New Delhi, OCT 08 :
Delhi’s air quality has slipped back to poor category due to change in direction of wind, which is now flowing from stubble burning areas in Punjab and Haryana, authorities said Monday.
The air quality Sunday had improved to moderate level with an index of 181 but Monday the air quality slipped to poor category with the Air Quality Index (AQI) at 235, according to data at the Centre-run System of Air Quality and Weather Forecasting and Research (SAFAR).
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.
An official at the Central Pollution Control Board attributed the reason behind the slight improvement on Sunday to less traffic and improvement in wind speed but as the traffic increased on Monday the pollution in the city again rose and the air quality fell.
