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Air Quality Index

Air qualityIndexO3
1h-average
PM10
1h-average
NO2
1h-average
SO2
1h-average
CO
8h-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 nad 240 nad 180 nad 400 nad 500 nad 30000