Table 3.

Pre Covid PM 10 dispersion in part of Greater Chennai and Present Covid cases.

Pre Covid PM 10
Corona +ve incidence	Concentration Range in μg/m3	% Distribution
2	41–59	2.27
1	60–77	1.14
0	78–95	0.00
9	96–113	10.23
13	114–130	14.77
19	131–148	21.59
38	149–166	43.18
5	167–184	5.68
0	185–202	0.00
1	203–220	1.14