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Qarqīn, nestled within the Jowzjān Province of Afghanistan, occupies a geographically significant position in the northern reaches of the country. Located at approximately 37.4128° latitude and 66.0472° longitude, the city sits within a landscape dominated by the foothills of the Hindu Kush mountain range. This terrain dictates a generally undulating topography, with elevations ranging from approximately 800 to 1200 meters above sea level. The surrounding landscape is characterized by semi-arid steppe, transitioning into rugged, mountainous terrain further afield. While Qarqīn itself lacks immediate proximity to major rivers or lakes, the nearby Balkh River provides a crucial water source for the region, influencing agricultural practices in the surrounding areas. The urban–rural gradient around Qarqīn is relatively sharp; the city is encircled by agricultural lands primarily dedicated to wheat and barley cultivation, interspersed with scattered rural settlements. This agricultural activity, coupled with the potential for localized burning of crop residue, contributes to regional air quality concerns. The city’s location within a basin-like valley can exacerbate air pollution episodes, particularly during periods of temperature inversion. Industrial activity is limited, primarily consisting of small-scale workshops and agricultural processing facilities, but the transportation sector, reliant on older vehicles, represents a notable source of emissions. The prevailing winds, often channeled through the surrounding mountains, can either disperse pollutants or trap them within the valley, significantly impacting local air quality.

Qarqīn’s air quality experiences a distinct seasonal cycle heavily influenced by its continental climate and surrounding topography. Winters (December-February) are typically characterized by cold temperatures, frequent fog, and periods of temperature inversion, trapping pollutants close to the ground and leading to potentially poorer air quality. The lack of strong winds during these months further exacerbates this issue. Spring (March-May) brings a gradual warming trend and increased wind activity, which generally improves air quality as pollutants are dispersed. However, agricultural burning, a common practice for land preparation, can introduce significant particulate matter into the atmosphere during this period. Summers (June-August) are hot and relatively dry, with moderate wind speeds. While temperatures are high, the drier conditions and occasional wind gusts can help to ventilate the city. Autumn (September-November) sees a return to cooler temperatures and a gradual increase in fog, mirroring the winter conditions and potentially leading to a decline in air quality. The months of December through February are generally the most challenging for outdoor activity, particularly for vulnerable populations such as children, the elderly, and individuals with respiratory conditions. During these months, limiting prolonged outdoor exposure and avoiding strenuous activity is advisable. The agricultural cycle, with its associated burning practices, necessitates heightened awareness during the spring months. Staying informed about local conditions and taking precautionary measures, such as wearing masks when air quality is visibly affected, can help mitigate potential health risks.