Delhi Becomes the Most Polluted City in the World; Air Quality Reaches ‘Hazardous’ Levels, Breathing Turns Difficult

New Delhi (The Uttam Hindu): On Diwali, the national capital once again choked under a blanket of toxic air. According to the latest report by Switzerland-based environmental monitoring agency IQAir, Delhi has surpassed all major global cities to become the most polluted city in the world on Tuesday.

Delhi’s Toxic Air – AQI Soars to 442

As per IQAir data, Delhi’s Air Quality Index (AQI) reached 442, which falls in the “hazardous” category. This level is nearly 59 times higher than the annual air quality guideline set by the World Health Organization (WHO). The report stated that the concentration of PM2.5 particles — microscopic pollutants smaller than 2.5 micrometers — has reached alarming levels. These particles penetrate deep into the lungs, increasing the risk of heart and respiratory diseases.

Firecrackers and Smoke Worsen Delhi’s Condition

Despite the Supreme Court’s limited approval for green firecrackers, reports revealed that residents burst firecrackers beyond the permitted hours. As a result, thick smog and smoke enveloped large parts of the capital from Diwali night through the next morning, severely deteriorating visibility and air quality.

CPCB Warning: Air Still ‘Very Poor’

The Central Pollution Control Board (CPCB) has also classified Delhi’s air as “very poor.” On Tuesday, the average AQI was recorded at 350, still well above the safe limit.

No Relief Ahead, Weather to Worsen Air Quality

According to the Ministry of Earth Sciences, no major improvement in Delhi’s air quality is expected in the coming days. As temperatures drop and wind speed decreases, pollutants remain trapped in the atmosphere. The ministry warned that air quality is likely to stay between the “very poor” and “severe” categories (AQI 201–400).

Experts have cautioned that if the situation continues unchecked, Delhi’s air could become even more toxic in early November, posing serious health risks to children, the elderly, and asthma patients.