Parameter
|
Unit
|
Mean
|
Percentiles
|
---|
| | |
10
|
25
|
50
|
75
|
90
|
---|
Pollutants
| | | | | | | |
PM10
|
μg/m3
|
36.0*
|
21.6
|
26.3
|
33.2
|
41.5
|
52.6
|
NO2
|
μg/m3
|
41.5
|
24.8
|
32.7
|
40.8
|
49.7
|
58.6
|
SO2
|
μg/m3
|
3.4
|
0.6
|
1.2
|
2.6
|
4.5
|
6.9
|
CO
|
mg/m3
|
1.1
|
0.4
|
0.6
|
0.9
|
1.5
|
2.1
|
Differences "event-control" days
| | | | | | | |
PM10
|
μg/m3
|
11.8
|
1.4
|
4.2
|
8.9
|
15.6
|
24.1
|
NO2
|
μg/m3
|
10.8
|
1.7
|
4.1
|
9.0
|
15.2
|
22.1
|
SO2
|
μg/m3
|
2.2
|
0.3
|
0.6
|
1.4
|
2.8
|
5.0
|
CO
|
mg/m3
|
0.4
|
0.0
|
0.1
|
0.3
|
0.6
|
0.9
|
Weather variables
| | | | | | | |
Air temperature
|
°C
|
18.6
|
10.7
|
13.3
|
18.7
|
23.8
|
26.7
|
Relative humidity %
|
%
|
58.8
|
44.2
|
51.3
|
59.8
|
66.9
|
72.1
|
Atmospheric pressure
|
mbars
|
994.2
|
987.6
|
990.7
|
993.9
|
997.8
|
1001.3
|
Precipitation
|
mm
|
0.1
|
0.0
|
0.0
|
0.0
|
0.0
|
0.3
|
Wind speed
|
m/s
|
3.2
|
1.6
|
2.0
|
2.6
|
4.1
|
6.1
|
- January 2005 - December 2007
- * on a cumulative basis, about 45% of the daily observations exceeded threshold.