Air is the major component of Environment and for this it is necessary for the air to be fresh. AQI is the parameter to evaluate the pollution level in which PM2.5 concentration play a major role in affecting the pollution level. Due to COVID-19 Pandemic lockdown a drastic change in the pollution level is marked. For more clear result we did the comparison of cities with completely followed lockdown policy or partial. As a result, there is declination in the air pollution level by 55.60% in India. The aim of this study is to show that pollution already exist as a major issue in society. As corona is on the focus because it is so contagious, but pollution is a slow poison too. Preserving environment is in our hand and we expect the society to take this issue also into consideration in present and after lockdown.