Delhi witnessed a sudden and extreme surge in coarse particulate pollution (PM10), with levels skyrocketing by up to 44 times within hours, blanketing the city in a thick, grey haze.

Delhi witnessed a sudden and extreme surge in coarse particulate pollution (PM10), with levels skyrocketing by up to 44 times within hours, blanketing the city in a thick, grey haze.

Data shows that Delhi's average Air Quality Index (AQI) for the month of April 2025 is the worst recorded in the past three years. The figures indicate a clear reversal of recent improvements.

The geographical location of Bihar cities on the Indo-Gangetic plain makes them vulnerable to air pollution. Ekta Shekhar, founding director of The Climate Agenda, while talking to TOI’s Faryal Rumi, said that while policies exist on paper, their implementation remains weak.

The city recorded a ‘satisfactory' air day for the second day in a row with an Air Quality Index (AQI) of 99 on Sunday.