Energy and Environment
Pollutant (yearly average) SO2 NO2 CO (24 hourly average) O3 (8 hourly average) PM10 PM2.5
Concentration limits Grade I Grade II 20 40 4
60 40 4
100 40 15
160 70 35
Unit
Îźg/m3 mg/m3 Îźg/m3
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