Table 1.

Total variation of pollutants in lockdown period.

Period	Avg. pollutant concentration (μg /m3)
	PM10	NO2	SO2	O3	Aerosol
Lockdown (24 Mar to 20 May, 2020)	44.94	12.67	9.15	38.66	40.67
Before lockdown (17 Feb to 23 Mar, 2020)	91.74	40.06	15.35	67.33	96.66
Total variation (avg.)	−46.79	−27.39	−6.20	−28.67	−55.99
% of variation	−51.01	−68.38	−40.38	−42.58	−57.92

Sources: CPCB|Central Pollution Control Board, 2020.