According to the Central Pollution Control Board's November 12 bulletin, Srinagar was India's least polluted city, recording an Air Quality Index (AQI) of 19, followed by Aizawl (22). Dehradun and Rupnagar recorded AQI of 42 each, followed by Shillong (43), Byasanagar and Naharlagun (44 each), Chamarajanagar (47), and Kalaburagi and Shivamogga (48 each). All 10 cities recorded 'good' air quality.