Delhi’s air quality remained in the ‘very poor’ category on Monday morning for the fourth consecutive day as per the data uploaded by the Central Pollution Control Board (CPCB). Delhi’s Air Quality Index (AQI) reading at 7am was 344, a marginal improvement from Sunday’s 349.

Air quality enters the ‘very poor’ zone between the 301-400 mark and crosses over to the ‘severe’ zone after exceeding 400.

On Sunday, Delhi’s air quality plunged to ‘severe’ in at least three areas and remained in the ‘very poor’ zone for most other parts. On Saturday, the city’s overall AQI reading was 345.

While scientists at the India Meteorological Department (IMD) have predicted that an improvement in wind speed might spell good news for the city, it could be negated by the likely high import of smoke from stubble burning from Punjab and Haryana, keeping the pollution levels in the ‘very high’ zone