Govt rules & Regulation > Pollution laws > Air pollution Laws

Air quality Standards

Air Quality Standards

  • The existing standards for National Ambient Air Quality (NAAQ)

 

          Pollutant Time Weighted Average Concentration in Ambient Air (mg/m3)
Industrial Area Residential, Rural & Other Areas    
Sulphur dioxide (SO2) Annual Average 80 60    
24 Hours 120 80    
Oxides of Nitrogen (NOx) Annual Average 80 60    
24 Hours 120 80    
Suspended Particulate Matter (SPM) Annual Average 360 140    
24 Hours 500 200    
Respirable Particulate Matter (Size less than 10 microns) Annual Average 120 60    
24 Hours 150 100    
Lead (Pb) Annual Average 1.0 0.75    
24 Hours 1.5 1.0    
Carbon monoxide (CO) 8 Hours 5000 2000    
1 Hour 10000 4000    
Ammonia Annual Average 100 100    
24 Hours 400 400    
             

 

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