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 | 312 | 19 | 14 | 146 | 52 | 60 |
| Summer | 137 | 12 | 9 | 41 | 24 | 32 |
| Winter | 138 | 27 | 21 | 146 | 66 | 86 |