Question raised in Rajya Sabha on Pollution in the cities, 24/06/2019. Data of 43 million plus cities has been analysed for various pollutants during 20152017. Analysis of data revealed that SO2 levels were within the National Ambient Air Quality Standard (NAAQS). With respect to NO2, 14 cities showed an increasing trend, 14 cities showed a decreasing concentration, 14 cities showed a fluctuating trend and 1 city revealed steady concentration. With respect to PM10, 14 cities showed an increasing trend, 8 cities showed a decreasing concentration, 21 cities showed a fluctuating trend. With respect to PM2.5, trends are available for 15 cities and out of 15 cities, 05 cities showed an increasing trend, 04 cities showed a decreasing concentration, 06 cities showed a fluctuating trend.
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