Table 3.

Pollutant concentration, average rainfall, wind speed, and temperature data of Chennai

Months	Concentration of pollutants (µg/m3)				Meteorological parameters
	PM2.5	PM10	NO2	SO2	Rainfall (mm/day)	Wind speed (m/s)	Temperature (°C)
Jan-20	40.72 ± 21.50	64.24 ± 28.99	7.03 ± 1.91	15.12 ± 4.97	0.87	2.52	24.75
Feb-20	24.45 ± 6.02	66.52 ± 19.43	6.23 ± 3.63	11.48 ± 3.62	0.01	2.91	25.98
Mar-20	10.99 ± 10.16	37.66 ± 36.22	7.9 ± 3.78	7.32 ± 0.46	0.02	2.88	28.8
Apr-20	11.27 ± 5.34	114.83 ± 43.38	6.83 ± 2.08	6.86 ± 0.14	1.56	3.15	30.55
May-20	14.32 ± 5.21	9.81 ± 45.55	7.09 ± 4.12	101.88 ± 0.15	2.94	3.12	31.19
Jun-20	15.47 ± 6.91	46.46 ± 28.30	13.84 ± 1.75	7.17 ± 0.46	2.43	3.01	30.73
Jul-20	15.62 ± 10.36	40.68 ± 21.37	13.14 ± 2.93	5.12 ± 1.46	6.28	2.88	28.47
Aug-20	21.14 ± 9.29	48.96 ± 15.48	12.80 ± 7.74	4.22 ± 0.54	3.86	2.72	28.37
Sep-20	15.21 ± 4.89	40.53 ± 12.06	7.26 ± 3.72	4.33 ± 0.31	5.91	2.76	27.63
Oct-20	31.97 ± 13.21	58.30 ± 13.93	6.65 ± 3.37	3.86 ± 1.84	4.85	2.31	27.43
Nov-20	35.63 ± 23.10	58.68 ± 23.88	8.26 ± 6.81	8.85 ± 2.59	15.36	3.42	26.28
Dec-20	38.50 ± 16.06	84.28 ± 22.78	7.49 ± 1.96	10.35 ± 1.14	6.9	3.45	24.58
Jan-21	41.80 ± 16.57	81.46 ± 27.31	10.74 ± 1.83	8.53 ± 0.41	3.74	2.77	24.63
Feb-21	48.29 ± 12.78	80.50 ± 19.81	17.03 ± 6.51	9.28 ± 2.21	0.94	2.65	24.24
Mar-21	34.40 ± 13.39	69.08 ± 27.54	14.71 ± 1.78	13.21 ± 16.38	0	2.22	27.55