Ballabhgarh recorded an AQI of 419 and Delhi 403 on Friday morning, while all 10 major NCR cities reported readings above 300. Ballabhgarh in Haryana recorded the highest air pollution level among major cities in the Delhi-NCR region, with an Air Quality Index (AQI) of 419. Delhi followed closely with an AQI of 403 at 7:05 am on Friday, placing both in the severe category, according to the SAMEER app, the official.