Number of health effectdays in
Belgium since 1979
(health effectday : day with at least 1 exceedance of 120 µg/m³ ozone by the daily
maximal 8h-average)
This is the number of days in whish at least one monitoring station in Belgium registers that the WHO guideline (120 µg/m³) has been exceeded.
This indicator provides no information on the scope or the duration of the excess. The reported number of days depends in fact on the number of monitoring stations, and thus excludes any comparison between periods or regions with a different density if monitoring stations.
year |
jan |
febr |
march |
april |
may |
june |
july |
august |
sept |
oct |
nov |
dec |
sum |
1979 |
0 |
0 |
0 |
10 |
7 |
4 |
2 |
0 |
0 |
0 |
0 |
0 |
23 |
1980 |
0 |
0 |
0 |
1 |
4 |
4 |
3 |
1 |
2 |
0 |
0 |
0 |
15 |
1981 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
8 |
1 |
0 |
0 |
0 |
10 |
1982 |
0 |
0 |
0 |
0 |
11 |
8 |
13 |
5 |
1 |
0 |
0 |
0 |
38 |
1983 |
0 |
0 |
0 |
1 |
5 |
2 |
22 |
14 |
2 |
0 |
0 |
1 |
47 |
1984 |
0 |
0 |
0 |
4 |
3 |
12 |
14 |
17 |
1 |
0 |
0 |
0 |
51 |
1985 |
0 |
0 |
0 |
0 |
3 |
5 |
7 |
4 |
4 |
0 |
0 |
0 |
23 |
1986 |
0 |
0 |
3 |
0 |
4 |
4 |
3 |
5 |
3 |
4 |
0 |
1 |
27 |
1987 |
0 |
0 |
0 |
9 |
4 |
1 |
11 |
2 |
1 |
0 |
0 |
0 |
28 |
1988 |
0 |
0 |
0 |
2 |
6 |
3 |
0 |
10 |
2 |
0 |
0 |
0 |
23 |
1989 |
0 |
0 |
0 |
2 |
16 |
12 |
16 |
13 |
9 |
0 |
0 |
0 |
68 |
1990 |
0 |
0 |
2 |
10 |
16 |
8 |
13 |
19 |
0 |
0 |
0 |
0 |
68 |
1991 |
0 |
0 |
0 |
6 |
1 |
0 |
13 |
3 |
6 |
0 |
0 |
0 |
29 |
1992 |
0 |
0 |
0 |
1 |
13 |
9 |
9 |
5 |
0 |
0 |
0 |
0 |
37 |
1993 |
0 |
0 |
0 |
5 |
7 |
10 |
6 |
3 |
0 |
0 |
0 |
0 |
31 |
1994 |
0 |
0 |
0 |
2 |
3 |
14 |
26 |
7 |
0 |
0 |
0 |
0 |
52 |
1995 |
0 |
0 |
0 |
0 |
9 |
6 |
20 |
19 |
0 |
0 |
0 |
0 |
54 |
1996 |
0 |
0 |
1 |
10 |
2 |
12 |
7 |
11 |
0 |
0 |
0 |
0 |
43 |
1997 |
0 |
0 |
0 |
2 |
8 |
8 |
7 |
20 |
2 |
0 |
0 |
0 |
47 |
1998 |
0 |
0 |
2 |
0 |
13 |
3 |
3 |
10 |
0 |
0 |
0 |
0 |
31 |
1999 |
0 |
0 |
0 |
3 |
8 |
10 |
15 |
11 |
10 |
0 |
0 |
0 |
57 |
| 2000 | 0 | 0 | 0 | 1 | 8 | 8 | 0 | 7 | 0 | 0 | 0 | 0 | 24 |
sum |
0 |
0 |
8 |
69 |
151 |
143 |
211 |
194 |
44 |
4 |
0 |
2 |
826 |
avg |
0.0 |
0.0 |
0.4 |
3.1 |
6.9 |
6.5 |
9.6 |
8.8 |
2.0 |
0.2 |
0.0 |
0.1 |
37.5 |
avg since 89 |
0.0 |
0.0 |
0.4 |
3.5 |
8.7 |
8.3 |
11.3 |
10.7 |
2.3 |
0.0 |
0.0 |
0.0 |
45.1 |