Yearly statistics for NO
x
The stations are sorted according to type of site.
Unit: µg(NO)/m
3
NO
(hour) 1997
Traffic:
Copenhagen/1257
Odense/9155
Aalborg/8151
Urban backgr.:
Copenhagen/1259
Odense/9159
Aalborg/8159
Rural:
Ll. Valby/2090
Keldsnor/9055
Number
Average
Median
98-perc
99.9-perc.
8308
60
35
256
501
8648
48
23
263
471
6386
78
47
341
596
8614
7
2
52
191
8524
8
4
56
203
6421
8
3
65
280
8580
3
1
37
182
8713
2
1
13
59
Unit: µg(NO
2
)/m
3
NO
2
(hour) 1997
Traffic:
Copenhagen/1257
Odense/9155
Aalborg/8151
Urban backgr.:
Copenhagen/1259
Odense/9159
Aalborg/8159
Rural:
Ll. Valby/2090
Keldsnor/9055
Number
Average
Median
98-perc
99.9-perc.
8308
43
42
84
123
8648
36
32
88
134
6385
34
31
85
128
8614
28
24
72
97
8542
23
20
64
92
6623
19
16
58
111
8581
15
11
51
78
8704
12
8
47
92
Limit value
Guide value
>6570
-
-
200
-
-
-
50
135
-
The limit values are implemented in Denmark by Regulation nr. 119 of 12. March 1987 issued by the ministry of Environment..
Overview of NO
x
Updated 980721
K. Kemp