Covid-19 was first discovered in Jakarta in February 2020 and began to become epidemic around mid-March 2020. The government implemented a Large-Scale Social Restriction (LSSR) policy as an effort to suppress the widespread of viruses. This policy causes a decrease in public mobility 2020 which is believed to cause air quality improvement. This study was conducted to determine changes in air quality using ground surface measurement data and satellite products (OMI, AIRS, and MERRA-2) on the atmospheric gas parameters (NOx, CO, and SO2) for the period of 2019-2020. Potential sources of emissions due to changes in activities in DKI Jakarta were quantified and their relationship to air quality improvements was analyzed. The emission inventory was carried out using the Workbook of Atmospheric Brown Cloud-Emission Inventory Manual. In 2020 the results of air quality monitoring showed a decrease for CO and NO2 parameters, except SO2. The calculation of potential emission sources showed significant decrease in activity for the power generation sector, manufacturing industry, and transportation of 50.5%, 37.2%, and 56.9%, respectively. Fuel consumption in the residential sector did not decrease due to work from home with the emission load value increasing by 2.9% in 2020. The largest contributor of emissions comes from the on-road transportation sector.

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