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Air Quality Index

Air quality Index O3
1 hour average
PM10
  24 hour average
NO2
1 hour average
SO2
1 hour average.
CO
  8 hour average
unpolluted
1
0 - 33
0 - 20
0 - 25
0 - 25
0 - 1000
very slightly polluted
2
>33 - 65
>20 - 40
>25 - 50
>25 - 50
>1000 - 2000
slightly polluted
3
>65 - 120
>40 - 70
>50 - 100
>50 - 120
>2000 - 4000
polluted
4
>120 - 180
>70 - 90
>100 - 200
>120 - 350
>4000 - 10000
very polluted
5
>180 - 240
>90 - 180
>200 - 400
>350 - 500
>10000 - 30000
polluted-threat
6
above 240
above 180
above 400
above 500
above 30000

Imission monitoring (C) 2010