 | |
| 9 | Portlaoise, Co. Laois | 105μg/m3 | 3 |
| 10 | St. John’s Road, Kilmainham, Dublin 8 | 103μg/m3 |