As per the latest news, GRAP-4 was revoked as air quality improved. Delhi Environment Minister Gopal Rai to chair a meeting today to decide on reopening of primary schools. The overall air quality in the national capital recorded a further improvement on Monday. The average Air Quality Index (AQI) on Monday morning was recorded at 316, continuing in the ‘very poor’ category, according to the System of Air Quality and Weather Forecasting And Research (SAFAR). AQI recorded at all monitoring stations in the city stood in the ‘very poor’ category.