Despite an early morning rain on Sunday, the spike in pollution levels was witnessed in Delhi. In fact, the change in weather has adversely affected air quality -- puzzling environmental experts.
The pollution measuring stations in Delhi-NCR showed a severe pollution level. Air quality deteriorated further but remained in the 'severe' category in Delhi-NCR on Sunday, with the pollution level hovering at 447. The air quality in Delhi and the surrounding regions has remained in the 'severe' category despite the wind activity which had picked up on Saturday evening.
Two days after the Delhi-NCR recorded its worst air quality forcing authorities to shut schools, ban construction activities and declare a public health emergency, the overall Air Quality Index (AQI) was at 447 at 5:30 am. The overall AQI in Delhi was 402 at 8 pm on Saturday.
The air quality in Anand Vihar was recorded at 478 and 463 at Alipur. The most deteriorated air quality, 486, was recorded at ITO. Most areas recorded an AQI of above 450 on Sunday morning.
An AQI between 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 above 500 falls in the 'severe plus' category.
The share of stubble burning in Delhi's pollution reduced from 44 per cent on Friday, the season's highest, to 17 per cent on Saturday, government air quality monitor SAFAR said.