Delhi’s air quality hits very poor at 303 AQI post-Deepavali, worsened by stubble burning from neighboring states. Delhi's air quality worsened to 'very poor' on Wednesday (November 11, 2026), with the AQI settling at 303, the Central Pollution Control Board data showed. Delhi's air quality plunged into the very poor category on Wednesday with the overall Air Quality Index settling at 303, according to CPCB data.