New Delhi, Nov. 11 -- The Centre on Tuesday invoked stricter anti-pollution measures under Stage III of the Graded Response Action Plan (GRAP) in Delhi-NCR after the city's air quality slipped into the 'severe' category.

The decision was taken after Delhi's average Air Quality Index (AQI) rose sharply from 362 on Monday to 425 on Tuesday morning due to calm winds, a stable atmosphere and unfavourable weather conditions that allowed pollutants to accumulate close to the surface, the Commission for Air Quality Management (CAQM) said.

The AQI of Delhi which was recorded as 362 on 10.11.2025, exhibited a sharp increasing trend and has been recorded 425 at 9:00 AM on 11.11.2025 owing to calm winds, stable atmosphere and unfavourable meteorol...