The number of reported cases in India has been scaling up in geometric progression despite the stringent lockdown norms imposed to keep people indoors since late March. Interestingly, on 31st March there were 1117 affected cases, 33,610 on 30th April and 511,478 till June 26-an unprecedented rise in the numbers. In the present research article, we propose a differential equation-based mathematical model for modeling India's COVID-19 that incorporates the lockdown effect while looking at the future predictions in terms of the spread and the extent to which lockdown has been effective in India. We have estimated the growth of COVID-19 across India using modified SIR modeling, which is a Compartmental model in Epidemiology. Further, the use of SIQR model to estimate the growth of this disease across the country. Also, a constant factor has been introduced in the model to measure the number of corona-affected patients count due to any accidental mass crowd gathering. Along with that, we analyse the pollution level of India under three conditional scenarios viz. Pre-Lockdown, During Lockdown and After Lockdown. From the epidemiological evidences, it is evident that several pollutants like pm 2.5, NO 2 , SO 2 , O 3 , CO noxious effects of pollution. Here we will analyse the basic contributing factor of pollution and which majorly impacts AQI. We will also visualise the change of AQI in the context of the season or a particular time, i.e. during the festive season and Diwali pollution highly increases and it continues till April. During COVID-19, to avoid the contamination and spreading of the virus, Govt of India declared Lockdown and due to this all the industrial works gets stopped and the reduction of vehicular waste also reduced and thus the concentration of pollutants (μg/m 3 ) decreases immensely. It can be interpreted that due to closure of industries and decreases in the number of vehicles, the concentration of the pollutants decreases thus it can be said that COVID-19 is a blessing to nature. But after reopening, i.e. unlock 1 the concentration, increases rapidly and immensely and from the reports, it is evident that in only in ecological regions, there is an increase of 400%. Thus after