A thick layer of smog continued to cover Delhi on Tuesday as the city's air quality remained in the 'very poor' category for the third straight day, recording an Air Quality Index (AQI) of 309, according to the Central Pollution Control Board (CPCB). Data from the CPCB's Sameer app showed that Alipur (421), Jahangirpuri (404) and Wazirpur (404) were the most polluted areas, with AQI levels falling into the 'severe' category.

As per CPCB standards, an AQI between 0-50 is 'good', 51-100 'satisfactory', 101-200 'moderate', 201-300 'poor', 301-400 'very poor', and 401-500 'severe'.

Out of the 39 air quality monitoring stations across Delhi, most reported levels ranging from 'poor' to 'very poor', showing little improvement in the city's air conditions.

Delhi's air quality remained in the 'very poor' category for the third straight day on Monday, though stronger daytime winds brought slight relief, according to the Central Pollution Control Board (CPCB). The 24-hour average Air Quality Index (AQI) was 309 at 4 p.m., compared to 366 a day earlier, indicating a small improvement.

However, forecasts suggest that this relief may not last long. A western disturbance approaching the region is likely to reduce wind speed and raise humidity levels from Tuesday, leading to stagnant air conditions that could cause pollutants to accumulate once again.