New Delhi : Delhi's air quality was on the brink of turning severe on Tuesday morning which witnessed worst pollution of the season as stubble burning in neighbouring states intensified, authorities said. The air quality of Delhi was recorded at 397, just three points below the severe level and highest of this season, according to the data of the Central Pollution Control Board.
Seventeen areas of the national capital recorded severe air quality, the data said. An AQI between 0 and 50 is considered "good", 51 and 100 "satisfactory", 101 and 200 "moderate", 201 and 300 "poor", 301 and 400 "very poor", and 401 and 500 "severe".
The Centre-run System of Air Quality Forecasting And Research (SAFAR) attributed "heavy stubble burning in the last 24 hours and calm winds as the reason behind the further deterioration of air capital. The SAFAR said about 28 per cent of pollution by PM2.5 (presence of particles in the air with a diameter of less than 2.5 micrometres) on Tuesday was caused due to regional factors like stubble burning. PTI
