Official announcement released by Government of India via Press Information Bureau (PIB). Delhi's AQI on Friday was only 18 points fewer than the threshold of “severe” AQI, and worse off than the AQI of 369 recorded the day before. New Delhi: Ahead of the Diwali festivities, the Commission for Air Quality Management (CAQM) has enacted Stage III of the Graded Response Action Plan (GRAP) across the Delhi-National Capital.