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 | 195 | 0.04 | 0.04 | 0.19 | 0.09 | 0.10 |
| Summer | 83 | 0.03 | 0.03 | 0.09 | 0.05 | 0.06 |
| Winter | 82 | 0.05 | 0.04 | 0.19 | 0.10 | 0.11 |