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Legend (Airbase/Nitrogen_dioxide_NO2)

based on daily values (1)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on hourly values (2)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on variable time intervals (3)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on yearly values (4)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on monthly values (5)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on four weekly values (6)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on two weekly values (7)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on weekly values (8)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on daily values (10)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on hourly values (11)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on variable time intervals (12)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on yearly values (13)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on monthly values (14)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on four weekly values (15)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on two weekly values (16)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on weekly values (17)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on daily values (19)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on hourly values (20)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on variable time intervals (21)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on yearly values (22)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on monthly values (23)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on four weekly values (24)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on two weekly values (25)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on weekly values (26)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on daily values (28)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on hourly values (29)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on variable time intervals (30)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on yearly values (31)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on monthly values (32)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on four weekly values (33)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on two weekly values (34)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on weekly values (35)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on daily values (37)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on hourly values (38)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on variable time intervals (39)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on yearly values (40)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on monthly values (41)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on four weekly values (42)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on two weekly values (43)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on weekly values (44)
≤20 ≤20
20 - 30 20 - 30
30 - 40 30 - 40
40 - 50 40 - 50
>50 >50
based on hourly values (46)
≤50 ≤50
50 - 100 50 - 100
100 - 200 100 - 200
200 - 400 200 - 400
>400 >400
based on hourly values (48)
= 0 = 0
0 - 9 0 - 9
9 - 18 9 - 18
18 - 27 18 - 27
>27 >27
Airbase_Stations (49)
Background Background
Industrial Industrial
Traffic Traffic
Unknown Unknown
<all other values> <all other values>