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

Hour
Index value Pollutant Index value Pollutant
0 14 PM10 9 PM10
1 14 NO2 9 PM10
2 13 NO2 9 PM10
3 15 NO2 9 PM10
4 17 NO2 9 PM10
5 25 NO2 8 PM10
6 24 NO2 10 PM10
7 25 NO2 9 PM10
8 22 NO2 12 PM10
9 26 NO2 12 O3
10 21 NO2 13 O3
11 20 PM10 14 O3
12 20 NO2 18 NO2
13 21 PM10 16 O3
14 24 NO2 17 O3
15 23 NO2 18 O3
16 23 NO2 17 O3
17 24 NO2 17 O3
18 31 NO2 15 O3
19 36 NO2 13 O3
20 33 PM10 14 PM10
21 33 PM10 17 NO2
22 39 PM10 17 NO2
23 29 PM10 16 NO2

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

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