Tehran skilled a uncommon second of fresh air on Sunday, March 23, 2025, recording an Air High quality Index (AQI) of simply 22 — inserting it among the many cleanest capitals on the planet for the day.
In accordance with knowledge from Tehran’s Air High quality Monitoring Middle, this determine positioned the town because the third cleanest capital globally, a rare occasion for a metropolis extra typically ranked among the many most polluted.
A number of elements contributed to the sudden enchancment in air high quality. A mixture of spring rainfall, sturdy winds, and considerably decreased automobile site visitors as a result of Nowruz holidays helped disperse pollution and clear the ambiance.
As is customary in the course of the Persian New Yr break, hundreds of thousands of Tehran residents depart the town, leading to decrease emissions and fewer congestion on the capital’s roads.
Simply days earlier, experiences confirmed that Tehran had solely seven clean-air days all through your entire earlier yr, with most days falling into unhealthy or borderline classes.
