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Makhu, a small town nestled in the Fazilka district of Punjab, India, occupies a geographically significant position within the Indo-Gangetic Plain. Located at approximately 31.1033° N, 74.9963° E, its terrain is predominantly flat, characteristic of the fertile alluvial plains formed by the Indus River and its tributaries. The elevation is relatively low, contributing to atmospheric stability and potential for pollutant accumulation. The town sits close to the India-Pakistan border, influencing regional dynamics and, indirectly, agricultural practices. Surrounding Makhu is a landscape dominated by intensive agricultural land, a crucial element in the region's economy but also a significant contributor to air pollution. The urban–rural gradient is sharp; Makhu itself is a relatively compact settlement, transitioning quickly into expansive farmlands cultivated with wheat, rice, and cotton. This agricultural belt utilizes substantial amounts of fertilizers, pesticides, and, critically, crop residue burning, a major source of particulate matter. The proximity to the Sutlej River, though providing a water source, doesn't significantly influence local air quality due to the prevailing wind patterns and the dominance of agricultural emissions. Industrial activity in the immediate vicinity is limited, but Makhu’s location within the broader Punjab industrial belt means it is susceptible to pollutants transported from larger industrial centers. The flat topography and lack of natural barriers exacerbate the issue, allowing pollutants to linger and accumulate, particularly during periods of stagnant air.

Makhu's air quality follows a distinct seasonal pattern dictated by the region's climate and agricultural practices. The dry winter months (October to February) are consistently the most challenging. Cold temperatures lead to frequent temperature inversions, trapping pollutants near the ground. Agricultural residue burning, a widespread practice after the harvest of rice and wheat, intensifies dramatically during this period, releasing massive quantities of particulate matter and other harmful gases. Dense fog, common in winter, further restricts atmospheric dispersion, exacerbating the problem. Spring (March-May) brings a slight improvement as temperatures rise and winds increase, aiding in pollutant dispersal, though dust from agricultural activities remains a concern. The monsoon season (June-September) offers a period of relative respite, with rainfall washing away pollutants and increased wind speeds facilitating their removal. However, heavy rainfall can also lead to localized flooding and the release of pollutants from waterlogged areas. The post-monsoon period (October) sees a gradual deterioration as conditions become drier and cooler, setting the stage for the peak pollution season. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise extreme caution during the winter months, limiting outdoor exposure and using air purifiers when possible. During the peak burning season, even healthy individuals should minimize strenuous outdoor activities and consider wearing masks.