Delhi's overall Air Quality Index (AQI) recorded a marginal improvement on December 16, 2025, standing at 378 by 8 am, placing the national capital in the 'very poor' category according to the Central Pollution Control Board (CPCB). This represents a slight easing from the previous day, when the AQI peaked at 427 around 4 pm, entering the 'severe' zone and triggering heightened health concerns. Despite the dip, persistent hazardous conditions continue to affect residents amid winter pollution challenges.

A thick layer of toxic smog blanketed the city, significantly reducing visibility and exacerbating respiratory issues for vulnerable groups. Key landmarks and monitoring stations reflected varying but elevated pollution levels, with India Gate registering an AQI of 380 and Sarai Kale Khan at approximately 359, both firmly in the 'very poor' range that can cause breathing discomfort for most people upon prolonged exposure.

Hotspots in eastern Delhi fared worse, as Ghazipur and Anand Vihar both reported AQIs around 410, classifying them as 'severe'. Such readings indicate air quality severe enough to impact healthy individuals and seriously aggravate conditions for those with pre-existing heart or lung diseases, prompting advisories to limit outdoor activities.

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The ongoing smog episode underscores seasonal factors like low wind speeds, vehicular emissions, stubble burning in neighbouring states, and construction dust that trap pollutants during colder months. Authorities continue to monitor the situation closely, with potential enforcement of Graded Response Action Plan measures if conditions deteriorate further, as Delhi grapples with one of its recurring winter air quality crises.

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