**3.3 PM over different locations of DEL and GW**

As the long-range transport and buildup furthermore has a gigantic responsibility in the social event or dispersing of contaminations at metropolitan districts [24]. *Consequence of Meteorological Parameters on the Transmission of Covid-19 DOI: http://dx.doi.org/10.5772/intechopen.98978*

Further, the centralization of PM1.0, PM2.5 and PM10 for seven particular spaces of DEL and GW were bankrupt down and amazed for the situation and Box and whisker plot to perceive the possible impact of lockdown (**Figure 6a**–**c**).

Before lockdown and during lockdown season of the assessment are perceived by the letter B and A, independently. Preceding lockdown, the mean assembly of PM1.0 and PM2.5 over IIT-DEL, GK, LR, MGS, RJ, SP, and USE were noticed as 89.29 ± 45.51 μg-m−3, 57.07 ± 32.70 μg-m−3, 90.01 ± 40.72 μg-m−3, 70.35 ± 28.33 μg-m−3, 133.18 ± 68.15 μg-m−3, 97.53 ± 49.39 μgm−3, 121.31 ± 54.03 μgm−3 and 146.67 ± 78.63 μg-m−3, 85.04 ± 51.02 μg-m−3, 162.04 ± 91.42 μg-m−3, 124.75 ± 57.26 μg-m−3, 218.38 ± 144.20 μg-m−3, 163 ± 88.94 μg-m−3,

#### **Figure 6.**

*Boxplots of daily concentrations of analyzed pollutants over different locations of Delhi and Gurgaon; median is shown by the middle line of the box. Concentrations are expressed in* μ*g- m−3 for PM1.0 (a), PM2.5 (b) and PM10 (c). (letter "B" and "A" represents the boxes related to before lock down and during lockdown respectively).*

191.09 ± 94.03 μg-m−3, separately (**Figure 5a** and **b**). In any case, the mean assembly of PM1.0 in the above said regions was 166 ± 89.47 μg-m−3, 103.33 ± 60.19 μg-m−3, 187.32 ± 116.52 μg-m−3, 134.78 ± 63.75 μg-m−3, 283.46 ± 161.89 μg-m−3, 200.83 ± 112.21 μg-m−3, 205 ± 105.07 μg-m−3, separately as portrayed in **Figure 6c**.

The GW area shows the lower PM fixation i.e. 43.31 ± 20.25 μg-m−3 (PM1.0), 66.55 ± 29.94 μg-m−3 (PM2.5) and 72.63 ± 33.10 μg-m−3 (PM 10) as contrast with DEL during the range of before lockdown. The normal PM2.5 and PM10 focuses over the distinctive examination site of DEL and GW districts are at higher side than the given furthest reaches of NAAQS (PM2.5 = 40 μg-m−3) and PM10 = 60 μg-m−3) [2]. Prior to lockdown circumstance, the most noteworthy PM1.0 esteems were found over the RJ showing mean of 133.18 μg-m−3 and is trailed by USE, SP, LR, IIT, MGS and GW, separately. The high interquartile range (RJ, USE, SP and LR) recommends that PM1.0 hold very extraordinary fixation exhibiting the enormous spread (56.95-203.85 μg-m−3). The enormous upper stubble over the area IIT-DEL, SP and USE shows that the PM1.0 focus fluctuates among the best quartile bunch. The upper portions of the scale i.e. positive quartile bunch comparing to practically all areas with the exception of RJ shows the articulated inconstancy in the centralization of PM1.0, however, in case of least positive quartile group, the concentration spread is relatively less. However, the box plots related to before lockdown, show enormous focus disseminations of PM1.0 while the box plot associated to during lockdown shows the slight scattering that delineate the limit decrease in the grouping of PM1.0.

According to the past examinations, PM2.5 involves with various dangerous constituents, which may go into the lungs through the respiratory track and unsafe to the human wellbeing, chiefly to youngsters and the older individuals [25]. The recently directed investigation, uncover the particulate matter as one of prime explanation for damaging outcome on the human respiratory framework by stressing to take repetitive clinical remedy [11]. The spread and inconstancy of PM2.5 focus has been summed up in box plots as portrayed **Figure 6b**. The most noteworthy mean grouping of fine particulate matter PM2.5 (218.37 μg-m−3), was seen over RJ during before lockdown period and 63.41 μg-m−3 during the lockdown period. The incredibly upper and lower stubbles (before lockdown) show the instance of least quartile that compares to less articulated conduct of PM2.5 focus because of the less number of information (4 days) over RJ locale. Notwithstanding that, the territories LR, SP and USE divulges the huge upper bristle shows the observable irregularity in the convergence of PM2.5.

As contrast with DEL district, GW locale (**Figure 6b**) clarify the low mean PM2.5 focus checking information as 73.51 μg-m−3 (13.98 μg-m−3-188.04 μg-m−3) related to earlier lockdown (GW-B) that decreased to 31.97 μg-m−3 (12 μg-m−3- 60.83 μg-m−3) because of the lockdown (GW-A). The lockdown sway was liable for the unexpected fall in PM2.5 focuses because of cross country limitation on transport development and modern units that related to the emanation of essential toxins into the area. Prior to lockdown period, the relating areas of DEL and GW were high PM2.5 focus which upholds the finding of surrounding PM2.5 fixations higher more noteworthy than 60 μg-m−3 over New Delhi [6, 26]. This may be because of the area of the site that is near traffic and private contamination sources [20, 27]. According to above discoveries, an extremely different source of PM concentration has been seen in the examined area. **Figure 6c** divulges the mean convergence of PM10 by showing the most noteworthy worth over RJ (283.46 μg-m−3) followed by USE (205.82 μg-m−3) and SP (200.83 μg-m−3) related to before lockdown period that further began to disintegrate to 69.36 μg-m−3(RJ), 58.64 μg-m−3(USE) and 53.59 μg-m−3 (SP) because of the lockdown impact. The area GW shows the mean convergence of 72.63 μg-m−3 (preceding lock down)

and 34.28 μg-m−3(during lockdown) which and both are extremely close endorsed breaking point of 60 μg-m−3 given by NAAQS.
