Pollution Level (ug/m³) ×
Pollutant Low Moderate High Very High
SO2 0 - 150 150 - 250 250 - 350 > 350
PM10 0 - 50 50 - 100 100 - 200 > 200
PM2.5 0 - 25 25 - 50 50 - 100 > 100
NO2 0 - 100 100 - 150 150 - 200 > 200
O3 0 - 100 100 - 130 130 - 160 > 160
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