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 | 350 | 17 | 13 | 105 | 48 | 55 |
| Summer | 138 | 12 | 7 | 105 | 44 | 68 |
| Winter | 151 | 20 | 17 | 55 | 45 | 50 |