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1. City SO2 (μg/m3)NO2 (μg/m3)RSPM (μg/m3)SPM (μg/m3)Main Causes of Air Pollution Description
Agra 10 27 190 430 Foundry industries, high vehicular growth Spread over 140 sq. km with 9.5 lakhs population
Bangalore 11 48 73 140 Industrial activities, diesel generators Major industrial, commercial, and IT center
Chennai 12 32 70 140 Industrial boilers, generator sets Surface, sea, and air transport services
Hyderabad 8 20 60 230 Vehicular emissions, unburnt hydrocarbons, COKnown for wealth, 11 lakh vehicles around the city
Jharia 16 46 160 290 Coal mining, small-scale industries Coal mining with numerous mines, 103 small-scale industries
Kanpur 14 17 190 410 Industrial and commercial activities Main center of industrial and commercial activities
Kolkata 14 45 140 310 Vehicle pollutants, industries, power plantsIron foundries, mills, power plants, large-scale industries
Delhi 11 48 130 290 Thermal powerplants, vehicular emissions Highly crowded, industrial outskirts
Lucknow 11 28 190 410 Small and medium industries Most populous state with silver, copper, brass, cotton industries