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Air quality index

 
Air quality Index NO2
1h
SO2
1h
unpolluted 1 0-25 0-25
very slightly polluted 2 25-50 25-50
slightly polluted 3 50-100 50-120
polluted 4 100-200 120-350
very polluted 5 200-400 350-500
polluted - danger 6 nad 400 nad 500

Imission monitoring (C) 2014