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Jaranwala, situated in the heart of Punjab, Pakistan, at coordinates 31.3333°N, 73.4167°E, occupies a relatively flat alluvial plain characteristic of the broader Indo-Gangetic Plain. The city’s elevation is low, contributing to limited atmospheric dispersion of pollutants. This geographical setting, while fertile for agriculture, presents challenges for air quality. Jaranwala is surrounded by intensely cultivated agricultural lands, primarily wheat, rice, and cotton, with associated seasonal burning of crop residue – a significant source of particulate matter. The city lies within a region experiencing rapid industrial growth, particularly in textiles and related manufacturing, concentrated around Faisalabad, a major industrial hub just to the southeast. This proximity introduces industrial emissions into the regional air shed. The urban-rural gradient is sharp; Jaranwala itself is a growing urban centre, but quickly transitions to rural farmland. The Ravi River flows some distance to the south, offering limited influence on local wind patterns but not directly mitigating pollution. The lack of significant topographical features hinders natural ventilation, trapping pollutants during stable atmospheric conditions. This combination of factors makes Jaranwala particularly vulnerable to air pollution episodes.

Jaranwala experiences a distinct seasonal air quality pattern. The winter months (November to February) are typically the worst, characterized by temperature inversions that trap pollutants near the ground. Calm winds and frequent fog exacerbate the situation, leading to high concentrations of particulate matter (PM2.5 and PM10). Crop residue burning after the harvest season further degrades air quality during this period. March and April bring some improvement as temperatures rise and winds pick up, but dust storms originating from the west can temporarily worsen conditions. The monsoon season (July to September) offers a period of relatively cleaner air, as rainfall washes away pollutants and stronger winds disperse emissions. However, increased humidity can also promote the formation of secondary pollutants. October sees a gradual deterioration as the monsoon retreats and agricultural activities resume, including preparation for the Rabi crop. Summer (May-June) can be moderately polluted due to high temperatures and stagnant air, but generally less severe than winter. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor activity during winter and periods of dust storms. Monitoring local conditions is crucial.