| Season | PM10 concentration | % Frequency |
| June-September 2012 | >1000 | 2 |
| 500 - 1000 | 23 | |
| 340 - 500 | 19 | |
| 180 - 340 | 55 | |
| <180 | 0 | |
| October-January | >1000 | 1 |
| 500 - 1000 | 5 | |
| 340 - 500 | 15 | |
| 200 - 340 | 40 | |
| 100 - 200 | 31 | |
| 50 - 100 | 7 | |
| Feb-March | >1000 | 5 |
| 500 - 1000 | 17 | |
| 340 - 500 | 18.5 | |
| 200 - 340 | 47.5 | |
| 100 - 200 | 12 | |
| 50 - 100 | 0 | |
| June-October | >1000 | 3 |
| 500 - 1000 | 12 | |
| 340 - 500 | 11 | |
| 200 - 340 | 30 | |
| 100 - 200 | 43 |