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Legend :
Pollution Index Value
Very Low   0 / 25
Low   25 / 50
Medium   50 / 75
High   75 / 100
Very High   > 100
Zurich Yesterday Details

Hour
Index value Pollutant Index value Pollutant
0 9 NO2 19 O3
1 10 NO2 23 O3
2 6 NO2 27 O3
3 8 NO2 27 O3
4 11 NO2 27 O3
5 24 NO2 25 O3
6 13 NO2 24 O3
7 15 NO2 24 O3
8 7 NO2 24 O3
9 5 NO2 25 O3
10 5 PM10 25 O3
11 8 NO2 25 O3
12 9 NO2 24 O3
13 20 NO2 23 O3
14 15 NO2 21 O3
15 13 NO2 19 O3
16 11 NO2 22 O3
17 10 NO2 25 O3
18 10 NO2 26 O3
19 8 NO2 27 O3
20 5 NO2 28 O3
21 5 NO2 29 O3
22 5 NO2 28 O3
23 4 NO2 28 O3

NB: the pollutant with the highest value at a certain time determines the overall score of that time

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