Severe Air Quality Crisis in Delhi: AQI Hits 366 Amid Thick Fog

Delhi is grappling with a severe air quality crisis as the Air Quality Index (AQI) reaches 366, categorizing it as 'very poor'. The Central Pollution Control Board reports alarming pollution levels, particularly in Narela, where the AQI hit 418. With predictions of continued poor air quality for the next several days, health concerns are rising. The India Meteorological Department highlights low wind speeds and chilly temperatures, exacerbating the situation. Read on to learn more about the implications of this environmental challenge.

By Narendra Chaudhary Dec 22, 2025, 10:56 IST

Delhi's Air Quality Deteriorates

On Monday morning, a thick layer of fog enveloped the national capital, leading to a significant decline in air quality, which was recorded in the 'very poor' category with an Air Quality Index (AQI) of 366, as reported by the Central Pollution Control Board (CPCB).

According to the CPCB, pollution levels at seven monitoring stations across Delhi were classified as 'severe', with Narela being the most polluted area, registering an alarming AQI of 418.

The CPCB categorizes AQI levels as follows: 0-50 is considered 'good', 51-100 'satisfactory', 101-200 'moderate', 201-300 'poor', 301-400 'very poor', and 401-500 'severe'.

The Air Quality Early Warning System (AQEWS) indicates that Delhi's air quality is expected to remain in the 'very poor' category for the next three days, followed by a forecast of fluctuating between 'very poor' and 'severe' for the subsequent six days.

The India Meteorological Department (IMD) noted that the average wind speed is currently below 10 kilometers per hour, which is not conducive for dispersing pollutants. Additionally, the minimum temperature in Delhi was recorded at 9.3 degrees Celsius.