Monthly average concentrations
Measuring period: April 1994 - March 1995| Period | Nr. of samples | Cavg (ug/m3) | C50 (ug/m3) | Cmax (ug/m3) |
C95 (ug/m3) | C98 (ug/m3) |
| All | 347 | 25 | 21 | 100 | 62 | 69 |
| Summer | 136 | 17 | 14 | 48 | 36 | 43 |
| Winter | 150 | 32 | 29 | 100 | 66 | 78 |