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Dhanot, a small city nestled in the fertile plains of Punjab, Pakistan (29.5333° N, 71.6333° E), occupies a geographically significant position within a region heavily influenced by agricultural practices and regional industrial activity. Situated at a relatively low elevation, approximately 218 meters above sea level, Dhanot experiences a flat, alluvial terrain characteristic of the Indo-Gangetic Plain. This flatness, while conducive to agriculture, contributes to poor air circulation, particularly during periods of stagnant weather. The surrounding landscape is dominated by expansive agricultural fields, primarily cultivating wheat, cotton, and rice – crops that rely heavily on irrigation and, unfortunately, often involve the burning of crop residue after harvest, a significant contributor to regional air pollution. Dhanot lacks proximity to major bodies of water, which would otherwise offer some degree of evaporative cooling and atmospheric cleansing. The city’s location places it within reach of industrial belts concentrated in nearby cities like Ludhiana and Jalandhar, with associated emissions occasionally impacting local air quality. The urban-rural gradient around Dhanot is gradual, with agricultural land seamlessly blending into the city’s periphery, meaning agricultural emissions are a constant, localized factor. The prevailing winds, often light and variable, can trap pollutants, exacerbating the impact of local sources. The flat topography and lack of natural barriers further impede the dispersion of airborne contaminants, making Dhanot susceptible to localized air quality challenges.

Dhanot’s air quality follows a distinct seasonal pattern dictated by the region’s climate and agricultural practices. The winter months (November to February) are typically the most challenging. Cold temperatures frequently lead to temperature inversions, where a layer of warm air traps cooler air near the ground, preventing pollutants from dispersing vertically. Coupled with frequent fog, a common occurrence due to high humidity and low temperatures, this creates a stagnant atmospheric condition where pollutants accumulate. Crop residue burning, a widespread practice after the harvest of rice and wheat, intensifies during this period, releasing substantial amounts of particulate matter and other harmful gases. Spring (March to May) sees a gradual improvement as temperatures rise and winds become more frequent, aiding in pollutant dispersal. However, dust storms originating from the Thar Desert to the south can occasionally impact air quality. The monsoon season (June to September) brings relief with increased rainfall, which helps to wash pollutants from the atmosphere. However, heavy rainfall can also lead to waterlogging and the release of methane from flooded fields. Finally, the pre-monsoon period (October) often sees a return to poorer air quality as temperatures drop and the conditions for inversion and fog reappear. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the winter months and avoid prolonged outdoor exposure when visibility is reduced. During periods of dust storms, wearing a mask is advisable.