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

Hour
Index value Pollutant Index value Pollutant
0 20 NO2 12 O3
1 18 NO2 12 NO2
2 18 NO2 16 NO2
3 18 NO2 24 PM10
4 44 PM10 18 NO2
5 23 PM10 18 NO2
6 31 PM10 22 PM10
7 50 PM10 16 PM10
8 33 PM10 -
9 30 PM10 -
10 12 NO2 28 O3
11 14 PM10 30 O3
12 14 NO2 30 O3
13 17 PM10 32 O3
14 18 PM10 34 O3
15 11 NO2 35 O3
16 12 NO2 32 O3
17 42 NO2 21 NO2
18 43 NO2 22 NO2
19 38 NO2 23 NO2
20 34 NO2 22 NO2
21 31 PM10 24 NO2
22 21 NO2 17 NO2
23 27 PM10 21 PM10

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

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