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 | 364 | 30 | 27 | 139 | 67 | 84 |
| Summer | 152 | 32 | 31 | 139 | 70 | 80 |
| Winter | 151 | 28 | 26 | 84 | 60 | 72 |