Air pollution has intensified across parts of northern India and neighbouring Pakistan, with Lahore emerging as the world’s most polluted city as the pre-winter smog season takes hold. While Lahore’s Air Quality Index (AQI) climbed to 447 Delhi also recorded hazardous pollution levels, prompting authorities to strengthen restrictions against emissions and dust.
The seasonal deterioration is driven by a combination of falling temperatures and sluggish winds, which allow pollutants from vehicles, construction activities and agricultural residue burning to accumulate close to the ground. The resulting toxic haze poses serious health risks, particularly to the respiratory and cardiovascular systems.
Lahore Records World’s Highest Pollution Levels
According to Swiss air-quality monitoring group IQAir, Lahore recorded an AQI of 447 early on Tuesday, placing it at the top of the global pollution rankings.
The city’s PM2.5 concentration was reported to be 60 times higher than the World Health Organization’s annual exposure guideline. These fine particles, measuring 2.5 microns or less, can penetrate deep into the lungs and increase the risk of serious respiratory and heart related diseases.
Pakistani authorities attributed the worsening conditions partly to a sharp fall in temperatures and weak wind movement. The government has stepped up action against brick kilns violating environmental regulations and urged farmers to avoid burning crop residue after harvesting.
Delhi Tightens Pollution Controls as AQI Enters Very Poor Category
Delhi is also struggling with deteriorating air quality. IQAir recorded an AQI of 215 for the capital, while India’s Central Pollution Control Board (CPCB) classified the city’s air as ‘very poor’, reporting a higher reading of 332.
The difference between the Indian and Swiss figures reflects the different AQI scales and calculation methods used by the two monitoring systems.
Delhi’s Stage II restrictions under the Graded Response Action Plan (GRAP) came into force on Monday. The measures include stricter checks on polluting vehicles, restrictions on construction activities and limits on the use of coal and firewood in eateries.
Authorities are also increasing public transport services and strengthening efforts to control dust and emissions across the National Capital Region.
Diwali Fireworks Raise Concerns Over Further Pollution
With Diwali scheduled for November 8, concerns are mounting that fireworks could worsen the already poor air quality across northern India.
India’s Supreme Court has permitted the use of low-polluting green firecrackers for only three hours each day on Saturday and Sunday, as part of efforts to limit the festival’s contribution to air pollution.
The restrictions come at a time when weather conditions are already favouring the accumulation of pollutants, increasing the possibility of prolonged smog across the region.
Seasonal Smog Poses a Growing Public Health Challenge
The annual pre-winter pollution crisis highlights the combined impact of urban emissions, industrial activity, construction dust and agricultural burning. Cold, dense air and limited wind movement can trap these pollutants, creating dangerous conditions for millions of residents.
With Lahore and Delhi both experiencing severe deterioration in air quality, authorities face mounting pressure to enforce pollution control measures and prevent further exposure to toxic air.