Hello,

For this you can search the google right. Pollution is not something that is very constant. As winters have arrived in delhi so is smog. The pollution is high around Diwali. So it is very safe to be in campus around this time. New Delhi has the highest ambient particulate matter pollution exposure in the country. As of 2020, the average annual PM 2.5 concentration across India was 58.1 micrograms per cubic meter; Delhi's average PM 2.5 concentration for the year 2020 was 98.6 micrograms per cubic meter.

Hope this helps!!