Table 4 - 6 in Saidabad Water Treatment Plant Project, Phase III

Table 4-6: Ambient Air Quality Standards PollutantTime Weighted AverageConcentration in Ambient AirNational Industrial, Residential, Rural and other Areas (μg/m3) (ECR’97)WHO Guideline Value in μg/m3Sulfur Dioxide (SO2), μg/m324 hrs.80 μg/m3125 (Interim target-1)50 (Interim target-2)20 (guideline)1 hrs250 μg/m3500 (guideline)Nitrogen Dioxide (NO2), μg/m3Annual40 μg/m340 (guideline)1 hr.80 μg/m3200 (guideline)Particulate Matter (size less than 10 μm) or PM10, μg/m3Annual50 μg/ m3 (ii)70 (Interim target-1)50 (Interim target-2)30 (Interim target-3)20 (guideline)24 hrs.150 μg/ m3 (iii)150 (Interim target-1)100 (Interim target-2)75 (Interim target-3)50 (guideline)Particulate Matter (size less than 2.5 μm) or PM2.5, μg/m3Annual35 μg/ m335 (Interim target-1)25 (Interim target-2)15 (Interim target-3)10 (guideline)24 hrs.65 μg/ m375 (Interim target-1)50 (Interim target-2)37.5 (Interim target-3)25 (guideline)Ozone (O3), μg/m38 hrs.100 μg/m3160 (Interim target-1)100 (guideline1 hr.180 μg/m3Lead (Pb), μg/m3Annual0.25 μg/m324 hrs0.50 μg/m3