Sudden dip in Air quality index

Dear Chennaites, I've been tracking AQI, of chennai, and it's always been within 80 , nowadays it's inching very much regularly to 100+, which had never been the case, previously, why is there a sudden dip, anybody have any answer? How do you people handle your everyday?

Dear Chennaites, I've been tracking AQI, of chennai, and it's always been within 80 , nowadays it's inching very much regularly to 100+, which had never been the case, previously, why is there a sudden dip, anybody have any answer? How do you people handle your everyday?