Delhi tops the list of most polluted cities in India with an average AQI crossing 400-mark
Haryana's city Sirsa is the second most polluted city with an average AQI of 421.
With an average AQI of 365, Haryana's Faridabad is the third most polluted city in India
Mauli in Punjab records an average AQI of 337. It is the fourth most polluted city
One city in Uttar Pradesh has also figured in the list. Muzaffarnagar has an average AQI of 336
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