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Alga, nestled in the Aqtöbe Region of Kazakhstan, occupies a geographically significant position within the vast Kazakh steppe. Located at approximately 49.9028° N, 57.3333° E, the city sits at an elevation of around 240 meters (787 feet) above sea level, contributing to a relatively flat terrain characteristic of the surrounding landscape. The immediate area is dominated by expansive grasslands, transitioning into the semi-arid steppe environment typical of Central Asia. While Alga lacks direct proximity to major rivers, it benefits from the presence of smaller tributaries and groundwater resources, crucial for agriculture in the region. The city’s regional position places it within a zone influenced by both European and Asian weather patterns, leading to considerable seasonal temperature variations. The surrounding landscape is primarily agricultural, with extensive fields dedicated to wheat, barley, and sunflowers, creating a distinct urban–rural gradient. Further afield, the undulating steppe gradually gives way to more varied terrain. The absence of significant natural barriers, combined with the prevalence of agricultural practices and potential for localized industrial activity, can influence air quality. The flat topography can also exacerbate the effects of temperature inversions, trapping pollutants close to the ground, particularly during colder months. Alga’s location within a broad, open plain means that wind patterns play a crucial role in dispersing or concentrating airborne particles, a factor heavily influencing local air quality dynamics.

Alga’s air quality experiences a distinct seasonal cycle dictated by its continental climate. Winters (December-February) are typically the most challenging period. Cold temperatures frequently lead to temperature inversions, where a layer of warm air sits above cooler air near the ground, preventing vertical mixing and trapping pollutants. Fog, common during these months, further exacerbates the issue by reducing visibility and hindering pollutant dispersal. Agricultural burning, a traditional practice for crop residue management, can also contribute significantly to particulate matter during this time. Spring (March-May) brings a gradual improvement as temperatures rise and winds increase, helping to disperse accumulated pollutants. However, dust storms, common across the Kazakh steppe, can temporarily degrade air quality. Summer (June-August) generally sees the best air quality, with warmer temperatures promoting atmospheric mixing and frequent winds. However, occasional heatwaves can lead to stagnant air conditions. Autumn (September-November) marks a transition period, with decreasing temperatures and increasing wind speeds. Agricultural activities resume, potentially leading to localized pollution spikes. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during winter months, limiting outdoor exposure and monitoring local conditions. Spring dust storms necessitate the use of masks. While summer offers the most favourable conditions, heat advisories should be heeded, and hydration maintained. Overall, the period from late May to early September presents the most consistently breathable air in Alga.