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 16 NO2 15 NO2
1 15 PM10 14 NO2
2 18 PM10 11 PM10
3 16 PM10 14 PM10
4 19 NO2 11 PM10
5 23 NO2 14 PM10
6 27 PM10 15 PM10
7 23 NO2 12 PM10
8 21 NO2 11 NO2
9 21 NO2 11 NO2
10 17 NO2 13 O3
11 18 NO2 16 O3
12 16 PM10 13 O3
13 17 NO2 18 O3
14 14 PM10 13 O3
15 18 NO2 18 O3
16 15 NO2 17 O3
17 16 NO2 16 O3
18 - -
19 - -
20 - -
21 38 PM10 26 NO2
22 - -
23 - -

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

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