Urban | Rural | |||||||
Days n | Mean | Median | Min.–max. | Days n | Mean | Median | Min.–max. | |
Winter 1993/1994 | ||||||||
PM10 | 89 | 41.5 | 34.6 | 12.1–112.7 | 87 | 44.1 | 30.4 | 7.9–242.2 |
BS | 90 | 14.2 | 11.3 | 0–47.8 | 92 | 13.5 | 9.5 | 1.5–58.1 |
SO2 | 91 | 11.8 | 10.2 | 2.7–33.5 | 92 | 8.2 | 4.4 | 0.8–41.5 |
NO2 | 92 | 46.0 | 47.0 | 22.2–75.9 | 92 | 26.6 | 24.0 | 6.5–54.3 |
Winter 1994/1995 | ||||||||
PM10 | 82 | 31.1 | 28.9 | 8.8–89.9 | 81 | 26.6 | 23.7 | 7.1–96.9 |
BS | 74 | 8.8 | 6.7 | 2.0–28.0 | 81 | 8.7 | 5.6 | 0.0–43.0 |
SO2 | 82 | 8.3 | 7.4 | 0.6–24.4 | 80 | 4.3 | 3.7 | 0.5–17.0 |
NO2 | 82 | 46.7 | 48.3 | 26.0–82.3 | 80 | 23.7 | 21.4 | 1.6–57.1 |
Min.: minimun; max.: maximum; PM10: particulate matter with a diameter <10 µm; BS: black smoke; SO2: sulphur dioxoide; NO2: nitrogen dioxide. There were no significant differences between the urban and rural air pollution concentrations.