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Arzgir, nestled within the Stavropol’skiy Kray of southwestern Russia (45.3694° N, 44.2281° E), occupies a geographically significant position at the edge of the Ciscaucasian Plain. The town’s terrain is gently undulating, characterized by fertile steppe grasslands that transition into the foothills of the Caucasus Mountains to the south. This location dictates a semi-arid climate, influenced by continental air masses and the proximity to the mountains. Arzgir sits approximately 150 meters above sea level, contributing to localized temperature variations and potential for cold air pooling during winter months. The surrounding landscape is predominantly agricultural, with extensive fields dedicated to grain and sunflower cultivation, a key economic driver for the region. While Arzgir itself is a relatively small urban center, it lies within a broader agricultural belt, and its air quality is inevitably linked to farming practices, including fertilizer use and potential field burning. The urban–rural gradient is gradual, with scattered villages and agricultural land surrounding the town. The absence of major rivers or lakes within immediate proximity limits natural air purification processes. Furthermore, while not directly adjacent to a major industrial hub, Arzgir’s location within the Stavropol’skiy Kray, a region with some industrial activity, means it can be affected by transboundary pollution events. The prevailing winds, generally from the west and southwest, can carry pollutants from more distant industrial zones, impacting local air quality.

Arzgir’s air quality experiences a distinct seasonal cycle heavily influenced by meteorological conditions. Winters (December-February) are typically the most challenging period. Cold temperatures frequently lead to temperature inversions, where a layer of warm air traps cooler air near the ground, preventing pollutants from dispersing. This phenomenon, coupled with reduced sunlight hours and frequent fog, results in a build-up of particulate matter and other emissions. Agricultural activities, including the potential for controlled burns of crop residue (though increasingly regulated), can exacerbate this issue. Spring (March-May) brings a gradual improvement as temperatures rise, and wind speeds increase, aiding in pollutant dispersion. However, dust storms from the exposed steppe lands can temporarily degrade air quality. Summers (June-August) are generally the most favorable period, with warm temperatures, consistent winds, and ample sunlight promoting good air quality. The dry climate, however, can increase the risk of wildfires, which can significantly impact local air. Autumn (September-November) sees a transition period, with decreasing temperatures and increasing humidity. The combination of cooler air and reduced wind speeds can lead to stagnant air conditions, particularly in October and November, potentially triggering localized pollution episodes. Sensitive groups, such as children, the elderly, and individuals with respiratory conditions, should exercise caution during winter months and be mindful of potential dust events in spring. Outdoor activities are generally best enjoyed during the summer months, while limiting exposure during periods of fog or stagnant air is advisable.