According to an analysis by the Centre for Science and Environment, although the average PM 2.5 level in Delhi this winter was the lowest since 2018-19, Delhi remains the most polluted city in the National Capital Region. 

The improvement was attributed to meteorology and emergency action based on pollution forecasting. 

The average PM 2.5 level in Delhi from October 1 to January 31 was 160 µg/m3, lower than the previous year. 

However, the highest average PM 2.5 level of 211 µg/m3 was recorded at the Nehru Nagar monitoring station, and Jahangirpuri was the most polluted neighborhood. Hotspots are identified in North and East Delhi.