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 | 186 | 0.07 | 0.06 | 0.50 | 0.12 | 0.20 |
| Summer | 76 | 0.05 | 0.05 | 0.50 | 0.07 | 0.10 |
| Winter | 74 | 0.08 | 0.07 | 0.20 | 0.15 | 0.15 |