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Zhetisay, nestled within the Türkistan Region of Kazakhstan, occupies a geographically significant position at the foothills of the Trans-Ili Alatau mountains (approximately 40.7753° N, 68.3272° E). The city’s elevation, averaging around 850 meters above sea level, contributes to a unique microclimate and influences local air circulation patterns. Surrounded by a landscape dominated by semi-arid steppe transitioning into rugged mountain terrain, Zhetisay experiences a distinct urban–rural gradient. To the north and east, agricultural lands, primarily focused on wheat and barley cultivation, extend outwards, while the southern and western approaches are defined by the increasingly steep slopes of the Alatau range. The Chu River, though not directly adjacent, flows relatively nearby, impacting regional humidity and potentially influencing pollutant dispersal. While Zhetisay itself is a relatively small city, its regional importance as a transport hub and administrative center means it experiences moderate traffic volume. There are no major heavy industries directly within the city limits, but the surrounding region supports some mining activities and agricultural processing, which can contribute to localized air pollution episodes. The topography, with the mountains acting as a barrier, can trap pollutants, particularly during periods of calm weather, leading to inversions and reduced air quality. The city’s layout, characterized by a mix of Soviet-era apartment blocks and newer residential developments, also influences local wind patterns and pollutant dispersion.

Zhetisay’s air quality follows a distinct seasonal pattern dictated by its continental climate. Winters (December-February) are typically the most challenging, characterized by prolonged periods of temperature inversion. Cold, dense air settles in the valleys, trapping pollutants released from residential heating (primarily coal and wood) and any emissions from nearby agricultural processing. Fog is also common during these months, further exacerbating the problem by reducing atmospheric mixing and increasing particulate matter concentrations. Spring (March-May) brings a gradual improvement as temperatures rise and wind speeds increase, dispersing pollutants. However, dust storms originating from the surrounding steppe can significantly degrade air quality during windy periods. Summer (June-August) generally offers the best air quality, with frequent convective mixing and relatively low pollutant emissions. However, occasional heatwaves can lead to stagnant air and elevated ozone levels. Autumn (September-November) sees a transition period, with decreasing temperatures and increasing wind speeds, but also the potential for agricultural burning, which can contribute to localized smoke pollution. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during winter months, limiting outdoor activity on days with persistent fog or calm conditions. Spring dust storms necessitate the use of masks. While summer generally provides cleaner air, heatwaves warrant awareness of potential ozone impacts. Maintaining indoor air quality through ventilation and air purification can be beneficial throughout the year.