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 | 0.02 | 0.02 | 0.04 | 0.03 | 0.04 |
| Summer | 76 | 0.02 | 0.02 | 0.04 | 0.04 | 0.04 |
| Winter | 74 | 0.02 | 0.02 | 0.03 | 0.04 | 0.04 |