Even amid military strikes and fires at oil facilities, Tehran’s air is clearer than New Delhi’s. Reading at 12.30 PM shows Tehran’s Air Quality Index (AQI) in the “good to moderate” range of 50-70, while
New Delhi frequently records “poor to unhealthy” levels above 128.
Why Tehran has better AQI than Delhi?
Tehran, with nearly nine million people, has cleaner air despite conflict. The difference lies in structural pollution sources in northern India. New Delhi sits in the Indo-Gangetic Plain, surrounded by dense industry, heavy traffic, construction dust, and seasonal crop burning in nearby states like Punjab and Haryana. These release large amounts of fine particulate matter (PM2.5), the main cause of toxic smog.
Weather and geography worsen Delhi’s pollution. Weak winds and temperature inversions trap pollutants near the ground, especially in winter and early summer. Studies show pollution in Delhi and the surrounding NCR region regularly exceeds national standards and is among the highest in India.
Tehran is not pollution-free. Traffic is the main contributor, but the city lacks large-scale crop burning and dense industrial clusters that plague Delhi. While Tehran’s basin-like geography can trap pollution during winter, background particulate levels are typically lower than in Delhi.
Iran war and impact on AQI
The ongoing US-Israel-Iran conflict has left toxic marks in parts of Tehran, including reports of petrol rain after bombings at Iranian oil depots. Some speculated that these fires would affect air quality widely, but experts note that haze in northern India was caused by dust from Balochistan and the Thar Desert, not smoke from Iran.
Meanwhile, for Delhi’s more than 20 million residents, the battle for clean air is a long-term challenge requiring policy, technology, and regional cooperation.
