Delhi's winter pollution crisis: AQI hits 353 'very poor' amid dense fog

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.

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Delhi's India Gate shrouded in dense fog and smog with AQI 385 display, illustrating very poor air quality.
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Delhi AQI Hits Very Poor 385 as Dense Fog Persists

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Delhi's air quality remained very poor with an AQI of 385 on Tuesday morning, December 30, amid dense fog reducing visibility to 350 metres. The IMD issued an orange alert for moderate to dense fog, with pollution expected to worsen into the new year.

On December 28, 2025, Delhi-NCR grappled with very poor air quality, recording an average AQI of 391. Dense fog and a cold wave prompted alerts for travelers, with pollution levels alarmingly high in surrounding areas too.

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On January 14, 2026, Delhi was enveloped in dense fog, a cold wave, and toxic air, disrupting daily life. According to the Central Pollution Control Board, the city's overall Air Quality Index stood at 357 at 7 a.m., falling in the 'very poor' category. This has severely impacted public health and transportation.

A month after December's severe smog crisis, Delhi-NCR faces another intense cold wave with dense fog and very poor air quality on January 6, 2026. Noida schools are closed to protect students, while authorities issue health advisories amid ongoing winter hazards.

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Delhi recorded its coldest day of the season on Saturday, with the maximum temperature at 16.9 degrees Celsius, 5.3 notches below normal. The city's average AQI reached 398, in the 'Very Poor' category, and is forecast to turn 'Severe' on Sunday and Monday. Noida's AQI was already 'Severe' at 401.

Following Tuesday's announcement, Delhi enforced the entry ban on non-BS-VI private vehicles from outside the city and 'No PUC, No Fuel' rule on December 18, 2025. AQI soared to 356-358 in 'very poor' category amid dense fog slashing visibility to 100m, disrupting flights and trains, though winds may aid dispersion later.

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On January 17, 2026, dense fog blanketed Delhi-NCR, reducing visibility to zero and causing delays in flights and trains. Air quality worsened, prompting the imposition of GRAP-III restrictions. The IMD has warned of continued cold wave and fog for the next five days.

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