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Oleksandriia, situated in the Kirovohradska Oblast of central Ukraine, occupies a geographically significant position within the broader Dnipro River basin. Located at approximately 48.67° N, 33.12° E, the city rests on a gently undulating plain, characteristic of the Central Ukrainian Upland, with an average elevation of around 110 meters. This relatively flat terrain, while facilitating urban expansion, can also contribute to localized air quality challenges, particularly during periods of temperature inversion. The surrounding landscape is predominantly agricultural, a patchwork of fertile fields used for grain and sunflower cultivation, a key feature of the Kirovohrad region. To the east lies the expansive steppe, gradually transitioning into the forest-steppe zone further west. While Oleksandriia itself is not directly adjacent to a major river, its proximity to the Southern Bug and the Dnipro influences regional weather patterns and moisture levels. The urban–rural gradient is relatively sharp; the city is clearly delineated from the agricultural lands, though industrial activity, primarily related to food processing and machinery, exists within the city limits and surrounding settlements. This industrial presence, combined with agricultural practices like fertilizer use and occasional field burning (though increasingly regulated), contributes to localized pollution sources. The city’s location away from major industrial belts, however, mitigates some of the broader pollution risks seen in larger Ukrainian cities. The prevailing winds generally flow from the west, carrying potential pollutants eastward, a factor influencing air quality distribution within the city and the wider region.

Oleksandriia’s air quality experiences a distinct seasonal cycle heavily influenced by its continental climate. Spring (March-May) often brings a gradual improvement as temperatures rise and winds increase, dispersing accumulated winter pollutants. However, agricultural activities, including the application of fertilizers and pesticides, can introduce localized spikes in particulate matter and volatile organic compounds. Summer (June-August) typically sees relatively cleaner air, with frequent convective mixing driven by daytime heating, which helps to ventilate the atmosphere. However, periods of intense heat can lead to stagnant air conditions and ozone formation. Autumn (September-November) presents a more complex picture. As temperatures cool, the likelihood of temperature inversions increases, trapping pollutants near the ground, particularly in the mornings. Agricultural burning, though restricted, can still occur, contributing to smoke and particulate pollution. The most challenging period is winter (December-February). Cold, stable air masses, frequent fog, and temperature inversions create persistent conditions for pollutant accumulation. Reduced wind speeds further exacerbate the problem, leading to a build-up of emissions from residential heating (often using coal or wood) and industrial sources. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should limit outdoor activity during these periods, especially on days with dense fog or calm winds. Maintaining indoor air quality through ventilation and air purifiers is also advisable. The transition months of spring and autumn require careful monitoring of agricultural practices and adherence to any burn bans.