A Comparative Study to assess the Air quality of Ludhiana, India amid COVID-19

Abstract Air quality Index (AQI) is a tool which implemented to assess the qualitative and quantitative status of air pollutants. Four distinctive pollutants; PM10, PM2.5, SO2 NO2 were used compare prevailing ambient in study region-Ludhiana, industrial city north Indian state Punjab. The AQI for Ludhiana has been compared and, data same obtained Punjab Agricultural University, from Central Pollution Control Board (CPCB). fifteen days before after lockdown amid COVID-19. information uncovers that during period PM10 PM2.5 levels decreased by around 35 40%, might be clarified as conceivable decrease production sector, transportation, residue. revealed primary reason poor P.M 10 2.5 significantly reduced percent pandemic lockdown.