India, Jan. 21 -- The Commission for Air Quality Management (CAQM) on Monday revoked Stage-IV restrictions of the Graded Response Action Plan (GRAP) across the entire Delhi-NCR. The decision was taken by the CAQM Sub-Committee on GRAP after Delhi's daily average Air Quality Index (AQI) fell to 378 on January 20. The AQI fell from 410 a day earlier and 440 on January 18, according to data from the Central Pollution Control Board (CPCB). Stage-IV had been imposed on January 17 following a sharp deterioration in air quality.

Officials said the easing of restrictions was driven by favourable meteorological conditions, including improved wind speed, which helped disperse pollutants. Forecasts by the India Meteorological Department (IMD) and t...