Delhi’s air quality worsened to an AQI of 353—classified as 'very poor'—on December 27, exacerbated by dense fog trapping pollutants, according to the Central Pollution Control Board.
This update continues Delhi-NCR's severe winter pollution challenges reported earlier in December, where AQI levels had already exceeded 350 amid low ventilation and fog. On December 27, 2025, the overall AQI reached 353, with smog causing low visibility and heightened health risks for residents. While seasonal factors like calm winds and emissions intensify the issue annually, no new measures were detailed in the latest CPCB data.