Central Pollution Control Board (CPCB) implements the National Ambient Air Quality Monitoring Programme (NAMP) through a network comprising 804 ambient air quality monitoring stations covering 344 cities/towns in 28 states and 6 union territories of the country as per the mandate under the Air (Prevention and Control of Pollution) Act, 1981 to collect, compile and disseminate information on air quality. Under the programme, ambient air quality is monitored in collaboration with State Pollution Control Boards (SPCBs), Pollution Control Committees (PCCs), and National Environmental Engineering Research Institute (NEERI). The data, thus generated, is transmitted to CPCB for scrutiny, analysis, compilation and its publication. The present report contains ambient air quality data for the calendar year 2019 and its analysis has been carried out in terms of exceedance in comparison to National Ambient Air Quality Standards. The concentration values for SO2, NO2, PM10 & PM2.5 is also analysed and presented separately for zones, coastal towns, industrial cities, million plus cities, non-attainment cities, ecologically sensitive areas etc.